September weather forecastScalloway, United Kingdom
September
Weather in September
The first month of the autumn, September, is also a fresh month in Scalloway, United Kingdom, with temperature in the range of an average low of 11.5°C (52.7°F) and an average high of 12.8°C (55°F).Temperature
In Scalloway, September's average high-temperature stands at a cool 12.8°C (55°F), closely related to the preceding month. September nights witness a mild cool down to an average low of 11.5°C (52.7°F).Humidity
In September, the average relative humidity is 83%.Rainfall
In Scalloway, United Kingdom, in September, it is raining for 20 days, with typically 56mm (2.2") of accumulated precipitation. Throughout the year, there are 250.8 rainfall days, and 719mm (28.31") of precipitation is accumulated.Snowfall
In Scalloway, snow does not fall in June through October.Daylight
In Scalloway, the average length of the day in September is 12h and 52min.On the first day of September, sunrise is at 6:01 am and sunset at 8:08 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 6:40 pm BST.
Sunshine
The average sunshine in September in Scalloway is 6h.UV index
The average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for average individuals.Note: In September, the average maximum UV index of 3 translates into the following recommendations:
Act with care - The suggestion to avoid sunburn is emphasized. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Experience reduced UV exposure by about half when donning a wide-brim hat. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Scalloway, United Kingdom
- Average high temperature in September: 12.8°C
The warmest month (with the highest average high temperature) is August (14°C).
The month with the lowest average high temperature is February (6.8°C).
- Average low temperature in September: 11.5°C
The month with the highest average low temperature is August (12.4°C).
The coldest month (with the lowest average low temperature) is February (4.9°C).
Average pressure in September
Scalloway, United Kingdom
- Average pressure in September: 1010.1mbar
The months with the highest atmospheric pressure are May and June (1014.3mbar).
The month with the lowest atmospheric pressure is December (1002.5mbar).
Average wind speed in September
Scalloway, United Kingdom
- Average wind speed in September: 29.5km/h
The windiest month (with the highest average wind speed) is January (38.7km/h).
The calmest month (with the lowest average wind speed) is July (22.5km/h).
Average humidity in September
Scalloway, United Kingdom
- Average humidity in September: 83%
The month with the highest relative humidity is July (86%).
The month with the lowest relative humidity is December (75%).
Average rainfall in September
Scalloway, United Kingdom
- Average rainfall in September: 56mm
The wettest month (with the highest rainfall) is December (90mm).
The driest month (with the least rainfall) is June (32mm).
Average rainfall days in September
Scalloway, United Kingdom
- Average rainfall days in September: 20 days
The month with the highest number of rainy days is December (25.8 days).
The month with the least rainy days is June (14.8 days).
Average snowfall in September
Scalloway, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is February (12mm).
The months with the least snowfall are June, July, August, September and October (0mm).
Average snowfall days in September
Scalloway, United Kingdom
- Average snowfall days in September: 0.1 days
The months with the highest number of snowfall days are February and March (2.2 days).
The months with the least snowfall days are June, July, August and October (0 days).
Average daylight in September /
Average sunshine in September
Scalloway, United Kingdom
- Average daylight in September: 12h and 54min
The month with the longest days is June (Average daylight: 18h and 48min).
The month with the shortest days is December (Average daylight: 6h and 0min).
- Average sunshine in September: 6h and 0min
The month with the most sunshine is June (Average sunshine: 9h and 18min).
The month with the least sunshine is December (Average sunshine: 2h and 6min).
Average sunshine days in September
Scalloway, United Kingdom
- Average sunshine days in September: 6.8 days
The month with the most sunshine days is June (12.1 days).
The month with the least sunshine days is December (2.1 days).
Average UV index in September
Scalloway, United Kingdom
- Average UV index in September: 3
The months with the highest UV index are June and August (UV index 4).
The months with the lowest UV index are January, February, March, April, November and December (UV index 2).
Average cloud cover in September
Scalloway, United Kingdom
- Average cloud cover in September: 61
The month with the most cloud cover is January (Cloud cover 71).
The month with the least cloud cover is May (Cloud cover 56).
Average visibility in September
Scalloway, United Kingdom
- Average visibility in September: 10km
The months with the highest visibility are February, April, May, June, July, August, September and October (10km).
The months with the lowest visibility are January, March, November and December (9km).
