Dundalk in september: average Weather, Temperature and Climate
Weather in Dundalk in september 2025
The weather in Dundalk in september comes from statistical datas on the last years. You can view the weather statistics for all the month, but also by using 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
34% of time
32%
18%
13%
Weather at 12pm
61°F
Cloudy
49% of time
28%
14%
6%
Weather at 6pm
58°F
Cloudy
31% of time
25%
22%
13%
Weather at 3am
52°F
29%
20%
18%
14%
Evolution of daily average temperature and precipitation in Dundalk in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Dundalk in september.
The climate of Dundalk in september is tolerable
In september in Dundalk, the climate is wet (with 1.9in of rainfall over 3 days). This is better than the previous month since in august it receives an average of 2.7in of precipitation over 3 days.
The climate is rather fresh there september, but it is bearable by dressing cosy. Temperatures are up to 61°F. The minimum is 50°F. Thus, the mean temperature average on this month of september in Dundalk is 56°F. Note that these seasonal averages are in contrast with those observed in Dundalk in september with a maximum record of 74°F in 2021 and a minimum record of 34°F in 2010. You can plan to have about 6 days with temperatures up to 65°F, or 20% of time.
Day length in Dundalk in september is 12:42. Sunrise is at 05:59 and sets at 18:41.
With proper weather, the month of september is okay (but not the best) to go in that area in Ireland.
September: another location in Ireland?
If you want to go to Ireland in september, there are destinations with better weather than Dundalk:
In september, Dublin, Cork, Ardmore, Dalkey Island, Rosslare and Tramore have good weather.
Seasonal average climate and temperature of Dundalk in september
Check below seasonal norms These statistics are set from the weather statements of the past years of the month of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 56°F | ||||
| Highest temperature | 61°F | ||||
| Lowest temperature | 50°F | ||||
| Highest record temperature | 74°F (2021) | ||||
| Lowest record temperature | 34°F (2010) | ||||
| Number of days at +65°F | 6 day(s) (20%) | ||||
| Sea temperature | |||||
| Average sea temperature | 59°F | ||||
| Lowest sea temperature | 58°F | ||||
| Highest sea temperature | 60°F | ||||
| Wind | |||||
| Wind speed | 20km/h | ||||
| Wind temperature | 49°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 1.9in | ||||
| Number of days with rainfall | 3 day(s) (10%) | ||||
| Record daily rainfall | 1.2in (2021) | ||||
| Other climate data | |||||
| Humidity | 96% | ||||
| Visibility | 8.08km | ||||
| Cloud cover | 60% | ||||
| UV index | 4 | ||||
| Daily sunshine hours | 10 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 05:59 | ||||
| Time of sunset | 18:41 | ||||
| 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 Dundalk in september 2024:
56°F to 59°F
56°F to 61°F
50°F to 59°F
49°F to 58°F
49°F to 63°F
56°F to 68°F
56°F to 67°F
58°F to 65°F
49°F to 59°F
52°F to 56°F
47°F to 54°F
45°F to 54°F
43°F to 54°F
54°F to 63°F
56°F to 63°F
50°F to 61°F
54°F to 63°F
52°F to 61°F
50°F to 63°F
50°F to 63°F
52°F to 63°F
54°F to 61°F
50°F to 63°F
52°F to 56°F
47°F to 54°F
50°F to 52°F
43°F to 52°F
43°F to 56°F
50°F to 54°F
49°F to 50°F
Map: other cities in Ireland in september
Cities near Dundalk:
| Drogheda in september | good weather |
| Laytown in september | good weather |
| Navan in september | tolerable weather |
| Monaghan in september | bad weather |
| Balbriggan in september | good weather |
| Skerries in september | good weather |
| Cavan in september | bad weather |
| Malahide in september | good weather |
| Dublin in september | good weather |
| Dún Laoghaire in september | good weather |
| Dalkey Island in september | good weather |
| Naas in september | tolerable weather |
Click over cities on the map for information about the weather in september.
Dundalk
perfect weather
good
tolerable
bad
very bad
Weather data for Dundalk in september:
Weather data for Dundalk for september are derived from an average of the weather forecast since 2009 in Dundalk. There is a margin of error and these forecasts are to be considered as general information only. The weather in Dundalk 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 Dundalk.