Average annual temperature is 19.9 °C
Absolute maximum temperature: 38.6 °C
Absolute minimum temperature: 3.5 °C
Number of sunny days: 191 days
Number of rainy days: 174 days
Look at detailed online map of Grantham
* Weather data for Grantham 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) | 37.6 | 38.6 | 36.9 | 30.3 | 25.8 | 27.4 | 26.0 | 27.9 | 34.1 | 36.8 | 37.4 | 37.5 |
| Average daytime temperature (°C) | 31.4 | 31.4 | 31.0 | 25.9 | 22.1 | 21.3 | 21.0 | 23.7 | 25.9 | 29.2 | 28.9 | 32.6 |
| Average temperature (°C) | 24.3 | 24.3 | 24.3 | 19.5 | 15.3 | 14.7 | 14.1 | 16.0 | 18.0 | 21.0 | 21.8 | 25.2 |
| Average night temperature (°C) | 19.1 | 18.8 | 19.6 | 14.2 | 9.9 | 9.7 | 8.5 | 9.9 | 11.5 | 13.9 | 17.1 | 19.5 |
| Absolute minimum temperature (°C) | 16.9 | 15.7 | 15.1 | 10.9 | 6.4 | 5.8 | 3.5 | 6.2 | 6.1 | 11.1 | 14.0 | 16.1 |
| 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) | 13.7 | 13.0 | 12.2 | 11.4 | 10.8 | 10.4 | 10.6 | 11.2 | 11.9 | 12.7 | 13.5 | 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) | 10.1 | 10.8 | 8.7 | 9.7 | 9.1 | 8.7 | 8.3 | 9.9 | 10.5 | 11.6 | 9.6 | 10.9 |
| Precipitation (mm) | 82 | 42 | 116 | 25 | 83 | 11 | 16 | 24 | 31 | 7 | 132 | 129 |
| Sunny days | 9 | 9 | 9 | 19 | 26 | 21 | 23 | 17 | 19 | 25 | 7 | 7 |
| Rainy days | 22 | 19 | 22 | 11 | 5 | 9 | 8 | 14 | 11 | 6 | 23 | 24 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Grantham is at