Climate averages 1991–2020
Saint John’s weather
in May.
A warm, moderately wet month: the 6th warmest and the 7th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a warm month in Saint John’s: daytime highs average 27.9°C and nights cool to about 25.4°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 62 mm of rain on roughly 12 days, which makes May a moderately wet month (the 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 55 min on an average May day.
The nearest other city in this atlas is Basseterre (96 km away). In May its highs average 27.5°C, about as warm as Saint John’s, with 61 mm of rain.
From May to June, average highs rise by 0.6°C to 28.5°C, and monthly rainfall falls from 62 mm to 51 mm.
The annual picture
May in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Saint John’s climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 26.2°C24.2°C | 24.2°C | 32 | 10.0 | 11.211 h |
| February | 26.2°C24.0°C | 24.0°C | 21 | 7.1 | 11.612 h |
| March | 26.5°C24.1°C | 24.1°C | 21 | 6.6 | 12.012 h |
| April | 27.2°C24.6°C | 24.6°C | 33 | 8.8 | 12.513 h |
| May, selected | 27.9°C25.4°C | 25.4°C | 62 | 12.4 | 12.913 h |
| June | 28.5°C26.0°C | 26.0°C | 51 | 12.1 | 13.113 h |
| July | 28.6°C26.1°C | 26.1°C | 78 | 15.9 | 13.013 h |
| August | 28.8°C26.3°C | 26.3°C | 98 | 17.8 | 12.713 h |
| September | 28.7°C26.2°C | 26.2°C | 127 | 18.0 | 12.212 h |
| October | 28.2°C26.0°C | 26.0°C | 132 | 18.8 | 11.812 h |
| November | 27.5°C25.4°C | 25.4°C | 103 | 15.8 | 11.311 h |
| December | 26.7°C24.8°C | 24.8°C | 57 | 13.3 | 11.111 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
May in nearby cities
- Basseterre in MaySaint Kitts and Nevis · 96 kmHigh 27.5°C · Low 25.4°C · 61 mm rain
- Basse-Terre in MayGuadeloupe · 126 kmHigh 29.5°C · Low 25.8°C · 50 mm rain
- Roseau in MayDominica · 208 kmHigh 27.7°C · Low 25.5°C · 44 mm rain
- Fort-de-France in MayMartinique · 292 kmHigh 28.7°C · Low 25.6°C · 58 mm rain
- Castries in MaySaint Lucia · 359 kmHigh 29.0°C · Low 24.8°C · 47 mm rain
- Kingstown in MaySaint Vincent and the Grenadines · 446 kmHigh 28.4°C · Low 26.2°C · 49 mm rain
- Carolina in MayPuerto Rico · 458 kmHigh 30.0°C · Low 23.6°C · 112 mm rain
- Caguas in MayPuerto Rico · 462 kmHigh 29.3°C · Low 23.5°C · 141 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Saint John’s) is explained once on the Saint John’s year overview and on the Sources, method and limits page.