Average annual temperature is 19.0 °C
Absolute maximum temperature: 37.3 °C
Absolute minimum temperature: 4.3 °C
Number of sunny days: 200 days
Number of rainy days: 165 days
Look at detailed online map of Johnstown
* Weather data for Johnstown Australia is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 34.9 | 37.3 | 34.1 | 28.5 | 24.3 | 25.6 | 24.5 | 26.3 | 31.8 | 34.3 | 35.9 | 35.6 |
| Average daytime temperature (°C) | 29.5 | 29.8 | 29.0 | 24.7 | 21.0 | 21.1 | 20.0 | 22.7 | 25.1 | 28.3 | 27.9 | 30.9 |
| Average temperature (°C) | 23.1 | 23.1 | 22.8 | 18.6 | 14.1 | 14.2 | 13.8 | 15.6 | 17.6 | 20.3 | 21.3 | 23.9 |
| Average night temperature (°C) | 18.5 | 18.1 | 18.3 | 13.9 | 8.8 | 9.0 | 8.8 | 9.9 | 11.5 | 13.9 | 16.4 | 18.7 |
| Absolute minimum temperature (°C) | 14.9 | 15.5 | 13.1 | 9.1 | 5.3 | 5.0 | 4.3 | 6.0 | 6.9 | 10.0 | 13.1 | 15.8 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 | 13.0 |
| Daylight mean duration (h) | 13.6 | 13.0 | 12.2 | 11.5 | 10.8 | 10.5 | 10.7 | 11.2 | 11.9 | 12.7 | 13.4 | 13.8 |
| Daylight minimum duration (h) | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 | 10.0 | 10.0 | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 |
| Sunshine mean duration (h) | 9.5 | 10.3 | 9.1 | 9.2 | 9.3 | 8.8 | 8.4 | 9.7 | 10.3 | 11.5 | 9.4 | 11.1 |
| Precipitation (mm) | 57 | 56 | 136 | 42 | 37 | 4 | 22 | 7 | 9 | 3 | 129 | 145 |
| Sunny days | 9 | 12 | 10 | 19 | 24 | 21 | 23 | 23 | 20 | 21 | 9 | 9 |
| Rainy days | 22 | 16 | 21 | 11 | 7 | 9 | 8 | 8 | 10 | 10 | 21 | 22 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Johnstown is at