September weather forecastAlunda, Sweden
September
Weather in September
The first month of the autumn, September, is still a refreshing month in Alunda, Sweden, with temperature in the range of an average high of 15.2°C (59.4°F) and an average low of 10.8°C (51.4°F).Temperature
The arrival of September signals a subtle shift in temperature, down from an enjoyable 19.6°C (67.3°F) in August to a still refreshing 15.2°C (59.4°F). In Alunda, a slight decrease from the daytime peak is noted during the month of September, with an average low-temperature of 10.8°C (51.4°F).Humidity
In Alunda, the average relative humidity in September is 79%.Rainfall
In September, in Alunda, Sweden, the rain falls for 13.5 days. Throughout September, 24mm (0.94") of precipitation is accumulated. Throughout the year, there are 136.5 rainfall days, and 345mm (13.58") of precipitation is accumulated.Snowfall
June through September are months without snowfall.Sea temperature
In Alunda, the average seawater temperature in September is 14°C (57.2°F).Note: Swimming at temperatures less than 10°C (50°F) in 14°C (57.2°F) is feasible with the right swimsuit; if not, expect cold shock and breathlessness. A quick swim at 13°C (55.4°F) without adequate warmth can be discomforting.
Daylight
In Alunda, Sweden, the average length of the day in September is 12h and 52min.On the first day of the month, sunrise is at 05:43 and sunset at 19:51. On the last day of September, sunrise is at 06:52 and sunset at 18:22 CEST.
Sunshine
The average sunshine in September is 8.3h.UV index
In Alunda, Sweden, the average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for average individuals.Note: In September, a daily maximum UV index of 3 leads to the following instructions:
Ensure safety - Imperative it is to shield skin and eyes from damage. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Alunda, Sweden
- Average high temperature in September: 15.2°C
The warmest month (with the highest average high temperature) is July (19.7°C).
The months with the lowest average high temperature are January and February (-0.1°C).
- Average low temperature in September: 10.8°C
The month with the highest average low temperature is August (13.8°C).
The coldest month (with the lowest average low temperature) is February (-2.9°C).
Average pressure in September
Alunda, Sweden
- Average pressure in September: 1012.9mbar
The month with the highest atmospheric pressure is May (1014.7mbar).
The month with the lowest atmospheric pressure is December (1007.1mbar).
Average wind speed in September
Alunda, Sweden
- Average wind speed in September: 16.6km/h
The windiest month (with the highest average wind speed) is December (20.3km/h).
The calmest month (with the lowest average wind speed) is July (14.2km/h).
Average humidity in September
Alunda, Sweden
- Average humidity in September: 79%
The month with the highest relative humidity is February (87%).
The months with the lowest relative humidity are May and June (74%).
Average rainfall in September
Alunda, Sweden
- Average rainfall in September: 24mm
The wettest month (with the highest rainfall) is July (52mm).
The driest months (with the least rainfall) are February and April (16mm).
Average rainfall days in September
Alunda, Sweden
- Average rainfall days in September: 13.5 days
The month with the highest number of rainy days is August (16.5 days).
The month with the least rainy days is February (4.3 days).
Average snowfall in September
Alunda, Sweden
- Average snowfall in September: 0mm
The month with the highest snowfall is March (78mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Alunda, Sweden
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (12.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in September
Alunda, Sweden
- Average sea temperature in September: 14°C
The best month for swimming (with the highest average sea temperature) is August (18.2°C).
The coldest month (with the lowest average sea temperature) is February (0.1°C).
Average daylight in September /
Average sunshine in September
Alunda, Sweden
- Average daylight in September: 12h and 54min
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 18min
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 30min).
Average sunshine days in September
Alunda, Sweden
- Average sunshine days in September: 14 days
The month with the most sunshine days is April (15.8 days).
The month with the least sunshine days is December (11.6 days).
Average UV index in September
Alunda, 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
Alunda, Sweden
- Average cloud cover in September: 42
The month with the most cloud cover is January (Cloud cover 67).
The months with the least cloud cover are July and August (Cloud cover 37).
Average visibility in September
Alunda, 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).
