Average annual temperature is 10.5 °C
Absolute maximum temperature: 25.7 °C
Absolute minimum temperature: -4.2 °C
Number of sunny days: 84 days
Number of rainy days: 279 days
Number of snow days: 2 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) | 12.5 | 13.8 | 14.8 | 17.3 | 21.7 | 25.1 | 20.6 | 23.5 | 25.7 | 21.2 | 13.3 | 12.8 |
| Average daytime temperature (°C) | 7.9 | 9.6 | 9.6 | 12.3 | 16.7 | 20.7 | 17.5 | 18.3 | 18.2 | 14.1 | 9.6 | 8.9 |
| Average temperature (°C) | 5.5 | 7.0 | 6.7 | 8.7 | 12.5 | 16.4 | 14.5 | 15.1 | 14.6 | 11.0 | 7.2 | 6.9 |
| Average night temperature (°C) | 3.0 | 4.3 | 4.0 | 5.1 | 8.1 | 11.8 | 11.4 | 12.2 | 11.0 | 8.3 | 4.9 | 4.7 |
| Absolute minimum temperature (°C) | -4.1 | -2.7 | -1.6 | -0.1 | 4.3 | 6.4 | 8.3 | 9.2 | 4.5 | 0.5 | -1.3 | -4.2 |
| 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) | 3.6 | 3.8 | 4.3 | 7.1 | 9.7 | 11.1 | 9.2 | 8.0 | 7.0 | 4.5 | 4.3 | 2.7 |
| Precipitation (mm) | 90 | 17 | 119 | 61 | 55 | 74 | 158 | 109 | 143 | 166 | 58 | 106 |
| Sunny days | 9 | 14 | 1 | 5 | 15 | 10 | 1 | 1 | 6 | 6 | 9 | 7 |
| Rainy days | 21 | 14 | 29 | 25 | 16 | 20 | 30 | 30 | 24 | 25 | 21 | 24 |
| Snow days | 1 | 0 | 1 | 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