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
With the arrival of September, West Grinstead's average high-temperature registers at an enjoyable 18.7°C (65.7°F), indicating a subtle variation from the previous month. West Grinstead observes an average low-temperature of 11.1°C (52°F) during September nights.Humidity
In September, the average relative humidity is 79%.Rainfall
In West Grinstead, United Kingdom, during September, the rain falls for 10.6 days and regularly aggregates up to 20mm (0.79") of precipitation. In West Grinstead, during the entire year, the rain falls for 163.7 days and collects up to 347mm (13.66") of precipitation.Snowfall
May through October are months without snowfall in West Grinstead.Daylight
In September, the average length of the day in West Grinstead is 12h and 38min.On the first day of September, sunrise is at 6:15 am and sunset at 7:46 pm. On the last day of the month, sunrise is at 7:01 am and sunset at 6:41 pm BST.
Sunshine
In September, the average sunshine in West Grinstead is 7.5h.UV index
In September, the average daily maximum UV index in West Grinstead is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for average individuals.Note: The daily high UV index of 4 during September translates into the following recommendations:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in West Grinstead?
What is the average humidity in September in West Grinstead?
How many days does it rain in September in West Grinstead?
When it does not snow in West Grinstead?
What is the average length of the day in September in West Grinstead?
When is the sunrise / sunset in September in West Grinstead?
How long on average sun shines in September in West Grinstead?
What is the UV index intensity in September in West Grinstead?
Average temperature in September
West Grinstead, United Kingdom
- Average high temperature in September: 18.7°C
The warmest month (with the highest average high temperature) is July (21.3°C).
The month with the lowest average high temperature is January (7.2°C).
- Average low temperature in September: 11.1°C
The month with the highest average low temperature is August (13.3°C).
The coldest month (with the lowest average low temperature) is January (2.7°C).
Average pressure in September
West Grinstead, United Kingdom
- Average pressure in September: 1017.2mbar
The month with the highest atmospheric pressure is September (1017.2mbar).
The month with the lowest atmospheric pressure is November (1010.8mbar).
Average wind speed in September
West Grinstead, United Kingdom
- Average wind speed in September: 13.5km/h
The windiest month (with the highest average wind speed) is February (18.1km/h).
The calmest months (with the lowest average wind speed) are July and August (13.3km/h).
Average humidity in September
West Grinstead, United Kingdom
- Average humidity in September: 79%
The month with the highest relative humidity is December (89%).
The months with the lowest relative humidity are July and August (77%).
Average rainfall in September
West Grinstead, United Kingdom
- Average rainfall in September: 20mm
The wettest month (with the highest rainfall) is December (42mm).
The driest month (with the least rainfall) is April (18mm).
Average rainfall days in September
West Grinstead, United Kingdom
- Average rainfall days in September: 10.6 days
The month with the highest number of rainy days is November (16.6 days).
The month with the least rainy days is September (10.6 days).
Average snowfall in September
West Grinstead, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is January (15mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
West Grinstead, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.8 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
West Grinstead, United Kingdom
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 30min).
The month with the shortest days is December (Average daylight: 8h and 0min).
- Average sunshine in September: 7h and 3min
The month with the most sunshine is July (Average sunshine: 8h and 36min).
The month with the least sunshine is February (Average sunshine: 3h and 42min).
Average sunshine days in September
West Grinstead, United Kingdom
- Average sunshine days in September: 16.1 days
The month with the most sunshine days is September (16.1 days).
The months with the least sunshine days are February and November (10.7 days).
Average UV index in September
West Grinstead, United Kingdom
- Average UV index in September: 4
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, November and December (UV index 2).
Average cloud cover in September
West Grinstead, United Kingdom
- Average cloud cover in September: 47
The months with the most cloud cover are February and November (Cloud cover 61).
The months with the least cloud cover are April, July, August and September (Cloud cover 47).
Average visibility in September
West Grinstead, United Kingdom
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
