Climate and monthly weather forecastIyo, Japan
Climate and monthly weather forecast
Weather in January
January, the same as December, in Iyo, Japan, is a frosty winter month, with temperature in the range of an average high of 8°C (46.4°F) and an average low of 2.9°C (37.2°F). The month of January, characterized by an average high of 8°C (46.4°F) and a low of 2.9°C (37.2°F), is recognized as the coldest. Weather in January »Weather in February
February, the last month of the winter in Iyo, is also a frosty month, with an average temperature ranging between max 8.7°C (47.7°F) and min 3.4°C (38.1°F). Entering February, the average high-temperature is recorded at a still chilly 8.7°C (47.7°F), exhibiting a minimal shift from January's 8°C (46.4°F). Weather in February »Weather in March
The first month of the spring, March, is a fresh month in Iyo, Japan, with temperature in the range of an average low of 5.6°C (42.1°F) and an average high of 12°C (53.6°F). March signals a minor shift in the average high-temperature, moving from February's frosty 8.7°C (47.7°F) to a fresh 12°C (53.6°F). Weather in March »Weather in April
April is a comfortable spring month in Iyo, Japan, with temperature in the range of an average low of 9.7°C (49.5°F) and an average high of 16.1°C (61°F). April's arrival is noted with a slight increase in the average high-temperature, moving from a cool 12°C (53.6°F) in March to a refreshing 16.1°C (61°F). Weather in April »Weather in May
The last month of the spring, May, is an agreeable month in Iyo, Japan, with an average temperature varying between 20.8°C (69.4°F) and 14.1°C (57.4°F). With the onset of May, Iyo's weather sees a minor temperature rise, transitioning from a comfortable 16.1°C (61°F) in April to an agreeable 20.8°C (69.4°F). Weather in May »Weather in June
June, the first month of the summer in Iyo, is a moderately hot month, with temperature in the range of an average high of 23.5°C (74.3°F) and an average low of 18.1°C (64.6°F). Iyo's weather in June, with an average high-temperature of a moderately hot 23.5°C (74.3°F), subtly shifts from May's 20.8°C (69.4°F). Weather in June »Weather in July
July, the same as June, is another warm summer month in Iyo, Japan, with an average temperature varying between 27.3°C (81.1°F) and 22.3°C (72.1°F). Iyo's July weather indicates a minor increase in high-temperatures, edging from June's 23.5°C (74.3°F) to a still warm 27.3°C (81.1°F). Weather in July »Weather in August
August, the last month of the summer in Iyo, is another warm month, with an average temperature varying between 23.4°C (74.1°F) and 29.2°C (84.6°F). With its high average temperature of 29.2°C (84.6°F) and a low of 23.4°C (74.1°F), August is regarded as the warmest month. August's mean heat index is computed to be a fiery hot 35°C (95°F). Weather in August »Weather in September
September, the first month of the autumn in Iyo, is also a moderately hot month, with an average temperature varying between 25.5°C (77.9°F) and 20.1°C (68.2°F). The shift from August to September includes a small decrease in the average high-temperature, from a warm 29.2°C (84.6°F) to a still moderately hot 25.5°C (77.9°F). Weather in September »Weather in October
October, like September, is an agreeable autumn month in Iyo, Japan, with an average temperature varying between 15.5°C (59.9°F) and 21°C (69.8°F). October's arrival coincides with a soft drop in the average high-temperature, subtly decreasing from September's warm 25.5°C (77.9°F) to a pleasant 21°C (69.8°F). Weather in October »Weather in November
The last month of the autumn, November, is another mild month in Iyo, Japan, with an average temperature fluctuating between 15.5°C (59.9°F) and 10.1°C (50.2°F). With the onset of November, Iyo experiences a modest temperature adjustment, with the average high-temperature receding from a pleasant 21°C (69.8°F) in October to a refreshing 15.5°C (59.9°F). Weather in November »Weather in December
December, the first month of the winter in Iyo, is still a chilly month, with temperature in the range of an average low of 5°C (41°F) and an average high of 9.9°C (49.8°F). A change in temperatures is noted as November gives way to December, with average highs reducing from a moderate 15.5°C (59.9°F) to a frosty 9.9°C (49.8°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
January brings the lowest temperatures, with an average high of 8°C (46.4°F) and an average low of 2.9°C (37.2°F).
The months with the lowest humidity are January through March, with an average relative humidity of 72%.
The month with the least rainfall is January, when the rain falls for 8.3 days and typically collects 24mm (0.94") of precipitation.
In Iyo, Japan, during the entire year, the rain falls for 162.8 days and collects up to 749mm (29.49") of precipitation.
January, February and December are months with snowfall in Iyo, Japan.
In Iyo, during the entire year, snow falls for 3.4 days and aggregates up to 13mm (0.51") of snow.
The month with the least sunshine is January, with an average of 5.2h of sunshine.
The months with the lowest UV index in Iyo are January and December, with an average maximum UV index of 2.
The month with the coldest seawater in Iyo is February, with an average sea temperature of 14.7°C (58.5°F).
In Iyo, Japan, snow does not fall in March through November.
The month with the most rainfall is June, when the rain falls for 17.9 days and typically aggregates up to 149mm (5.87") of precipitation.
June has the longest days of the year, with an average of 14h and 24min of daylight.
July is the most humid month in Iyo, Japan, with an average relative humidity of 84%.
The month with the highest UV index in Iyo, Japan, is July, with an average maximum UV index of 7.
August is the warmest month in Iyo, with the temperature often reaching an average high of 29.2°C (84.6°F) and an average low of 23.4°C (74.1°F).
With an average sea temperature of 27.2°C (81°F), August is the month with the warmest seawater in Iyo, Japan.
With an average of 10.8h of sunshine, August has the most sunshine of the year.
December is the month with the most snowfall in Iyo. Snow falls for 1.2 days and accumulates 6mm (0.24") of snow.
The month with the shortest days in Iyo is December, with an average of 10h and 0min of daylight.
Iyo does not observe Daylight Saving Time (DST). JST timezone is used over the entire year.
Average temperature
Iyo, Japan
The warmest month (with the highest average high temperature) is August (29.2°C).
The month with the lowest average high temperature is January (8°C).
The month with the highest average low temperature is August (23.4°C).
The coldest month (with the lowest average low temperature) is January (2.9°C).
Average pressure
Iyo, Japan
- Average pressure in January:
1021mbar - Average pressure in February:
1020.5mbar - Average pressure in March:
1018.1mbar - Average pressure in April:
1015.1mbar - Average pressure in May:
1012.1mbar - Average pressure in June:
1008.4mbar
- Average pressure in July:
1008.9mbar - Average pressure in August:
1009.1mbar - Average pressure in September:
1012.4mbar - Average pressure in October:
1016.8mbar - Average pressure in November:
1020mbar - Average pressure in December:
1020.6mbar
The month with the highest atmospheric pressure is January (1021mbar).
The month with the lowest atmospheric pressure is June (1008.4mbar).
Average wind speed
Iyo, Japan
- Average wind speed in January:
12.2km/h - Average wind speed in February:
11km/h - Average wind speed in March:
10.9km/h - Average wind speed in April:
9.5km/h - Average wind speed in May:
7.7km/h - Average wind speed in June:
6.6km/h
- Average wind speed in July:
7.2km/h - Average wind speed in August:
6.9km/h - Average wind speed in September:
8.1km/h - Average wind speed in October:
10.1km/h - Average wind speed in November:
9.9km/h - Average wind speed in December:
11.9km/h
The windiest month (with the highest average wind speed) is January (12.2km/h).
The calmest month (with the lowest average wind speed) is June (6.6km/h).
Average humidity
Iyo, Japan
The month with the highest relative humidity is July (84%).
The months with the lowest relative humidity are January, February and March (72%).
Average rainfall
Iyo, Japan
The wettest month (with the highest rainfall) is June (149mm).
The driest month (with the least rainfall) is January (24mm).
Average rainfall days
Iyo, Japan
- Average rainfall days in January:
8.3 days - Average rainfall days in February:
10.6 days - Average rainfall days in March:
12.8 days - Average rainfall days in April:
12.4 days - Average rainfall days in May:
11.7 days - Average rainfall days in June:
17.9 days
- Average rainfall days in July:
21.3 days - Average rainfall days in August:
20.3 days - Average rainfall days in September:
15.6 days - Average rainfall days in October:
11.4 days - Average rainfall days in November:
9.8 days - Average rainfall days in December:
10.7 days
The month with the highest number of rainy days is July (21.3 days).
The month with the least rainy days is January (8.3 days).
Average snowfall
Iyo, Japan
The month with the highest snowfall is December (6mm).
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0mm).
Average snowfall days
Iyo, Japan
- Average snowfall days in January:
1.3 days - Average snowfall days in February:
0.7 days - Average snowfall days in March:
0.2 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:
1.2 days
The month with the highest number of snowfall days is January (1.3 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average sea temperature
Iyo, Japan
The best month for swimming (with the highest average sea temperature) is August (27.2°C).
The coldest month (with the lowest average sea temperature) is February (14.7°C).
Average daylight / Average sunshine
Iyo, Japan
- Average daylight in January:
10h and 12min - 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 54min - Average daylight in June:
14h and 24min
- Average daylight in July:
14h and 6min - Average daylight in August:
13h and 24min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 18min - Average daylight in November:
10h and 24min - Average daylight in December:
10h and 0min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in January:
5h and 12min - Average sunshine in February:
5h and 42min - Average sunshine in March:
7h and 30min - Average sunshine in April:
9h and 24min - Average sunshine in May:
9h and 48min - Average sunshine in June:
9h and 0min
- Average sunshine in July:
9h and 36min - Average sunshine in August:
10h and 48min - Average sunshine in September:
9h and 24min - Average sunshine in October:
6h and 12min - Average sunshine in November:
6h and 12min - Average sunshine in December:
5h and 18min
The month with the most sunshine is August (Average sunshine: 10h and 48min).
The month with the least sunshine is January (Average sunshine: 5h and 12min).
Average sunshine days
Iyo, Japan
- Average sunshine days in January:
20.3 days - Average sunshine days in February:
16.2 days - Average sunshine days in March:
17 days - Average sunshine days in April:
14.9 days - Average sunshine days in May:
17.2 days - Average sunshine days in June:
9.9 days
- Average sunshine days in July:
6.7 days - Average sunshine days in August:
6.4 days - Average sunshine days in September:
11.6 days - Average sunshine days in October:
17.5 days - Average sunshine days in November:
17.3 days - Average sunshine days in December:
17.5 days
The month with the most sunshine days is January (20.3 days).
The month with the least sunshine days is August (6.4 days).
Average UV index
Iyo, 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
Iyo, Japan
The month with the most cloud cover is January (Cloud cover 43).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility
Iyo, Japan
The months with the highest visibility are January, February, March, August, September, October, November and December (10km).
The months with the lowest visibility are April, May, June and July (9km).
