Castlebar in september: average Weather, Temperature and Climate
Weather in Castlebar in september 2025
The weather in Castlebar in september comes from statistical datas on the past years. You can view the weather statistics the entire month, but also by clicking on the tabs for the beginning, the middle and the end of the month.
Average weather throughout september
tolerable weather
Weather at 6am
52°F
Cloudy
42% of time
27%
18%
9%
Weather at 12pm
61°F
Cloudy
56% of time
27%
12%
4%
Weather at 6pm
58°F
Cloudy
40% of time
26%
19%
10%
Weather at 3am
52°F
22%
21%
19%
17%
Evolution of daily average temperature and precipitation in Castlebar in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Castlebar in september.
The climate of Castlebar in september is tolerable
The climate in september in Castlebar is wet (with 2in of rainfall over 2 days). It should be noted an improvement from the previous month since in august it receives an average of 2.8in of rainfall over 3 days.
The climate is fairly cold here this month, but it is bearable by dressing cosy. The thermometer averaged maximum of 61°F. The seasonal minimum is 52°F. Thus, the mean temperature average in september in Castlebar is 58°F. Note that seasonal normals in contrast with those observed in Castlebar in september with a maximum record of 77°F in 2021 and a minimum record of 40°F in 2010. You can plan to have about 6 days with temperatures over 65°F, or 20% of time.
In september in Castlebar, the days on average last 12:42. Sunrise is at 06:11 and sets at 18:53.
With a correct weather, september is okay (but not good) to go in this locality.
September: another location in Ireland?
If you want to go to Ireland in september, there are destinations with better weather than Castlebar:
In september, Dublin, Cork, Ardmore, Dalkey Island, Rosslare and Tramore have good weather.
Seasonal average climate and temperature of Castlebar in september
Check below seasonal norms These datas are generated from the weather statements of the last years of the month of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 58°F | ||||
| Highest temperature | 61°F | ||||
| Lowest temperature | 52°F | ||||
| Highest record temperature | 77°F (2021) | ||||
| Lowest record temperature | 40°F (2010) | ||||
| Number of days at +65°F | 6 day(s) (20%) | ||||
| Wind | |||||
| Wind speed | 21km/h | ||||
| Wind temperature | 50°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 2in | ||||
| Number of days with rainfall | 2 day(s) (8%) | ||||
| Record daily rainfall | 1.1in (2015) | ||||
| Other climate data | |||||
| Humidity | 94% | ||||
| Visibility | 8.37km | ||||
| Cloud cover | 64% | ||||
| UV index | 4 | ||||
| Daily sunshine hours | 10 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 06:11 | ||||
| Time of sunset | 18:53 | ||||
| Length of day | 12:42 | ||||
| Our opinion about the weather in september | |||||
| Our opinion at whereandwhen.net | tolerable | ||||
How was the weather last september?
Here is the day by day recorded weather in Castlebar in september 2024:
49°F to 67°F
54°F to 58°F
56°F to 59°F
52°F to 56°F
47°F to 63°F
56°F to 72°F
56°F to 70°F
58°F to 61°F
47°F to 59°F
52°F to 56°F
49°F to 54°F
43°F to 54°F
40°F to 56°F
56°F to 59°F
52°F to 63°F
49°F to 59°F
54°F to 68°F
49°F to 67°F
49°F to 68°F
50°F to 68°F
52°F to 67°F
52°F to 65°F
50°F to 59°F
50°F to 56°F
43°F to 54°F
45°F to 50°F
49°F to 50°F
45°F to 56°F
47°F to 56°F
50°F to 58°F
Map: other cities in Ireland in september
Cities near Castlebar:
| Westport in september | tolerable weather |
| Ballinrobe in september | tolerable weather |
| Ballina in september | tolerable weather |
| Ballaghaderreen in september | tolerable weather |
| Tuam in september | tolerable weather |
| Ballycastle in september | tolerable weather |
| Oughterard in september | tolerable weather |
| Achill Island in september | tolerable weather |
| Connemara National Park in september | tolerable weather |
| Belmullet in september | tolerable weather |
| Galway in september | tolerable weather |
| Sligo in september | tolerable weather |
Click over cities on the map for information about the weather in september.
Castlebar
perfect weather
good
tolerable
bad
very bad
Weather data for Castlebar in september:
Weather data for Castlebar for september are derived from an average of the weather forecast since 2009 in Castlebar. There is a margin of error and these forecasts are to be considered as general information only. The weather in Castlebar can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to Castlebar.