Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
May
Weather in May
Temperature
With the onset of May, Iso-Heikkilä's average high-temperature sees a rise, moving from April's frosty 6.8°C (44.2°F) to a moderate 13.2°C (55.8°F). May nights are marked by an average temperature drop to a chilly 6.7°C (44.1°F).Humidity
May is the least humid month, with an average relative humidity of 71%.Rainfall
In Iso-Heikkilä, in May, during 12 rainfall days, 27mm (1.06") of precipitation is typically accumulated. Throughout the year, in Iso-Heikkilä, there are 134.6 rainfall days, and 394mm (15.51") of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall in Iso-Heikkilä. May is the last month it regularly snows. During 0.8 snowfall days, in May, Iso-Heikkilä aggregates 13mm (0.51") of snow. In Iso-Heikkilä, during the entire year, snow falls for 60.5 days and aggregates up to 454mm (17.87") of snow.Daylight
In Iso-Heikkilä, the average length of the day in May is 17h and 19min.On the first day of May in Iso-Heikkilä, Finland, sunrise is at 05:24 and sunset at 21:31. On the last day of the month, sunrise is at 04:16 and sunset at 22:41 EEST.
Sunshine
The average sunshine in May is 10.2h.UV index
In May, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the ordinary person.Note: The UV index of 4 in May translates into these instructions:
Act with care - Obligation to protect against skin and eye damage is highlighted. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average May temperature in Iso-Heikkilä?
What is the least humid month in Iso-Heikkilä?
What is the average humidity in May in Iso-Heikkilä?
How many days does it rain in May in Iso-Heikkilä?
What is the last month it snows in Iso-Heikkilä?
How many hours of daylight does Iso-Heikkilä have in May?
When is the sunrise / sunset in May in Iso-Heikkilä?
How long on average sun shines in May in Iso-Heikkilä?
What is the UV index intensity in May in Iso-Heikkilä?
Average temperature in May
Iso-Heikkilä, Finland
- Average high temperature in May: 13.2°C
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).
- Average low temperature in May: 6.7°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 in May
Iso-Heikkilä, Finland
- Average pressure in May: 1014.9mbar
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 in May
Iso-Heikkilä, Finland
- Average wind speed in May: 14.4km/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 in May
Iso-Heikkilä, Finland
- Average humidity in May: 71%
The month with the highest relative humidity is February (91%).
The month with the lowest relative humidity is May (71%).
Average rainfall in May
Iso-Heikkilä, Finland
- Average rainfall in May: 27mm
The wettest month (with the highest rainfall) is July (49mm).
The driest month (with the least rainfall) is April (19mm).
Average rainfall days in May
Iso-Heikkilä, Finland
- Average rainfall days in May: 12 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 in May
Iso-Heikkilä, Finland
- Average snowfall in May: 13mm
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 in May
Iso-Heikkilä, Finland
- Average snowfall days in May: 0.8 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 in May /
Average sunshine in May
Iso-Heikkilä, Finland
- Average daylight in May: 17h and 2min
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 May: 10h and 1min
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 in May
Iso-Heikkilä, Finland
- Average sunshine days in May: 17.2 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 in May
Iso-Heikkilä, Finland
- Average UV index in May: 4
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 in May
Iso-Heikkilä, Finland
- Average cloud cover in May: 40
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 in May
Iso-Heikkilä, Finland
- Average visibility in May: 10km
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).
