Average annual temperature is 11.2 °C
Absolute maximum temperature: 25.8 °C
Absolute minimum temperature: -2.7 °C
Number of sunny days: 98 days
Number of rainy days: 267 days
Look at detailed online map of Johnstown
* Weather data for Johnstown 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) | 13.1 | 14.0 | 14.7 | 17.2 | 19.2 | 25.4 | 21.9 | 22.7 | 25.8 | 21.5 | 13.9 | 13.5 |
| Average daytime temperature (°C) | 8.7 | 10.1 | 10.0 | 12.2 | 16.2 | 19.5 | 18.4 | 18.7 | 18.6 | 14.6 | 10.4 | 9.8 |
| Average temperature (°C) | 6.4 | 7.7 | 7.3 | 9.0 | 12.7 | 16.3 | 15.2 | 15.7 | 15.5 | 12.0 | 8.2 | 7.9 |
| Average night temperature (°C) | 4.3 | 5.3 | 5.0 | 5.9 | 9.4 | 13.0 | 12.1 | 13.0 | 12.1 | 9.3 | 5.7 | 5.7 |
| Absolute minimum temperature (°C) | -2.7 | 0.1 | -0.6 | 2.3 | 5.9 | 9.4 | 8.7 | 9.7 | 5.0 | 2.4 | 0.2 | -1.7 |
| 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 | 9.9 | 11.9 | 14.0 | 15.8 | 16.8 | 16.3 | 14.7 | 12.7 | 10.6 | 8.7 | 7.7 |
| Daylight minimum duration (h) | 7.0 | 9.0 | 10.0 | 12.0 | 14.0 | 16.0 | 15.0 | 13.0 | 11.0 | 9.0 | 8.0 | 7.0 |
| Sunshine mean duration (h) | 3.8 | 4.1 | 4.4 | 8.4 | 11.4 | 11.3 | 9.4 | 8.2 | 7.6 | 5.0 | 4.6 | 2.6 |
| Precipitation (mm) | 68 | 14 | 156 | 112 | 50 | 72 | 140 | 120 | 177 | 203 | 69 | 126 |
| Sunny days | 12 | 12 | 2 | 5 | 18 | 12 | 1 | 3 | 8 | 7 | 13 | 5 |
| Rainy days | 19 | 16 | 29 | 25 | 13 | 18 | 30 | 28 | 22 | 24 | 17 | 26 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Johnstown during the most sunny months:
Months with the longest average daylight duration in Johnstown:
The largest precipitation sum in Johnstown is at