St. Marys in September
6.7out of 10
Possible, with caveats
Warm and comfortable: highs around 29°C. Very wet: about 16 rainy days.
29°CAvg high
23°CAvg low
16Rainy days (137 mm)
12:11 hDaylight
07:15Sunrise · 19:26 Sunset
Why this score
- Warm and comfortable: highs around 29°C
- Very wet: about 16 rainy days
- Rain varies a lot between years (±4.5 days)
What to wear and pack
- T-shirts and light layers
- Shorts or a light skirt
- Rain jacket or compact umbrella
- Sunscreen, sunglasses and a hat
How reliable is the forecast?
Rain in September varies a lot between years (±4.5 rainy days), so check the forecast closer to your trip. Averages cover 30 years (1991–2020). Individual days can differ a lot.
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 |
Frequently asked questions
How hot is St. Marys in September?
Daytime highs average 29°C and nights about 23°C.
When is the best time to visit St. Marys?
The best months are April, November, March, May.