September weather forecastKarlberg, Sweden
September
Weather in September
September, the first month of the autumn in Karlberg, is still a mild month, with an average temperature fluctuating between 11.5°C (52.7°F) and 15.1°C (59.2°F).Temperature
A minor decrease in the average high-temperature is observed during September, shifting from a refreshing 18.7°C (65.7°F) in August to a mild 15.1°C (59.2°F). Nighttime in Karlberg, during September, brings an average low of 11.5°C (52.7°F), a modest reduction from the day's peak.Humidity
In Karlberg, the average relative humidity in September is 80%.Rainfall
In Karlberg, Sweden, in September, during 11.6 rainfall days, 21mm (0.83") of precipitation is typically accumulated. In Karlberg, Sweden, during the entire year, the rain falls for 125.3 days and collects up to 261mm (10.28") of precipitation.Snowfall
In Karlberg, snow does not fall in June through September.Daylight
In Karlberg, the average length of the day in September is 12h and 51min.On the first day of September, sunrise is at 05:43 and sunset at 19:47. On the last day of the month, sunrise is at 06:49 and sunset at 18:21 CEST.
Sunshine
In Karlberg, the average sunshine in September is 8.3h.UV index
In Karlberg, the average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: The daily maximum UV index of 3 in September interprets into the following advice:
Take necessary precautions - Suggestions to elude sunburn are provided. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Karlberg, Sweden
- Average high temperature in September: 15.1°C
The warmest month (with the highest average high temperature) is July (18.9°C).
The months with the lowest average high temperature are January and February (0.4°C).
- Average low temperature in September: 11.5°C
The month with the highest average low temperature is August (14.8°C).
The coldest month (with the lowest average low temperature) is January (-2.2°C).
Average pressure in September
Karlberg, Sweden
- 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 (1007.8mbar).
Average wind speed in September
Karlberg, Sweden
- Average wind speed in September: 18.9km/h
The windiest month (with the highest average wind speed) is December (24.7km/h).
The calmest month (with the lowest average wind speed) is July (15.8km/h).
Average humidity in September
Karlberg, Sweden
- Average humidity in September: 80%
The months with the highest relative humidity are January, February, November and December (85%).
The months with the lowest relative humidity are April, May and June (77%).
Average rainfall in September
Karlberg, Sweden
- Average rainfall in September: 21mm
The wettest month (with the highest rainfall) is July (35mm).
The driest month (with the least rainfall) is April (10mm).
Average rainfall days in September
Karlberg, Sweden
- Average rainfall days in September: 11.6 days
The month with the highest number of rainy days is August (13.9 days).
The month with the least rainy days is February (5.4 days).
Average snowfall in September
Karlberg, Sweden
- Average snowfall in September: 0mm
The month with the highest snowfall is December (41mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Karlberg, Sweden
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (11 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Karlberg, Sweden
- Average daylight in September: 12h and 48min
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: 8h and 18min
The month with the most sunshine is June (Average sunshine: 12h and 36min).
The month with the least sunshine is December (Average sunshine: 2h and 30min).
Average sunshine days in September
Karlberg, Sweden
- Average sunshine days in September: 14.5 days
The month with the most sunshine days is May (17.9 days).
The month with the least sunshine days is December (11.7 days).
Average UV index in September
Karlberg, Sweden
- Average UV index in September: 3
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January and February (UV index 1).
Average cloud cover in September
Karlberg, Sweden
- Average cloud cover in September: 40
The months with the most cloud cover are January and February (Cloud cover 66).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in September
Karlberg, Sweden
- 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).
