Average annual temperature is 10.9 °C
Absolute maximum temperature: 27.4 °C
Absolute minimum temperature: -4.2 °C
Number of sunny days: 92 days
Number of rainy days: 272 days
Number of snow days: 1 day
Look at detailed online map of Portarlington
* Weather data for Portarlington Ireland is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 13.2 | 13.9 | 15.9 | 18.7 | 20.8 | 27.2 | 21.1 | 24.2 | 27.4 | 21.8 | 13.9 | 12.9 |
| Average daytime temperature (°C) | 8.2 | 10.1 | 10.1 | 13.0 | 17.1 | 21.1 | 18.2 | 19.1 | 18.9 | 14.6 | 9.9 | 9.1 |
| Average temperature (°C) | 5.8 | 7.5 | 7.1 | 9.2 | 13.0 | 16.9 | 15.0 | 15.5 | 15.0 | 11.2 | 7.3 | 7.1 |
| Average night temperature (°C) | 3.3 | 4.7 | 4.4 | 5.5 | 8.6 | 12.5 | 11.8 | 12.4 | 11.1 | 8.0 | 4.8 | 4.8 |
| Absolute minimum temperature (°C) | -4.2 | -3.0 | -1.2 | -0.5 | 4.8 | 8.3 | 8.6 | 9.4 | 3.9 | 0.5 | -1.9 | -3.8 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 8.0 | 10.0 | 12.0 | 14.0 | 16.0 | 16.0 | 16.0 | 15.0 | 13.0 | 11.0 | 9.0 | 7.0 |
| Daylight mean duration (h) | 8.2 | 9.8 | 11.9 | 14.0 | 15.9 | 16.9 | 16.4 | 14.7 | 12.7 | 10.6 | 8.7 | 7.6 |
| Daylight minimum duration (h) | 7.0 | 8.0 | 10.0 | 13.0 | 15.0 | 16.0 | 15.0 | 13.0 | 11.0 | 9.0 | 7.0 | 7.0 |
| Sunshine mean duration (h) | 3.6 | 3.7 | 4.4 | 7.5 | 10.0 | 11.5 | 8.5 | 8.1 | 6.9 | 4.8 | 4.5 | 2.2 |
| Precipitation (mm) | 83 | 19 | 135 | 83 | 32 | 56 | 142 | 92 | 145 | 148 | 59 | 98 |
| Sunny days | 8 | 12 | 3 | 6 | 17 | 11 | 2 | 1 | 8 | 8 | 10 | 6 |
| Rainy days | 23 | 16 | 27 | 24 | 14 | 19 | 29 | 30 | 22 | 23 | 20 | 25 |
| Snow days | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Portarlington during the most sunny months:
Months with the longest average daylight duration in Portarlington:
The largest precipitation sum in Portarlington is at