Climate and monthly weather forecastIwai, Japan
Climate and monthly weather forecast
Weather in January
January, the same as December, in Iwai, Japan, is a frosty winter month, with an average temperature varying between 8.3°C (46.9°F) and 1.7°C (35.1°F). January, noted for its average high-temperature of 8.3°C (46.9°F) and an average low-temperature of 1.7°C (35.1°F), is considered the coldest month. Weather in January »Weather in February
The last month of the winter, February, is another chilly month in Iwai, Japan, with an average temperature ranging between max 9.3°C (48.7°F) and min 2.3°C (36.1°F). The advent of February brings an average high-temperature of a still chilly 9.3°C (48.7°F), exhibiting minor difference from the previous month. Weather in February »Weather in March
March, the first month of the spring in Iwai, is a mild month, with an average temperature fluctuating between 13.3°C (55.9°F) and 5.2°C (41.4°F). With the onset of March, Iwai observes a minor temperature ascent, with the average high-temperature adjusting from February's frosty 9.3°C (48.7°F) to a mild 13.3°C (55.9°F). Weather in March »Weather in April
April is a comfortable spring month in Iwai, Japan, with an average temperature varying between 9.8°C (49.6°F) and 18.2°C (64.8°F). With the onset of April, Iwai's average high-temperature experiences a slight rise, moving from March's mild 13.3°C (55.9°F) to an enjoyable 18.2°C (64.8°F). Weather in April »Weather in May
The last month of the spring, May, is a warm month in Iwai, Japan, with temperature in the range of an average high of 23.9°C (75°F) and an average low of 15.4°C (59.7°F). In Iwai, the average high-temperature in May rises, from a refreshing 18.2°C (64.8°F) in April, to a moderately hot 23.9°C (75°F). Weather in May »Weather in June
The first month of the summer, June, is still a warm month in Iwai, Japan, with temperature in the range of an average low of 18.8°C (65.8°F) and an average high of 26.1°C (79°F). Iwai commences June with an average high-temperature of a still moderately hot 26.1°C (79°F), maintaining a close resemblance to the previous month. Weather in June »Weather in July
July is a tropical summer month in Iwai, Japan, with an average temperature ranging between min 23°C (73.4°F) and max 30.2°C (86.4°F). As July arrives, a slight rise in the average high-temperature is observed, moving from a warm 26.1°C (79°F) in June to a tropical 30.2°C (86.4°F). Weather in July »Weather in August
August, the last month of the summer in Iwai, is another tropical month, with an average temperature varying between 31.9°C (89.4°F) and 24.4°C (75.9°F). The month of August sees the highest average temperatures, reaching 31.9°C (89.4°F) at the peak and 24.4°C (75.9°F) at the low. The heat index in August is evaluated at a scorching 41°C (105.8°F). Weather in August »Weather in September
September, the first month of the autumn in Iwai, is still a warm month, with an average temperature varying between 27.2°C (81°F) and 20.5°C (68.9°F). September marks a gentle change in average high-temperature, declining from August's tropical 31.9°C (89.4°F) to a moderately hot 27.2°C (81°F). Weather in September »Weather in October
October, like September, is an agreeable autumn month in Iwai, Japan, with an average temperature fluctuating between 21.6°C (70.9°F) and 15.4°C (59.7°F). October ushers in a slight temperature change, with average high-temperatures reducing from September's moderately hot 27.2°C (81°F) to an agreeable 21.6°C (70.9°F). Weather in October »Weather in November
The last month of the autumn, November, is also an enjoyable month in Iwai, Japan, with temperature in the range of an average high of 16°C (60.8°F) and an average low of 9.7°C (49.5°F). Start of November brings a shift in the average high-temperature, falling from October's agreeable 21.6°C (70.9°F) to a refreshing 16°C (60.8°F). Weather in November »Weather in December
The first month of the winter, December, is still a cool month in Iwai, Japan, with temperature in the range of an average high of 10.5°C (50.9°F) and an average low of 4.3°C (39.7°F). The transition into December indicates a reduction in the average high-temperature, down to a fresh 10.5°C (50.9°F) from November's refreshing 16°C (60.8°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
Iwai's coldest weather arrives in January, when temperatures average a high of 8.3°C (46.9°F) and a low of 1.7°C (35.1°F).
With an average relative humidity of 60%, January is the least humid month.
Throughout the year, there are 161.3 rainfall days, and 876mm (34.49") of precipitation is accumulated.
January through March are months with snowfall in Iwai.
Throughout the year, there are 3.3 snowfall days, and 51mm (2.01") of snow is accumulated.
The months with the lowest UV index in Iwai, Japan, are January and December, with an average maximum UV index of 2.
February is the month with the most snowfall in Iwai. Snow falls for 2 days and accumulates 36mm (1.42") of snow.
February has the least sunshine of the year in Iwai, Japan, with an average of 5.7h of sunshine.
In Iwai, snow does not fall in April through December.
June and July, with an average relative humidity of 76%, are most humid months in Iwai.
With an average of 14h and 36min of daylight, June has the longest days of the year.
The month with the highest UV index in Iwai, Japan, is July, with an average maximum UV index of 7.
Iwai records the warmest temperatures in August, averaging a high of 31.9°C (89.4°F) and a low of 24.4°C (75.9°F).
The month with the most sunshine in Iwai is August, with an average of 9.7h of sunshine.
The month with the most rainfall in Iwai is October, when the rain falls for 15.5 days and typically aggregates up to 122mm (4.8") of precipitation.
December is the month with the least rainfall in Iwai, Japan. Rain falls for 7.8 days and accumulates 31mm (1.22") of precipitation.
December has the shortest days of the year in Iwai, Japan, with an average of 9h and 48min of daylight.
Iwai, Japan, does not observe Daylight Saving Time (DST). JST timezone is used over the entire year.
Average temperature
Iwai, Japan
The warmest month (with the highest average high temperature) is August (31.9°C).
The month with the lowest average high temperature is January (8.3°C).
The month with the highest average low temperature is August (24.4°C).
The coldest month (with the lowest average low temperature) is January (1.7°C).
Average pressure
Iwai, Japan
- Average pressure in January:
1016.2mbar - Average pressure in February:
1017.3mbar - Average pressure in March:
1015.6mbar - 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:
1013.6mbar - Average pressure in October:
1016.8mbar - Average pressure in November:
1018.2mbar - Average pressure in December:
1016.3mbar
The month with the highest atmospheric pressure is November (1018.2mbar).
The month with the lowest atmospheric pressure is June (1009.2mbar).
Average wind speed
Iwai, Japan
- Average wind speed in January:
11.5km/h - Average wind speed in February:
11.5km/h - Average wind speed in March:
11.9km/h - Average wind speed in April:
12.3km/h - Average wind speed in May:
11.1km/h - Average wind speed in June:
10.1km/h
- Average wind speed in July:
10.2km/h - Average wind speed in August:
10km/h - Average wind speed in September:
9.9km/h - Average wind speed in October:
10.6km/h - Average wind speed in November:
9.1km/h - Average wind speed in December:
10.5km/h
The windiest month (with the highest average wind speed) is April (12.3km/h).
The calmest month (with the lowest average wind speed) is November (9.1km/h).
Average humidity
Iwai, Japan
The months with the highest relative humidity are June and July (76%).
The month with the lowest relative humidity is January (60%).
Average rainfall
Iwai, Japan
The wettest month (with the highest rainfall) is October (122mm).
The driest month (with the least rainfall) is December (31mm).
Average rainfall days
Iwai, Japan
- Average rainfall days in January:
6.3 days - Average rainfall days in February:
8.6 days - Average rainfall days in March:
14.2 days - Average rainfall days in April:
14.9 days - Average rainfall days in May:
13.5 days - Average rainfall days in June:
18.3 days
- Average rainfall days in July:
18.7 days - Average rainfall days in August:
16.4 days - Average rainfall days in September:
16.5 days - Average rainfall days in October:
15.5 days - Average rainfall days in November:
10.6 days - Average rainfall days in December:
7.8 days
The month with the highest number of rainy days is July (18.7 days).
The month with the least rainy days is January (6.3 days).
Average snowfall
Iwai, Japan
The month with the highest snowfall is February (36mm).
The months with the least snowfall are April, May, June, July, August, September, October, November and December (0mm).
Average snowfall days
Iwai, Japan
- Average snowfall days in January:
1 days - Average snowfall days in February:
2 days - Average snowfall days in March:
0.3 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 days
The month with the highest number of snowfall days is February (2 days).
The months with the least snowfall days are April, May, June, July, August, September, October, November and December (0 days).
Average daylight / Average sunshine
Iwai, 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 36min
- 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 36min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in January:
6h and 24min - Average sunshine in February:
5h and 42min - Average sunshine in March:
6h and 36min - Average sunshine in April:
8h and 42min - Average sunshine in May:
9h and 0min - Average sunshine in June:
8h and 6min
- Average sunshine in July:
8h and 42min - Average sunshine in August:
9h and 42min - Average sunshine in September:
7h and 24min - Average sunshine in October:
6h and 30min - Average sunshine in November:
5h and 48min - Average sunshine in December:
6h and 6min
The month with the most sunshine is August (Average sunshine: 9h and 42min).
The month with the least sunshine is February (Average sunshine: 5h and 42min).
Average sunshine days
Iwai, Japan
- Average sunshine days in January:
23.3 days - Average sunshine days in February:
17.6 days - Average sunshine days in March:
15.4 days - Average sunshine days in April:
13.5 days - Average sunshine days in May:
15.8 days - Average sunshine days in June:
9.7 days
- Average sunshine days in July:
10.3 days - Average sunshine days in August:
11.8 days - Average sunshine days in September:
10.8 days - Average sunshine days in October:
13.7 days - Average sunshine days in November:
18.5 days - Average sunshine days in December:
21.9 days
The month with the most sunshine days is January (23.3 days).
The month with the least sunshine days is June (9.7 days).
Average UV index
Iwai, Japan
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover
Iwai, Japan
The month with the most cloud cover is June (Cloud cover 49).
The month with the least cloud cover is January (Cloud cover 29).
Average visibility
Iwai, Japan
The months with the highest visibility are January, February, March, November and December (10km).
The months with the lowest visibility are April, May, June, July, August, September and October (9km).
