Average data for 10 years
1 September
Sunday
+16°
+12°
2 September
Monday
+16°
+12°
3 September
Tuesday
+16°
+12°
4 September
Wednesday
+15°
+13°
5 September
Thursday
+15°
+12°
6 September
Friday
+15°
+12°
7 September
Saturday
+16°
+12°
8 September
Sunday
+15°
+12°
9 September
Monday
+16°
+12°
10 September
Tuesday
+15°
+12°
11 September
Wednesday
+14°
+12°
12 September
Thursday
+15°
+11°
13 September
Friday
+14°
+10°
14 September
Saturday
+14°
+11°
15 September
Sunday
+13°
+11°
16 September
Monday
+14°
+10°
17 September
Tuesday
+13°
+10°
18 September
Wednesday
+14°
+11°
19 September
Thursday
+14°
+11°
20 September
Friday
+15°
+11°
21 September
Saturday
+14°
+11°
22 September
Sunday
+14°
+11°
23 September
Monday
+14°
+11°
24 September
Tuesday
+14°
+11°
25 September
Wednesday
+14°
+11°
26 September
Thursday
+15°
+11°
27 September
Friday
+15°
+12°
28 September
Saturday
+15°
+13°
29 September
Sunday
+14°
+11°
30 September
Monday
+14°
+12°
Cities near you
Ireland
Dublin
Ireland
Cork
United Kingdom
Looe
United Kingdom
Penzance
United Kingdom
Swansea
Cities with similar weather in September
Finland
Helsinki
Latvia
Riga
Czech Republic
Karlovy Vary
Estonia
Tallinn
Sweden
Stockholm
In September, the weather in Portlaoise is typically warm. Average daily high temperature in September is about 15 degrees above zero. On average, Portlaoise has 17 rainy, 10 cloudy, and 3 sunny days in September. The rains are usually moderate. September as well as January, February, March, and April is considered the most uncomfortable time to visit Portlaoise.