September weather forecastAlstahaug, Norway
September
Weather in September
September in Alstahaug is a transition period from summer to autumn. With temperatures usually dropping, the amount of rainfall increases to around 94mm (3.7"). The city retains a relative warmth from summer, making it possible to enjoy outdoor activities. September is cherished for its beautiful autumn colors that start to emerge. As daylight hours reduce, the city starts to experience an early winter chill, signifying a farewell to the warm season.Temperature
With the onset of September in Alstahaug, a modest change to a fresh 12.2°C (54°F) from August's 14.5°C (58.1°F) is noted in high-temperature. The nighttime temperature demonstrates a marginal decline, averaging at a frosty 9.8°C (49.6°F) during September.Humidity
In Alstahaug, the average relative humidity in September is 77%.Rainfall
September is the month with the most rainfall. Rain falls for 19 days and accumulates 94mm (3.7") of precipitation.Snowfall
In Alstahaug, snow does not fall in June through September.Daylight
In September, the average length of the day is 13h and 6min.On the first day of the month, sunrise is at 05:47 and sunset at 20:32. On the last day of September, in Alstahaug, sunrise is at 07:19 and sunset at 18:40 CEST.
Sunshine
In Alstahaug, the average sunshine in September is 6.1h.UV index
In September, the average daily maximum UV index is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: In September, the maximum UV index of 3 transforms into these recommendations:
Undertake precautions - It is suggested to shield oneself from sunburn. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Alstahaug, Norway
- Average high temperature in September: 12.2°C
The warmest month (with the highest average high temperature) is August (14.5°C).
The months with the lowest average high temperature are January and February (1.2°C).
- Average low temperature in September: 9.8°C
The month with the highest average low temperature is August (11.9°C).
The coldest months (with the lowest average low temperature) are January and February (-1.5°C).
Average pressure in September
Alstahaug, Norway
- Average pressure in September: 1009.5mbar
The month with the highest atmospheric pressure is May (1014.3mbar).
The month with the lowest atmospheric pressure is December (1001.9mbar).
Average wind speed in September
Alstahaug, Norway
- Average wind speed in September: 20.6km/h
The windiest month (with the highest average wind speed) is January (27.7km/h).
The calmest month (with the lowest average wind speed) is July (15.6km/h).
Average humidity in September
Alstahaug, Norway
- Average humidity in September: 77%
The month with the highest relative humidity is July (80%).
The month with the lowest relative humidity is October (73%).
Average rainfall in September
Alstahaug, Norway
- Average rainfall in September: 94mm
The wettest month (with the highest rainfall) is September (94mm).
The driest month (with the least rainfall) is May (41mm).
Average rainfall days in September
Alstahaug, Norway
- Average rainfall days in September: 19 days
The month with the highest number of rainy days is September (19 days).
The month with the least rainy days is February (8.1 days).
Average snowfall in September
Alstahaug, Norway
- Average snowfall in September: 0mm
The month with the highest snowfall is March (106mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Alstahaug, Norway
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is March (10.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Alstahaug, Norway
- Average daylight in September: 13h and 6min
The month with the longest days is July (Average daylight: 20h and 48min).
The month with the shortest days is December (Average daylight: 3h and 12min).
- Average sunshine in September: 6h and 6min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is December (Average sunshine: 1h and 24min).
Average sunshine days in September
Alstahaug, Norway
- Average sunshine days in September: 9.8 days
The month with the most sunshine days is January (13.1 days).
The months with the least sunshine days are March and September (9.8 days).
Average UV index in September
Alstahaug, Norway
- Average UV index in September: 3
The months with the highest UV index are June and July (UV index 4).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).
Average cloud cover in September
Alstahaug, Norway
- Average cloud cover in September: 58
The month with the most cloud cover is March (Cloud cover 67).
The month with the least cloud cover is August (Cloud cover 51).
Average visibility in September
Alstahaug, Norway
- Average visibility in September: 10km
The months with the highest visibility are June, August, September and October (10km).
The months with the lowest visibility are January, February, March, April, May, July, November and December (9km).
