Weather in September
Temperature
September's presence marks an average high-temperature of a still refreshing 17.1°C (62.8°F), subtly varied from August's 19.3°C (66.7°F). Throughout September, a steady low-temperature average of 9.3°C (48.7°F) is noted.Humidity
The average relative humidity in September in Birr, Ireland, is 70.3%.Rainfall
In Birr, in September, during 17 rainfall days, 66mm (2.6") of precipitation is typically accumulated. Throughout the year, there are 206 rainfall days, and 846mm (33.31") of precipitation is accumulated.Snowfall
In Birr, Ireland, snow does not fall in June through October.Daylight
The average length of the day in September is 12h and 40min.On the first day of the month, sunrise is at 6:42 am and sunset at 8:20 pm. On the last day of September, in Birr, sunrise is at 7:32 am and sunset at 7:10 pm IST.
Sunshine
The average sunshine in September in Birr, Ireland, is 3.5h.Frequently asked questions
What are September temperatures in Birr?
What is the average humidity in September in Birr?
How much does it rain in Birr in September?
When it does not snow in Birr?
What is the average length of the day in September in Birr?
What time are sunrise and sunset in September in Birr?
How long on average sun shines in September in Birr?
Average temperature in September
Birr, Ireland
- Average high temperature in September: 17.1°C
The warmest month (with the highest average high temperature) is July (19.6°C).
The month with the lowest average high temperature is January (8.1°C).
- Average low temperature in September: 9.3°C
The month with the highest average low temperature is July (11.6°C).
The coldest months (with the lowest average low temperature) are January and February (2°C).
Average humidity in September
Birr, Ireland
- Average humidity in September: 70.3%
The month with the highest relative humidity is December (84.5%).
The month with the lowest relative humidity is May (64.7%).
Average rainfall in September
Birr, Ireland
- Average rainfall in September: 66.4mm
The wettest month (with the highest rainfall) is October (94.2mm).
The driest month (with the least rainfall) is April (55mm).
Average rainfall days in September
Birr, Ireland
- Average rainfall days in September: 17 days
The months with the highest number of rainy days are January, March and October (19 days).
The months with the least rainy days are February and April (15 days).
Average snowfall days in September
Birr, Ireland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (3.5 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Birr, Ireland
- Average daylight in September: 12h and 4min
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 42min).
- Average sunshine in September: 3h and 3min
The month with the most sunshine is May (Average sunshine: 5h and 6min).
The month with the least sunshine is December (Average sunshine: 1h and 24min).
Birr, Ireland
Weather forecast for your location
2. Allow the app to use your location
