September weather forecastUumaa, Sweden
September
Weather in September
The first month of the autumn, September, is still a cool month in Uumaa, Sweden, with an average temperature fluctuating between 12.2°C (54°F) and 5.4°C (41.7°F).Temperature
September's arrival comes with a decrease in the average high-temperature, moving from a comfortable 17.6°C (63.7°F) in August to a fresh 12.2°C (54°F). In September, Uumaa reports a consistent average low-temperature of 5.4°C (41.7°F) during the nights.Humidity
The average relative humidity in September in Uumaa is 84%.Rainfall
In Uumaa, in September, it is raining for 13.3 days, with typically 40mm (1.57") of accumulated precipitation. Throughout the year, in Uumaa, Sweden, there are 114.3 rainfall days, and 441mm (17.36") of precipitation is accumulated.Snowfall
Months with snowfall in Uumaa are January through June, September through December. September is the first month it typically snows in Uumaa, Sweden. Throughout September, in the average 0.3 snowfall days, it receives 5mm (0.2") of snow. In Uumaa, during the entire year, snow falls for 114.9 days and aggregates up to 1412mm (55.59") of snow.Daylight
In Uumaa, the average length of the day in September is 13h and 8min.On the first day of September in Uumaa, sunrise is at 05:01 and sunset at 19:51. On the last day of the month, sunrise is at 06:36 and sunset at 17:56 CEST.
Sunshine
In September, the average sunshine in Uumaa is 6.3h.UV index
In Uumaa, the average daily maximum UV index in September is 2. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for the ordinary person.Note: A maximum high UV index of 2 in September translates into the following recommendations:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. It's recommended to limit sun exposure when its radiation is at its peak during midday. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Uumaa, Sweden
- Average high temperature in September: 12.2°C
The warmest month (with the highest average high temperature) is July (19.8°C).
The month with the lowest average high temperature is January (-8.2°C).
- Average low temperature in September: 5.4°C
The month with the highest average low temperature is July (10.9°C).
The coldest month (with the lowest average low temperature) is January (-13.8°C).
Average pressure in September
Uumaa, Sweden
- Average pressure in September: 1010.8mbar
The month with the highest atmospheric pressure is May (1014mbar).
The month with the lowest atmospheric pressure is December (1004.8mbar).
Average wind speed in September
Uumaa, Sweden
- Average wind speed in September: 10km/h
The windiest month (with the highest average wind speed) is March (10.8km/h).
The calmest month (with the lowest average wind speed) is April (9.2km/h).
Average humidity in September
Uumaa, Sweden
- Average humidity in September: 84%
The months with the highest relative humidity are January and February (96%).
The month with the lowest relative humidity is June (65%).
Average rainfall in September
Uumaa, Sweden
- Average rainfall in September: 40mm
The wettest months (with the highest rainfall) are July and December (47mm).
The driest month (with the least rainfall) is April (27mm).
Average rainfall days in September
Uumaa, Sweden
- Average rainfall days in September: 13.3 days
The month with the highest number of rainy days is July (15.6 days).
The month with the least rainy days is January (2.4 days).
Average snowfall in September
Uumaa, Sweden
- Average snowfall in September: 5mm
The month with the highest snowfall is December (319mm).
The months with the least snowfall are July and August (0mm).
Average snowfall days in September
Uumaa, Sweden
- Average snowfall days in September: 0.3 days
The month with the highest number of snowfall days is December (20.5 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Uumaa, Sweden
- Average daylight in September: 13h and 6min
The month with the longest days is May (Average daylight: 19h and 42min).
The month with the shortest days is December (Average daylight: 2h and 36min).
- Average sunshine in September: 6h and 18min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is December (Average sunshine: 1h and 6min).
Average sunshine days in September
Uumaa, Sweden
- Average sunshine days in September: 13.4 days
The month with the most sunshine days is October (16 days).
The month with the least sunshine days is April (7.6 days).
Average UV index in September
Uumaa, Sweden
- Average UV index in September: 2
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, March, October, November and December (UV index 1).
Average cloud cover in September
Uumaa, Sweden
- Average cloud cover in September: 58
The month with the most cloud cover is January (Cloud cover 74).
The month with the least cloud cover is July (Cloud cover 47).
Average visibility in September
Uumaa, Sweden
- Average visibility in September: 8km
The months with the highest visibility are May, June and July (9km).
The months with the lowest visibility are January, February, March, April and December (5km).
