September weather forecastPärnu, Estonia
September
Weather in September
The autumn in Pärnu starts with September, bringing in cooler temperatures and shorter days. Even though the climate begins to change, the warmth from the summer hangs on for the first few weeks and continues to charm the visitors. The greenery starts showing signs of seasonal change, transforming the cityscape into an artist's palette of colors. Rainfall starts to increase when compared to August, preparing for the wet month ahead.Temperature
A subtle shift in Pärnu's weather is observed as August turns into September, with the average high temperature reducing from an agreeable 21.3°C (70.3°F) to a comfortable 16.5°C (61.7°F). During the month of September, Pärnu anticipates a mean low-temperature of 9.4°C (48.9°F).Humidity
The average relative humidity in September is 81%.Rainfall
In September, in Pärnu, the rain falls for 17.4 days. Throughout September, 49mm (1.93") of precipitation is accumulated. Throughout the year, in Pärnu, there are 175.8 rainfall days, and 570mm (22.44") of precipitation is accumulated.Snowfall
In Pärnu, Estonia, snow does not fall in June through September.Sea temperature
In Pärnu, Estonia, the average seawater temperature in September is 16.3°C (61.3°F).Note: Most individuals do not find swimming at 16.3°C (61.3°F) to be enjoyable. As the water temperature declines below 21°C (69.8°F), maintaining control over one's breathing becomes harder.
Daylight
In Pärnu, the average length of the day in September is 12h and 49min.On the first day of September, sunrise is at 06:22 and sunset at 20:21. On the last day of the month, sunrise is at 07:25 and sunset at 18:58 EEST.
Sunshine
In Pärnu, the average sunshine in September is 7.4h.UV index
In September, the average daily maximum UV index in Pärnu, Estonia, is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for average individuals.Note: A daily maximum UV index of 3 in September translates into the following instructions:
Put precautions into practice - Ensuring skin and eye safety is a necessity. Around midday, solar radiation is most harmful; hence, exposure should be limited. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Pärnu, Estonia
- Average high temperature in September: 16.5°C
The warmest month (with the highest average high temperature) is July (22.5°C).
The month with the lowest average high temperature is January (-2.1°C).
- Average low temperature in September: 9.4°C
The month with the highest average low temperature is July (13.3°C).
The coldest month (with the lowest average low temperature) is January (-6.3°C).
Average pressure in September
Pärnu, Estonia
- Average pressure in September: 1014.4mbar
The month with the highest atmospheric pressure is May (1015.3mbar).
The month with the lowest atmospheric pressure is December (1009.9mbar).
Average wind speed in September
Pärnu, Estonia
- Average wind speed in September: 13.1km/h
The windiest month (with the highest average wind speed) is December (16km/h).
The calmest month (with the lowest average wind speed) is May (11.7km/h).
Average humidity in September
Pärnu, Estonia
- Average humidity in September: 81%
The month with the highest relative humidity is February (93%).
The months with the lowest relative humidity are May and June (72%).
Average rainfall in September
Pärnu, Estonia
- Average rainfall in September: 49mm
The wettest month (with the highest rainfall) is August (59mm).
The driest month (with the least rainfall) is April (27mm).
Average rainfall days in September
Pärnu, Estonia
- Average rainfall days in September: 17.4 days
The month with the highest number of rainy days is July (18.9 days).
The month with the least rainy days is February (7.6 days).
Average snowfall in September
Pärnu, Estonia
- Average snowfall in September: 0mm
The month with the highest snowfall is February (192mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Pärnu, Estonia
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (19.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in September
Pärnu, Estonia
- Average sea temperature in September: 16.3°C
The best month for swimming (with the highest average sea temperature) is July (19.9°C).
The coldest month (with the lowest average sea temperature) is March (-0.2°C).
Average daylight in September /
Average sunshine in September
Pärnu, Estonia
- Average daylight in September: 12h and 48min
The month with the longest days is June (Average daylight: 18h and 12min).
The month with the shortest days is December (Average daylight: 6h and 30min).
- Average sunshine in September: 7h and 24min
The months with the most sunshine are June and July (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 1h and 42min).
Average sunshine days in September
Pärnu, Estonia
- Average sunshine days in September: 10 days
The month with the most sunshine days is May (13.8 days).
The month with the least sunshine days is December (4 days).
Average UV index in September
Pärnu, Estonia
- 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
Pärnu, Estonia
- Average cloud cover in September: 49
The month with the most cloud cover is December (Cloud cover 79).
The months with the least cloud cover are July and August (Cloud cover 38).
Average visibility in September
Pärnu, Estonia
- Average visibility in September: 9km
The months with the highest visibility are May, June, July, August, September and October (9km).
The months with the lowest visibility are January, February and March (7km).
