September weather forecastColbost, United Kingdom
September
Weather in September
The first month of the autumn, September, is still a mild month in Colbost, United Kingdom, with an average temperature fluctuating between 13.8°C (56.8°F) and 12.2°C (54°F).Temperature
Upon the beginning of September, Colbost's high-temperatures register at a still mild 13.8°C (56.8°F), closely mirroring the preceding month. September nights in Colbost reveal a minor deviation from daytime highs, with a mean low-temperature of 12.2°C (54°F).Humidity
The average relative humidity in September is 82%.Rainfall
In Colbost, during September, the rain falls for 22.8 days and regularly aggregates up to 91mm (3.58") of precipitation. Throughout the year, in Colbost, there are 267.8 rainfall days, and 1094mm (43.07") of precipitation is accumulated.Snowfall
In Colbost, snow does not fall in May through November.Daylight
The average length of the day in September is 12h and 47min.On the first day of the month, sunrise is at 6:29 am and sunset at 8:23 pm. On the last day of September, in Colbost, sunrise is at 7:29 am and sunset at 7:03 pm BST.
Sunshine
In September, the average sunshine in Colbost is 5.4h.UV index
The months with the highest UV index in Colbost are May through July and September, with an average maximum UV index of 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: A maximum high UV index of 4 in September translates into the following recommendations:
Undertake protective steps - Preventing sun damage is advised. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Colbost, United Kingdom
- Average high temperature in September: 13.8°C
The warmest month (with the highest average high temperature) is August (14.4°C).
The month with the lowest average high temperature is February (7.3°C).
- Average low temperature in September: 12.2°C
The month with the highest average low temperature is August (12.7°C).
The coldest month (with the lowest average low temperature) is February (5.8°C).
Average pressure in September
Colbost, United Kingdom
- Average pressure in September: 1011.2mbar
The month with the highest atmospheric pressure is May (1014.3mbar).
The months with the lowest atmospheric pressure are November and December (1004.9mbar).
Average wind speed in September
Colbost, United Kingdom
- Average wind speed in September: 30.4km/h
The windiest month (with the highest average wind speed) is January (39.5km/h).
The calmest month (with the lowest average wind speed) is June (21.8km/h).
Average humidity in September
Colbost, United Kingdom
- Average humidity in September: 82%
The month with the highest relative humidity is July (85%).
The months with the lowest relative humidity are November and December (75%).
Average rainfall in September
Colbost, United Kingdom
- Average rainfall in September: 91mm
The wettest month (with the highest rainfall) is December (128mm).
The driest month (with the least rainfall) is April (48mm).
Average rainfall days in September
Colbost, United Kingdom
- Average rainfall days in September: 22.8 days
The month with the highest number of rainy days is January (25.7 days).
The month with the least rainy days is June (17.8 days).
Average snowfall in September
Colbost, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is March (4mm).
The months with the least snowfall are May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Colbost, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.7 days).
The months with the least snowfall days are June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Colbost, United Kingdom
- Average daylight in September: 12h and 48min
The month with the longest days is June (Average daylight: 17h and 54min).
The month with the shortest days is December (Average daylight: 6h and 42min).
- Average sunshine in September: 5h and 24min
The month with the most sunshine is June (Average sunshine: 8h and 6min).
The months with the least sunshine are January and December (Average sunshine: 2h and 42min).
Average sunshine days in September
Colbost, United Kingdom
- Average sunshine days in September: 5.5 days
The month with the most sunshine days is June (10.4 days).
The month with the least sunshine days is January (3.3 days).
Average UV index in September
Colbost, United Kingdom
- Average UV index in September: 4
The months with the highest UV index are May, June, July 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
Colbost, United Kingdom
- Average cloud cover in September: 64
The month with the most cloud cover is January (Cloud cover 71).
The months with the least cloud cover are April and May (Cloud cover 56).
Average visibility in September
Colbost, United Kingdom
- Average visibility in September: 9km
The month with the highest visibility is April (10km).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (9km).
