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
A subtle change in temperatures is noted as August gives way to September, with average highs reducing from a pleasant 20.6°C (69.1°F) to a comfortable 16.1°C (61°F). During September in Norrmalm, the average low-temperature is recorded at a chilly 9.7°C (49.5°F).Humidity
In Norrmalm, the average relative humidity in September is 79%.Rainfall
In Norrmalm, during September, the rain falls for 12.3 days and regularly aggregates up to 24mm (0.94") of precipitation. In Norrmalm, during the entire year, the rain falls for 136.6 days and collects up to 352mm (13.86") of precipitation.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September is 12h and 50min.On the first day of September in Norrmalm, sunrise is at 05:45 and sunset at 19:49. On the last day of the month, sunrise is at 06:51 and sunset at 18:23 CEST.
Sunshine
In Norrmalm, the average sunshine in September is 8.1h.UV index
The average daily maximum UV index in September in Norrmalm is 3. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for average individuals.Note: The maximum UV index of 3 during September translates into these guidelines:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. 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
What is the usual temperature for Norrmalm in September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
Does it snow in September?
How many hours of daylight does Norrmalm have in September?
What time are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Norrmalm, 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 (-0.3°C).
- Average low temperature in September: 9.7°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 (-3.6°C).
Average pressure in September
Norrmalm, 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
Norrmalm, Sweden
- Average wind speed in September: 14.1km/h
The windiest month (with the highest average wind speed) is December (18.5km/h).
The calmest month (with the lowest average wind speed) is August (12.5km/h).
Average humidity in September
Norrmalm, Sweden
- Average humidity in September: 79%
The month with the highest relative humidity is December (88%).
The month with the lowest relative humidity is May (71%).
Average rainfall in September
Norrmalm, Sweden
- Average rainfall in September: 24mm
The wettest month (with the highest rainfall) is July (43mm).
The driest month (with the least rainfall) is April (15mm).
Average rainfall days in September
Norrmalm, Sweden
- Average rainfall days in September: 12.3 days
The month with the highest number of rainy days is July (16.3 days).
The month with the least rainy days is February (5 days).
Average snowfall in September
Norrmalm, Sweden
- Average snowfall in September: 0mm
The month with the highest snowfall is February (99mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Norrmalm, Sweden
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (12.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Norrmalm, 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 12min).
The month with the least sunshine is December (Average sunshine: 2h and 30min).
Average sunshine days in September
Norrmalm, Sweden
- Average sunshine days in September: 14.5 days
The months with the most sunshine days are April and May (15.5 days).
The month with the least sunshine days is November (12 days).
Average UV index in September
Norrmalm, 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
Norrmalm, Sweden
- Average cloud cover in September: 43
The month with the most cloud cover is February (Cloud cover 67).
The month with the least cloud cover is August (Cloud cover 37).
Average visibility in September
Norrmalm, 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).
