St. Marys Climate: Weather by Month and Best Time to Visit
Best months for St. Marys: April, November, March, May.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | 17°C | 9°C | 75 mm | 8 | – | – | 7.2 |
| February | 19°C | 10°C | 65 mm | 8 | – | – | 7.5 |
| March | 21°C | 13°C | 71 mm | 7 | – | – | 8.0 |
| April | 24°C | 16°C | 59 mm | 7 | – | – | 8.2 |
| May | 28°C | 20°C | 63 mm | 9 | – | – | 7.9 |
| June | 30°C | 23°C | 129 mm | 17 | – | – | 6.3 |
| July | 31°C | 25°C | 115 mm | 18 | – | – | 5.9 |
| August | 30°C | 25°C | 148 mm | 21 | – | – | 5.7 |
| September | 29°C | 23°C | 137 mm | 16 | – | – | 6.7 |
| October | 26°C | 19°C | 82 mm | 9 | – | – | 7.9 |
| November | 21°C | 14°C | 46 mm | 6 | – | – | 8.2 |
| December | 18°C | 11°C | 64 mm | 7 | – | – | 7.6 |