September weather forecastCastlewarren, Ireland
September
Weather in September
September, the first month of the autumn in Castlewarren, is still a refreshing month, with an average temperature varying between 8.4°C (47.1°F) and 15.7°C (60.3°F).Temperature
The start of September sees the average high-temperature at a mild 15.7°C (60.3°F), showing little difference from August's 17.4°C (63.3°F). Throughout the month of September, Castlewarren sees a steady low-temperature average of 8.4°C (47.1°F).Humidity
In Castlewarren, the average relative humidity in September is 90%.Rainfall
March, May and September are months with the least rain in Castlewarren when the rain falls for 17 days and typically aggregates up to 37mm (1.46") of rain.Snowfall
April through October are months without snowfall.Daylight
The average length of the day in September in Castlewarren is 12h and 40min.On the first day of September, sunrise is at 6:40 am and sunset at 8:16 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 7:07 pm IST.
Sunshine
In Castlewarren, the average sunshine in September is 5.8h.UV index
The average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the average person.Note: In September, the maximum UV index of 3 suggests these recommendations:
Undertake protective steps - Recommendations to avoid sunburn are issued. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Boost your sun resistance with garments that are densely woven yet spacious.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Castlewarren, Ireland
- Average high temperature in September: 15.7°C
The warmest month (with the highest average high temperature) is July (17.9°C).
The month with the lowest average high temperature is January (7.1°C).
- Average low temperature in September: 8.4°C
The month with the highest average low temperature is July (10.6°C).
The coldest months (with the lowest average low temperature) are January, February and March (1.8°C).
Average pressure in September
Castlewarren, Ireland
- Average pressure in September: 1015.7mbar
The month with the highest atmospheric pressure is May (1016.2mbar).
The month with the lowest atmospheric pressure is November (1008.6mbar).
Average wind speed in September
Castlewarren, Ireland
- Average wind speed in September: 13.6km/h
The windiest month (with the highest average wind speed) is February (18.6km/h).
The calmest month (with the lowest average wind speed) is July (12.6km/h).
Average humidity in September
Castlewarren, Ireland
- Average humidity in September: 90%
The months with the highest relative humidity are November and December (92%).
The month with the lowest relative humidity is April (86%).
Average rainfall in September
Castlewarren, Ireland
- Average rainfall in September: 37mm
The wettest month (with the highest rainfall) is November (70mm).
The driest months (with the least rainfall) are March, May and September (37mm).
Average rainfall days in September
Castlewarren, Ireland
- Average rainfall days in September: 17 days
The month with the highest number of rainy days is July (22.5 days).
The month with the least rainy days is November (15.6 days).
Average snowfall in September
Castlewarren, Ireland
- Average snowfall in September: 0mm
The month with the highest snowfall is February (14mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Castlewarren, Ireland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2 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
Castlewarren, Ireland
- Average daylight in September: 12h and 42min
The month with the longest days is June (Average daylight: 16h and 48min).
The month with the shortest days is December (Average daylight: 7h and 42min).
- Average sunshine in September: 5h and 48min
The months with the most sunshine are April and May (Average sunshine: 6h and 6min).
The month with the least sunshine is February (Average sunshine: 3h and 48min).
Average sunshine days in September
Castlewarren, Ireland
- Average sunshine days in September: 8.8 days
The month with the most sunshine days is November (11.1 days).
The month with the least sunshine days is August (4.1 days).
Average UV index in September
Castlewarren, Ireland
- 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, November and December (UV index 2).
Average cloud cover in September
Castlewarren, Ireland
- Average cloud cover in September: 63
The month with the most cloud cover is July (Cloud cover 69).
The months with the least cloud cover are March and April (Cloud cover 59).
Average visibility in September
Castlewarren, Ireland
- Average visibility in September: 7km
The months with the highest visibility are January, February, March, April, May, June, October, November and December (8km).
The months with the lowest visibility are July, August and September (7km).
