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
Castlebay, United Kingdom, signifies an average high-temperature of a still mild 14°C (57.2°F) in September, closely mirroring the 14.5°C (58.1°F) of August. Castlebay observes a slightly reduced average nighttime temperature of 12.6°C (54.7°F) during September.Humidity
In Castlebay, the average relative humidity in September is 82%.Rainfall
In Castlebay, in September, it is raining for 20 days, with typically 58mm (2.28") of accumulated precipitation. In Castlebay, during the entire year, the rain falls for 242.8 days and collects up to 799mm (31.46") of precipitation.Snowfall
In Castlebay, snow does not fall in March through December.Daylight
In Castlebay, the average length of the day in September is 12h and 46min.On the first day of September, sunrise is at 6:33 am and sunset at 8:26 pm. On the last day of the month, sunrise is at 7:32 am and sunset at 7:06 pm BST.
Sunshine
In September, the average sunshine is 5.7h.UV index
May through July and September, with an average maximum UV index of 4, are months with the highest UV index in Castlebay. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: The daily high UV index of 4 in September translates into this advice:
Exercise prevention - Warding off sunburn is urged. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Enhance your sun protection with tightly woven, yet airy clothing.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Castlebay in September?
What is the average humidity in September in Castlebay?
How many days does it rain in September in Castlebay?
When it does not snow in Castlebay?
How many hours of daylight does Castlebay have in September?
When is the sunrise / sunset in September in Castlebay?
How long on average sun shines in September in Castlebay?
When is the highest UV index in Castlebay?
How high is the UV index in September in Castlebay?
Average temperature in September
Castlebay, United Kingdom
- Average high temperature in September: 14°C
The warmest month (with the highest average high temperature) is August (14.5°C).
The months with the lowest average high temperature are February and March (8.2°C).
- Average low temperature in September: 12.6°C
The month with the highest average low temperature is August (13°C).
The coldest month (with the lowest average low temperature) is February (6.3°C).
Average pressure in September
Castlebay, United Kingdom
- Average pressure in September: 1011.3mbar
The month with the highest atmospheric pressure is May (1014.3mbar).
The month with the lowest atmospheric pressure is November (1004.9mbar).
Average wind speed in September
Castlebay, United Kingdom
- Average wind speed in September: 33.2km/h
The windiest month (with the highest average wind speed) is January (42.4km/h).
The calmest month (with the lowest average wind speed) is June (23.9km/h).
Average humidity in September
Castlebay, 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
Castlebay, United Kingdom
- Average rainfall in September: 58mm
The wettest month (with the highest rainfall) is December (87mm).
The driest month (with the least rainfall) is April (31mm).
Average rainfall days in September
Castlebay, United Kingdom
- Average rainfall days in September: 20 days
The month with the highest number of rainy days is January (23.7 days).
The month with the least rainy days is April (15.8 days).
Average snowfall in September
Castlebay, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is February (5mm).
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0mm).
Average snowfall days in September
Castlebay, United Kingdom
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (0.2 days).
The months with the least snowfall days are May, June, July, August, September, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
Castlebay, United Kingdom
- Average daylight in September: 12h and 5min
The month with the longest days is June (Average daylight: 17h and 48min).
The month with the shortest days is December (Average daylight: 6h and 54min).
- Average sunshine in September: 5h and 4min
The month with the most sunshine is June (Average sunshine: 8h and 36min).
The month with the least sunshine is January (Average sunshine: 2h and 36min).
Average sunshine days in September
Castlebay, United Kingdom
- Average sunshine days in September: 7.4 days
The month with the most sunshine days is April (11.7 days).
The month with the least sunshine days is January (4.7 days).
Average UV index in September
Castlebay, 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 and December (UV index 2).
Average cloud cover in September
Castlebay, United Kingdom
- Average cloud cover in September: 62
The month with the most cloud cover is January (Cloud cover 71).
The month with the least cloud cover is April (Cloud cover 54).
Average visibility in September
Castlebay, United Kingdom
- Average visibility in September: 10km
The months with the highest visibility are February, March, April, May, June, August, September, October, November and December (10km).
The months with the lowest visibility are January and July (9km).
Castlebay, United Kingdom
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