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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, the same as December, in Illoinen, Finland, is another subzero cold winter month, with temperature in the range of an average high of -1.9°C (28.6°F) and an average low of -5.3°C (22.5°F). Illoinen's coldest month, January, registers temperatures that range from a high of -1.9°C (28.6°F) to a low of -5.3°C (22.5°F). Weather in January »
Weather in February
February, the last month of the winter in Illoinen, is also a subzero cold month, with an average temperature ranging between max -1.7°C (28.9°F) and min -5.6°C (21.9°F). The shift to February signals an average high-temperature of a still freezing cold -1.7°C (28.9°F), subtly varied from January's -1.9°C (28.6°F). Weather in February »
Weather in March
March, the first month of the spring in Illoinen, is a cold month, with an average temperature fluctuating between 1.3°C (34.3°F) and -3.5°C (25.7°F). Illoinen in March observes a minor temperature shift, with average high-temperatures adjusting from a freezing cold -1.7°C (28.9°F) in February to a wintry 1.3°C (34.3°F). Weather in March »
Weather in April
April is a chilly spring month in Illoinen, Finland, with an average temperature varying between 1.4°C (34.5°F) and 6.8°C (44.2°F). With the beginning of April, Illoinen's average high-temperature sees an increase, transitioning from an icy 1.3°C (34.3°F) in March to a chilly 6.8°C (44.2°F). Weather in April »
Weather in May
May, the last month of the spring in Illoinen, is a moderate month, with temperature in the range of an average high of 13.2°C (55.8°F) and an average low of 6.7°C (44.1°F). May signals a shift in the average high-temperature, moving from April's frosty 6.8°C (44.2°F) to a moderate 13.2°C (55.8°F). Weather in May »
Weather in June
The first month of the summer, June, is an enjoyable month in Illoinen, Finland, with an average temperature fluctuating between 17°C (62.6°F) and 10.1°C (50.2°F). In Illoinen, the average high-temperature in June slightly rises, from a mild 13.2°C (55.8°F) in May, to an enjoyable 17°C (62.6°F). Weather in June »
Weather in July
July is an agreeable summer month in Illoinen, Finland, with an average temperature ranging between max 20.4°C (68.7°F) and min 13.8°C (56.8°F). July, with average temperatures reaching a high of 20.4°C (68.7°F) and a low of 13.8°C (56.8°F), is the warmest month. Weather in July »
Weather in August
The last month of the summer, August, is also an enjoyable month in Illoinen, Finland, with temperature in the range of an average high of 19.7°C (67.5°F) and an average low of 13.8°C (56.8°F). The transition into August shows a subtle variation to a refreshing 19.7°C (67.5°F) from July's 20.4°C (68.7°F) in the average high-temperature. Weather in August »
Weather in September
The first month of the autumn, September, is also a moderate month in Illoinen, Finland, with an average temperature varying between 15.3°C (59.5°F) and 10.2°C (50.4°F). With the onset of September, Illoinen's average high-temperature slightly adjusts, moderately receding from August's enjoyable 19.7°C (67.5°F) to a moderate 15.3°C (59.5°F). Weather in September »
Weather in October
October, the same as September, in Illoinen, Finland, is another chilly autumn month, with an average temperature varying between 4.7°C (40.5°F) and 8.5°C (47.3°F). Illoinen in October undergoes a mild reduction in the average high-temperature, shifting from September's mild 15.3°C (59.5°F) to a frosty 8.5°C (47.3°F). Weather in October »
Weather in November
November, the last month of the autumn in Illoinen, is also an icy month, with an average temperature fluctuating between 1.7°C (35.1°F) and 4.5°C (40.1°F). November marks a gentle change in average high-temperature, declining from October's chilly 8.5°C (47.3°F) to an icy 4.5°C (40.1°F). Weather in November »
Weather in December
December, the first month of the winter in Illoinen, is also an icy month, with an average temperature varying between -2.2°C (28°F) and 1.1°C (34°F). The commencement of December indicates a gentle shift in the average high-temperature, receding from November's 4.5°C (40.1°F) to a still icy 1.1°C (34°F). Weather in December »
Updated: Feb 1, 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 month is the coldest in Illoinen?
January, with its high-temperature average of -1.9°C (28.6°F) and a low-temperature average of -5.3°C (22.5°F), is the coldest month in Illoinen, Finland.
How many days does it rain in Illoinen?
Throughout the year, in Illoinen, Finland, there are 134.6 rainfall days, and 394mm (15.51") of precipitation is accumulated.
When does it snow in Illoinen?
Months with snowfall are January through May, October through December.
When does it snow the most in Illoinen?
The month with the most snowfall is January, when snow falls for 13.7 days and typically aggregates up to 103mm (4.06") of snow.
How much does it snow in Illoinen?
Throughout the year, in Illoinen, Finland, there are 60.5 snowfall days, and 454mm (17.87") of snow is accumulated.
What is the month with the lowest UV index in Illoinen?
The months with the lowest UV index in Illoinen are January through March, November and December, with an average maximum UV index of 1.
What is the most humid month in Illoinen?
With an average relative humidity of 91%, February is the most humid month in Illoinen, Finland.
What is the driest month in Illoinen?
April is the month with the least rainfall. Rain falls for 9.9 days and accumulates 19mm (0.75") of precipitation.
What is the least humid month in Illoinen?
May is the least humid month in Illoinen, Finland, with an average relative humidity of 71%.
When it does not snow in Illoinen?
In Illoinen, snow does not fall in June through September.
When are the longest days in Illoinen?
With an average of 18h and 54min of daylight, June has the longest days of the year in Illoinen.
When is the highest UV index in Illoinen?
June through August, with an average maximum UV index of 5, are months with the highest UV index.
What time of the year is the hottest in Illoinen?
Illoinen's July weather reaches an average high of 20.4°C (68.7°F) and an average low of 13.8°C (56.8°F), making it the warmest month.
What is the rainiest month in Illoinen?
July is the month with the most rainfall. Rain falls for 15.1 days and accumulates 49mm (1.93") of precipitation.
What month has the most sunshine in Illoinen?
July has the most sunshine of the year in Illoinen, Finland, with an average of 11.5h of sunshine.
When is Daylight Saving Time (DST) in Illoinen?
On Sunday, 27. October 2024, at 04:00, Daylight Saving Time ends, and the time zone changes from EEST to EET. The next Daylight Saving Time starts on Sunday, 30. March 2025, at 03:00, and the time zone reverts from EET to EEST.
What is the month with the shortest days in Illoinen?
With an average of 5h and 54min of daylight, December has the shortest days of the year.
What is the month with the least sunshine in Illoinen?
The month with the least sunshine in Illoinen is December, with an average of 1.9h of sunshine.
Average temperature
Illoinen, Finland
The warmest month (with the highest average high temperature) is July (20.4°C).
The month with the lowest average high temperature is January (-1.9°C).
The months with the highest average low temperature are July and August (13.8°C).
The coldest month (with the lowest average low temperature) is February (-5.6°C).
Average pressure
Illoinen, Finland
- Average pressure in January:
1011.1mbar - Average pressure in February:
1011.7mbar - Average pressure in March:
1011.1mbar - Average pressure in April:
1013.6mbar - Average pressure in May:
1014.9mbar - Average pressure in June:
1012.3mbar
- Average pressure in July:
1011.1mbar - Average pressure in August:
1012.9mbar - Average pressure in September:
1013mbar - Average pressure in October:
1013.8mbar - Average pressure in November:
1011.3mbar - Average pressure in December:
1007.6mbar
The month with the highest atmospheric pressure is May (1014.9mbar).
The month with the lowest atmospheric pressure is December (1007.6mbar).
Average wind speed
Illoinen, Finland
- Average wind speed in January:
18.6km/h - Average wind speed in February:
17.2km/h - Average wind speed in March:
17km/h - Average wind speed in April:
15.5km/h - Average wind speed in May:
14.4km/h - Average wind speed in June:
14.4km/h
- Average wind speed in July:
13.9km/h - Average wind speed in August:
14.3km/h - Average wind speed in September:
15.9km/h - Average wind speed in October:
17.4km/h - Average wind speed in November:
18.4km/h - Average wind speed in December:
20.4km/h
The windiest month (with the highest average wind speed) is December (20.4km/h).
The calmest month (with the lowest average wind speed) is July (13.9km/h).
Average humidity
Illoinen, Finland
The month with the highest relative humidity is February (91%).
The month with the lowest relative humidity is May (71%).
Average rainfall
Illoinen, Finland
The wettest month (with the highest rainfall) is July (49mm).
The driest month (with the least rainfall) is April (19mm).
Average rainfall days
Illoinen, Finland
- Average rainfall days in January:
5.8 days - Average rainfall days in February:
5.2 days - Average rainfall days in March:
8.2 days - Average rainfall days in April:
9.9 days - Average rainfall days in May:
12 days - Average rainfall days in June:
11.8 days
- Average rainfall days in July:
15.1 days - Average rainfall days in August:
14.5 days - Average rainfall days in September:
14.3 days - Average rainfall days in October:
13.5 days - Average rainfall days in November:
13.2 days - Average rainfall days in December:
11.1 days
The month with the highest number of rainy days is July (15.1 days).
The month with the least rainy days is February (5.2 days).
Average snowfall
Illoinen, Finland
The month with the highest snowfall is January (103mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days
Illoinen, Finland
- Average snowfall days in January:
13.7 days - Average snowfall days in February:
12.4 days - Average snowfall days in March:
11.7 days - Average snowfall days in April:
3.1 days - Average snowfall days in May:
0.8 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:
2.2 days - Average snowfall days in November:
4.2 days - Average snowfall days in December:
12.4 days
The month with the highest number of snowfall days is January (13.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Illoinen, Finland
- Average daylight in January:
6h and 5min - Average daylight in February:
9h and 1min - Average daylight in March:
11h and 5min - Average daylight in April:
14h and 4min - Average daylight in May:
17h and 2min - Average daylight in June:
18h and 5min
- Average daylight in July:
18h and 1min - Average daylight in August:
15h and 4min - Average daylight in September:
12h and 5min - Average daylight in October:
10h and 1min - Average daylight in November:
7h and 3min - Average daylight in December:
5h and 5min
The month with the longest days is June (Average daylight: 18h and 54min).
The month with the shortest days is December (Average daylight: 5h and 54min).
- Average sunshine in January:
2h and 1min - Average sunshine in February:
2h and 5min - Average sunshine in March:
4h and 4min - Average sunshine in April:
7h and 4min - Average sunshine in May:
10h and 1min - Average sunshine in June:
11h and 2min
- Average sunshine in July:
11h and 3min - Average sunshine in August:
9h and 5min - Average sunshine in September:
7h and 4min - Average sunshine in October:
4h and 2min - Average sunshine in November:
3h and 0min - Average sunshine in December:
1h and 5min
The month with the most sunshine is July (Average sunshine: 11h and 30min).
The month with the least sunshine is December (Average sunshine: 1h and 54min).
Average sunshine days
Illoinen, Finland
- Average sunshine days in January:
13.2 days - Average sunshine days in February:
12.7 days - Average sunshine days in March:
14.1 days - Average sunshine days in April:
15.8 days - Average sunshine days in May:
17.2 days - Average sunshine days in June:
16.3 days
- Average sunshine days in July:
12.4 days - Average sunshine days in August:
13.8 days - Average sunshine days in September:
12.8 days - Average sunshine days in October:
14.7 days - Average sunshine days in November:
11.2 days - Average sunshine days in December:
9.6 days
The month with the most sunshine days is May (17.2 days).
The month with the least sunshine days is December (9.6 days).
Average UV index
Illoinen, Finland
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 1).
Average cloud cover
Illoinen, Finland
The month with the most cloud cover is December (Cloud cover 71).
The months with the least cloud cover are July and August (Cloud cover 36).
Average visibility
Illoinen, Finland
The months with the highest visibility are May, June, July, August and September (10km).
The months with the lowest visibility are February and March (8km).
