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Contents
- The climate of Naha
- The best time to visit Naha
- The worst time to visit Naha
- Spring weather in Naha
- Summer weather in Naha
- Autumn weather in Naha
- Winter weather in Naha
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average humidity
- Average rainfall
- Average rainfall days
- Average sea temperature
- Average daylight
- Average sunshine
- Average UV index
Climate and monthly weather forecast
The climate of Naha
Naha, the capital of Okinawa Prefecture in Japan, falls under the Köppen climate classification of Cfa, denoting a humid subtropical climate with no noticeable dry season. This southernmost city of Japan experiences considerable weather variation throughout the year, ranging from warm winters to hot summers.
The yearly average temperatures range from lows of 14.6°C (58.3°F) to highs of 31.8°C (89.2°F). Naha also undergoes considerable humidity fluctuations throughout the year, with relative humidity ranging from 66% to 83%. As for precipitation, Naha registers significant rainfall year-round, reaching its peak at 261mm (10.28") in September and displaying the least amount of precipitation at 103mm (4.06") in December.
The maritime influence of the East China Sea contributes to the warmth of the seawater throughout the year. The sea temperature hovers from 20.9°C (69.6°F) in February to 28.7°C (83.7°F) in August. With 10.5 hours of daylight in December to 13.8 hours in June, daylight hours also vary noticeably. Naha achieves the highest average number of sunshine hours, 7.7 hours per day, in July, while the lowest count is 3 hours per day in January.
The UV index, a crucial indicator of the sun's radiation intensity, peaks at 12, a very high level exposing visitors to a substantial risk of harm from unprotected sun exposure, between May and August.
The yearly average temperatures range from lows of 14.6°C (58.3°F) to highs of 31.8°C (89.2°F). Naha also undergoes considerable humidity fluctuations throughout the year, with relative humidity ranging from 66% to 83%. As for precipitation, Naha registers significant rainfall year-round, reaching its peak at 261mm (10.28") in September and displaying the least amount of precipitation at 103mm (4.06") in December.
The maritime influence of the East China Sea contributes to the warmth of the seawater throughout the year. The sea temperature hovers from 20.9°C (69.6°F) in February to 28.7°C (83.7°F) in August. With 10.5 hours of daylight in December to 13.8 hours in June, daylight hours also vary noticeably. Naha achieves the highest average number of sunshine hours, 7.7 hours per day, in July, while the lowest count is 3 hours per day in January.
The UV index, a crucial indicator of the sun's radiation intensity, peaks at 12, a very high level exposing visitors to a substantial risk of harm from unprotected sun exposure, between May and August.
The best time to visit Naha
For those desiring warm temperatures combined with lower humidity and rainfall, spring and winter present the most favourable conditions for visiting Naha. March to May, with daily high temperatures ranging from 19.5°C (67.1°F) to 26.7°C (80.1°F), promises a pleasant escape. Similarly, December to February, with temperatures fluctuating between 19.8°C (67.6°F) and 21.2°C (70.2°F), offers mild weather that attracts tourists.
Thanks to the forgiving conditions, spring and winter allow for various outdoor activities, especially exploring the city's remarkable historical sites and beautiful parks without the worry of heat exhaustion or sudden rain showers. During the spring months, visitors also get to witness the captivating beauty of cherry blossoms in full bloom.
Thanks to the forgiving conditions, spring and winter allow for various outdoor activities, especially exploring the city's remarkable historical sites and beautiful parks without the worry of heat exhaustion or sudden rain showers. During the spring months, visitors also get to witness the captivating beauty of cherry blossoms in full bloom.
The worst time to visit Naha
The summer months, from June to August, represent the most challenging period for trips to Naha. With high temperatures ranging from 29.4°C (84.9°F) to a peak of 31.8°C (89.2°F) coupled with high relative humidity values ranging from 78% to 83%, these months experience intense heat. The heat is further exacerbated by the elevated sea temperatures, from 26.6°C (79.9°F) to 28.7°C (83.7°F), and high UV index values peaking at 12 in this period.
Moreover, high levels of precipitation, notably the rainfall of 247mm (9.72") in June and 141mm (5.55") in July, add an extra level of discomfort. Experience shows that these conditions deter tourists, making it the least ideal time for a visit.
Moreover, high levels of precipitation, notably the rainfall of 247mm (9.72") in June and 141mm (5.55") in July, add an extra level of discomfort. Experience shows that these conditions deter tourists, making it the least ideal time for a visit.
Spring weather in Naha
Spring in Naha, stretching from March to May, is characterised by increasing warmth coupled with a gradual rise in precipitation levels. Day temperatures fluctuate from 19.5°C (67.1°F) to 26.7°C (80.1°F), warming up as the season progresses. Nights, too, grow warmer from 14.6°C (58.3°F) in March to 21.8°C (71.2°F) in May.
Rainfall levels also increase through spring, from 107mm (4.21") in March to a considerable 232mm (9.13") in May. Despite the increasing precipitation, the relative humidity stays relatively low, ranging from 67% to 79% over the course of the season.
Rainfall levels also increase through spring, from 107mm (4.21") in March to a considerable 232mm (9.13") in May. Despite the increasing precipitation, the relative humidity stays relatively low, ranging from 67% to 79% over the course of the season.
Summer weather in Naha
In Naha, the summer months from June to August are marked by continuous warmth and high humidity levels. Temperatures hover around a high 29.4°C (84.9°F) to 31.8°C (89.2°F), while night temperatures are also high, ranging from 24.8°C (76.6°F) to 26.8°C (80.2°F).
Rainfall in summer varies with a peak of 247mm (9.72") in June and a reduction to 141mm (5.55") in July. However, the high humidity, ranging from 78% to 83%, combined with the warming sea surface temperature, from 26.6°C (79.9°F) to 28.7°C (83.7°F), contributes a tropical climate feel.
Rainfall in summer varies with a peak of 247mm (9.72") in June and a reduction to 141mm (5.55") in July. However, the high humidity, ranging from 78% to 83%, combined with the warming sea surface temperature, from 26.6°C (79.9°F) to 28.7°C (83.7°F), contributes a tropical climate feel.
Autumn weather in Naha
Autumn sees a gradual cooldown in Naha, with daily temperatures ranging between 30.4°C (86.7°F), in the transition month of September, and easing down to 24.6°C (76.3°F) by November. Night temperatures also dwindle from 25.5°C (77.9°F) down to 19.9°C (67.8°F) in November.
Rainfall levels also diminish over the season but remain substantial, from 261mm (10.28") in September to 110mm (4.33") in November. Relative humidity decreases from 76% to 69% during this period, creating slightly more comfortable conditions.
Rainfall levels also diminish over the season but remain substantial, from 261mm (10.28") in September to 110mm (4.33") in November. Relative humidity decreases from 76% to 69% during this period, creating slightly more comfortable conditions.
Winter weather in Naha
Winter in Naha, although milder compared to other locations, can still be chilly with daily temperatures from 21.2°C (70.2°F) in December to 19.8°C (67.6°F) in January. Night temperatures also decrease, recording 16.3°C (61.3°F) in December and 14.8°C (58.6°F) in January.
Despite the cool temperatures, winter does not escape rainfall, recording 103mm (4.06") in December and 120mm (4.72") in January. However, the relative humidity is low during this period, shifting between 66% and 70%, creating a comfortable environment. Daylight hours are the shortest of the year, ranging from 10.5 hours in December to 11.3 hours in February, while sunshine hours are also fewer, from 3.7 hours in December to 3.1 in February.
Despite the cool temperatures, winter does not escape rainfall, recording 103mm (4.06") in December and 120mm (4.72") in January. However, the relative humidity is low during this period, shifting between 66% and 70%, creating a comfortable environment. Daylight hours are the shortest of the year, ranging from 10.5 hours in December to 11.3 hours in February, while sunshine hours are also fewer, from 3.7 hours in December to 3.1 in February.
Weather in January
In Naha, Japan, January marks the beginning of the year with moderate temperatures and noticeable humidity. The temperatures range from 14.6°C (58.3°F) to 19.5°C (67.1°F) readily inviting a moderate climate suitable for light clothing. Weather in January »
Weather in February
Weather conditions in February in Naha, Japan, show a subtle increase in average temperatures, continuing the trend from January. Slight fluctuations in climatic conditions do not markedly differ, maintaining a balanced environment. Weather in February »
Weather in March
March brings notable changes to the city of Naha. The transition from winter to spring heralds an increase in temperatures, accompanied by increasing humidity and rainfall. An upwards swing in rainfall amounting to 161mm (6.34") indicates a wetter month. Weather in March »
Weather in April
April in Naha signifies the zenith of spring. There is a marked increase in average high and low temperatures indicating the onset of warmer times. The month, characterized by moderate humidity and rainstorms, experiences the same level of rainfall as March, registering 161mm (6.34"). Weather in April »
Weather in May
Moving into May, Naha is in the throes of a warm and humid climate. A significant leap in temperatures and substantial rainfall indicates the city's preparation for the upcoming summer. May carries the honor of being the month with the most significant increase in rainfall, a leap from 161mm (6.34") to 232mm (9.13"). Weather in May »
Weather in June
In June, Naha, Japan, welcomes the summer season with heightened temperatures and increased humidity levels. Despite a rise in temperatures, the city sustains a reasonable climate suitable for typical summer activities. Coincidentally, the pattern of incremental increases in rainfall persists with a total downpour of 247mm (9.72"). Weather in June »
Weather in July
July in Naha marks the peak of the summer season. The city experiences heightened temperatures adding a distinct fervor to the city's vibrant summer fiesta. Interestingly enough, July experiences a decrease in rainfall to 141mm (5.55"), providing a much-needed respite from June's heavy downpour. Weather in July »
Weather in August
August weather in Naha, Japan, maintains a consistent pattern with that of July. The city continues to revel in the charm of the summer month with high temperatures and humid conditions. However, August stands out with a significant increase in rainfall, a jump to 241mm (9.49"). Weather in August »
Weather in September
September in Naha, brings about a subtle shift in weather conditions, signaling the end of summer. Gradual decline in temperatures becomes evident, indicating the approach of autumn. However, precipitation peaks this month with rainfall of 261mm (10.28"), making September the month with the highest rainfall. Weather in September »
Weather in October
October sees Naha transitioning into the cooler and drier climate of autumn. The average temperatures experience a noticeable drop, providing relief from the summer heat. Along with declining temperatures, there is a reduction in rainfall with the total precipitation amounting to 153mm (6.02"). Weather in October »
Weather in November
During November, Naha experiences a further decline in temperature, accompanied by a drop in rainfall. A clear demarcation from the wetter months, November brings semi-dry conditions and a comfortable climate. The month notices a sharp drop in rainfall to 110mm (4.33"), indicating drier days ahead. Weather in November »
Weather in December
December enhances the cooler climate in Naha, Japan, with the sharp fall in temperatures establishing the onset of winter. As the temperature goes down, there is a simultaneous drop in rainfall levels, closing the year on a drier note of 103mm (4.06"). Weather in December »
Updated: Jan 31, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What part of the year is the coldest in Naha?
January is the month when Naha, Japan, sees the average lowest temperatures, with a high of 19.5°C (67.1°F) and a low of 14.6°C (58.3°F).
How many days does it rain in Naha?
In Naha, Japan, during the entire year, the rain falls for 140.8 days and collects up to 2037mm (80.2") of precipitation.
What is the month with the least sunshine in Naha?
With an average of 3h of sunshine, January has the least sunshine of the year in Naha.
When is the sea coldest in Naha?
The month with the coldest seawater in Naha is February, with an average sea temperature of 20.9°C (69.6°F).
What is the month with the highest UV index in Naha?
The months with the highest UV index are May through August, with an average maximum UV index of 12.
What is the most humid month in Naha?
The most humid month is June, with an average relative humidity of 83%.
When are the longest days in Naha?
With an average of 13h and 48min of daylight, June has the longest days of the year in Naha.
What month is the hottest in Naha?
July, with average temperatures reaching a high of 31.8°C (89.2°F) and a low of 26.8°C (80.2°F), is the warmest month in Naha, Japan.
What month has the most sunshine in Naha?
With an average of 7.7h of sunshine, July has the most sunshine of the year in Naha, Japan.
When is the sea warmest in Naha?
August is the month with the warmest seawater, with an average sea temperature of 28.7°C (83.7°F).
What is the rainiest month in Naha?
The month with the most rainfall is September, when the rain falls for 12.5 days and typically aggregates up to 261mm (10.28") of precipitation.
What is the least humid month in Naha?
December is the least humid month in Naha, Japan, with an average relative humidity of 66%.
What is the driest month in Naha?
The month with the least rainfall is December, when the rain falls for 9.6 days and typically collects 103mm (4.06") of precipitation.
What is the month with the shortest days in Naha?
December has the shortest days of the year, with an average of 10h and 30min of daylight.
Is there Daylight Saving Time (DST) in Naha?
Naha does not utilize Daylight Saving Time (DST). JST timezone is used throughout the entire year.
When is the lowest UV index in Naha?
The month with the lowest UV index in Naha, Japan, is December, with an average maximum UV index of 5.
Average temperature
Naha, Japan
The warmest month (with the highest average high temperature) is July (31.8°C).
The month with the lowest average high temperature is January (19.5°C).
The month with the highest average low temperature is July (26.8°C).
The coldest month (with the lowest average low temperature) is January (14.6°C).
Average humidity
Naha, Japan
The month with the highest relative humidity is June (83%).
The month with the lowest relative humidity is December (66%).
Average rainfall
Naha, Japan
- Average rainfall in January:
107mm - Average rainfall in February:
119.7mm - Average rainfall in March:
161.4mm - Average rainfall in April:
161.4mm - Average rainfall in May:
231.6mm - Average rainfall in June:
247.2mm
- Average rainfall in July:
141.4mm - Average rainfall in August:
240.5mm - Average rainfall in September:
260.5mm - Average rainfall in October:
152.9mm - Average rainfall in November:
110.2mm - Average rainfall in December:
102.8mm
The wettest month (with the highest rainfall) is September (260.5mm).
The driest month (with the least rainfall) is December (102.8mm).
Average rainfall days
Naha, Japan
- Average rainfall days in January:
12.9 days - Average rainfall days in February:
12.1 days - Average rainfall days in March:
13.7 days - Average rainfall days in April:
12 days - Average rainfall days in May:
13 days - Average rainfall days in June:
11.7 days
- Average rainfall days in July:
10.4 days - Average rainfall days in August:
13.6 days - Average rainfall days in September:
12.5 days - Average rainfall days in October:
9.5 days - Average rainfall days in November:
9.8 days - Average rainfall days in December:
9.6 days
The month with the highest number of rainy days is March (13.7 days).
The month with the least rainy days is October (9.5 days).
Average sea temperature
Naha, Japan
The best month for swimming (with the highest average sea temperature) is August (28.7°C).
The coldest month (with the lowest average sea temperature) is February (20.9°C).
Average daylight / Average sunshine
Naha, Japan
- Average daylight in January:
10h and 4min - Average daylight in February:
11h and 2min - Average daylight in March:
12h and 0min - Average daylight in April:
12h and 5min - Average daylight in May:
13h and 2min - Average daylight in June:
13h and 5min
- Average daylight in July:
13h and 4min - Average daylight in August:
13h and 0min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 3min - Average daylight in November:
10h and 5min - Average daylight in December:
10h and 3min
The month with the longest days is June (Average daylight: 13h and 48min).
The month with the shortest days is December (Average daylight: 10h and 30min).
- Average sunshine in January:
3h and 0min - Average sunshine in February:
3h and 1min - Average sunshine in March:
3h and 3min - Average sunshine in April:
4h and 1min - Average sunshine in May:
4h and 4min - Average sunshine in June:
5h and 3min
- Average sunshine in July:
7h and 4min - Average sunshine in August:
6h and 5min - Average sunshine in September:
6h and 2min - Average sunshine in October:
5h and 3min - Average sunshine in November:
4h and 1min - Average sunshine in December:
3h and 4min
The month with the most sunshine is July (Average sunshine: 7h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).
Average UV index
Naha, Japan
The months with the highest UV index are May, June, July and August (UV index 12).
The month with the lowest UV index is December (UV index 5).
