Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
As August transitions into September, Karjalohja sees a drop in the average high-temperature, transitioning from a pleasant 20.1°C (68.2°F) to a mild 15.1°C (59.2°F). Karjalohja experiences an average nighttime temperature of 8.5°C (47.3°F) in the month of September.Humidity
In Karjalohja, the average relative humidity in September is 83%.Rainfall
In Karjalohja, during September, the rain falls for 13.1 days and regularly aggregates up to 24mm (0.94") of precipitation. Throughout the year, there are 122.6 rainfall days, and 277mm (10.91") of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day is 12h and 52min.On the first day of the month, sunrise is at 06:20 and sunset at 20:29. On the last day of September, sunrise is at 07:29 and sunset at 19:00 EEST.
Sunshine
The average sunshine in September is 7.3h.UV index
In Karjalohja, the average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for average individuals.Note: An average maximum UV index of 3 in September leads to these recommendations:
Undertake precautions - Obligation exists to protect against skin and eye damage. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Frequently asked questions
What are the temperatures in Karjalohja in September?
What is the average humidity in September in Karjalohja?
How much does it rain in Karjalohja in September?
When it does not snow in Karjalohja?
Does it snow in Karjalohja in September?
How many hours of daylight does Karjalohja have in September?
When are sunrise and sunset in September in Karjalohja?
How long on average sun shines in September in Karjalohja?
What is the UV index intensity in September in Karjalohja?
Average temperature in September
Karjalohja, Finland
- Average high temperature in September: 15.1°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
Karjalohja, Finland
- Average pressure in September: 1013.2mbar
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
Karjalohja, 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
Karjalohja, 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
Karjalohja, Finland
- Average rainfall in September: 24mm
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
Karjalohja, Finland
- Average rainfall days in September: 13.1 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
Karjalohja, 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
Karjalohja, 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
Karjalohja, Finland
- Average daylight in September: 12h and 5min
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 2min
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 42min).
Average sunshine days in September
Karjalohja, Finland
- Average sunshine days in September: 13.8 days
The month with the most sunshine days is May (16.8 days).
The month with the least sunshine days is December (10.3 days).
Average UV index in September
Karjalohja, 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
Karjalohja, Finland
- Average cloud cover in September: 49
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
Karjalohja, 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).
Karjalohja, Finland
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