September weather forecastPenryn, United Kingdom
September weather for Penryn, United Kingdom: September, the first month of the autumn in Penryn, is also an enjoyable month, with an average temperature ranging between max 16.5°C (61.7°F) and min 14.4°C (57.9°F). In Penryn, United Kingdom, the average seawater temperature in September is 16.3°C (61.3°F).
September
Weather in September
September, the first month of the autumn in Penryn, is also an enjoyable month, with an average temperature ranging between max 16.5°C (61.7°F) and min 14.4°C (57.9°F).Temperature
September begins with an average high-temperature of a still enjoyable 16.5°C (61.7°F), reflecting close similarity to the preceding month. In Penryn, the month of September records an average minimum temperature of 14.4°C (57.9°F), a slight dip from the daily highs.Humidity
The average relative humidity in September in Penryn, United Kingdom, is 83%.Rainfall
In Penryn, in September, during 9.9 rainfall days, 19mm (0.75") of precipitation is typically accumulated. In Penryn, during the entire year, the rain falls for 159.4 days and collects up to 367mm (14.45") of precipitation.Snowfall
In Penryn, snow does not fall in January, March through November.Sea temperature
In Penryn, the average seawater temperature in September is 16.3°C (61.3°F).Note: For the majority, swimming in water with a temperature of 16.3°C (61.3°F) is not enjoyable. The difficulty in managing breathing rises as the temperature decreases from 21°C (69.8°F) to 15°C (59°F).
Daylight
In Penryn, the average length of the day in September is 12h and 37min.On the first day of the month, sunrise is at 6:36 am and sunset at 8:04 pm. On the last day of September, in Penryn, sunrise is at 7:19 am and sunset at 7:00 pm BST.
Sunshine
In September, the average sunshine is 7.6h.UV index
The average daily maximum UV index in September 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 maximum daily UV index of 4 in September interprets into the following recommendations:
Make use of precautions - Shielding skin and eyes from injury is a requirement. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Penryn, United Kingdom
- Average high temperature in September: 16.5°C
The warmest month (with the highest average high temperature) is August (17.6°C).
The month with the lowest average high temperature is February (9.3°C).
- Average low temperature in September: 14.4°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 (6.9°C).
Average pressure in September
Penryn, United Kingdom
- Average pressure in September: 1017.5mbar
The month with the highest atmospheric pressure is September (1017.5mbar).
The month with the lowest atmospheric pressure is November (1010.4mbar).
Average wind speed in September
Penryn, United Kingdom
- Average wind speed in September: 23.3km/h
The windiest month (with the highest average wind speed) is December (31.6km/h).
The calmest month (with the lowest average wind speed) is July (19.9km/h).
Average humidity in September
Penryn, United Kingdom
- Average humidity in September: 83%
The months with the highest relative humidity are June and July (84%).
The month with the lowest relative humidity is February (79%).
Average rainfall in September
Penryn, United Kingdom
- Average rainfall in September: 19mm
The wettest month (with the highest rainfall) is November (55mm).
The driest month (with the least rainfall) is July (18mm).
Average rainfall days in September
Penryn, United Kingdom
- Average rainfall days in September: 9.9 days
The month with the highest number of rainy days is November (17.1 days).
The month with the least rainy days is September (9.9 days).
Average snowfall in September
Penryn, United Kingdom
- Average snowfall in September: 0mm
The months with the highest snowfall are February and December (1mm).
The months with the least snowfall are January, March, April, May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Penryn, United Kingdom
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are February and December (0.5 days).
The months with the least snowfall days are May, June, July, August, September, October and November (0 days).
Average sea temperature in September
Penryn, United Kingdom
- Average sea temperature in September: 16.3°C
The best month for swimming (with the highest average sea temperature) is August (17.1°C).
The coldest month (with the lowest average sea temperature) is March (9.7°C).
Average daylight in September /
Average sunshine in September
Penryn, United Kingdom
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 16h and 18min).
The month with the shortest days is December (Average daylight: 8h and 6min).
- Average sunshine in September: 7h and 36min
The months with the most sunshine are April and July (Average sunshine: 8h and 30min).
The months with the least sunshine are January and November (Average sunshine: 4h and 0min).
Average sunshine days in September
Penryn, United Kingdom
- Average sunshine days in September: 17.3 days
The month with the most sunshine days is May (17.5 days).
The month with the least sunshine days is November (10.2 days).
Average UV index in September
Penryn, United Kingdom
- Average UV index in September: 4
The month with the highest UV index is August (UV index 5).
The month with the lowest UV index is January (UV index 2).
Average cloud cover in September
Penryn, United Kingdom
- Average cloud cover in September: 47
The month with the most cloud cover is December (Cloud cover 61).
The month with the least cloud cover is April (Cloud cover 42).
Average visibility in September
Penryn, 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).
