Average annual temperature is 19.4 °C
Absolute maximum temperature: 42.0 °C
Absolute minimum temperature: 5.2 °C
Number of sunny days: 229 days
Number of rainy days: 136 days
Look at detailed online map of Ístro
* Weather data for Ístro Greece is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 18.2 | 20.1 | 22.2 | 22.3 | 29.2 | 33.7 | 42.0 | 36.3 | 35.5 | 30.7 | 28.3 | 21.9 |
| Average daytime temperature (°C) | 16.3 | 14.0 | 17.7 | 19.2 | 22.6 | 27.7 | 34.7 | 33.5 | 30.3 | 26.4 | 23.3 | 19.0 |
| Average temperature (°C) | 12.8 | 11.0 | 13.7 | 15.3 | 18.6 | 23.5 | 29.7 | 27.9 | 25.1 | 21.3 | 18.6 | 14.7 |
| Average night temperature (°C) | 9.4 | 8.1 | 10.1 | 11.3 | 14.9 | 19.2 | 24.9 | 22.9 | 20.9 | 17.2 | 14.2 | 11.0 |
| Absolute minimum temperature (°C) | 6.5 | 5.2 | 7.1 | 8.9 | 11.4 | 15.6 | 21.2 | 21.1 | 18.1 | 14.0 | 8.6 | 8.0 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 10.1 | 10.9 | 12.0 | 13.1 | 14.0 | 14.5 | 14.3 | 13.5 | 12.4 | 11.3 | 10.3 | 9.8 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 8.7 | 8.8 | 9.8 | 10.4 | 11.2 | 12.8 | 13.1 | 12.5 | 11.2 | 9.9 | 9.1 | 7.8 |
| Precipitation (mm) | 28 | 33 | 65 | 26 | 41 | 41 | 0 | 1 | 25 | 6 | 25 | 55 |
| Sunny days | 15 | 20 | 13 | 16 | 10 | 22 | 28 | 28 | 18 | 23 | 16 | 20 |
| Rainy days | 16 | 8 | 18 | 14 | 21 | 8 | 3 | 3 | 12 | 8 | 14 | 11 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Ístro is at