San Luis Río Colorado climate

Name: San Luis Río Colorado
Address: MX

San Luis Río Colorado is warmest in July, with average highs of 42 °C, and coldest in December, when nights average 8.0 °C. February is the wettest month (13 mm) and June the driest (0.6 mm). Figures are 1991–2020 climate normals.

Across a full year San Luis Río Colorado averages 81 mm of rain, 264 days above 25 °C and 0 days below freezing.

Mexico · population 176,685 · 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 July 42 °C
Coldest month December 8.0 °C
Driest month June 1 mm
Wettest month February 13 mm
Least cloud June 10 % cloud
Hottest on record July 50 °C
Coldest on record January -1.2 °C

What to expectSan Luis Río Colorado through the year

San Luis Río Colorado has a clear annual cycle: average daily highs run from 20 °C in December to 42 °C in July, a swing of 21 °C in mean temperature across the year.

Counted across a normal year, 264 days a year reach 25 °C, 207 of them reach 30 °C, 0 nights drop below freezing. The warmest reading in the 1991–2020 record is 50 °C, in July.

Rain is spread fairly evenly through the year, from 1 mm in June to 13 mm in February. There is no dry season to aim for.

Month by month

Month	Avg high	Rainfall	Cloud
January	21.3 °C	9 mm	33 %
February	23.4 °C	13 mm	34 %
March	27.5 °C	9 mm	28 %
April	31.2 °C	3 mm	20 %
May	35.1 °C	1 mm	16 %
June	39.8 °C	1 mm	10 %
July	41.7 °C	4 mm	22 %
August	41.2 °C	10 mm	20 %
September	38.5 °C	12 mm	14 %
October	32.6 °C	5 mm	16 %
November	25.6 °C	5 mm	25 %
December	20.2 °C	10 mm	32 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	21.3 °C	8.5 °C	14.3 °C	29.4 °C	-1.2 °C	4	0
February	23.4 °C	9.8 °C	16.1 °C	31.7 °C	-0.5 °C	11	1
March	27.5 °C	12.5 °C	19.6 °C	38.0 °C	4.2 °C	21	10
April	31.2 °C	15.3 °C	23.0 °C	41.2 °C	6.1 °C	28	19
May	35.1 °C	18.9 °C	26.9 °C	43.4 °C	10.9 °C	31	28
June	39.8 °C	23.1 °C	31.5 °C	48.6 °C	13.1 °C	30	30
July	41.7 °C	27.4 °C	34.4 °C	49.6 °C	20.1 °C	31	31
August	41.2 °C	28.0 °C	34.4 °C	47.2 °C	20.8 °C	31	31
September	38.5 °C	24.7 °C	31.4 °C	48.3 °C	15.4 °C	30	30
October	32.6 °C	18.3 °C	25.2 °C	42.1 °C	5.8 °C	29	24
November	25.6 °C	12.4 °C	18.6 °C	35.2 °C	2.0 °C	17	5
December	20.2 °C	8.0 °C	13.5 °C	27.4 °C	0.6 °C	2	0

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	9 mm	2	10 h/day	33 %	40 %	16 km/h
February	13 mm	2	11 h/day	34 %	39 %	16 km/h
March	9 mm	1	12 h/day	28 %	33 %	17 km/h
April	3 mm	1	13 h/day	20 %	27 %	18 km/h
May	1 mm	0	14 h/day	16 %	27 %	18 km/h
June	1 mm	0	14 h/day	10 %	27 %	17 km/h
July	4 mm	1	14 h/day	22 %	35 %	18 km/h
August	10 mm	2	13 h/day	20 %	39 %	17 km/h
September	12 mm	2	12 h/day	14 %	38 %	15 km/h
October	5 mm	1	11 h/day	16 %	33 %	15 km/h
November	5 mm	1	11 h/day	25 %	33 %	15 km/h
December	10 mm	2	10 h/day	32 %	40 %	15 km/h

How San Luis Río Colorado 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
San Luis Río Colorado	42 °C	8.0 °C	81 mm	264
Mexicali · Mexico	43 °C	9.1 °C	74 mm	265
Ensenada · Mexico	28 °C	9.2 °C	296 mm	111
Tijuana · Mexico	25 °C	9.1 °C	330 mm	46
San Diego · United States	25 °C	8.8 °C	311 mm	63
Escondido · United States	29 °C	5.9 °C	412 mm	134

Where San Luis Río Colorado ranks

Ranking	Position	Value
The driest places in North America in October	1st of 50	5.0 mm
The driest places in North America in November	2nd of 50	4.5 mm
The driest places in North America year-round	2nd of 50	6.8 mm
The warmest places in North America in August	2nd of 50	41 °C
The warmest places in North America in July	2nd of 50	42 °C
The warmest places in North America in September	2nd of 50	38 °C

Planning a trip? See the best time to visit San Luis Río Colorado.

QuestionsCommon questions about San Luis Río Colorado’s climate

When is the best time to visit San Luis Río Colorado?

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

How hot does San Luis Río Colorado get?

In July, the warmest month, daily highs average 42 °C. About 207 days a year pass 30 °C. The highest value in the 1991–2020 record is 50 °C.

How cold does it get in winter?

Nights average 8.0 °C in December, the coldest month. A normal year has 0 nights below freezing.

Which month is wettest in San Luis Río Colorado?

February, averaging 13 mm over 2 days with rain. The driest month is June with 1 mm. The year as a whole averages 81 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 San Luis Río Colorado 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: 32.456°, -114.770° (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.