San Miguel climate

Name: San Miguel
Address: SV

San Miguel is warmest in March, with average highs of 36 °C, and coldest in December, when nights average 22 °C. September is the wettest month (345 mm) and January the driest (1.3 mm). Figures are 1991–2020 climate normals.

Across a full year San Miguel averages 1,766 mm of rain and 365 days above 25 °C.

El Salvador · population 247,126 · 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 March 36 °C
Coldest month December 22 °C
Driest month January 1 mm
Wettest month September 345 mm
Least cloud February 21 % cloud
Hottest on record April 41 °C
Coldest on record November 15 °C

What to expectSan Miguel through the year

San Miguel has a clear annual cycle: average daily highs run from 34 °C in December to 36 °C in March, a swing of 3.8 °C in mean temperature across the year.

Counted across a normal year, 365 days a year reach 25 °C, 326 of them reach 30 °C. The warmest reading in the 1991–2020 record is 41 °C, in April.

Rain is strongly seasonal. September averages 345 mm against 1 mm in January — 259 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	34.7 °C	1 mm	21 %
February	35.7 °C	2 mm	21 %
March	36.1 °C	8 mm	28 %
April	35.5 °C	42 mm	46 %
May	33.1 °C	249 mm	73 %
June	31.6 °C	294 mm	81 %
July	33.2 °C	192 mm	70 %
August	32.7 °C	268 mm	74 %
September	30.9 °C	345 mm	82 %
October	30.3 °C	298 mm	76 %
November	31.6 °C	61 mm	49 %
December	33.7 °C	6 mm	26 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	34.7 °C	22.3 °C	28.1 °C	37.9 °C	17.0 °C	31	31
February	35.7 °C	23.2 °C	29.0 °C	39.4 °C	18.2 °C	28	28
March	36.1 °C	24.4 °C	29.7 °C	39.7 °C	18.1 °C	31	31
April	35.5 °C	25.4 °C	29.8 °C	40.8 °C	19.8 °C	30	30
May	33.1 °C	24.9 °C	28.3 °C	40.6 °C	21.4 °C	31	28
June	31.6 °C	24.0 °C	27.2 °C	37.4 °C	21.6 °C	30	25
July	33.2 °C	24.0 °C	28.1 °C	38.8 °C	21.3 °C	31	29
August	32.7 °C	24.0 °C	27.7 °C	39.4 °C	21.6 °C	31	27
September	30.9 °C	23.5 °C	26.5 °C	36.1 °C	21.7 °C	30	21
October	30.3 °C	23.0 °C	26.1 °C	34.3 °C	18.6 °C	31	19
November	31.6 °C	22.2 °C	26.5 °C	36.6 °C	15.3 °C	30	26
December	33.7 °C	22.0 °C	27.4 °C	36.6 °C	16.6 °C	31	31

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	1 mm	0	11 h/day	21 %	53 %	13 km/h
February	2 mm	0	12 h/day	21 %	51 %	13 km/h
March	8 mm	2	12 h/day	28 %	52 %	13 km/h
April	42 mm	9	12 h/day	46 %	61 %	12 km/h
May	249 mm	23	13 h/day	73 %	75 %	9.6 km/h
June	294 mm	24	13 h/day	81 %	82 %	8.7 km/h
July	192 mm	19	13 h/day	70 %	75 %	9.7 km/h
August	268 mm	23	13 h/day	74 %	79 %	9.1 km/h
September	345 mm	27	12 h/day	82 %	85 %	8.4 km/h
October	298 mm	24	12 h/day	76 %	85 %	7.5 km/h
November	61 mm	9	12 h/day	49 %	75 %	8.4 km/h
December	6 mm	1	11 h/day	26 %	61 %	11 km/h

How San Miguel 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 Miguel	36 °C	22 °C	1,766 mm	365
Soyapango · El Salvador	31 °C	20 °C	1,494 mm	354
San Salvador · El Salvador	32 °C	19 °C	1,542 mm	357
Tegucigalpa · Honduras	31 °C	17 °C	1,470 mm	322
Santa Ana · El Salvador	32 °C	19 °C	1,030 mm	356
Danlí · Honduras	32 °C	18 °C	1,111 mm	335

Where San Miguel ranks

Ranking	Position	Value
The driest places in North America in February	1stof 50	1.5 mm
The driest places in North America in January	1stof 50	1.3 mm
The warmest places in North America in December	1stof 50	34 °C
The warmest places in North America in February	1stof 50	36 °C
The warmest places in North America in January	1stof 50	35 °C
The warmest places in North America in March	1stof 50	36 °C

Planning a trip? See the best time to visit San Miguel.

QuestionsCommon questions about San Miguel’s climate

When is the best time to visit San Miguel?

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

How hot does San Miguel get?

In March, the warmest month, daily highs average 36 °C. About 326 days a year pass 30 °C. The highest value in the 1991–2020 record is 41 °C.

How cold does it get in winter?

Nights average 22 °C in December, the coldest month. Freezing nights are not part of a normal year here.

Which month is wettest in San Miguel?

September, averaging 345 mm over 27 days with rain. The driest month is January with 1 mm. The year as a whole averages 1,766 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 Miguel 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
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.