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 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
A minimal variation is noted in Colliston's average high-temperature at the onset of September, reaching a mild 14.5°C (58.1°F) from August's 16.1°C (61°F). Colliston's nighttime temperature in September consistently rests at a cool 10.5°C (50.9°F).Humidity
In Colliston, the average relative humidity in September is 84%.Rainfall
In Colliston, in September, it is raining for 7.3 days, with typically 7mm (0.28") of accumulated precipitation. Throughout the year, in Colliston, there are 105.7 rainfall days, and 138mm (5.43") of precipitation is accumulated.Snowfall
May through October are months without snowfall.Daylight
The average length of the day in September is 12h and 46min.On the first day of September in Colliston, sunrise is at 6:14 am and sunset at 8:05 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 6:47 pm BST.
Sunshine
The average sunshine in September in Colliston, United Kingdom, is 7.3h.UV index
The months with the highest UV index in Colliston are June through 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 rays for the average person.Note: The maximum UV index of 4 during September translates into these guidelines:
Guard yourself - Precautionary measures against sun damage are advocated. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
Frequently asked questions
What are September temperatures in Colliston?
What is the average humidity in September in Colliston?
How much does it rain in Colliston in September?
When it does not snow in Colliston?
How many hours of daylight does Colliston have in September?
What time are sunrise and sunset in September in Colliston?
How long on average sun shines in September in Colliston?
When is the highest UV index in Colliston?
What is the UV index intensity in September in Colliston?
Average temperature in September
Colliston, United Kingdom
- Average high temperature in September: 14.5°C
The warmest month (with the highest average high temperature) is August (16.1°C).
The month with the lowest average high temperature is January (5.8°C).
- Average low temperature in September: 10.5°C
The month with the highest average low temperature is August (11.9°C).
The coldest month (with the lowest average low temperature) is February (3.3°C).
Average pressure in September
Colliston, United Kingdom
- Average pressure in September: 1012.9mbar
The month with the highest atmospheric pressure is May (1015.3mbar).
The month with the lowest atmospheric pressure is November (1006.7mbar).
Average wind speed in September
Colliston, United Kingdom
- Average wind speed in September: 18.9km/h
The windiest month (with the highest average wind speed) is December (25.5km/h).
The calmest months (with the lowest average wind speed) are June and July (15km/h).
Average humidity in September
Colliston, United Kingdom
- Average humidity in September: 84%
The months with the highest relative humidity are June and July (85%).
The months with the lowest relative humidity are March and April (81%).
Average rainfall in September
Colliston, United Kingdom
- Average rainfall in September: 7mm
The wettest months (with the highest rainfall) are July and August (18mm).
The driest month (with the least rainfall) is April (6mm).
Average rainfall days in September
Colliston, United Kingdom
- Average rainfall days in September: 7.3 days
The month with the highest number of rainy days is August (11.6 days).
The month with the least rainy days is February (6.6 days).
Average snowfall in September
Colliston, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is February (9mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Colliston, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Colliston, United Kingdom
- Average daylight in September: 12h and 5min
The month with the longest days is June (Average daylight: 17h and 42min).
The month with the shortest days is December (Average daylight: 6h and 54min).
- Average sunshine in September: 7h and 2min
The month with the most sunshine is July (Average sunshine: 8h and 12min).
The month with the least sunshine is October (Average sunshine: 4h and 24min).
Average sunshine days in September
Colliston, United Kingdom
- Average sunshine days in September: 18.9 days
The month with the most sunshine days is April (21.3 days).
The month with the least sunshine days is August (15.7 days).
Average UV index in September
Colliston, United Kingdom
- Average UV index in September: 4
The months with the highest UV index are June, July, August 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
Colliston, United Kingdom
- Average cloud cover in September: 50
The month with the most cloud cover is June (Cloud cover 55).
The month with the least cloud cover is April (Cloud cover 48).
Average visibility in September
Colliston, United Kingdom
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, August, September, October, November and December (10km).
The months with the lowest visibility are June and July (9km).
Colliston, United Kingdom
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