September weather forecastLohja, Finland
September
Weather in September
September, the first month of the autumn in Lohja, is still a mild month, with an average temperature varying between 8.5°C (47.3°F) and 15°C (59°F).Temperature
The start of September comes with a reduction in the average high-temperature, receding from a pleasant 20.1°C (68.2°F) in August to a moderate 15°C (59°F). Lohja's nights in September experience an average temperature drop to a frosty 8.5°C (47.3°F).Humidity
In Lohja, Finland, the average relative humidity in September is 83%.Rainfall
In Lohja, in September, during 12.6 rainfall days, 23mm (0.91") of precipitation is typically accumulated. Throughout the year, there are 122 rainfall days, and 276mm (10.87") of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
In Lohja, Finland, the average length of the day in September is 12h and 52min.On the first day of September in Lohja, sunrise is at 06:19 and sunset at 20:27. On the last day of the month, sunrise is at 07:28 and sunset at 18:58 EEST.
Sunshine
The average sunshine in September in Lohja, Finland, is 7.4h.UV index
In September, the average daily maximum UV index in Lohja, Finland, is 3. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: In September, a daily UV index of 3 turns into the following recommendations:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Lohja, Finland
- Average high temperature in September: 15°C
The warmest month (with the highest average high temperature) is July (21.2°C).
The month with the lowest average high temperature is January (-3.2°C).
- Average low temperature in September: 8.5°C
The month with the highest average low temperature is July (12.6°C).
The coldest month (with the lowest average low temperature) is January (-7.3°C).
Average pressure in September
Lohja, Finland
- Average pressure in September: 1013.4mbar
The month with the highest atmospheric pressure is May (1014.9mbar).
The month with the lowest atmospheric pressure is December (1008.1mbar).
Average wind speed in September
Lohja, Finland
- Average wind speed in September: 12km/h
The windiest month (with the highest average wind speed) is December (15.2km/h).
The calmest month (with the lowest average wind speed) is August (11km/h).
Average humidity in September
Lohja, Finland
- Average humidity in September: 83%
The months with the highest relative humidity are January and February (93%).
The month with the lowest relative humidity is May (70%).
Average rainfall in September
Lohja, Finland
- Average rainfall in September: 23mm
The wettest month (with the highest rainfall) is July (35mm).
The driest month (with the least rainfall) is April (14mm).
Average rainfall days in September
Lohja, Finland
- Average rainfall days in September: 12.6 days
The month with the highest number of rainy days is July (15.9 days).
The month with the least rainy days is February (3.3 days).
Average snowfall in September
Lohja, Finland
- Average snowfall in September: 0mm
The month with the highest snowfall is December (91mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Lohja, Finland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (15.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Lohja, Finland
- Average daylight in September: 12h and 54min
The month with the longest days is June (Average daylight: 18h and 48min).
The month with the shortest days is December (Average daylight: 6h and 0min).
- Average sunshine in September: 7h and 24min
The month with the most sunshine is June (Average sunshine: 11h and 42min).
The month with the least sunshine is December (Average sunshine: 1h and 48min).
Average sunshine days in September
Lohja, Finland
- Average sunshine days in September: 14 days
The month with the most sunshine days is May (16.8 days).
The month with the least sunshine days is December (10.4 days).
Average UV index in September
Lohja, Finland
- Average UV index in September: 3
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 1).
Average cloud cover in September
Lohja, Finland
- Average cloud cover in September: 48
The months with the most cloud cover are February and December (Cloud cover 74).
The month with the least cloud cover is August (Cloud cover 38).
Average visibility in September
Lohja, Finland
- Average visibility in September: 9km
The months with the highest visibility are May, June, July, August and September (9km).
The months with the lowest visibility are January, February and March (7km).
