September weather forecastCastlegar, Ireland
September
Weather in September
The first month of the autumn, September, is also a moderate month in Castlegar, Ireland, with an average temperature ranging between max 15.5°C (59.9°F) and min 9.9°C (49.8°F).Temperature
As Castlegar welcomes September, the average high-temperature stabilizes at a moderate 15.5°C (59.9°F), showing little deviation from August's 16.9°C (62.4°F). In September, the recorded average low-temperature in Castlegar is a chilly 9.9°C (49.8°F).Humidity
January, July through December, with an average relative humidity of 87%, are the most humid months.Rainfall
In Castlegar, during September, the rain falls for 17.4 days and regularly aggregates up to 40mm (1.57") of precipitation. In Castlegar, Ireland, during the entire year, the rain falls for 235.1 days and collects up to 619mm (24.37") of precipitation.Snowfall
In Castlegar, Ireland, snow does not fall in April through November.Daylight
In September, the average length of the day is 12h and 41min.On the first day of the month, sunrise is at 6:46 am and sunset at 8:25 pm. On the last day of September, in Castlegar, sunrise is at 7:36 am and sunset at 7:14 pm IST.
Sunshine
In September, the average sunshine is 5.4h.UV index
The average daily maximum UV index in September in Castlegar is 3. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum daily UV index of 3 during September translates into the following directions:
Exercise prevention - Protecting skin and eyes from harm is required. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Castlegar, Ireland
- Average high temperature in September: 15.5°C
The warmest month (with the highest average high temperature) is July (17.3°C).
The month with the lowest average high temperature is January (7.9°C).
- Average low temperature in September: 9.9°C
The month with the highest average low temperature is August (11.4°C).
The coldest month (with the lowest average low temperature) is February (3.3°C).
Average pressure in September
Castlegar, Ireland
- Average pressure in September: 1014.8mbar
The month with the highest atmospheric pressure is May (1015.7mbar).
The month with the lowest atmospheric pressure is November (1007.7mbar).
Average wind speed in September
Castlegar, Ireland
- Average wind speed in September: 16.4km/h
The windiest months (with the highest average wind speed) are February and December (22.2km/h).
The calmest month (with the lowest average wind speed) is July (14.8km/h).
Average humidity in September
Castlegar, Ireland
- Average humidity in September: 87%
The months with the highest relative humidity are January, July, August, September, October, November and December (87%).
The months with the lowest relative humidity are March and April (83%).
Average rainfall in September
Castlegar, Ireland
- Average rainfall in September: 40mm
The wettest month (with the highest rainfall) is November (69mm).
The driest month (with the least rainfall) is April (36mm).
Average rainfall days in September
Castlegar, Ireland
- Average rainfall days in September: 17.4 days
The month with the highest number of rainy days is August (23.2 days).
The month with the least rainy days is April (17.3 days).
Average snowfall in September
Castlegar, Ireland
- Average snowfall in September: 0mm
The month with the highest snowfall is January (7mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Castlegar, Ireland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is March (0.9 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Castlegar, Ireland
- Average daylight in September: 12h and 42min
The month with the longest days is June (Average daylight: 16h and 54min).
The month with the shortest days is December (Average daylight: 7h and 36min).
- Average sunshine in September: 5h and 24min
The month with the most sunshine is June (Average sunshine: 7h and 24min).
The month with the least sunshine is December (Average sunshine: 3h and 42min).
Average sunshine days in September
Castlegar, Ireland
- Average sunshine days in September: 7.2 days
The month with the most sunshine days is March (9.4 days).
The month with the least sunshine days is August (4.1 days).
Average UV index in September
Castlegar, Ireland
- Average UV index in September: 3
The months with the highest UV index are May, June and July (UV index 4).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in September
Castlegar, Ireland
- Average cloud cover in September: 62
The month with the most cloud cover is July (Cloud cover 67).
The month with the least cloud cover is April (Cloud cover 56).
Average visibility in September
Castlegar, Ireland
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (9km).
The month with the lowest visibility is July (8km).
