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
As September arrives, Härnösand's weather displays a minor decrease in high-temperatures, transitioning from August's enjoyable 17.4°C (63.3°F) to a still refreshing 13.7°C (56.7°F). Härnösand, during the September nights, maintains an average temperature of 9.5°C (49.1°F), closely aligned with its daytime readings.Humidity
In September, the average relative humidity is 78%.Rainfall
In Härnösand, during September, the rain falls for 8.8 days and regularly aggregates up to 23mm (0.91") of precipitation. Throughout the year, in Härnösand, there are 93.9 rainfall days, and 304mm (11.97") of precipitation is accumulated.Snowfall
In Härnösand, snow does not fall in June through September.Sea temperature
In Härnösand, in September, the average water temperature is 12.8°C (55°F).Note: You can swim in 12.8°C (55°F) below 10°C (50°F) with proper thermal wear; failing that, the cold shock and respiratory challenges are nearly certain. A short span at 13°C (55.4°F) without it is tough.
Daylight
In September, the average length of the day is 12h and 58min.On the first day of the month, sunrise is at 05:37 and sunset at 19:58. On the last day of September, sunrise is at 06:54 and sunset at 18:21 CEST.
Sunshine
The average sunshine in September in Härnösand is 8.2h.UV index
The average daily maximum UV index in September in Härnösand is 3. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: A maximum high daily UV index of 3 during September translates into the following directions:
Ensure safety - Imperative it is to shield skin and eyes from damage. The Sun's radiation is especially intense around midday; try to stay in shade during this period. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.
Frequently asked questions
What is the average September temperature in Härnösand?
What is the average humidity in September in Härnösand?
How many days does it rain in September in Härnösand?
When it does not snow in Härnösand?
Does it snow in Härnösand in September?
What is the sea water temperature in September in Härnösand?
What is the average length of the day in September in Härnösand?
When is the sunrise / sunset in September in Härnösand?
How long on average sun shines in September in Härnösand?
What is the UV index intensity in September in Härnösand?
Average temperature in September
Härnösand, Sweden
- Average high temperature in September: 13.7°C
The warmest month (with the highest average high temperature) is July (18.2°C).
The month with the lowest average high temperature is February (-1.8°C).
- Average low temperature in September: 9.5°C
The month with the highest average low temperature is July (13.3°C).
The coldest month (with the lowest average low temperature) is February (-5°C).
Average pressure in September
Härnösand, Sweden
- Average pressure in September: 1011.8mbar
The month with the highest atmospheric pressure is May (1014.3mbar).
The month with the lowest atmospheric pressure is December (1005.8mbar).
Average wind speed in September
Härnösand, Sweden
- Average wind speed in September: 15.7km/h
The windiest month (with the highest average wind speed) is December (18.8km/h).
The calmest months (with the lowest average wind speed) are May and August (13.9km/h).
Average humidity in September
Härnösand, Sweden
- Average humidity in September: 78%
The month with the highest relative humidity is February (87%).
The month with the lowest relative humidity is June (71%).
Average rainfall in September
Härnösand, Sweden
- Average rainfall in September: 23mm
The wettest months (with the highest rainfall) are January and December (36mm).
The driest months (with the least rainfall) are April and June (15mm).
Average rainfall days in September
Härnösand, Sweden
- Average rainfall days in September: 8.8 days
The month with the highest number of rainy days is July (10.4 days).
The month with the least rainy days is February (4.8 days).
Average snowfall in September
Härnösand, Sweden
- Average snowfall in September: 0mm
The month with the highest snowfall is January (150mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Härnösand, Sweden
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (14.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in September
Härnösand, Sweden
- Average sea temperature in September: 12.8°C
The best month for swimming (with the highest average sea temperature) is August (17°C).
The coldest months (with the lowest average sea temperature) are February and March (0.3°C).
Average daylight in September /
Average sunshine in September
Härnösand, Sweden
- Average daylight in September: 13h and 0min
The month with the longest days is June (Average daylight: 19h and 54min).
The month with the shortest days is December (Average daylight: 5h and 6min).
- Average sunshine in September: 8h and 1min
The month with the most sunshine is June (Average sunshine: 13h and 6min).
The month with the least sunshine is December (Average sunshine: 1h and 48min).
Average sunshine days in September
Härnösand, Sweden
- Average sunshine days in September: 19.9 days
The month with the most sunshine days is June (21.8 days).
The month with the least sunshine days is February (10.8 days).
Average UV index in September
Härnösand, Sweden
- 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 and November (UV index 1).
Average cloud cover in September
Härnösand, Sweden
- Average cloud cover in September: 43
The month with the most cloud cover is January (Cloud cover 62).
The months with the least cloud cover are July and August (Cloud cover 37).
Average visibility in September
Härnösand, Sweden
- Average visibility in September: 10km
The months with the highest visibility are May, June, July, August, September and October (10km).
The month with the lowest visibility is January (8km).
Härnösand, Sweden
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