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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 Iwanuma, Japan, is another cold winter month, with temperature in the range of an average high of 3.6°C (38.5°F) and an average low of -1.1°C (30°F). January, with its average high-temperature of 3.6°C (38.5°F) and an average low-temperature of -1.1°C (30°F), holds the record as the coldest month. Weather in January »
Weather in February
February, the last month of the winter in Iwanuma, is another cold month, with temperature in the range of an average high of 4.2°C (39.6°F) and an average low of -1.2°C (29.8°F). The onset of February notes an average high-temperature of a still icy 4.2°C (39.6°F), subtly shifted from January's 3.6°C (38.5°F). Weather in February »
Weather in March
March, the first month of the spring in Iwanuma, is a chilly month, with temperature in the range of an average low of 1.8°C (35.2°F) and an average high of 8.3°C (46.9°F). A gentle upsurge in temperatures occurs as February gives way to March, with average highs shifting from an icy 4.2°C (39.6°F) to a chilly 8.3°C (46.9°F). Weather in March »
Weather in April
April is a refreshing spring month in Iwanuma, Japan, with an average temperature ranging between max 13.5°C (56.3°F) and min 6.2°C (43.2°F). The commencement of April sees a shift in the average high-temperature, moving from a frosty 8.3°C (46.9°F) in March to a mild 13.5°C (56.3°F). Weather in April »
Weather in May
The last month of the spring, May, is a refreshing month in Iwanuma, Japan, with temperature in the range of an average low of 11.8°C (53.2°F) and an average high of 19.5°C (67.1°F). May brings a rise in the average high-temperature, transitioning from April's refreshing 13.5°C (56.3°F) to an enjoyable 19.5°C (67.1°F). Weather in May »
Weather in June
June, the first month of the summer in Iwanuma, is an agreeable month, with an average temperature ranging between max 22.6°C (72.7°F) and min 15.7°C (60.3°F). Iwanuma's weather in June presents a minor rise in the average high-temperature, moving from a comfortable 19.5°C (67.1°F) in May to a pleasant 22.6°C (72.7°F). Weather in June »
Weather in July
July is a warm summer month in Iwanuma, Japan, with an average temperature ranging between max 26.2°C (79.2°F) and min 19.9°C (67.8°F). Iwanuma's weather shows a minor temperature rise with the arrival of July, moving from an agreeable 22.6°C (72.7°F) in June to a warm 26.2°C (79.2°F). Weather in July »
Weather in August
The last month of the summer, August, is another warm month in Iwanuma, Japan, with an average temperature varying between 27.6°C (81.7°F) and 21.5°C (70.7°F). August temperatures tend to peak at an average high of 27.6°C (81.7°F) and dip to a low of 21.5°C (70.7°F). During August, the heat index is calculated to be a tropical 31°C (87.8°F). Weather in August »
Weather in September
September, the first month of the autumn in Iwanuma, is still a warm month, with an average temperature fluctuating between 17.8°C (64°F) and 23.8°C (74.8°F). September brings a minor shift in the average high-temperature, adjusting from a moderately hot 27.6°C (81.7°F) in August to a still warm 23.8°C (74.8°F). Weather in September »
Weather in October
October, like September, in Iwanuma, Japan, is another refreshing autumn month, with an average temperature ranging between min 12.5°C (54.5°F) and max 18.5°C (65.3°F). October suggests a modest reduction in the average high-temperature, shifting from a warm 23.8°C (74.8°F) in September to a comfortable 18.5°C (65.3°F). Weather in October »
Weather in November
November, the last month of the autumn in Iwanuma, is another cool month, with an average temperature ranging between min 7.1°C (44.8°F) and max 12.5°C (54.5°F). November brings a minor decrease, with the average high-temperature reducing from a refreshing 18.5°C (65.3°F) in October to a fresh 12.5°C (54.5°F). Weather in November »
Weather in December
The first month of the winter, December, is also a frosty month in Iwanuma, Japan, with an average temperature varying between 6.6°C (43.9°F) and 1.9°C (35.4°F). December's arrival corresponds with a decrease in average high-temperatures, from November's fresh 12.5°C (54.5°F) to a frosty 6.6°C (43.9°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
What is the coldest month in Iwanuma?
In Iwanuma, Japan, the average lowest temperatures are observed in January, with a high of 3.6°C (38.5°F) and a low of -1.1°C (30°F).
How much does it rain in Iwanuma?
Throughout the year, in Iwanuma, there are 141.6 rainfall days, and 753mm (29.65") of precipitation is accumulated.
When does it snow in Iwanuma?
January through April and December are months with snowfall.
When does it snow the most in Iwanuma?
The month with the most snowfall is January, when snow falls for 7 days and typically aggregates up to 67mm (2.64") of snow.
How much does it snow in Iwanuma?
Throughout the year, in Iwanuma, there are 19.2 snowfall days, and 203mm (7.99") of snow is accumulated.
What is the month with the least sunshine in Iwanuma?
The months with the least sunshine are January and February, with an average of 5.1h of sunshine.
What is the month with the lowest UV index in Iwanuma?
January through March and December, with an average maximum UV index of 2, are months with the lowest UV index in Iwanuma.
What is the driest month in Iwanuma?
The month with the least rainfall is February, when the rain falls for 6.1 days and typically collects 22mm (0.87") of precipitation.
What is the least humid month in Iwanuma?
With an average relative humidity of 72%, April is the least humid month in Iwanuma.
When it does not snow in Iwanuma?
In Iwanuma, snow does not fall in May through November.
What month has the most sunshine in Iwanuma?
May has the most sunshine of the year, with an average of 9.6h of sunshine.
When are the longest days in Iwanuma?
The month with the longest days in Iwanuma is June, with an average of 14h and 48min of daylight.
What is the most humid month in Iwanuma?
July is the most humid month in Iwanuma, Japan, with an average relative humidity of 84%.
What is the wettest month in Iwanuma?
July is the month with the most rainfall. Rain falls for 19.6 days and accumulates 118mm (4.65") of precipitation.
What are the months with the highest UV index in Iwanuma?
July and August, with an average maximum UV index of 6, are months with the highest UV index in Iwanuma, Japan.
What is the hottest time of year in Iwanuma?
In Iwanuma, August records the average highest temperatures, peaking at 27.6°C (81.7°F) and reaching a low of 21.5°C (70.7°F).
What is the month with the shortest days in Iwanuma?
The month with the shortest days in Iwanuma, Japan, is December, with an average of 9h and 36min of daylight.
Is there Daylight Saving Time (DST) in Iwanuma?
Iwanuma, Japan, does not observe Daylight Saving Time (DST). JST timezone is used throughout the entire year.
Average temperature
Iwanuma, Japan
The warmest month (with the highest average high temperature) is August (27.6°C).
The month with the lowest average high temperature is January (3.6°C).
The month with the highest average low temperature is August (21.5°C).
The coldest month (with the lowest average low temperature) is February (-1.2°C).
Average pressure
Iwanuma, Japan
- Average pressure in January:
1016.2mbar - Average pressure in February:
1017.8mbar - Average pressure in March:
1016.1mbar - Average pressure in April:
1014.7mbar - Average pressure in May:
1012mbar - Average pressure in June:
1009.3mbar
- Average pressure in July:
1009.4mbar - Average pressure in August:
1010.2mbar - Average pressure in September:
1014.1mbar - Average pressure in October:
1017.5mbar - Average pressure in November:
1018.7mbar - Average pressure in December:
1016.3mbar
The month with the highest atmospheric pressure is November (1018.7mbar).
The month with the lowest atmospheric pressure is June (1009.3mbar).
Average wind speed
Iwanuma, Japan
- Average wind speed in January:
15.4km/h - Average wind speed in February:
14.9km/h - Average wind speed in March:
14.2km/h - Average wind speed in April:
13.4km/h - Average wind speed in May:
11.4km/h - Average wind speed in June:
9.8km/h
- Average wind speed in July:
8.4km/h - Average wind speed in August:
9.1km/h - Average wind speed in September:
10.2km/h - Average wind speed in October:
12.2km/h - Average wind speed in November:
12.6km/h - Average wind speed in December:
15km/h
The windiest month (with the highest average wind speed) is January (15.4km/h).
The calmest month (with the lowest average wind speed) is July (8.4km/h).
Average humidity
Iwanuma, Japan
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is April (72%).
Average rainfall
Iwanuma, Japan
The wettest month (with the highest rainfall) is July (118mm).
The driest month (with the least rainfall) is February (22mm).
Average rainfall days
Iwanuma, Japan
- Average rainfall days in January:
6.8 days - Average rainfall days in February:
6.1 days - Average rainfall days in March:
10.8 days - Average rainfall days in April:
12.7 days - Average rainfall days in May:
10.2 days - Average rainfall days in June:
15.1 days
- Average rainfall days in July:
19.6 days - Average rainfall days in August:
16.8 days - Average rainfall days in September:
13.5 days - Average rainfall days in October:
12.2 days - Average rainfall days in November:
8.5 days - Average rainfall days in December:
9.3 days
The month with the highest number of rainy days is July (19.6 days).
The month with the least rainy days is February (6.1 days).
Average snowfall
Iwanuma, Japan
The month with the highest snowfall is January (67mm).
The months with the least snowfall are May, June, July, August, September, October and November (0mm).
Average snowfall days
Iwanuma, Japan
- Average snowfall days in January:
7 days - Average snowfall days in February:
5.3 days - Average snowfall days in March:
3.4 days - Average snowfall days in April:
0.3 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:
3.2 days
The month with the highest number of snowfall days is January (7 days).
The months with the least snowfall days are May, June, July, August, September, October and November (0 days).
Average daylight / Average sunshine
Iwanuma, 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 5min
- Average daylight in July:
14h and 3min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 1min - 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 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in January:
5h and 1min - Average sunshine in February:
5h and 1min - Average sunshine in March:
6h and 4min - Average sunshine in April:
9h and 1min - Average sunshine in May:
9h and 4min - Average sunshine in June:
8h and 5min
- Average sunshine in July:
8h and 4min - Average sunshine in August:
9h and 1min - Average sunshine in September:
7h and 4min - Average sunshine in October:
7h and 2min - Average sunshine in November:
5h and 5min - Average sunshine in December:
5h and 4min
The month with the most sunshine is May (Average sunshine: 9h and 36min).
The months with the least sunshine are January and February (Average sunshine: 5h and 6min).
Average sunshine days
Iwanuma, Japan
- Average sunshine days in January:
19.2 days - Average sunshine days in February:
18.2 days - Average sunshine days in March:
18 days - Average sunshine days in April:
15.5 days - Average sunshine days in May:
18.3 days - Average sunshine days in June:
12.6 days
- Average sunshine days in July:
8.6 days - Average sunshine days in August:
12.3 days - Average sunshine days in September:
14.8 days - Average sunshine days in October:
17.6 days - Average sunshine days in November:
20.2 days - Average sunshine days in December:
18.3 days
The month with the most sunshine days is November (20.2 days).
The month with the least sunshine days is July (8.6 days).
Average UV index
Iwanuma, 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
Iwanuma, Japan
The month with the most cloud cover is July (Cloud cover 48).
The month with the least cloud cover is May (Cloud cover 35).
Average visibility
Iwanuma, Japan
The months with the highest visibility are January, February, March, October, November and December (10km).
The months with the lowest visibility are April, May, June, July, August and September (9km).
