Climate and monthly weather forecastIruma, Japan
Climate and monthly weather forecast
Weather in January
January, the same as December, in Iruma, Japan, is another chilly winter month, with an average temperature varying between 1.4°C (34.5°F) and 8.4°C (47.1°F). The coldest time of the year is January, with temperatures averaging a high of 8.4°C (47.1°F) and a low of 1.4°C (34.5°F). Weather in January »Weather in February
February, the last month of the winter in Iruma, is another chilly month, with an average temperature varying between 9.3°C (48.7°F) and 2°C (35.6°F). The transition into February marks the average high-temperature at a still chilly 9.3°C (48.7°F), differing minimally from January's 8.4°C (47.1°F). Weather in February »Weather in March
March, the first month of the spring in Iruma, is a mild month, with an average temperature ranging between min 5°C (41°F) and max 13.1°C (55.6°F). The embrace of March brings a minor uplift in the average high-temperature, shifting from a chilly 9.3°C (48.7°F) in February to a moderate 13.1°C (55.6°F). Weather in March »Weather in April
April is a refreshing spring month in Iruma, Japan, with an average temperature varying between 9.3°C (48.7°F) and 18°C (64.4°F). As Iruma welcomes April, the average high-temperature sees a modest rise, transitioning from a moderate 13.1°C (55.6°F) in March to a still refreshing 18°C (64.4°F). Weather in April »Weather in May
May, the last month of the spring in Iruma, is a warm month, with an average temperature fluctuating between 23.9°C (75°F) and 15.3°C (59.5°F). Iruma's transition into May brings a rise in the average high-temperature, moving from a comfortable 18°C (64.4°F) in April to a moderately hot 23.9°C (75°F). Weather in May »Weather in June
June, the first month of the summer in Iruma, is also a moderately hot month, with an average temperature fluctuating between 18.9°C (66°F) and 26.1°C (79°F). Iruma observes a minor difference in average high-temperatures between May's 23.9°C (75°F) and June's 26.1°C (79°F). Weather in June »Weather in July
July is a hot summer month in Iruma, Japan, with temperature in the range of an average high of 30.4°C (86.7°F) and an average low of 23.1°C (73.6°F). Iruma perceives a slight temperature ascent during July, with average high-temperatures adjusting from a warm 26.1°C (79°F) in June to a hot 30.4°C (86.7°F). Weather in July »Weather in August
The last month of the summer, August, is also a hot month in Iruma, Japan, with an average temperature fluctuating between 24.7°C (76.5°F) and 32°C (89.6°F). Iruma, Japan, witnesses the warmest weather in August, with temperatures averaging a high of 32°C (89.6°F) and a low of 24.7°C (76.5°F). The heat index value during August is evaluated at an extremely hot 40°C (104°F). Weather in August »Weather in September
The first month of the autumn, September, is still a warm month in Iruma, Japan, with an average temperature varying between 20.5°C (68.9°F) and 27.4°C (81.3°F). Transitioning from August to September involves a subtle drop in average high-temperatures, descending from a hot 32°C (89.6°F) to a moderately hot 27.4°C (81.3°F). Weather in September »Weather in October
October, the same as September, in Iruma, Japan, is an agreeable autumn month, with temperature in the range of an average low of 15.2°C (59.4°F) and an average high of 21.5°C (70.7°F). The onset of October coincides with a reduction in the average high-temperature, falling from a moderately hot 27.4°C (81.3°F) in September to an agreeable 21.5°C (70.7°F). Weather in October »Weather in November
The last month of the autumn, November, is another refreshing month in Iruma, Japan, with an average temperature ranging between min 9.5°C (49.1°F) and max 15.8°C (60.4°F). November brings a decrease in the average high-temperature, falling from October's agreeable 21.5°C (70.7°F) to a mild 15.8°C (60.4°F). Weather in November »Weather in December
December, the first month of the winter in Iruma, is still a cool month, with an average temperature varying between 10.5°C (50.9°F) and 4.3°C (39.7°F). The onset of December is marked by a decrease in temperature, transitioning from a moderate 15.8°C (60.4°F) in November to a cool 10.5°C (50.9°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
January, with its average high-temperature of 8.4°C (47.1°F) and an average low-temperature of 1.4°C (34.5°F), holds the record as the coldest month in Iruma, Japan.
With an average relative humidity of 58%, January is the least humid month in Iruma.
Throughout the year, in Iruma, Japan, there are 146.2 rainfall days, and 669mm (26.34") of precipitation is accumulated.
Months with snowfall are January through March and November.
Throughout the year, in Iruma, there are 3.7 snowfall days, and 62mm (2.44") of snow is accumulated.
The month with the lowest UV index is January, with an average maximum UV index of 2.
The month with the most snowfall is February, when snow falls for 2.1 days and typically aggregates up to 39mm (1.54") of snow.
February and November, with an average of 6.2h of sunshine, are months with the least sunshine in Iruma.
In Iruma, snow does not fall in April through October and December.
The months with the highest humidity in Iruma are June and July, with an average relative humidity of 73%.
June has the longest days of the year in Iruma, Japan, with an average of 14h and 30min of daylight.
July is the month with the highest UV index in Iruma, with an average maximum UV index of 7.
August tends to be the warmest month in Iruma, with temperatures averaging a daily high of 32°C (89.6°F) and a low of 24.7°C (76.5°F).
The month with the most sunshine in Iruma is August, with an average of 9.8h of sunshine.
The month with the most rainfall in Iruma, Japan, is October, when the rain falls for 15.3 days and typically aggregates up to 102mm (4.02") of precipitation.
The month with the least rainfall is December, when the rain falls for 5.8 days and typically collects 21mm (0.83") of precipitation.
The month with the shortest days in Iruma, Japan, is December, with an average of 9h and 48min of daylight.
Iruma does not observe Daylight Saving Time (DST). JST timezone is used over the entire year.
Average temperature
Iruma, Japan
The warmest month (with the highest average high temperature) is August (32°C).
The month with the lowest average high temperature is January (8.4°C).
The month with the highest average low temperature is August (24.7°C).
The coldest month (with the lowest average low temperature) is January (1.4°C).
Average pressure
Iruma, Japan
- Average pressure in January:
1016.6mbar - Average pressure in February:
1017.5mbar - Average pressure in March:
1015.7mbar - Average pressure in April:
1014.3mbar - Average pressure in May:
1012mbar - Average pressure in June:
1009.2mbar
- Average pressure in July:
1009.8mbar - Average pressure in August:
1010.3mbar - Average pressure in September:
1013.7mbar - Average pressure in October:
1016.8mbar - Average pressure in November:
1018.4mbar - Average pressure in December:
1016.6mbar
The month with the highest atmospheric pressure is November (1018.4mbar).
The month with the lowest atmospheric pressure is June (1009.2mbar).
Average wind speed
Iruma, Japan
- Average wind speed in January:
11.2km/h - Average wind speed in February:
11.3km/h - Average wind speed in March:
11.4km/h - Average wind speed in April:
11.5km/h - Average wind speed in May:
10.4km/h - Average wind speed in June:
9.4km/h
- Average wind speed in July:
8.7km/h - Average wind speed in August:
8.8km/h - Average wind speed in September:
9km/h - Average wind speed in October:
9.9km/h - Average wind speed in November:
8.9km/h - Average wind speed in December:
10.3km/h
The windiest month (with the highest average wind speed) is April (11.5km/h).
The calmest month (with the lowest average wind speed) is July (8.7km/h).
Average humidity
Iruma, Japan
The months with the highest relative humidity are June and July (73%).
The month with the lowest relative humidity is January (58%).
Average rainfall
Iruma, Japan
The wettest month (with the highest rainfall) is October (102mm).
The driest month (with the least rainfall) is December (21mm).
Average rainfall days
Iruma, Japan
- Average rainfall days in January:
4.8 days - Average rainfall days in February:
6.7 days - Average rainfall days in March:
11.7 days - Average rainfall days in April:
13.2 days - Average rainfall days in May:
13.3 days - Average rainfall days in June:
18.5 days
- Average rainfall days in July:
16.8 days - Average rainfall days in August:
16.3 days - Average rainfall days in September:
14.7 days - Average rainfall days in October:
15.3 days - Average rainfall days in November:
9.1 days - Average rainfall days in December:
5.8 days
The month with the highest number of rainy days is June (18.5 days).
The month with the least rainy days is January (4.8 days).
Average snowfall
Iruma, Japan
The month with the highest snowfall is February (39mm).
The months with the least snowfall are April, May, June, July, August, September, October and December (0mm).
Average snowfall days
Iruma, Japan
- Average snowfall days in January:
1 days - Average snowfall days in February:
2.1 days - Average snowfall days in March:
0.5 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:
0.1 days - Average snowfall days in December:
0 days
The month with the highest number of snowfall days is February (2.1 days).
The months with the least snowfall days are April, May, June, July, August, September, October and December (0 days).
Average daylight / Average sunshine
Iruma, Japan
- Average daylight in January:
10h and 0min - Average daylight in February:
10h and 54min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 6min - Average daylight in May:
14h and 6min - Average daylight in June:
14h and 30min
- Average daylight in July:
14h and 18min - Average daylight in August:
13h and 30min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 18min - Average daylight in November:
10h and 18min - Average daylight in December:
9h and 48min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in January:
6h and 42min - Average sunshine in February:
6h and 12min - Average sunshine in March:
7h and 0min - Average sunshine in April:
9h and 12min - Average sunshine in May:
9h and 30min - Average sunshine in June:
8h and 42min
- Average sunshine in July:
9h and 12min - Average sunshine in August:
9h and 48min - Average sunshine in September:
7h and 42min - Average sunshine in October:
6h and 42min - Average sunshine in November:
6h and 12min - Average sunshine in December:
6h and 30min
The month with the most sunshine is August (Average sunshine: 9h and 48min).
The months with the least sunshine are February and November (Average sunshine: 6h and 12min).
Average sunshine days
Iruma, Japan
- Average sunshine days in January:
25.3 days - Average sunshine days in February:
18.7 days - Average sunshine days in March:
18 days - Average sunshine days in April:
15.1 days - Average sunshine days in May:
15.8 days - Average sunshine days in June:
9.1 days
- Average sunshine days in July:
9.9 days - Average sunshine days in August:
11.3 days - Average sunshine days in September:
11.7 days - Average sunshine days in October:
14.1 days - Average sunshine days in November:
19.2 days - Average sunshine days in December:
24.5 days
The month with the most sunshine days is January (25.3 days).
The month with the least sunshine days is June (9.1 days).
Average UV index
Iruma, Japan
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is January (UV index 2).
Average cloud cover
Iruma, Japan
The month with the most cloud cover is June (Cloud cover 45).
The month with the least cloud cover is January (Cloud cover 26).
Average visibility
Iruma, Japan
The months with the highest visibility are January, February, March, April, May, November and December (10km).
The months with the lowest visibility are June, July, August, September and October (9km).
