Sullana climate

Name: Sullana
Address: PE

Sullana is warmest in March, with average highs of 33 °C, and coldest in August, when nights average 17 °C. March is the wettest month (119 mm) and August the driest (0.1 mm). Figures are 1991–2020 climate normals.

Across a full year Sullana averages 318 mm of rain and 365 days above 25 °C.

Peru · population 160,789 · 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 33 °C
Coldest month August 17 °C
Driest month August 0 mm
Wettest month March 119 mm
Least cloud August 40 % cloud
Hottest on record March 38 °C
Coldest on record November 14 °C

What to expectSullana through the year

Sullana has a clear annual cycle: average daily highs run from 29 °C in August to 33 °C in March, a swing of 5.3 °C in mean temperature across the year.

Counted across a normal year, 365 days a year reach 25 °C, 228 of them reach 30 °C. The warmest reading in the 1991–2020 record is 38 °C, in March.

Rain is strongly seasonal. March averages 119 mm against 0 mm in August — 1,083 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	32.8 °C	36 mm	72 %
February	32.5 °C	80 mm	83 %
March	32.8 °C	119 mm	83 %
April	32.6 °C	45 mm	66 %
May	31.8 °C	7 mm	52 %
June	29.9 °C	2 mm	45 %
July	28.8 °C	1 mm	43 %
August	28.7 °C	under 1 mm	40 %
September	29.3 °C	1 mm	52 %
October	29.9 °C	3 mm	62 %
November	30.5 °C	7 mm	67 %
December	31.7 °C	17 mm	66 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	32.8 °C	22.0 °C	26.1 °C	36.5 °C	18.0 °C	31	29
February	32.5 °C	23.1 °C	26.7 °C	37.6 °C	20.6 °C	28	25
March	32.8 °C	23.2 °C	26.9 °C	37.9 °C	20.4 °C	31	28
April	32.6 °C	21.9 °C	26.1 °C	37.2 °C	18.5 °C	30	27
May	31.8 °C	20.3 °C	24.8 °C	35.9 °C	16.1 °C	31	26
June	29.9 °C	18.7 °C	23.1 °C	35.1 °C	15.8 °C	30	15
July	28.8 °C	17.5 °C	21.9 °C	33.7 °C	14.5 °C	31	5
August	28.7 °C	17.0 °C	21.5 °C	34.7 °C	14.4 °C	31	4
September	29.3 °C	17.3 °C	21.9 °C	34.7 °C	15.1 °C	30	8
October	29.9 °C	17.7 °C	22.3 °C	34.2 °C	14.4 °C	31	14
November	30.5 °C	18.3 °C	22.9 °C	34.6 °C	14.3 °C	30	19
December	31.7 °C	20.0 °C	24.5 °C	35.6 °C	14.6 °C	31	27

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	36 mm	5	12 h/day	72 %	65 %	20 km/h
February	80 mm	10	12 h/day	83 %	68 %	18 km/h
March	119 mm	11	12 h/day	83 %	68 %	17 km/h
April	45 mm	7	12 h/day	66 %	66 %	18 km/h
May	7 mm	2	12 h/day	52 %	65 %	19 km/h
June	2 mm	1	12 h/day	45 %	67 %	18 km/h
July	1 mm	0	12 h/day	43 %	69 %	18 km/h
August	under 1 mm	0	12 h/day	40 %	68 %	19 km/h
September	1 mm	0	12 h/day	52 %	67 %	19 km/h
October	3 mm	1	12 h/day	62 %	67 %	20 km/h
November	7 mm	2	12 h/day	67 %	67 %	20 km/h
December	17 mm	4	12 h/day	66 %	67 %	20 km/h

How Sullana 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
Sullana	33 °C	17 °C	318 mm	365
Piura · Peru	33 °C	17 °C	298 mm	364
Loja · Ecuador	22 °C	13 °C	1,283 mm	1
Machala · Ecuador	27 °C	20 °C	1,587 mm	221
Chiclayo · Peru	29 °C	16 °C	196 mm	164
Cuenca · Ecuador	19 °C	8.8 °C	1,512 mm	0
Guayaquil · Ecuador	29 °C	21 °C	2,142 mm	356

Where Sullana ranks

Ranking	Position	Value
The warmest places in South America in January	4th of 50	33 °C
The driest places in South America in August	11th of 50	0.1 mm
The warmest places in South America in March	11th of 50	33 °C
The warmest places in South America in February	12th of 50	33 °C
The warmest places in South America in April	14th of 50	33 °C
The warmest places in South America in December	14th of 50	32 °C

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

QuestionsCommon questions about Sullana’s climate

When is the best time to visit Sullana?

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

How hot does Sullana get?

In March, the warmest month, daily highs average 33 °C. About 228 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 17 °C in August, the coldest month. Freezing nights are not part of a normal year here.

Which month is wettest in Sullana?

March, averaging 119 mm over 11 days with rain. The driest month is August with 0 mm. The year as a whole averages 318 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 Sullana 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: -4.904°, -80.685° (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.