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
With September's onset, the weather reveals a slight temperature decrease, transitioning from an agreeable 20.5°C (68.9°F) in August to a comfortable 16.1°C (61°F). Kallhäll reports an average nighttime low-temperature of 9.6°C (49.3°F) in September.Humidity
The average relative humidity in September in Kallhäll, Sweden, is 80%.Rainfall
In Kallhäll, in September, during 13.4 rainfall days, 27mm (1.06") of precipitation is typically accumulated. In Kallhäll, during the entire year, the rain falls for 133.7 days and collects up to 340mm (13.39") of precipitation.Snowfall
June through September are months without snowfall in Kallhäll.Daylight
The average length of the day in September in Kallhäll is 12h and 50min.On the first day of September, sunrise is at 05:46 and sunset at 19:50. On the last day of the month, sunrise is at 06:52 and sunset at 18:24 CEST.
Sunshine
The average sunshine in September is 8.1h.UV index
In September, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: The daily high UV index of 3 during September translates into the following recommendations:
Take measures. Individuals with light skin might experience burns in under 30 minutes. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Kallhäll?
What is the average humidity in September in Kallhäll?
How many days does it rain in September in Kallhäll?
When it does not snow in Kallhäll?
Does it snow in Kallhäll in September?
What is the average length of the day in September in Kallhäll?
What time are sunrise and sunset in September in Kallhäll?
How long on average sun shines in September in Kallhäll?
What is the UV index intensity in September in Kallhäll?
Average temperature in September
Kallhäll, Sweden
- Average high temperature in September: 16.1°C
The warmest month (with the highest average high temperature) is July (21.3°C).
The month with the lowest average high temperature is January (-0.5°C).
- Average low temperature in September: 9.6°C
The month with the highest average low temperature is July (13.2°C).
The coldest month (with the lowest average low temperature) is January (-3.9°C).
Average pressure in September
Kallhäll, Sweden
- Average pressure in September: 1013.4mbar
The month with the highest atmospheric pressure is May (1014.8mbar).
The month with the lowest atmospheric pressure is December (1007.8mbar).
Average wind speed in September
Kallhäll, Sweden
- Average wind speed in September: 13.8km/h
The windiest month (with the highest average wind speed) is December (18km/h).
The calmest months (with the lowest average wind speed) are July and August (12.3km/h).
Average humidity in September
Kallhäll, Sweden
- Average humidity in September: 80%
The months with the highest relative humidity are January, February and December (88%).
The month with the lowest relative humidity is May (72%).
Average rainfall in September
Kallhäll, Sweden
- Average rainfall in September: 27mm
The wettest month (with the highest rainfall) is July (43mm).
The driest month (with the least rainfall) is April (13mm).
Average rainfall days in September
Kallhäll, Sweden
- Average rainfall days in September: 13.4 days
The months with the highest number of rainy days are July and August (15.7 days).
The month with the least rainy days is February (5.3 days).
Average snowfall in September
Kallhäll, Sweden
- Average snowfall in September: 0mm
The month with the highest snowfall is February (86mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Kallhäll, Sweden
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (11.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Kallhäll, Sweden
- 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: 8h and 1min
The month with the most sunshine is June (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 2h and 30min).
Average sunshine days in September
Kallhäll, Sweden
- Average sunshine days in September: 13.5 days
The month with the most sunshine days is May (17.9 days).
The months with the least sunshine days are July and November (12.5 days).
Average UV index in September
Kallhäll, Sweden
- 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 and February (UV index 1).
Average cloud cover in September
Kallhäll, Sweden
- Average cloud cover in September: 43
The month with the most cloud cover is February (Cloud cover 66).
The month with the least cloud cover is August (Cloud cover 38).
Average visibility in September
Kallhäll, Sweden
- Average visibility in September: 9km
The month with the highest visibility is June (10km).
The months with the lowest visibility are January, February, March, April, May, July, August, September, October, November and December (9km).
