St. John's weather in May
May in St. John's: hot, dry, with clean air — an excellent time to visit.
#4 of 12 months in St. John's · #212 of 604 destinations to visit in May · comfort 85/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
St. John's climate normals — May
| Daytime high | 28°C / 83°F | 🥵 hot |
|---|---|---|
| Nighttime low | 26°C / 78°F | |
| Feels like (high) | 31°C / 88°F | |
| Rainfall | 27 mm / 1.1 in | ☀️ dry |
| Rainy days | 9 days | |
| Humidity | 76% | 💦 very humid |
| Dew point | 22°C / 72°F | |
| Sunshine | 11.6 h/day | |
| Daylight | 12.9 h | |
| Wind | 29 km/h / 18 mph | |
| Air quality (US AQI) | 41 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is St. John's?
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St. John's in May — FAQ
- Is May a good time to visit St. John's?
- May in St. John's: hot, dry, with clean air — an excellent time to visit. It ranks #4 of 12 months for St. John's on SeasonMap's comfort score (85/100).
- What is the weather like in St. John's in May?
- In May, St. John's averages a daily high of 28.2°C and a low of 25.8°C, with about 27.4 mm of rain over roughly 9.2 rainy days.
- What is the air quality in St. John's in May?
- St. John's has a mean US Air Quality Index of about 41 in May.