Johnston Climate: Weather by Month and Best Time to Visit
Best months for Johnston: September, August, July.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | -1°C | -10°C | 29 mm | 6 | – | – | 4.2 |
| February | 2°C | -8°C | 37 mm | 7 | – | – | 4.3 |
| March | 10°C | -1°C | 66 mm | 9 | – | – | 5.6 |
| April | 17°C | 5°C | 110 mm | 11 | – | – | 6.6 |
| May | 23°C | 12°C | 140 mm | 14 | – | – | 7.0 |
| June | 28°C | 17°C | 127 mm | 12 | – | – | 7.3 |
| July | 29°C | 19°C | 96 mm | 10 | – | – | 7.6 |
| August | 28°C | 18°C | 99 mm | 9 | – | – | 7.8 |
| September | 25°C | 13°C | 89 mm | 8 | – | – | 7.9 |
| October | 18°C | 7°C | 72 mm | 8 | – | – | 7.3 |
| November | 9°C | 0°C | 53 mm | 7 | – | – | 5.9 |
| December | 2°C | -7°C | 41 mm | 6 | – | – | 4.5 |