Sullana weather in May

In May, Sullana sees average daytime highs of 32°C and overnight lows near 20°C, with 5 mm of rain across 1.8 wet days and about 11.8 hours of daylight. It is the 5th-warmest and 7th-wettest month of the year here.

Highs ease over the month, from about 33°C in the first days to 31°C by the end. The sky is clear or mostly clear about 41% of the time in May, and the air most often feels humid.

Daylight stretches from about 11 h 48 min at the start of May to 11 h 42 min by month's end. Set against the rest of the year, May is Sullana's 5th-clearest and 7th-windiest month. For the whole year in context, see Sullana's year-round climate.

Daytime high
32°
5th warmest
Overnight low
20°
8th coldest
Rainfall
5 mm
1.8 wet days
Daylight
11 h 48 min
6:26 AM – 6:12 PM
Cloud cover
50%
5th clearest
Wind
11 km/h
7th windiest
Solar energy
5.6 kWh/m²
Travel score
5.1
out of 10

Sullana is city in Piura, Peru.

Founded
1783

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 33°C in the first days to 31°C by the end.

A typical May day in Sullana reaches about 32°C in the afternoon and slips back to 20°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 34°C. Set against its neighbours, May runs about 1°C cooler than April and about 3°C warmer than June.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13321
23321
33321
43321
53221
63221
73221
83221
93221
103221
113221
123221
133221
143220
153220
163220
173220
183220
193120
203120
213120
223120
233120
243120
253120
263120
273120
283120
293120
303019
313019

How May really feels in Sullana

Once humidity and wind are folded in, May averages 19 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
19
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in May is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Sullana weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan33° / 22°355.212.33.8
Feb33° / 23°759.912.23.1
Mar33° / 23°11411.2123.0
Apr33° / 22°426.511.93.7
May32° / 20°51.811.85.1
Jun29° / 19°20.811.76.8
Jul28° / 18°10.211.78.1
Aug27° / 17°00.111.88.4
Sep28° / 17°10.4127.7
Oct29° / 18°30.912.16.8
Nov30° / 18°71.812.26.1
Dec31° / 20°193.812.35.0

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 41% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 19% of May, with mostly cloudy or overcast conditions the remaining 40%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15644
25743
35842
46040
56040
66139
76238
86238
96337
106238
116238
126238
136238
146238
156238
166139
176139
186040
195941
205842
215842
225842
235842
245941
255941
266040
276040
286139
296238
306337
316436

Chance of precipitation in May

Any precipitation

Sullana gets around 5 mm of rain over 1.8 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 6% and peaks near 12% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%151015202531
Rain chance (%)
112
212
311
411
510
610
79
89
98
108
117
127
137
146
156
165
175
185
194
204
214
223
233
243
253
263
273
283
293
303
313

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

Most of May feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, May lands in the humid band about 68% of days. Sticky, muggy-or-worse air turns up on roughly 29% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1056377
2058366
3058366
4059356
5061345
6061345
7063334
8063334
9064324
10065323
11066313
12066313
13068302
14168292
15168292
16170281
17170281
18171271
19271261
20272251
21274240
22374230
23375220
24475210
25476200
26575200
27576190
28676180
29676180
30776170
31777160

Wind in May

Winds average 11 km/h in May.

Across May, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm
3111calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 11 h 48 min at the start of May to 11 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over May. Sunrise moves from 6:25 AM to 6:28 AM, and sunset from 6:15 PM to 6:12 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.86:256:15
211.86:256:15
311.86:256:14
411.86:256:14
511.86:256:14
611.86:256:14
711.86:256:14
811.86:256:13
911.86:256:13
1011.86:256:13
1111.86:256:13
1211.86:256:13
1311.86:256:13
1411.86:256:13
1511.86:266:12
1611.86:266:12
1711.86:266:12
1811.86:266:12
1911.86:266:12
2011.86:266:12
2111.86:266:12
2211.86:266:12
2311.86:276:12
2411.86:276:12
2511.86:276:12
2611.86:276:12
2711.76:276:12
2811.76:276:12
2911.76:286:12
3011.76:286:12
3111.76:286:12

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.6 kWh/m².

For context, solar energy here swings from a low near 5.29 kWh/m² to a high of 6.72 kWh/m² in October across the year — May's 5.6 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
35.7Bright
45.7Bright
55.7Bright
65.7Bright
75.7Bright
85.7Bright
95.7Bright
105.7Bright
115.7Bright
125.7Bright
135.7Bright
145.6Bright
155.6Bright
165.6Bright
175.6Bright
185.6Bright
195.6Bright
205.6Bright
215.6Bright
225.6Bright
235.5Bright
245.5Bright
255.5Bright
265.5Bright
275.5Bright
285.5Bright
295.5Bright
305.5Bright
315.5Bright
Planning a trip in May

Is May a good time to visit Sullana?

Our two travel scores rate May for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

5.1
Sightseeing
7th-best month of the year
7.8
Beach & pool
7th-best month of the year

May is a reasonable time to visit Sullana for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Sullana in May

From May's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In May, Sullana sees daytime highs around 32°C and nights near 20°C. Pack light clothes. Worth having: sun protection.

light clothessun protection

Sea temperature near Sullana in May

The nearest coast averages about 20°C in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 49 km away) is warmest in February at about 23°C and coldest in August near 18°C.

It's comfortable for a long swim from Dec 15 to May 28 — about 5.4 months when the water holds above 20°C.

16°18°20°22°24°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan22Refreshing
Feb23Refreshing
Mar23Refreshing
Apr21Refreshing
May20Refreshing
Jun19Cool
Jul19Cool
Aug18Cool
Sep18Cool
Oct19Cool
Nov19Cool
Dec20Refreshing

UV index in Sullana in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Sullana peaks around February 17 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 10 (extreme).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeFeb 17UV 16Jun 23UV 10
UV index (midday)Level
Jan15Extreme
Feb16Extreme
Mar15Extreme
Apr13Extreme
May13Extreme
Jun10Extreme
Jul10Extreme
Aug11Extreme
Sep12Extreme
Oct14Extreme
Nov13Extreme
Dec13Extreme
Location & terrain

Where is Sullana?

Sullana sits at 4.9°S, 80.7°W, 60 m above sea level, in Peru. The nearest listed city is Marcavelica, 4.0 km away.

Topography around Sullana

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Sullana.

Within 3 km, the terrain around Sullana has only modest variations in elevation — a maximum elevation change of 71 m around an average of 61 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 143 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,919 m.

The land around Sullana is covered by artificial surfaces (41%) and trees (22%) within 3 km, shrubs (28%) and bare terrain (28%) within 16 km, and shrubs (31%) and bare terrain (30%) within 80 km.

3 km
71 m
16 km
143 m
80 km
2,919 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Marcavelica 4.0 km · Querecotillo 9.0 km · Piura 31 km · San Martin 31 km · Tambo Grande 38 km · Catacaos 40 km · Paita 52 km · La Unión 56 km

Peru travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type A / B / C
220 V · 60 Hz
Prices
≈ 51% of US
price level, 2025
GDP per capita
$9,684
2025
Happiness
6.0 / 10
World Happiness, 2025
Safe drinking water
49%
of population, 2024
Homicide rate
8.6
per 100k, 2021
Road deaths
13.6
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Moderate
EF EPI 519
Religion
Catholic 76%Evangelical Christian 16%no religion 5%other religions 3%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Sullana (-4.9039°, -80.6853°, elevation 60 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).