Sullana climate
Sullana (Peru) has a hot desert climate (Köppen BWh). The average temperature over the year is 26 °C79 °F, and about 139 mm5.5 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Sullana climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin |
|---|---|---|---|---|
| Jan | 3493 | 2271 | 2882 | 120.5 |
| Feb | 3493 | 2373 | 2883 | 351.4 |
| Mar | 3494 | 2373 | 2983 | 522.1 |
| Apr | 3494 | 2170 | 2882 | 130.5 |
| May | 3392 | 2067 | 2680 | 40.2 |
| Jun | 3289 | 1864 | 2577 | 20.1 |
| Jul | 3188 | 1763 | 2475 | 20.1 |
| Aug | 3188 | 1762 | 2475 | 10.1 |
| Sep | 3289 | 1763 | 2476 | 10.0 |
| Oct | 3289 | 1864 | 2576 | 40.2 |
| Nov | 3290 | 1865 | 2577 | 40.2 |
| Dec | 3391 | 2068 | 2679 | 70.3 |
| Year | 3494 | 1762 | 2679 | 1395.5 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 60% | 75% | 4.9 | 12:22 |
| Feb | 62% | 82% | 4.7 | 12:16 |
| Mar | 61% | 79% | 5.1 | 12:09 |
| Apr | 60% | 68% | 5.3 | 12:00 |
| May | 61% | 59% | 5.0 | 11:54 |
| Jun | 64% | 59% | 4.8 | 11:50 |
| Jul | 64% | 53% | 5.1 | 11:52 |
| Aug | 63% | 39% | 5.7 | 11:57 |
| Sep | 61% | 40% | 6.2 | 12:05 |
| Oct | 60% | 52% | 6.3 | 12:13 |
| Nov | 60% | 55% | 6.2 | 12:21 |
| Dec | 60% | 63% | 5.6 | 12:24 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Sullana is like
The warmest month is March, with an average high of 34 °C94 °F and a low of 23 °C73 °F. The coldest is August, when highs average 31 °C88 °F and lows 17 °C62 °F. Seasonal differences are small — just 4.6 °C8.3 °F between the warmest and the coolest month.
It is very dry, with only 139 mm5.5 in of precipitation in an average year. The wettest three-month stretch is February–April, which brings 72% of the annual total. Months with less than 20 mm0.8 in on average: April–January. The wettest month is March (52 mm2.1 in), the driest is September (1 mm0.0 in).
Relative humidity ranges from 60% in April to 64% in July. The clearest skies (lowest average cloud amount, 39%) are typical of August. Average wind speed near the ground ranges from 10 km/h (6 mph) in March to 16 km/h (10 mph) in September.
Best time to visit Sullana
Based on these averages, the most comfortable months for sightseeing and outdoor activities are June–November: average highs of 31 °C88 °F to 32 °C90 °F with 1 mm0.0 in to 4 mm0.2 in of precipitation per month.
The most challenging month is April, which is hot, with average highs of 34 °C94 °F.
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Sullana
- Wetter months (January–April) — highs around 34 °C93 °F, lows 2170 to 23 °C73 °F, about 28 mm1.1 in of precipitation a month. Pack very light, breathable clothing, a sun hat and plenty of water.
- Drier months (May–December) — highs 3188 to 33 °C92 °F, lows 1762 to 20 °C68 °F, about 3 mm0.1 in of precipitation a month. Pack very light, breathable clothing, a sun hat and plenty of water and an extra layer for the cooler mornings and evenings.
How Sullana compares
Compared with Piura, about 31 km to the south, Sullana has practically the same average temperature and receives a similar amount of precipitation.
Of the 21 places in Peru covered by World Climates, Sullana is the 4th warmest by annual mean temperature and the 14th wettest by annual precipitation. See all of them on the Peru climate page.
Places in other countries with the most similar temperature and rainfall pattern (seasons shifted for the other hemisphere where needed): Cabo San Lucas (Mexico, BWh), Mbour (Senegal, BSh) and Los Cabos (San José del Cabo) (Mexico, BWh).
Nearby places
- Piura 31 km · 26 °C79 °F · 139 mm5.5 in
- Loja 193 km · 17 °C62 °F · 632 mm25 in
- Machala 200 km · 27 °C81 °F · 501 mm20 in
- Chiclayo 227 km · 21 °C69 °F · 80 mm3.1 in
- Cuenca 292 km · 13 °C56 °F · 986 mm39 in
- Guayaquil 314 km · 28 °C82 °F · 771 mm30 in
- Milagro 331 km · 29 °C83 °F · 912 mm36 in
- Daule 347 km · 28 °C82 °F · 771 mm30 in
Frequently asked questions
What is the warmest month in Sullana?
March is the warmest month in Sullana, with an average high of 34 °C (94 °F) and an average low of 23 °C (73 °F).
What is the coldest month in Sullana?
August is the coldest month, with an average high of 31 °C (88 °F) and an average low of 17 °C (62 °F).
When does it rain the most in Sullana?
March is the wettest month with about 52 mm (2.1 in) of precipitation; September is the driest with about 1 mm (0.0 in).
What is the best time to visit Sullana?
Judging by long-term averages, the most comfortable months are June–November.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 140 m, while Sullana lies at about 60 m. Temperatures on this page were therefore adjusted by +0.5 °C0.9 °F using the standard lapse rate of 6.5 °C per 1,000 m.