St. Catharines in May
6.5out of 10
Possible, with caveats
Mild: highs around 16°C. Frequent rain: about 11 rainy days.
16°CAvg high
10°CAvg low
11Rainy days (84 mm)
14:29 hDaylight
05:59Sunrise · 20:28 Sunset
Why this score
- Mild: highs around 16°C
- Frequent rain: about 11 rainy days
What to wear and pack
- Layers you can add or remove
- Rain jacket or compact umbrella
How reliable is the forecast?
Rain in May varies a lot between years (±3.2 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 | 0°C | -5°C | 76 mm | 12 | – | – | 3.5 |
| February | 0°C | -6°C | 60 mm | 9 | – | – | 3.9 |
| March | 4°C | -2°C | 73 mm | 10 | – | – | 4.6 |
| April | 10°C | 4°C | 97 mm | 11 | – | – | 5.5 |
| May | 16°C | 10°C | 84 mm | 11 | – | – | 6.5 |
| June | 22°C | 16°C | 92 mm | 11 | – | – | 7.5 |
| July | 25°C | 20°C | 87 mm | 11 | – | – | 7.6 |
| August | 25°C | 19°C | 76 mm | 10 | – | – | 7.8 |
| September | 21°C | 16°C | 84 mm | 9 | – | – | 7.7 |
| October | 15°C | 10°C | 92 mm | 12 | – | – | 6.2 |
| November | 8°C | 4°C | 82 mm | 11 | – | – | 5.4 |
| December | 3°C | -1°C | 78 mm | 12 | – | – | 4.3 |
Frequently asked questions
How hot is St. Catharines in May?
Daytime highs average 16°C and nights about 10°C.
When is the best time to visit St. Catharines?
The best months are August, September, July, June.