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 sea temperature 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
Weather in September
Temperature
September in Tønsberg, Norway, is characterized by a mild reduction in the average high-temperature, from an enjoyable 18.4°C (65.1°F) in August to a still refreshing 15.3°C (59.5°F). Tønsberg's nighttime temperature in September experiences a slight dip from daytime highs, falling to an average of 10.8°C (51.4°F).Humidity
In Tønsberg, the average relative humidity in September is 77%.Rainfall
In Tønsberg, during September, the rain falls for 11.1 days and regularly aggregates up to 55mm (2.17") of precipitation. Throughout the year, in Tønsberg, there are 130.2 rainfall days, and 549mm (21.61") of precipitation is accumulated.Snowfall
In Tønsberg, Norway, snow does not fall in May through September.Sea temperature
In Tønsberg, in September, the average water temperature is 15.8°C (60.4°F).Note: Swimming in 15.8°C (60.4°F) is not a pleasurable activity for the majority of people. Breathing becomes increasingly challenging as water temperature descends from 21°C (69.8°F) to 15°C (59°F).
Daylight
The average length of the day in September is 12h and 50min.On the first day of the month, sunrise is at 06:16 and sunset at 20:19. On the last day of September, in Tønsberg, sunrise is at 07:22 and sunset at 18:54 CEST.
Sunshine
In September, the average sunshine in Tønsberg is 8.3h.UV index
In September, the average daily maximum UV index in Tønsberg is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for average individuals.Note: The maximum UV index of 3 during September leads to these instructions:
Undertake protective steps - Preventing sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Frequently asked questions
What are September temperatures in Tønsberg?
What is the average humidity in September in Tønsberg?
How many days does it rain in September in Tønsberg?
When it does not snow in Tønsberg?
Does it snow in Tønsberg in September?
How cold is the water in September in Tønsberg?
What is the average length of the day in September in Tønsberg?
What time are sunrise and sunset in September in Tønsberg?
How many hours of sunshine does Tønsberg have in September?
What is the UV index reading in September in Tønsberg?
Average temperature in September
Tønsberg, Norway
- Average high temperature in September: 15.3°C
The warmest month (with the highest average high temperature) is July (19.1°C).
The month with the lowest average high temperature is February (0.3°C).
- Average low temperature in September: 10.8°C
The month with the highest average low temperature is July (13.7°C).
The coldest month (with the lowest average low temperature) is February (-3°C).
Average pressure in September
Tønsberg, Norway
- Average pressure in September: 1012.8mbar
The month with the highest atmospheric pressure is April (1014.4mbar).
The month with the lowest atmospheric pressure is December (1008mbar).
Average wind speed in September
Tønsberg, Norway
- Average wind speed in September: 16.7km/h
The windiest months (with the highest average wind speed) are November and December (19.7km/h).
The calmest month (with the lowest average wind speed) is July (13.9km/h).
Average humidity in September
Tønsberg, Norway
- Average humidity in September: 77%
The month with the highest relative humidity is February (85%).
The months with the lowest relative humidity are April and May (72%).
Average rainfall in September
Tønsberg, Norway
- Average rainfall in September: 55mm
The wettest month (with the highest rainfall) is November (65mm).
The driest month (with the least rainfall) is April (23mm).
Average rainfall days in September
Tønsberg, Norway
- Average rainfall days in September: 11.1 days
The month with the highest number of rainy days is July (15.2 days).
The month with the least rainy days is February (5.9 days).
Average snowfall in September
Tønsberg, Norway
- Average snowfall in September: 0mm
The month with the highest snowfall is January (111mm).
The months with the least snowfall are May, June, July, August and September (0mm).
Average snowfall days in September
Tønsberg, Norway
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average sea temperature in September
Tønsberg, Norway
- Average sea temperature in September: 15.8°C
The best month for swimming (with the highest average sea temperature) is August (18.4°C).
The coldest month (with the lowest average sea temperature) is March (2.8°C).
Average daylight in September /
Average sunshine in September
Tønsberg, Norway
- 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 18min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is June (Average sunshine: 11h and 36min).
The month with the least sunshine is December (Average sunshine: 3h and 24min).
Average sunshine days in September
Tønsberg, Norway
- Average sunshine days in September: 17.3 days
The month with the most sunshine days is April (19.9 days).
The months with the least sunshine days are June and July (13.4 days).
Average UV index in September
Tønsberg, Norway
- 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, February, March, October, November and December (UV index 2).
Average cloud cover in September
Tønsberg, Norway
- Average cloud cover in September: 41
The month with the most cloud cover is February (Cloud cover 59).
The months with the least cloud cover are June, July and August (Cloud cover 36).
Average visibility in September
Tønsberg, Norway
- 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).
Tønsberg, Norway
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