St. John's weather in May
Temperature, sea and sunshine in May: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in May
Poor
Best time to visit: May – August
What is the weather like in St. John's in May?
In May, St. John's is cold: daytime highs average 9 °C, and nights cool down to about 3 °C. The sea averages 2.7 °C – swimming is only for the hardy. Expect around 6 hours of sunshine a day. Rain is frequent, with about 11 rainy days and 72 mm in total. All in all, May is not an ideal month for a holiday in St. John's.
May compared
How the weather changes from April to June. Tap a month to open it.
More details for May
- Daylight
- 15 h 5 min05:24 – 20:29
- UV index
- 7 · highclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 24 km/haverage daily peakAll months
- Cloud cover
- 75 %on averageAll months
- Hot days
- 0 days30 °C or more
- Snow days
- 1 day1 cm or more of fresh snowAll months
- Time zone
- UTC−2:30America/St_Johns
How the score comes together
- Temperatureweight 35 %0 %
- Seaweight 25 %0 %
- Sunshineweight 20 %45 %
- Few rainy daysweight 20 %49 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in May
- Sunscreen
- Sunglasses & sun hat
- Warm jacket
- Rain jacket or umbrella
St. John's in May: quick answers
Is St. John's hot in May?
No. In May, St. John's is cold: daytime highs average 9 °C and nights drop to about 3 °C.
Can you swim in St. John's in May?
Only if you don't mind cold water: in May the sea averages just 2.7 °C. Comfortable swimming temperatures are not reached at any time of year.
Does it rain much in St. John's in May?
Rain is frequent, with about 11 rainy days and 72 mm in total.
St. John's month by month
The whole year in St. John'sAll destinations: CanadaWhere to go in MaySea temperature in May
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences