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
Ruhnu in September undergoes a slight reduction in the average high-temperature, shifting from August's enjoyable 19.3°C (66.7°F) to a moderate 15.9°C (60.6°F). In Ruhnu, nights during September observe an average temperature decrease to a still refreshing 13.7°C (56.7°F).Humidity
In Ruhnu, the average relative humidity in September is 76%.Rainfall
In September, in Ruhnu, the rain falls for 13.1 days. Throughout September, 25mm (0.98") of precipitation is accumulated. Throughout the year, in Ruhnu, there are 133.3 rainfall days, and 249mm (9.8") of precipitation is accumulated.Snowfall
May through September are months without snowfall in Ruhnu.Daylight
In September, the average length of the day in Ruhnu, Estonia, is 12h and 48min.On the first day of the month, sunrise is at 06:28 and sunset at 20:25. On the last day of September, in Ruhnu, sunrise is at 07:30 and sunset at 19:03 EEST.
Sunshine
In Ruhnu, Estonia, the average sunshine in September is 7.9h.UV index
In Ruhnu, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the average person.Note: During September, 4 as the daily maximum UV index converts into the following advice:
Undertake precautions - Obligation exists to protect against skin and eye damage. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.
Frequently asked questions
What are the temperatures in Ruhnu in September?
What is the average humidity in September in Ruhnu?
How many days does it rain in September in Ruhnu?
When it does not snow in Ruhnu?
Does it snow in Ruhnu in September?
What is the average length of the day in September in Ruhnu?
When is the sunrise / sunset in September in Ruhnu?
How long on average sun shines in September in Ruhnu?
What is the UV index intensity in September in Ruhnu?
Average temperature in September
Ruhnu, Estonia
- Average high temperature in September: 15.9°C
The warmest month (with the highest average high temperature) is August (19.3°C).
The month with the lowest average high temperature is February (-0.4°C).
- Average low temperature in September: 13.7°C
The month with the highest average low temperature is August (16.5°C).
The coldest month (with the lowest average low temperature) is February (-2.3°C).
Average pressure in September
Ruhnu, Estonia
- Average pressure in September: 1014.6mbar
The month with the highest atmospheric pressure is May (1015.4mbar).
The month with the lowest atmospheric pressure is December (1010mbar).
Average wind speed in September
Ruhnu, Estonia
- Average wind speed in September: 26.3km/h
The windiest month (with the highest average wind speed) is December (33.1km/h).
The calmest month (with the lowest average wind speed) is May (19.2km/h).
Average humidity in September
Ruhnu, Estonia
- Average humidity in September: 76%
The month with the highest relative humidity is February (87%).
The month with the lowest relative humidity is August (75%).
Average rainfall in September
Ruhnu, Estonia
- Average rainfall in September: 25mm
The wettest month (with the highest rainfall) is August (38mm).
The driest month (with the least rainfall) is April (9mm).
Average rainfall days in September
Ruhnu, Estonia
- Average rainfall days in September: 13.1 days
The month with the highest number of rainy days is July (15.4 days).
The month with the least rainy days is February (6.7 days).
Average snowfall in September
Ruhnu, Estonia
- Average snowfall in September: 0mm
The month with the highest snowfall is January (27mm).
The months with the least snowfall are May, June, July, August and September (0mm).
Average snowfall days in September
Ruhnu, Estonia
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (10.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Ruhnu, Estonia
- Average daylight in September: 12h and 5min
The month with the longest days is June (Average daylight: 18h and 0min).
The month with the shortest days is December (Average daylight: 6h and 42min).
- Average sunshine in September: 7h and 5min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 2h and 0min).
Average sunshine days in September
Ruhnu, Estonia
- Average sunshine days in September: 11.7 days
The month with the most sunshine days is May (18.7 days).
The month with the least sunshine days is December (9 days).
Average UV index in September
Ruhnu, Estonia
- Average UV index in September: 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, March and December (UV index 1).
Average cloud cover in September
Ruhnu, Estonia
- Average cloud cover in September: 44
The month with the most cloud cover is December (Cloud cover 76).
The months with the least cloud cover are July and August (Cloud cover 32).
Average visibility in September
Ruhnu, Estonia
- Average visibility in September: 10km
The months with the highest visibility are April, May, June, July, August, September and October (10km).
The months with the lowest visibility are January, February, March, November and December (9km).
Ruhnu, Estonia
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