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
September
Weather in September
Temperature
The arrival of September brings an average high-temperature of an enjoyable 18.1°C (64.6°F), closely following the temperature pattern of August. Simpson records a steady low-temperature average of 10.4°C (50.7°F) during September.Humidity
In Simpson, the average relative humidity in September is 80%.Rainfall
The month with the least rainfall is September, when the rain falls for 10 days and typically collects 15mm (0.59") of precipitation.Snowfall
In Simpson, snow does not fall in May through November.Daylight
The average length of the day in September in Simpson is 12h and 39min.On the first day of the month, sunrise is at 6:15 am and sunset at 7:49 pm. On the last day of September, sunrise is at 7:03 am and sunset at 6:42 pm BST.
Sunshine
The average sunshine in September in Simpson, United Kingdom, is 6.9h.UV index
The months with the highest UV index are May through September, with an average maximum UV index of 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 4 in September converts into the following recommendations:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Simpson?
What is the average humidity in September in Simpson?
What is the driest month in Simpson?
How many days does it rain in September in Simpson?
When it does not snow in Simpson?
How many hours of daylight does Simpson have in September?
When are sunrise and sunset in September in Simpson?
How many hours of sunshine does Simpson have in September?
What are the months with the highest UV index in Simpson?
What is the UV index reading in September in Simpson?
Average temperature in September
Simpson, United Kingdom
- Average high temperature in September: 18.1°C
The warmest month (with the highest average high temperature) is July (20.9°C).
The month with the lowest average high temperature is January (6.1°C).
- Average low temperature in September: 10.4°C
The month with the highest average low temperature is August (12.8°C).
The coldest month (with the lowest average low temperature) is January (1.5°C).
Average pressure in September
Simpson, United Kingdom
- Average pressure in September: 1016.6mbar
The months with the highest atmospheric pressure are May and September (1016.6mbar).
The month with the lowest atmospheric pressure is November (1010.1mbar).
Average wind speed in September
Simpson, United Kingdom
- Average wind speed in September: 13.4km/h
The windiest month (with the highest average wind speed) is December (18.7km/h).
The calmest month (with the lowest average wind speed) is July (12.9km/h).
Average humidity in September
Simpson, United Kingdom
- Average humidity in September: 80%
The month with the highest relative humidity is December (91%).
The month with the lowest relative humidity is August (78%).
Average rainfall in September
Simpson, United Kingdom
- Average rainfall in September: 15mm
The wettest month (with the highest rainfall) is June (36mm).
The driest month (with the least rainfall) is September (15mm).
Average rainfall days in September
Simpson, United Kingdom
- Average rainfall days in September: 10 days
The month with the highest number of rainy days is July (16.5 days).
The month with the least rainy days is February (9.9 days).
Average snowfall in September
Simpson, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is February (11mm).
The months with the least snowfall are May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Simpson, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (2.7 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
Simpson, United Kingdom
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 42min).
The month with the shortest days is December (Average daylight: 7h and 48min).
- Average sunshine in September: 6h and 5min
The month with the most sunshine is July (Average sunshine: 7h and 30min).
The month with the least sunshine is February (Average sunshine: 3h and 42min).
Average sunshine days in September
Simpson, United Kingdom
- Average sunshine days in September: 16.4 days
The month with the most sunshine days is March (16.5 days).
The month with the least sunshine days is August (10.3 days).
Average UV index in September
Simpson, 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, November and December (UV index 2).
Average cloud cover in September
Simpson, United Kingdom
- Average cloud cover in September: 51
The month with the most cloud cover is November (Cloud cover 62).
The month with the least cloud cover is September (Cloud cover 51).
Average visibility in September
Simpson, 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).
