Climate averages 1991–2020
Chetumal weather
in December.
A warm, moderately wet month: the 11th warmest and the 5th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a warm month in Chetumal: daytime highs average 27.1°C and nights cool to about 21.2°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 55 mm of rain on roughly 13 days, which makes December a moderately wet month (the 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 02 min on an average December day.
The nearest other city in this atlas is Belmopan (149 km away). In December its highs average 26.5°C, 0.6°C cooler than Chetumal, with 76 mm of rain.
Among the 153 cities listed in Mexico, Chetumal ranks joint 19th of 153 for the warmest December highs and 142nd of 153 for the driest December (rainfall, lowest first). The mean December high of those 153 cities is 22.7°C; Chetumal is 4.4°C warmer than that mean.
From December to January, average highs fall by 0.2°C to 26.9°C, and monthly rainfall falls from 55 mm to 52 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
Chetumal climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 26.9°C20.8°C | 20.8°C | 52 | 12.3 | 11.111 h |
| February | 28.2°C21.6°C | 21.6°C | 24 | 7.2 | 11.512 h |
| March | 29.7°C22.4°C | 22.4°C | 26 | 6.8 | 12.012 h |
| April | 31.3°C24.0°C | 24.0°C | 32 | 7.4 | 12.613 h |
| May | 31.6°C24.8°C | 24.8°C | 93 | 15.3 | 13.013 h |
| June | 30.4°C25.0°C | 25.0°C | 193 | 21.5 | 13.213 h |
| July | 30.8°C24.9°C | 24.9°C | 120 | 20.9 | 13.113 h |
| August | 31.1°C24.9°C | 24.9°C | 158 | 23.2 | 12.813 h |
| September | 30.6°C24.6°C | 24.6°C | 186 | 25.2 | 12.312 h |
| October | 29.2°C23.5°C | 23.5°C | 190 | 21.8 | 11.712 h |
| November | 27.8°C22.0°C | 22.0°C | 96 | 14.8 | 11.311 h |
| December, selected | 27.1°C21.2°C | 21.2°C | 55 | 13.3 | 11.011 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
- Belmopan in DecemberBelize · 149 kmHigh 26.5°C · Low 20.0°C · 76 mm rain
- Cozumel in DecemberMexico · 262 kmHigh 25.9°C · Low 24.1°C · 66 mm rain
- Playa del Carmen in DecemberMexico · 267 kmHigh 26.2°C · Low 22.5°C · 54 mm rain
- Campeche in DecemberMexico · 275 kmHigh 28.8°C · Low 21.0°C · 22 mm rain
- Kanasín in DecemberMexico · 299 kmHigh 29.2°C · Low 19.6°C · 22 mm rain
- Puerto Cortez in DecemberHonduras · 302 kmHigh 25.9°C · Low 21.6°C · 212 mm rain
- Mérida in DecemberMexico · 305 kmHigh 28.8°C · Low 19.8°C · 22 mm rain
- Puerto Barrios in DecemberGuatemala · 312 kmHigh 25.8°C · Low 21.2°C · 243 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 Chetumal) is explained once on the Chetumal year overview and on the Sources, method and limits page.