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
September
Weather in September
Temperature
A minor decrease in the average high-temperature is observed during September, shifting from a comfortable 19.7°C (67.5°F) in August to a moderate 15.5°C (59.9°F). Night temperatures during September in Keila-Joa, Estonia, stabilize at an average of 12°C (53.6°F), closely mirroring the daytime temperatures.Humidity
In September, the average relative humidity in Keila-Joa is 79%.Rainfall
In Keila-Joa, Estonia, in September, it is raining for 18.5 days, with typically 59mm (2.32") of accumulated precipitation. In Keila-Joa, during the entire year, the rain falls for 159.9 days and collects up to 528mm (20.79") of precipitation.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September is 12h and 50min.On the first day of September, sunrise is at 06:20 and sunset at 20:24. On the last day of the month, sunrise is at 07:26 and sunset at 18:58 EEST.
Sunshine
The average sunshine in September in Keila-Joa is 7.5h.UV index
In September, the average daily maximum UV index in Keila-Joa, Estonia, is 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: The UV index of 3 during September leads to these advisories:
Heed the precautions - Suggestions to avoid sunburn are made. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Keila-Joa?
What is the average humidity in September in Keila-Joa?
How much does it rain in Keila-Joa in September?
When it does not snow in Keila-Joa?
Does it snow in Keila-Joa in September?
How many hours of daylight does Keila-Joa have in September?
When is the sunrise / sunset in September in Keila-Joa?
How long on average sun shines in September in Keila-Joa?
What is the UV index intensity in September in Keila-Joa?
Average temperature in September
Keila-Joa, Estonia
- Average high temperature in September: 15.5°C
The warmest month (with the highest average high temperature) is July (19.8°C).
The month with the lowest average high temperature is January (-1.2°C).
- Average low temperature in September: 12°C
The month with the highest average low temperature is July (15.1°C).
The coldest month (with the lowest average low temperature) is February (-4.1°C).
Average pressure in September
Keila-Joa, Estonia
- Average pressure in September: 1013.8mbar
The month with the highest atmospheric pressure is May (1015.1mbar).
The month with the lowest atmospheric pressure is December (1008.9mbar).
Average wind speed in September
Keila-Joa, Estonia
- Average wind speed in September: 19.5km/h
The windiest month (with the highest average wind speed) is December (24km/h).
The calmest month (with the lowest average wind speed) is May (15.2km/h).
Average humidity in September
Keila-Joa, Estonia
- Average humidity in September: 79%
The month with the highest relative humidity is February (89%).
The months with the lowest relative humidity are May and August (75%).
Average rainfall in September
Keila-Joa, Estonia
- Average rainfall in September: 59mm
The wettest month (with the highest rainfall) is August (67mm).
The driest month (with the least rainfall) is April (21mm).
Average rainfall days in September
Keila-Joa, Estonia
- Average rainfall days in September: 18.5 days
The month with the highest number of rainy days is August (19.3 days).
The month with the least rainy days is February (5.8 days).
Average snowfall in September
Keila-Joa, Estonia
- Average snowfall in September: 0mm
The month with the highest snowfall is January (91mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Keila-Joa, Estonia
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (13.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Keila-Joa, Estonia
- Average daylight in September: 12h and 5min
The month with the longest days is June (Average daylight: 18h and 30min).
The month with the shortest days is December (Average daylight: 6h and 12min).
- Average sunshine in September: 7h and 3min
The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is December (Average sunshine: 1h and 48min).
Average sunshine days in September
Keila-Joa, Estonia
- Average sunshine days in September: 8.3 days
The month with the most sunshine days is May (16.6 days).
The month with the least sunshine days is December (6.9 days).
Average UV index in September
Keila-Joa, Estonia
- Average UV index in September: 3
The months with the highest UV index are July and August (UV index 5).
The months with the lowest UV index are February, November and December (UV index 1).
Average cloud cover in September
Keila-Joa, Estonia
- Average cloud cover in September: 47
The month with the most cloud cover is December (Cloud cover 77).
The month with the least cloud cover is July (Cloud cover 34).
Average visibility in September
Keila-Joa, Estonia
- Average visibility in September: 10km
The months with the highest visibility are May, June, July, August and September (10km).
The months with the lowest visibility are January, February, March, April, October, November and December (9km).
