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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, like December, in Iwaki, Japan, is a wintry winter month, with an average temperature varying between -1.1°C (30°F) and 5.1°C (41.2°F). Iwaki, Japan, notes the coldest temperatures in January, with a high average of 5.1°C (41.2°F) and a low of -1.1°C (30°F). Weather in January »
Weather in February
February, the last month of the winter in Iwaki, is also an icy month, with temperature in the range of an average low of -0.9°C (30.4°F) and an average high of 5.6°C (42.1°F). The onset of February brings an average high-temperature of a still icy 5.6°C (42.1°F), nearly matching the January temperature. Weather in February »
Weather in March
March, the first month of the spring in Iwaki, is a chilly month, with an average temperature fluctuating between 9.5°C (49.1°F) and 2°C (35.6°F). As February gives way to March, the average high-temperature displays a slight ascent, adjusting from a wintry 5.6°C (42.1°F) to a chilly 9.5°C (49.1°F). Weather in March »
Weather in April
April in Iwaki, Japan, is a moderate spring month, with temperature in the range of an average high of 14.2°C (57.6°F) and an average low of 6.3°C (43.3°F). The shift from March to April introduces a subtle increase in the average high-temperature, moving from a chilly 9.5°C (49.1°F) to a mild 14.2°C (57.6°F). Weather in April »
Weather in May
The last month of the spring, May, is a comfortable month in Iwaki, Japan, with an average temperature fluctuating between 19.7°C (67.5°F) and 11.7°C (53.1°F). In May, the average high-temperature increases from a mild 14.2°C (57.6°F) in April to a comfortable 19.7°C (67.5°F). Weather in May »
Weather in June
June, the first month of the summer in Iwaki, is a pleasant month, with temperature in the range of an average high of 22.2°C (72°F) and an average low of 15.2°C (59.4°F). The advent of June sees the average high-temperature at an agreeable 22.2°C (72°F), subtly shifted from May's 19.7°C (67.5°F). Weather in June »
Weather in July
July in Iwaki, Japan, is a warm summer month, with an average temperature fluctuating between 26°C (78.8°F) and 19.5°C (67.1°F). Iwaki observes a slight uplift in the average high-temperature with the onset of July, adjusting from June's pleasant 22.2°C (72°F) to a warm 26°C (78.8°F). Weather in July »
Weather in August
August, the last month of the summer in Iwaki, is another warm month, with an average temperature varying between 20.8°C (69.4°F) and 27.5°C (81.5°F). August, recognised by an average high temperature of 27.5°C (81.5°F) and a low of 20.8°C (69.4°F), is Iwaki's warmest month. August's average heat index is computed to be a hot 31°C (87.8°F). Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Iwaki, Japan, with temperature in the range of an average low of 17.5°C (63.5°F) and an average high of 23.8°C (74.8°F). The arrival of September suggests a slight decrease in the average high-temperature, moving from 27.5°C (81.5°F) in August to a still moderately hot 23.8°C (74.8°F). Weather in September »
Weather in October
October, like September, in Iwaki, Japan, is another enjoyable autumn month, with an average temperature ranging between max 18.5°C (65.3°F) and min 12.3°C (54.1°F). A moderate decline in the average high-temperature is seen during October, decreasing from a moderately hot 23.8°C (74.8°F) in September to an enjoyable 18.5°C (65.3°F). Weather in October »
Weather in November
November, the last month of the autumn in Iwaki, is another refreshing month, with an average temperature ranging between max 13.3°C (55.9°F) and min 6.8°C (44.2°F). A shift in the average high-temperature occurs in November, reducing from an enjoyable 18.5°C (65.3°F) in October to a still refreshing 13.3°C (55.9°F). Weather in November »
Weather in December
The first month of the winter, December, is also a frosty month in Iwaki, Japan, with an average temperature ranging between min 2.1°C (35.8°F) and max 7.8°C (46°F). With December's onset, the weather shows a temperature decrease, transitioning from a refreshing 13.3°C (55.9°F) in November to a chilly 7.8°C (46°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 are the coldest months in Iwaki?
January is the month when Iwaki experiences its coldest temperatures, averaging a high of 5.1°C (41.2°F) and a low of -1.1°C (30°F).
What is the least humid month in Iwaki?
With an average relative humidity of 70%, January is the least humid month.
What is the driest month in Iwaki?
The months with the least rainfall in Iwaki are January and February Rain falls for 12.1 days and accumulates 45mm (1.77") of rain.
How much does it rain in Iwaki?
In Iwaki, during the entire year, the rain falls for 195.5 days and collects up to 1085mm (42.72") of precipitation.
When does it snow in Iwaki?
January through March, November and December are months with snowfall in Iwaki.
How much does it snow in Iwaki?
Throughout the year, there are 17.8 snowfall days, and 159mm (6.26") of snow is accumulated.
What is the month with the lowest UV index in Iwaki?
The months with the lowest UV index in Iwaki, Japan, are January through March and December, with an average maximum UV index of 2.
What is the snowiest month in Iwaki?
The month with the most snowfall in Iwaki is February, when snow falls for 6.3 days and typically aggregates up to 67mm (2.64") of snow.
What is the month with the least sunshine in Iwaki?
With an average of 5.8h of sunshine, February has the least sunshine of the year in Iwaki.
When it does not snow in Iwaki?
In Iwaki, Japan, snow does not fall in April through October.
When are the longest days in Iwaki?
The month with the longest days is June, with an average of 14h and 42min of daylight.
What is the most humid month in Iwaki?
The most humid month is July, with an average relative humidity of 86%.
When is the highest UV index in Iwaki?
July and August, with an average maximum UV index of 6, are months with the highest UV index in Iwaki, Japan.
What month is the hottest in Iwaki?
The warmest period in Iwaki, Japan, tends to be August, when average temperatures fluctuate between a high of 27.5°C (81.5°F) and a low of 20.8°C (69.4°F).
What month has the most sunshine in Iwaki?
With an average of 9.4h of sunshine, August has the most sunshine of the year.
What is the wettest month in Iwaki?
October is the month with the most rainfall in Iwaki, Japan. Rain falls for 16.3 days and accumulates 152mm (5.98") of precipitation.
What is the month with the shortest days in Iwaki?
The month with the shortest days in Iwaki, Japan, is December, with an average of 9h and 42min of daylight.
Is there Daylight Saving Time (DST) in Iwaki?
Iwaki, Japan, does not observe Daylight Saving Time (DST). JST timezone is used throughout the entire year.
Average temperature
Iwaki, Japan
The warmest month (with the highest average high temperature) is August (27.5°C).
The month with the lowest average high temperature is January (5.1°C).
The month with the highest average low temperature is August (20.8°C).
The coldest month (with the lowest average low temperature) is January (-1.1°C).
Average pressure
Iwaki, Japan
- Average pressure in January:
1016.2mbar - Average pressure in February:
1017.6mbar - Average pressure in March:
1015.9mbar - Average pressure in April:
1014.6mbar - Average pressure in May:
1012.1mbar - Average pressure in June:
1009.4mbar
- Average pressure in July:
1009.6mbar - Average pressure in August:
1010.2mbar - Average pressure in September:
1014mbar - Average pressure in October:
1017.3mbar - Average pressure in November:
1018.5mbar - Average pressure in December:
1016.3mbar
The month with the highest atmospheric pressure is November (1018.5mbar).
The month with the lowest atmospheric pressure is June (1009.4mbar).
Average wind speed
Iwaki, Japan
- Average wind speed in January:
16.5km/h - Average wind speed in February:
16.2km/h - Average wind speed in March:
15.3km/h - Average wind speed in April:
14.3km/h - Average wind speed in May:
12.1km/h - Average wind speed in June:
10.2km/h
- Average wind speed in July:
9.4km/h - Average wind speed in August:
9.6km/h - Average wind speed in September:
10.7km/h - Average wind speed in October:
12.4km/h - Average wind speed in November:
12.9km/h - Average wind speed in December:
15.8km/h
The windiest month (with the highest average wind speed) is January (16.5km/h).
The calmest month (with the lowest average wind speed) is July (9.4km/h).
Average humidity
Iwaki, Japan
The month with the highest relative humidity is July (86%).
The month with the lowest relative humidity is January (70%).
Average rainfall
Iwaki, Japan
- Average rainfall in January:
45mm - Average rainfall in February:
45mm - Average rainfall in March:
93mm - Average rainfall in April:
103mm - Average rainfall in May:
97mm - Average rainfall in June:
100mm
The wettest month (with the highest rainfall) is October (152mm).
The driest months (with the least rainfall) are January and February (45mm).
Average rainfall days
Iwaki, Japan
- Average rainfall days in January:
12.1 days - Average rainfall days in February:
10.8 days - Average rainfall days in March:
17.3 days - Average rainfall days in April:
15.7 days - Average rainfall days in May:
15.5 days - Average rainfall days in June:
20.1 days
- Average rainfall days in July:
23.9 days - Average rainfall days in August:
21.8 days - Average rainfall days in September:
16.4 days - Average rainfall days in October:
16.3 days - Average rainfall days in November:
12.1 days - Average rainfall days in December:
13.5 days
The month with the highest number of rainy days is July (23.9 days).
The month with the least rainy days is February (10.8 days).
Average snowfall
Iwaki, Japan
The month with the highest snowfall is February (67mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days
Iwaki, Japan
- Average snowfall days in January:
6.4 days - Average snowfall days in February:
6.3 days - Average snowfall days in March:
2.6 days - Average snowfall days in April:
0.1 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:
0.1 days - Average snowfall days in December:
2.3 days
The month with the highest number of snowfall days is January (6.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Iwaki, Japan
- Average daylight in January:
9h and 5min - Average daylight in February:
10h and 5min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 1min - Average daylight in May:
14h and 1min - Average daylight in June:
14h and 4min
- Average daylight in July:
14h and 2min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 2min - Average daylight in November:
10h and 1min - Average daylight in December:
9h and 4min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in January:
6h and 1min - Average sunshine in February:
5h and 5min - Average sunshine in March:
6h and 5min - Average sunshine in April:
8h and 5min - Average sunshine in May:
9h and 2min - Average sunshine in June:
8h and 3min
- Average sunshine in July:
8h and 3min - Average sunshine in August:
9h and 2min - Average sunshine in September:
7h and 4min - Average sunshine in October:
7h and 1min - Average sunshine in November:
5h and 5min - Average sunshine in December:
6h and 0min
The month with the most sunshine is August (Average sunshine: 9h and 24min).
The month with the least sunshine is February (Average sunshine: 5h and 48min).
Average sunshine days
Iwaki, Japan
- Average sunshine days in January:
15 days - Average sunshine days in February:
12.8 days - Average sunshine days in March:
10.8 days - Average sunshine days in April:
11.2 days - Average sunshine days in May:
12.5 days - Average sunshine days in June:
6.9 days
- Average sunshine days in July:
3.8 days - Average sunshine days in August:
5.3 days - Average sunshine days in September:
9.6 days - Average sunshine days in October:
12.1 days - Average sunshine days in November:
15.4 days - Average sunshine days in December:
13.6 days
The month with the most sunshine days is November (15.4 days).
The month with the least sunshine days is July (3.8 days).
Average UV index
Iwaki, Japan
The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January, February, March and December (UV index 2).
Average cloud cover
Iwaki, Japan
The month with the most cloud cover is July (Cloud cover 49).
The month with the least cloud cover is January (Cloud cover 33).
Average visibility
Iwaki, Japan
The months with the highest visibility are November and December (10km).
The month with the lowest visibility is July (8km).
