San Lorenzo climate

Name: San Lorenzo
Address: PY

San Lorenzo is warmest in January, with average highs of 32 °C, and coldest in July, when nights average 14 °C. October is the wettest month (200 mm) and August the driest (68 mm). Figures are 1991–2020 climate normals.

Across a full year San Lorenzo averages 1,599 mm of rain and 259 days above 25 °C.

Paraguay · population 227,876 · 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 January 32 °C
Coldest month July 14 °C
Driest month August 68 mm
Wettest month October 200 mm
Least cloud August 40 % cloud
Hottest on record October 42 °C
Coldest on record July 1.0 °C

What to expectSan Lorenzo through the year

San Lorenzo has a clear annual cycle: average daily highs run from 22 °C in July to 32 °C in January, a swing of 11 °C in mean temperature across the year.

Counted across a normal year, 259 days a year reach 25 °C, 133 of them reach 30 °C. The warmest reading in the 1991–2020 record is 42 °C, in October.

Rain is strongly seasonal. October averages 200 mm against 68 mm in August — 2.9 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	32.1 °C	123 mm	51 %
February	31.3 °C	140 mm	52 %
March	30.2 °C	121 mm	47 %
April	27.6 °C	154 mm	46 %
May	23.5 °C	138 mm	52 %
June	22.1 °C	105 mm	53 %
July	21.8 °C	80 mm	46 %
August	24.7 °C	68 mm	40 %
September	26.7 °C	111 mm	44 %
October	28.6 °C	200 mm	53 %
November	29.6 °C	194 mm	49 %
December	31.1 °C	165 mm	52 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	32.1 °C	23.8 °C	27.7 °C	38.0 °C	15.8 °C	31	25
February	31.3 °C	23.3 °C	27.0 °C	37.8 °C	14.5 °C	28	19
March	30.2 °C	22.1 °C	25.9 °C	38.6 °C	10.9 °C	29	17
April	27.6 °C	19.6 °C	23.1 °C	36.3 °C	6.9 °C	22	9
May	23.5 °C	16.1 °C	19.4 °C	32.9 °C	3.9 °C	12	2
June	22.1 °C	14.8 °C	17.9 °C	30.3 °C	1.3 °C	10	0
July	21.8 °C	13.5 °C	17.1 °C	32.5 °C	1.0 °C	11	0
August	24.7 °C	15.0 °C	19.2 °C	35.9 °C	1.4 °C	16	6
September	26.7 °C	16.8 °C	21.2 °C	39.5 °C	3.9 °C	18	9
October	28.6 °C	19.7 °C	23.7 °C	41.6 °C	8.3 °C	25	11
November	29.6 °C	20.5 °C	24.7 °C	39.9 °C	9.4 °C	27	13
December	31.1 °C	22.6 °C	26.6 °C	38.7 °C	12.3 °C	31	21

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	123 mm	12	14 h/day	51 %	71 %	17 km/h
February	140 mm	12	13 h/day	52 %	73 %	16 km/h
March	121 mm	11	12 h/day	47 %	73 %	16 km/h
April	154 mm	9	12 h/day	46 %	75 %	17 km/h
May	138 mm	9	11 h/day	52 %	78 %	17 km/h
June	105 mm	8	11 h/day	53 %	78 %	18 km/h
July	80 mm	7	11 h/day	46 %	75 %	19 km/h
August	68 mm	7	11 h/day	40 %	69 %	20 km/h
September	111 mm	9	12 h/day	44 %	68 %	20 km/h
October	200 mm	12	13 h/day	53 %	72 %	20 km/h
November	194 mm	11	13 h/day	49 %	71 %	19 km/h
December	165 mm	13	14 h/day	52 %	72 %	18 km/h

How San Lorenzo 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 Lorenzo	32 °C	14 °C	1,599 mm	259
Asunción · Paraguay	32 °C	14 °C	1,577 mm	259
Formosa · Argentina	32 °C	13 °C	1,569 mm	248
Ituzaingó · Argentina	31 °C	12 °C	1,684 mm	221
Corrientes · Argentina	31 °C	12 °C	1,523 mm	219
Posadas · Argentina	31 °C	12 °C	1,721 mm	222
Resistencia · Argentina	32 °C	12 °C	1,470 mm	221

Where San Lorenzo ranks

Ranking	Position	Value
The warmest places in South America in January	13th of 50	32 °C
The warmest places in South America in December	25th of 50	31 °C
The warmest places in South America in February	33rd of 50	31 °C
The warmest places in South America in March	46th of 50	30 °C

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

QuestionsCommon questions about San Lorenzo’s climate

When is the best time to visit San Lorenzo?

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

How hot does San Lorenzo get?

In January, the warmest month, daily highs average 32 °C. About 133 days a year pass 30 °C. The highest value in the 1991–2020 record is 42 °C.

How cold does it get in winter?

Nights average 14 °C in July, the coldest month. Freezing nights are not part of a normal year here.

Which month is wettest in San Lorenzo?

October, averaging 200 mm over 12 days with rain. The driest month is August with 68 mm. The year as a whole averages 1,599 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 Lorenzo 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: -25.340°, -57.509° (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.