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Contents
- 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 pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Climate and monthly weather forecast
Weather in January
January, the same as December, in Isahaya, Japan, is a frosty winter month, with an average temperature fluctuating between 4.4°C (39.9°F) and 9.4°C (48.9°F). January stands out as Isahaya's coldest month, with an average high-temperature of 9.4°C (48.9°F) and a low-temperature of 4.4°C (39.9°F). Weather in January »
Weather in February
February, the last month of the winter in Isahaya, is a cool month, with an average temperature fluctuating between 5.3°C (41.5°F) and 10.9°C (51.6°F). With the onset of February, a modest change to a fresh 10.9°C (51.6°F) from January's 9.4°C (48.9°F) is noted in high-temperature. Weather in February »
Weather in March
March, the first month of the spring in Isahaya, is a moderate month, with temperature in the range of an average low of 7.4°C (45.3°F) and an average high of 13.8°C (56.8°F). The arrival of March denotes a barely perceptible change in the average high-temperatures to a mild 13.8°C (56.8°F) from February's 10.9°C (51.6°F). Weather in March »
Weather in April
April is a refreshing spring month in Isahaya, Japan, with an average temperature ranging between min 11°C (51.8°F) and max 18.3°C (64.9°F). Observing a slight rise in April, the average high-temperature shifts from March's moderate 13.8°C (56.8°F) to a comfortable 18.3°C (64.9°F). Weather in April »
Weather in May
May, the last month of the spring in Isahaya, is a pleasant month, with an average temperature ranging between min 15.3°C (59.5°F) and max 22.7°C (72.9°F). May witnesses a minor rise in the average high-temperature, transitioning from an enjoyable 18.3°C (64.9°F) in April to an agreeable 22.7°C (72.9°F). Weather in May »
Weather in June
June, the first month of the summer in Isahaya, is a warm month, with an average temperature varying between 25.3°C (77.5°F) and 19.5°C (67.1°F). Isahaya signifies an average high-temperature of a warm 25.3°C (77.5°F) in June, closely mirroring the 22.7°C (72.9°F) of May. Weather in June »
Weather in July
July, the same as June, is another warm summer month in Isahaya, Japan, with an average temperature ranging between max 28.4°C (83.1°F) and min 23.3°C (73.9°F). As Isahaya, Japan, transitions into July, the average high-temperature is observed to slightly rise from a warm 25.3°C (77.5°F) in June to a still moderately hot 28.4°C (83.1°F). Weather in July »
Weather in August
August, the last month of the summer in Isahaya, is a tropical month, with an average temperature varying between 30.7°C (87.3°F) and 24.3°C (75.7°F). The warmest period is August, when temperatures fluctuate between an average high of 30.7°C (87.3°F) and a low of 24.3°C (75.7°F). The heat index value for August is calculated to be a scorching 40°C (104°F). Weather in August »
Weather in September
The first month of the autumn, September, is still a warm month in Isahaya, Japan, with temperature in the range of an average high of 27°C (80.6°F) and an average low of 21.2°C (70.2°F). Transition into September subtly marks a drop in the average high-temperature, moderately moving from a hot 30.7°C (87.3°F) in August to a warm 27°C (80.6°F). Weather in September »
Weather in October
October, like September, is another pleasant autumn month in Isahaya, Japan, with temperature in the range of an average high of 22.6°C (72.7°F) and an average low of 16.5°C (61.7°F). October's arrival subtly correlates with a reduction in the average high-temperature, down from a warm 27°C (80.6°F) in September to a pleasant 22.6°C (72.7°F). Weather in October »
Weather in November
The last month of the autumn, November, is another refreshing month in Isahaya, Japan, with an average temperature varying between 11.5°C (52.7°F) and 17.1°C (62.8°F). The onset of November is marked by a decrease in temperature, transitioning from an agreeable 22.6°C (72.7°F) in October to a refreshing 17.1°C (62.8°F). Weather in November »
Weather in December
The first month of the winter, December, is also a fresh month in Isahaya, Japan, with temperature in the range of an average high of 11.1°C (52°F) and an average low of 6.6°C (43.9°F). With December's arrival, Isahaya's weather changes as the average high-temperature falls from a comfortable 17.1°C (62.8°F) in November to a fresh 11.1°C (52°F). 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 is the coldest month in Isahaya?
With an average high-temperature of 9.4°C (48.9°F) and an average low-temperature of 4.4°C (39.9°F), January is the coldest month in Isahaya, Japan.
What is the driest month in Isahaya?
January is the month with the least rainfall. Rain falls for 9.4 days and accumulates 39mm (1.54") of precipitation.
How many days does it rain in Isahaya?
Throughout the year, there are 167.1 rainfall days, and 1341mm (52.8") of precipitation is accumulated.
When does it snow in Isahaya?
Months with snowfall are January, February and December.
What is the snowiest month in Isahaya?
The months with the most snowfall are January and February, with an average 3mm (0.12") of accumulated snow.
How many days does it snow in Isahaya?
In Isahaya, Japan, during the entire year, snow falls for 1.6 days and aggregates up to 7mm (0.28") of snow.
What is the month with the least sunshine in Isahaya?
January and December, with an average of 4.5h of sunshine, are months with the least sunshine.
What is the least humid month in Isahaya?
With an average relative humidity of 72%, March is the least humid month in Isahaya.
When it does not snow in Isahaya?
In Isahaya, Japan, snow does not fall in March through November.
When are the longest days in Isahaya?
The month with the longest days in Isahaya is June, with an average of 14h and 18min of daylight.
What is the most humid month in Isahaya?
With an average relative humidity of 85%, July is the most humid month in Isahaya.
What is the wettest month in Isahaya?
July is the month with the most rainfall in Isahaya, Japan. Rain falls for 22 days and accumulates 260mm (10.24") of precipitation.
What is the month with the highest UV index in Isahaya?
July is the month with the highest UV index in Isahaya, with an average maximum UV index of 7.
What are the warmest months in Isahaya?
August is the warmest month, with an average high-temperature of 30.7°C (87.3°F) and an average low-temperature of 24.3°C (75.7°F).
What month has the most sunshine in Isahaya?
With an average of 10.1h of sunshine, August has the most sunshine of the year in Isahaya, Japan.
What is the month with the shortest days in Isahaya?
With an average of 10h and 0min of daylight, December has the shortest days of the year in Isahaya, Japan.
Is there Daylight Saving Time (DST) in Isahaya?
Isahaya does not observe Daylight Saving Time (DST). JST timezone is used throughout the entire year.
What is the month with the lowest UV index in Isahaya?
The month with the lowest UV index in Isahaya, Japan, is December, with an average maximum UV index of 2.
Average temperature
Isahaya, Japan
The warmest month (with the highest average high temperature) is August (30.7°C).
The month with the lowest average high temperature is January (9.4°C).
The month with the highest average low temperature is August (24.3°C).
The coldest month (with the lowest average low temperature) is January (4.4°C).
Average pressure
Isahaya, Japan
- Average pressure in January:
1022.1mbar - Average pressure in February:
1020.9mbar - Average pressure in March:
1018.5mbar - Average pressure in April:
1015.3mbar - Average pressure in May:
1012mbar - Average pressure in June:
1008.1mbar
- Average pressure in July:
1008.5mbar - Average pressure in August:
1008.4mbar - Average pressure in September:
1011.8mbar - Average pressure in October:
1016.5mbar - Average pressure in November:
1020.2mbar - Average pressure in December:
1021.5mbar
The month with the highest atmospheric pressure is January (1022.1mbar).
The month with the lowest atmospheric pressure is June (1008.1mbar).
Average wind speed
Isahaya, Japan
- Average wind speed in January:
12.2km/h - Average wind speed in February:
12.2km/h - Average wind speed in March:
12.3km/h - Average wind speed in April:
11km/h - Average wind speed in May:
9.1km/h - Average wind speed in June:
8.3km/h
- Average wind speed in July:
9.9km/h - Average wind speed in August:
9km/h - Average wind speed in September:
9.7km/h - Average wind speed in October:
11.4km/h - Average wind speed in November:
10.6km/h - Average wind speed in December:
12.2km/h
The windiest month (with the highest average wind speed) is March (12.3km/h).
The calmest month (with the lowest average wind speed) is June (8.3km/h).
Average humidity
Isahaya, Japan
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is March (72%).
Average rainfall
Isahaya, Japan
- Average rainfall in January:
39mm - Average rainfall in February:
79mm - Average rainfall in March:
86mm - Average rainfall in April:
92mm - Average rainfall in May:
103mm - Average rainfall in June:
239mm
The wettest month (with the highest rainfall) is July (260mm).
The driest month (with the least rainfall) is January (39mm).
Average rainfall days
Isahaya, Japan
- Average rainfall days in January:
9.4 days - Average rainfall days in February:
11.5 days - Average rainfall days in March:
13.9 days - Average rainfall days in April:
13.7 days - Average rainfall days in May:
11.5 days - Average rainfall days in June:
19.7 days
- Average rainfall days in July:
22 days - Average rainfall days in August:
19.5 days - Average rainfall days in September:
15.1 days - Average rainfall days in October:
10.1 days - Average rainfall days in November:
10.4 days - Average rainfall days in December:
10.3 days
The month with the highest number of rainy days is July (22 days).
The month with the least rainy days is January (9.4 days).
Average snowfall
Isahaya, Japan
The months with the highest snowfall are January and February (3mm).
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0mm).
Average snowfall days
Isahaya, Japan
- Average snowfall days in January:
0.8 days - Average snowfall days in February:
0.5 days - Average snowfall days in March:
0 days - Average snowfall days in April:
0 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
0 days - Average snowfall days in December:
0.3 days
The month with the highest number of snowfall days is January (0.8 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).
Average daylight / Average sunshine
Isahaya, Japan
- Average daylight in January:
10h and 2min - Average daylight in February:
11h and 0min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 0min - Average daylight in May:
13h and 5min - Average daylight in June:
14h and 2min
- Average daylight in July:
14h and 1min - Average daylight in August:
13h and 2min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 2min - Average daylight in November:
10h and 3min - Average daylight in December:
10h and 0min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in January:
4h and 3min - Average sunshine in February:
5h and 4min - Average sunshine in March:
6h and 5min - Average sunshine in April:
8h and 2min - Average sunshine in May:
8h and 5min - Average sunshine in June:
7h and 2min
- Average sunshine in July:
8h and 2min - Average sunshine in August:
10h and 1min - Average sunshine in September:
8h and 1min - Average sunshine in October:
6h and 2min - Average sunshine in November:
5h and 3min - Average sunshine in December:
4h and 3min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The months with the least sunshine are January and December (Average sunshine: 4h and 30min).
Average sunshine days
Isahaya, Japan
- Average sunshine days in January:
19.8 days - Average sunshine days in February:
14.7 days - Average sunshine days in March:
15.3 days - Average sunshine days in April:
14.9 days - Average sunshine days in May:
18.3 days - Average sunshine days in June:
8.9 days
- Average sunshine days in July:
6.8 days - Average sunshine days in August:
9.8 days - Average sunshine days in September:
12.9 days - Average sunshine days in October:
19.3 days - Average sunshine days in November:
18 days - Average sunshine days in December:
19.6 days
The month with the most sunshine days is January (19.8 days).
The month with the least sunshine days is July (6.8 days).
Average UV index
Isahaya, Japan
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover
Isahaya, Japan
The month with the most cloud cover is June (Cloud cover 54).
The month with the least cloud cover is October (Cloud cover 34).
Average visibility
Isahaya, Japan
The months with the highest visibility are January, February, March, October, November and December (10km).
The months with the lowest visibility are June and July (8km).
