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
The advent of September sees the average high-temperature at a still comfortable 16.8°C (62.2°F), subtly shifted from August's 18.2°C (64.8°F). Weymouth's average temperature throughout the nights in September exhibits a minor decrease from daytime highs, stabilizing at a mild 14°C (57.2°F).Humidity
February through April, September through December, with an average relative humidity of 81%, are the least humid months in Weymouth.Rainfall
In Weymouth, during September, the rain falls for 11.1 days and regularly aggregates up to 29mm (1.14") of precipitation. Throughout the year, there are 167.3 rainfall days, and 471mm (18.54") of precipitation is accumulated.Snowfall
March through October and December are months without snowfall.Sea temperature
With an average sea temperature of 17.1°C (62.8°F), September is the month with the warmest seawater in Weymouth.Note: Swimming in water of 17.1°C (62.8°F) is not enjoyable for the majority of individuals. Breathing control becomes increasingly challenging as the temperature dips from 21°C (69.8°F) to 15°C (59°F).
Daylight
In Weymouth, the average length of the day in September is 12h and 37min.On the first day of the month, sunrise is at 6:24 am and sunset at 7:54 pm. On the last day of September, sunrise is at 7:09 am and sunset at 6:49 pm BST.
Sunshine
In September, the average sunshine in Weymouth is 8.1h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for average individuals.Note: The daily maximum UV index of 4 in September interprets into the following advice:
Act with care - Obligation to protect against skin and eye damage is highlighted. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
Frequently asked questions
What is the usual temperature for Weymouth in September?
What is the least humid month in Weymouth?
What is the average humidity in September in Weymouth?
How many days does it rain in September in Weymouth?
When it does not snow in Weymouth?
When is the sea warmest in Weymouth?
What is the sea temperature in September in Weymouth?
What is the average length of the day in September in Weymouth?
When is the sunrise / sunset in September in Weymouth?
How long on average sun shines in September in Weymouth?
What is the UV index intensity in September in Weymouth?
Average temperature in September
Weymouth, United Kingdom
- Average high temperature in September: 16.8°C
The warmest month (with the highest average high temperature) is August (18.2°C).
The month with the lowest average high temperature is February (8.3°C).
- Average low temperature in September: 14°C
The month with the highest average low temperature is August (15.3°C).
The coldest month (with the lowest average low temperature) is February (5.8°C).
Average pressure in September
Weymouth, United Kingdom
- Average pressure in September: 1017.3mbar
The month with the highest atmospheric pressure is September (1017.3mbar).
The month with the lowest atmospheric pressure is November (1010.6mbar).
Average wind speed in September
Weymouth, United Kingdom
- Average wind speed in September: 22.8km/h
The windiest month (with the highest average wind speed) is December (30.1km/h).
The calmest month (with the lowest average wind speed) is July (19.5km/h).
Average humidity in September
Weymouth, United Kingdom
- Average humidity in September: 81%
The months with the highest relative humidity are June and July (83%).
The months with the lowest relative humidity are February, March, April, September, October, November and December (81%).
Average rainfall in September
Weymouth, United Kingdom
- Average rainfall in September: 29mm
The wettest month (with the highest rainfall) is November (58mm).
The driest month (with the least rainfall) is May (27mm).
Average rainfall days in September
Weymouth, United Kingdom
- Average rainfall days in September: 11.1 days
The month with the highest number of rainy days is November (17 days).
The month with the least rainy days is September (11.1 days).
Average snowfall in September
Weymouth, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is February (2mm).
The months with the least snowfall are March, April, May, June, July, August, September, October and December (0mm).
Average snowfall days in September
Weymouth, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.2 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in September
Weymouth, United Kingdom
- Average sea temperature in September: 17.1°C
The best month for swimming (with the highest average sea temperature) is September (17.1°C).
The coldest month (with the lowest average sea temperature) is March (8.8°C).
Average daylight in September /
Average sunshine in September
Weymouth, United Kingdom
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 24min).
The month with the shortest days is December (Average daylight: 8h and 6min).
- Average sunshine in September: 8h and 1min
The month with the most sunshine is July (Average sunshine: 9h and 24min).
The months with the least sunshine are January, February and November (Average sunshine: 4h and 6min).
Average sunshine days in September
Weymouth, 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 November (10.1 days).
Average UV index in September
Weymouth, United Kingdom
- Average UV index in September: 4
The months with the highest UV index are July and August (UV index 5).
The months with the lowest UV index are January and February (UV index 2).
Average cloud cover in September
Weymouth, United Kingdom
- Average cloud cover in September: 43
The month with the most cloud cover is December (Cloud cover 59).
The month with the least cloud cover is July (Cloud cover 40).
Average visibility in September
Weymouth, United Kingdom
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
Weymouth, United Kingdom
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