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 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
The transition into September notes an average high-temperature of a comfortable 17.9°C (64.2°F), revealing a mild distinction from the 20.3°C (68.5°F) in August. Throughout September, the temperature falls to an average low of 10.6°C (51.1°F).Humidity
In September, the average relative humidity is 79%.Rainfall
In Harmston, United Kingdom, in September, it is raining for 11.2 days, with typically 22mm (0.87") of accumulated precipitation. Throughout the year, there are 158.5 rainfall days, and 307mm (12.09") of precipitation is accumulated.Snowfall
April through October are months without snowfall in Harmston.Daylight
In Harmston, the average length of the day in September is 12h and 40min.On the first day of the month, sunrise is at 6:13 am and sunset at 7:51 pm. On the last day of September, in Harmston, United Kingdom, sunrise is at 7:02 am and sunset at 6:41 pm BST.
Sunshine
In Harmston, the average sunshine in September is 6.9h.UV index
May through September, with an average maximum UV index of 4, are months with the highest UV index. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum daily UV index of 4 in September interprets into the following recommendations:
Put precautions into practice - Guidance to elude sunburn is provided. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Frequently asked questions
What is the average September temperature in Harmston?
What is the average humidity in September in Harmston?
How many days does it rain in September in Harmston?
When it does not snow in Harmston?
How many hours of daylight does Harmston have in September?
When are sunrise and sunset in September in Harmston?
How many hours of sunshine does Harmston have in September?
When is the highest UV index in Harmston?
What is the UV index intensity in September in Harmston?
Average temperature in September
Harmston, United Kingdom
- Average high temperature in September: 17.9°C
The warmest months (with the highest average high temperature) are July and August (20.3°C).
The month with the lowest average high temperature is January (5.8°C).
- Average low temperature in September: 10.6°C
The month with the highest average low temperature is August (12.9°C).
The coldest month (with the lowest average low temperature) is January (1.7°C).
Average pressure in September
Harmston, United Kingdom
- Average pressure in September: 1015.8mbar
The month with the highest atmospheric pressure is May (1016.4mbar).
The month with the lowest atmospheric pressure is November (1009.4mbar).
Average wind speed in September
Harmston, United Kingdom
- Average wind speed in September: 13.6km/h
The windiest months (with the highest average wind speed) are February and December (18.3km/h).
The calmest month (with the lowest average wind speed) is July (12.6km/h).
Average humidity in September
Harmston, United Kingdom
- Average humidity in September: 79%
The month with the highest relative humidity is December (90%).
The month with the lowest relative humidity is August (76%).
Average rainfall in September
Harmston, United Kingdom
- Average rainfall in September: 22mm
The wettest month (with the highest rainfall) is June (37mm).
The driest month (with the least rainfall) is April (15mm).
Average rainfall days in September
Harmston, United Kingdom
- Average rainfall days in September: 11.2 days
The month with the highest number of rainy days is July (16.4 days).
The month with the least rainy days is February (11.1 days).
Average snowfall in September
Harmston, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is February (30mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Harmston, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Harmston, United Kingdom
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 54min).
The month with the shortest days is December (Average daylight: 7h and 36min).
- Average sunshine in September: 6h and 5min
The month with the most sunshine is August (Average sunshine: 7h and 42min).
The month with the least sunshine is February (Average sunshine: 3h and 48min).
Average sunshine days in September
Harmston, United Kingdom
- Average sunshine days in September: 15.6 days
The month with the most sunshine days is September (15.6 days).
The month with the least sunshine days is July (10.2 days).
Average UV index in September
Harmston, United Kingdom
- Average UV index in September: 4
The months with the highest UV index are May, June, July, August and September (UV index 4).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in September
Harmston, United Kingdom
- Average cloud cover in September: 50
The months with the most cloud cover are February and November (Cloud cover 61).
The month with the least cloud cover is September (Cloud cover 50).
Average visibility in September
Harmston, United Kingdom
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, July, August, September, October and December (9km).
The months with the lowest visibility are June and November (8km).
Harmston, United Kingdom
Weather forecast for your location
2. Allow the app to use your location
