Climate averages 1991–2020
Saint John’s weather
in December.
A warm, moderately wet month: the 9th warmest and the 6th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a warm month in Saint John’s: daytime highs average 26.7°C and nights cool to about 24.8°C. By daytime temperature it is the 9th warmest of the 12 months.
Expect about 57 mm of rain on roughly 13 days, which makes December a moderately wet month (the 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 08 min on an average December day.
The nearest other city in this atlas is Basseterre (96 km away). In December its highs average 26.4°C, about as warm as Saint John’s, with 54 mm of rain.
From December to January, average highs fall by 0.5°C to 26.2°C, and monthly rainfall falls from 57 mm to 32 mm.
The annual picture
December 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 | 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, selected | 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
December in nearby cities
- Basseterre in DecemberSaint Kitts and Nevis · 96 kmHigh 26.4°C · Low 24.7°C · 54 mm rain
- Basse-Terre in DecemberGuadeloupe · 126 kmHigh 27.8°C · Low 25.0°C · 40 mm rain
- Roseau in DecemberDominica · 208 kmHigh 26.5°C · Low 24.8°C · 48 mm rain
- Fort-de-France in DecemberMartinique · 292 kmHigh 27.3°C · Low 24.9°C · 54 mm rain
- Castries in DecemberSaint Lucia · 359 kmHigh 27.3°C · Low 24.0°C · 42 mm rain
- Kingstown in DecemberSaint Vincent and the Grenadines · 446 kmHigh 27.3°C · Low 25.6°C · 55 mm rain
- Carolina in DecemberPuerto Rico · 458 kmHigh 27.9°C · Low 22.4°C · 48 mm rain
- Caguas in DecemberPuerto Rico · 462 kmHigh 27.4°C · Low 22.4°C · 58 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.