Chetumal climate

Name: Chetumal
Address: MX

Chetumal is warmest in May, with average highs of 31 °C, and coldest in January, when nights average 21 °C. June is the wettest month (196 mm) and February the driest (26 mm). Figures are 1991–2020 climate normals.

Across a full year Chetumal averages 1,240 mm of rain and 354 days above 25 °C.

Mexico · population 169,028 · 1991–2020 normals

Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month

Warmest month May 31 °C
Coldest month January 21 °C
Driest month February 26 mm
Wettest month June 196 mm
Least cloud March 36 % cloud
Hottest on record March 38 °C
Coldest on record March 13 °C
Warmest sea September 30 °C

What to expectChetumal through the year

Chetumal has a clear annual cycle: average daily highs run from 27 °C in January to 31 °C in May, a swing of 4.2 °C in mean temperature across the year.

Counted across a normal year, 354 days a year reach 25 °C, 158 of them reach 30 °C. The warmest reading in the 1991–2020 record is 38 °C, in March.

Rain is strongly seasonal. June averages 196 mm against 26 mm in February — 7.5 times as much. Planning around the dry months matters more here than planning around temperature.

The sea off Chetumal is warmest in September at 30 °C and coldest in January at 26 °C. Sea temperature lags the air by a month or two, which is why late summer swims warmer than early summer at the same air temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	26.8 °C	53 mm	45 %
February	28.1 °C	26 mm	36 %
March	29.5 °C	27 mm	36 %
April	31.1 °C	32 mm	41 %
May	31.4 °C	93 mm	53 %
June	30.3 °C	196 mm	70 %
July	30.6 °C	122 mm	60 %
August	31.0 °C	156 mm	60 %
September	30.4 °C	188 mm	69 %
October	29.1 °C	189 mm	65 %
November	27.8 °C	99 mm	51 %
December	27.1 °C	58 mm	45 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	26.8 °C	20.8 °C	23.4 °C	32.2 °C	13.2 °C	26	1
February	28.1 °C	21.6 °C	24.4 °C	35.1 °C	14.7 °C	27	3
March	29.5 °C	22.5 °C	25.5 °C	37.9 °C	12.8 °C	31	11
April	31.1 °C	24.0 °C	27.0 °C	37.6 °C	18.1 °C	30	24
May	31.4 °C	24.8 °C	27.6 °C	37.4 °C	19.6 °C	31	25
June	30.3 °C	25.1 °C	27.3 °C	35.5 °C	22.3 °C	30	18
July	30.6 °C	25.0 °C	27.4 °C	34.1 °C	22.2 °C	31	23
August	31.0 °C	25.0 °C	27.5 °C	34.7 °C	22.8 °C	31	24
September	30.4 °C	24.7 °C	27.1 °C	35.4 °C	22.0 °C	30	20
October	29.1 °C	23.6 °C	25.9 °C	32.9 °C	18.3 °C	31	9
November	27.8 °C	22.0 °C	24.5 °C	32.8 °C	14.8 °C	29	1
December	27.1 °C	21.2 °C	23.7 °C	30.9 °C	13.8 °C	28	0

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind	Sea temp
January	53 mm	12	11 h/day	45 %	80 %	18 km/h	25.8 °C
February	26 mm	7	12 h/day	36 %	77 %	19 km/h	26.2 °C
March	27 mm	6	12 h/day	36 %	73 %	20 km/h	26.7 °C
April	32 mm	7	13 h/day	41 %	73 %	21 km/h	27.9 °C
May	93 mm	15	13 h/day	53 %	76 %	20 km/h	28.9 °C
June	196 mm	21	13 h/day	70 %	83 %	19 km/h	29.2 °C
July	122 mm	21	13 h/day	60 %	82 %	18 km/h	29.3 °C
August	156 mm	23	13 h/day	60 %	82 %	17 km/h	29.8 °C
September	188 mm	25	12 h/day	69 %	85 %	15 km/h	29.9 °C
October	189 mm	21	12 h/day	65 %	86 %	15 km/h	29.0 °C
November	99 mm	15	11 h/day	51 %	83 %	16 km/h	27.5 °C
December	58 mm	13	11 h/day	45 %	82 %	16 km/h	26.5 °C

How Chetumal compares

The same four figures for nearby destinations, so the numbers above have something to be read against. Summer high is the warmest month's average high; winter low is the coldest month's average low.

Destination	Summer high	Winter low	Rain per year	Days above 25 °C
Chetumal	31 °C	21 °C	1,240 mm	354
Belmopan · Belize	32 °C	20 °C	1,285 mm	343
Campeche · Mexico	35 °C	21 °C	844 mm	355
Mérida · Mexico	36 °C	19 °C	704 mm	354
Cancún · Mexico	30 °C	22 °C	1,217 mm	332
San Pedro Sula · Honduras	32 °C	20 °C	1,873 mm	335
La Ceiba · Honduras	30 °C	22 °C	2,338 mm	337

Where Chetumal ranks

Ranking	Position	Value
Warmest sea temperatures in the world in September	32nd of 50	30 °C
The warmest places in North America in March	34th of 50	30 °C
The warmest places in North America in April	40th of 50	31 °C
The warmest places in North America in February	40th of 50	28 °C
The warmest places in North America in May	44th of 50	31 °C
The warmest places in North America year-round	44th of 50	29 °C

Planning a trip? See the best time to visit Chetumal.

QuestionsCommon questions about Chetumal’s climate

When is the best time to visit Chetumal?

That depends on what you want, so the honest answer is a comparison rather than a single month. January, February, December sit closest to 20 °C on average, May is the warmest month and February the driest. The month-by-month table above has the full picture.

How hot does Chetumal get?

In May, the warmest month, daily highs average 31 °C. About 158 days a year pass 30 °C. The highest value in the 1991–2020 record is 38 °C.

How cold does it get in winter?

Nights average 21 °C in January, the coldest month. Freezing nights are not part of a normal year here.

Which month is wettest in Chetumal?

June, averaging 196 mm over 21 days with rain. The driest month is February with 26 mm. The year as a whole averages 1,240 mm.

Are these figures a forecast?

No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Chetumal rather than what any particular week will bring. Individual years can differ substantially from the normal.

Data sources and method

ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
Open-Meteo — Open-Meteo.com. CC BY 4.0
NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
GeoNames — GeoNames.org. CC BY 4.0

Normal period: 1991–2020
Data point: 18.520°, -88.304° (the coordinates the reanalysis values are taken for)
Dataset version: era5-1991-2020-scores1.1
Last processed: 1 August 2026

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.