Portlaoise in september: average Weather, Temperature and Climate
Weather in Portlaoise in september 2025
The weather in Portlaoise in september comes from statistical datas on the last years. You can view the weather statistics for all the 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
50°F
Fog
47% of time
27%
14%
7%
Weather at 12pm
61°F
Cloudy
47% of time
26%
12%
12%
Weather at 6pm
58°F
Cloudy
32% of time
30%
20%
13%
Weather at 3am
50°F
42%
17%
14%
13%
Evolution of daily average temperature and precipitation in Portlaoise in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Portlaoise in september.
The climate of Portlaoise in september is tolerable
In september in Portlaoise, the climate is wet (with 2.1in of rainfall over 3 days). The weather is better from the previous month since in august it receives an average of 2.6in of rainfall over 3 days.
The climate is fairly fresh in this location this month, but it is bearable when dressing cosy. Temperatures are up to 61°F. In the morning the temperature drops to 50°F. Thus, the mean temperature average on this month of september in Portlaoise is 56°F. These temperatures are far removed from those records observed in Portlaoise in september with a maximum record of 77°F in 2021 and a minimum record of 31°F in 2010. You can expect to have about 7 days with temperatures over 65°F, or 23% of time.
On this month of september, day length in Portlaoise is generally 12:41. The sun rises at 06:03 and sunset is at 18:44.
With a bad weather, the month of september is not the best time to go in Portlaoise.
September: another location in Ireland?
If you want to go to Ireland in september, there are destinations with better weather than Portlaoise:
In september, Dublin, Cork, Ardmore, Dalkey Island, Rosslare and Tramore have good weather.
Seasonal average climate and temperature of Portlaoise in september
Check below seasonal norms These datas are set from the weather statements of the last years of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 56°F | ||||
| Highest temperature | 61°F | ||||
| Lowest temperature | 50°F | ||||
| Highest record temperature | 77°F (2021) | ||||
| Lowest record temperature | 31°F (2010) | ||||
| Number of days at +65°F | 7 day(s) (23%) | ||||
| Wind | |||||
| Wind speed | 19km/h | ||||
| Wind temperature | 47°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 2.1in | ||||
| Number of days with rainfall | 3 day(s) (10%) | ||||
| Record daily rainfall | 0.8in (2017) | ||||
| Other climate data | |||||
| Humidity | 97% | ||||
| Visibility | 7.44km | ||||
| Cloud cover | 64% | ||||
| UV index | 4 | ||||
| Daily sunshine hours | 10 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 06:03 | ||||
| Time of sunset | 18:44 | ||||
| Length of day | 12:41 | ||||
| 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 Portlaoise in september 2024:
52°F to 67°F
52°F to 59°F
45°F to 63°F
52°F to 59°F
45°F to 61°F
58°F to 72°F
56°F to 68°F
56°F to 68°F
47°F to 61°F
52°F to 58°F
49°F to 56°F
41°F to 54°F
36°F to 56°F
47°F to 63°F
56°F to 65°F
49°F to 67°F
49°F to 68°F
47°F to 67°F
49°F to 70°F
50°F to 68°F
50°F to 67°F
54°F to 58°F
54°F to 59°F
49°F to 58°F
43°F to 56°F
47°F to 52°F
43°F to 52°F
38°F to 56°F
49°F to 54°F
50°F to 56°F
Map: other cities in Ireland in september
Cities near Portlaoise:
| Tullamore in september | tolerable weather |
| Carlow in september | tolerable weather |
| Droichead Nua in september | tolerable weather |
| Birr in september | tolerable weather |
| Kilkenny in september | tolerable weather |
| Naas in september | tolerable weather |
| Wicklow Mountains National Park in september | tolerable weather |
| Athlone in september | tolerable weather |
| Cashel in september | tolerable weather |
| Enniscorthy in september | good weather |
| Dublin in september | good weather |
| Navan in september | tolerable weather |
Click over cities on the map for information about the weather in september.
Portlaoise
perfect weather
good
tolerable
bad
very bad
Weather data for Portlaoise in september:
Weather data for Portlaoise for september are derived from an average of the weather forecast since 2009 in Portlaoise. There is a margin of error and these forecasts are to be considered as general information only. The weather in Portlaoise 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 Portlaoise.