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
September's arrival brings an average high-temperature of a still comfortable 17.1°C (62.8°F), slightly deviating from August's 18.6°C (65.5°F). Registering an almost steady temperature, Lyme Regis's nights in September see an average low of 12.2°C (54°F).Humidity
In Lyme Regis, the average relative humidity in September is 83%.Rainfall
In September, in Lyme Regis, the rain falls for 12.6 days. Throughout September, 29mm (1.14") of precipitation is accumulated. In Lyme Regis, during the entire year, the rain falls for 180.4 days and collects up to 520mm (20.47") of precipitation.Snowfall
In Lyme Regis, snow does not fall in April through November.Sea temperature
September is the month with the warmest seawater in Lyme Regis, United Kingdom, with an average sea temperature of 16.8°C (62.2°F).Note: Most people do not enjoy swimming in water of 16.8°C (62.2°F). Breathing control becomes harder as the temperature descends from 21°C (69.8°F) to 15°C (59°F).
Daylight
In Lyme Regis, the average length of the day in September is 12h and 37min.On the first day of the month, sunrise is at 6:26 am and sunset at 7:56 pm. On the last day of September, sunrise is at 7:11 am and sunset at 6:51 pm BST.
Sunshine
In Lyme Regis, the average sunshine in September is 8.1h.UV index
The average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.Note: The maximum UV index, 4 during September, leads to the following recommendations:
Guard yourself - Avoiding sunburn is suggested. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
Frequently asked questions
What is the average September temperature in Lyme Regis?
What is the average humidity in September in Lyme Regis?
How much does it rain in Lyme Regis in September?
When it does not snow in Lyme Regis?
When is the sea warmest in Lyme Regis?
How cold is the water in September in Lyme Regis?
How many hours of daylight does Lyme Regis have in September?
What time are sunrise and sunset in September in Lyme Regis?
How many hours of sunshine does Lyme Regis have in September?
What is the UV index reading in September in Lyme Regis?
Average temperature in September
Lyme Regis, United Kingdom
- Average high temperature in September: 17.1°C
The warmest month (with the highest average high temperature) is July (18.8°C).
The month with the lowest average high temperature is February (8.2°C).
- Average low temperature in September: 12.2°C
The month with the highest average low temperature is August (13.8°C).
The coldest month (with the lowest average low temperature) is February (4.5°C).
Average pressure in September
Lyme Regis, 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 (1010.4mbar).
Average wind speed in September
Lyme Regis, United Kingdom
- Average wind speed in September: 18.3km/h
The windiest month (with the highest average wind speed) is December (24.4km/h).
The calmest month (with the lowest average wind speed) is July (16km/h).
Average humidity in September
Lyme Regis, United Kingdom
- Average humidity in September: 83%
The months with the highest relative humidity are January and December (85%).
The month with the lowest relative humidity is April (82%).
Average rainfall in September
Lyme Regis, United Kingdom
- Average rainfall in September: 29mm
The wettest month (with the highest rainfall) is November (67mm).
The driest month (with the least rainfall) is May (27mm).
Average rainfall days in September
Lyme Regis, United Kingdom
- Average rainfall days in September: 12.6 days
The month with the highest number of rainy days is November (17.8 days).
The month with the least rainy days is September (12.6 days).
Average snowfall in September
Lyme Regis, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is January (6mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Lyme Regis, United Kingdom
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in September
Lyme Regis, United Kingdom
- Average sea temperature in September: 16.8°C
The best month for swimming (with the highest average sea temperature) is September (16.8°C).
The coldest month (with the lowest average sea temperature) is March (8.9°C).
Average daylight in September /
Average sunshine in September
Lyme Regis, 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 0min).
The months with the least sunshine are January and November (Average sunshine: 4h and 6min).
Average sunshine days in September
Lyme Regis, United Kingdom
- Average sunshine days in September: 14.7 days
The month with the most sunshine days is September (14.7 days).
The month with the least sunshine days is November (8.7 days).
Average UV index in September
Lyme Regis, United Kingdom
- Average UV index in September: 4
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Lyme Regis, United Kingdom
- Average cloud cover in September: 44
The months with the most cloud cover are January, November and December (Cloud cover 57).
The months with the least cloud cover are April and July (Cloud cover 43).
Average visibility in September
Lyme Regis, United Kingdom
- Average visibility in September: 10km
The months with the highest visibility are February, March, April, June, July, August, September, November and December (10km).
The months with the lowest visibility are January, May and October (9km).
Lyme Regis, United Kingdom
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