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 the arrival of September, Älmsta notices a mild change in the average high-temperature, sliding from August's enjoyable 19.5°C (67.1°F) to a still refreshing 15.2°C (59.4°F). Älmsta registers a steady nighttime temperature averaging a fresh 10.9°C (51.6°F) throughout September.Humidity
In September, the average relative humidity is 79%.Rainfall
In Älmsta, in September, during 13.3 rainfall days, 25mm (0.98") of precipitation is typically accumulated. In Älmsta, during the entire year, the rain falls for 140.1 days and collects up to 354mm (13.94") of precipitation.Snowfall
In Älmsta, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 52min.On the first day of September, sunrise is at 05:41 and sunset at 19:48. On the last day of the month, sunrise is at 06:49 and sunset at 18:20 CEST.
Sunshine
The average sunshine in September in Älmsta is 8.3h.UV index
In Älmsta, the average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum daily UV index of 3 during September translates into the following directions:
Exercise caution. Those with pale skin may experience burns in less than half an hour. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Älmsta?
What is the average humidity in September in Älmsta?
How many days does it rain in September in Älmsta?
When it does not snow in Älmsta?
Does it snow in Älmsta in September?
What is the average length of the day in September in Älmsta?
What time are sunrise and sunset in September in Älmsta?
How long on average sun shines in September in Älmsta?
How high is the UV index in September in Älmsta?
Average temperature in September
Älmsta, Sweden
- Average high temperature in September: 15.2°C
The warmest months (with the highest average high temperature) are July and August (19.5°C).
The month with the lowest average high temperature is January (0.2°C).
- Average low temperature in September: 10.9°C
The months with the highest average low temperature are July and August (14.1°C).
The coldest months (with the lowest average low temperature) are January and February (-2.5°C).
Average pressure in September
Älmsta, Sweden
- Average pressure in September: 1013.2mbar
The month with the highest atmospheric pressure is May (1014.9mbar).
The month with the lowest atmospheric pressure is December (1007.5mbar).
Average wind speed in September
Älmsta, Sweden
- Average wind speed in September: 17.1km/h
The windiest month (with the highest average wind speed) is December (21.8km/h).
The calmest month (with the lowest average wind speed) is July (14.3km/h).
Average humidity in September
Älmsta, Sweden
- Average humidity in September: 79%
The months with the highest relative humidity are February and November (86%).
The months with the lowest relative humidity are April, May and June (75%).
Average rainfall in September
Älmsta, Sweden
- Average rainfall in September: 25mm
The wettest month (with the highest rainfall) is July (52mm).
The driest month (with the least rainfall) is April (16mm).
Average rainfall days in September
Älmsta, Sweden
- Average rainfall days in September: 13.3 days
The month with the highest number of rainy days is August (16.2 days).
The month with the least rainy days is February (5.8 days).
Average snowfall in September
Älmsta, Sweden
- Average snowfall in September: 0mm
The month with the highest snowfall is February (82mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Älmsta, Sweden
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (11.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Älmsta, Sweden
- Average daylight in September: 12h and 5min
The month with the longest days is June (Average daylight: 18h and 42min).
The month with the shortest days is December (Average daylight: 6h and 0min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is June (Average sunshine: 12h and 42min).
The month with the least sunshine is December (Average sunshine: 2h and 24min).
Average sunshine days in September
Älmsta, Sweden
- Average sunshine days in September: 13.2 days
The month with the most sunshine days is May (14.5 days).
The month with the least sunshine days is August (11.3 days).
Average UV index in September
Älmsta, 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
Älmsta, Sweden
- Average cloud cover in September: 41
The month with the most cloud cover is January (Cloud cover 66).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in September
Älmsta, Sweden
- Average visibility in September: 10km
The months with the highest visibility are June, July, August, September and October (10km).
The months with the lowest visibility are January, February, March, April, May, November and December (9km).
