Climate averages 1991–2020
Chetumal weather
by month.
See how the year changes. May has the highest average daily maximum; February has the lowest average monthly rainfall.
Pleasant-weather months by our simple rule: February
Long-term climate patterns, not a forecast for a particular trip.
Across the year Chetumal averages a daytime high of 29.6°C and a nighttime low of 23.3°C, with about 1,224 mm of rain on roughly 190 days. May is the warmest month (average high 31.6°C) and January the coolest (26.9°C). June is the wettest month with 193 mm; February is the driest with 24 mm.
Months with pleasant weather by a simple rule (average high between 18°C and 29°C, average low of at least 5°C and at most 8 rain days): February. This looks at temperature and rain only, not humidity, wind, sea temperature or crowds.
The annual picture
A year in Chetumal
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 | 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
Nearby cities
- BelmopanBelize · 149 kmHigh 29.4°C · Low 22.2°C · 1,208 mm rain a year
- CozumelMexico · 262 kmHigh 27.4°C · Low 25.4°C · 1,151 mm rain a year
- Playa del CarmenMexico · 267 kmHigh 28.1°C · Low 24.2°C · 1,049 mm rain a year
- CampecheMexico · 275 kmHigh 31.9°C · Low 23.5°C · 824 mm rain a year
- KanasínMexico · 299 kmHigh 32.6°C · Low 22.3°C · 700 mm rain a year
- Puerto CortezHonduras · 302 kmHigh 28.2°C · Low 23.3°C · 2,377 mm rain a year
- MéridaMexico · 305 kmHigh 32.3°C · Low 22.4°C · 700 mm rain a year
- Puerto BarriosGuatemala · 312 kmHigh 28.3°C · Low 22.9°C · 2,962 mm rain a year
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 limitsWhat do the high and low temperatures mean?
We average the daily maximum and daily minimum for each calendar month over 1991–2020. They are not record extremes, a forecast range or temperatures at a fixed time of day.
How is a rain day counted?
A local calendar day (standard time, UTC-5, no daylight saving) with at least 1 mm of total precipitation counts as one rain day. We count these for each year and month, then average across 30 years. The average does not predict which days will be wet.
Where do the numbers come from?
ERA5-Land (temperature) and ERA5 (precipitation) reanalysis from the Copernicus Climate Change Service, read from the Open-Meteo open-data archive. Temperature comes from the 0.1° model cell at 18.50°, -88.30° (2 km from the city centre). Rain comes from the 0.25° cell at 18.50°, -88.25°. These are model estimates, not weather-station readings; coast, hills and city streets can differ.
Does this page show sunshine, humidity or sea temperature?
No. The data used here contain air temperature and precipitation only. Daylight hours are calculated from the city's latitude (sunrise to sunset), not measured sunshine.