Santiago de Cao weather in May

In May, Santiago de Cao sees average daytime highs of 21°C and overnight lows near 18°C, with 1 mm of rain across 0.3 wet days and about 11.6 hours of daylight. It is the 6th-warmest and 11th-wettest month of the year here.

Day-to-day highs hold fairly steady near 21°C through the month. The sky is clear or mostly clear about 29% of the time in May, and the air most often feels humid.

Daylight stretches from about 11 h 42 min at the start of May to 11 h 36 min by month's end. Set against the rest of the year, May is Santiago de Cao's 4th-clearest and 6th-windiest month. For the whole year in context, see Santiago de Cao's year-round climate.

Daytime high
21°
6th warmest
Overnight low
18°
7th coldest
Rainfall
1 mm
0.3 wet days
Daylight
11 h 36 min
6:24 AM – 6:02 PM
Cloud cover
55%
4th clearest
Wind
18 km/h
6th windiest
Solar energy
5.48 kWh/m²
Travel score
7.9
out of 10

Santiago de Cao is human settlement in Peru.

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

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 21°C through the month.

A typical May day in Santiago de Cao reaches about 21°C in the afternoon and slips back to 18°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 23°C. Set against its neighbours, May runs about 2°C cooler than April and about 1°C warmer than June.

15°18°20°23°25°151015202531
Avg high (°C)Avg low (°C)
12219
22219
32219
42119
52119
62119
72119
82118
92118
102118
112118
122118
132118
142118
152118
162118
172118
182118
192118
202118
212118
222118
232118
242118
252118
262118
272018
282018
292018
302018
312018

Santiago de Cao weather by month

How May compares with the rest of the year at a glance. May is the 6th-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan23° / 20°82.312.47.7
Feb25° / 22°163.912.37.4
Mar24° / 21°175.112.17.2
Apr23° / 20°71.711.87.8
May21° / 18°10.311.67.9
Jun20° / 17°1011.57.9
Jul19° / 16°20.111.67.7
Aug18° / 16°30.311.77.6
Sep18° / 16°20.2127.3
Oct19° / 16°20.312.27.2
Nov20° / 17°20.412.47.3
Dec21° / 18°41.112.57.5

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 29% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 29% of May, with mostly cloudy or overcast conditions the remaining 42%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15149
25248
35248
45446
55446
65545
75644
85743
95842
105842
115842
125842
135941
145941
155842
165842
175941
185842
195842
205842
215842
225941
235941
245941
256040
266040
276139
286238
296337
306337
316535

Chance of precipitation in May

Any precipitation

Santiago de Cao gets around 1 mm of rain over 0.3 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 1% and peaks near 2% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
12
22
31
41
51
61
71
81
91
101
111
121
131
141
151
161
171
181
191
201
211
221
231
241
251
261
271
281
291
301
311

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 65% of days. Sticky, muggy-or-worse air turns up on roughly 29% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)
105941
206040
306139
406238
506238
616237
716336
816435
916534
1026434
1126533
1236532
1336532
1436631
1546630
1656530
1756629
1866628
1976627
2086527
2196526
22106525
23116524
24126523
25126622
26136621
27146620
28146719
29156718
30166717
31166816

Wind in May

Winds average 18 km/h in May.

Across May, daily wind ranges from about 17 km/h on the calmest days to 18 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202531
Wind speed (km/h)Feels
117light breeze
217light breeze
317light breeze
417light breeze
517light breeze
617light breeze
717light breeze
817light breeze
917light breeze
1017light breeze
1117light breeze
1217light breeze
1318light breeze
1418light breeze
1518light breeze
1618light breeze
1718light breeze
1818light breeze
1918light breeze
2018light breeze
2118light breeze
2218light breeze
2318light breeze
2418light breeze
2518light breeze
2618light breeze
2718light breeze
2818light breeze
2918light breeze
3018light breeze
3118light breeze

Sunrise & sunset in May

DaylightNight

Daylight runs from about 11 h 42 min at the start of May to 11 h 36 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 6:22 AM to 6:27 AM, and sunset from 6:06 PM to 6:02 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.76:226:06
211.76:236:06
311.76:236:05
411.76:236:05
511.76:236:05
611.76:236:04
711.76:236:04
811.76:236:04
911.76:236:04
1011.76:236:03
1111.76:236:03
1211.76:236:03
1311.76:246:03
1411.66:246:03
1511.66:246:02
1611.66:246:02
1711.66:246:02
1811.66:246:02
1911.66:256:02
2011.66:256:02
2111.66:256:02
2211.66:256:02
2311.66:256:02
2411.66:266:02
2511.66:266:02
2611.66:266:02
2711.66:266:02
2811.66:266:02
2911.66:276:02
3011.66:276:02
3111.66:276:02

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.48 kWh/m².

For context, solar energy here swings from a low near 5.2 kWh/m² to a high of 6.84 kWh/m² in November across the year — May's 5.48 kWh/m² sits near the bottom.

0246151015202531
Solar energy (kWh/m²)Level
15.6Bright
25.6Bright
35.6Bright
45.6Bright
55.6Bright
65.6Bright
75.6Bright
85.6Bright
95.6Bright
105.5Bright
115.5Bright
125.5Bright
135.5Bright
145.5Bright
155.5Bright
165.5Bright
175.5Bright
185.5Bright
195.5Bright
205.4Bright
215.4Bright
225.4Bright
235.4Bright
245.4Bright
255.4Bright
265.4Bright
275.3Bright
285.3Bright
295.3Bright
305.3Bright
315.3Bright
Planning a trip in May

Is May a good time to visit Santiago de Cao?

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

7.9
Sightseeing
1st-best month of the year
4.8
Beach & pool
5th-best month of the year

May is one of the better times to visit Santiago de Cao for general sightseeing.

What to pack for Santiago de Cao in May

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

In May, Santiago de Cao sees daytime highs around 21°C and nights near 18°C. Worth packing: sun protection.

sun protection

Sea temperature near Santiago de Cao in May

The nearest coast averages about 19°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 18 km away) is warmest in February at about 22°C and coldest in October near 17°C.

It's comfortable for a long swim from Jan 3 to Apr 17 — about 3.5 months when the water holds above 20°C.

16°18°20°22°24°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingcomfortable to swim
Sea temperature (°C)Comfort
Jan21Refreshing
Feb22Refreshing
Mar22Refreshing
Apr20Refreshing
May19Cool
Jun19Cool
Jul18Cool
Aug17Cool
Sep17Cool
Oct17Cool
Nov18Cool
Dec19Cool

UV index in Santiago de Cao in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Santiago de Cao peaks around February 15 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeFeb 15UV 16Jun 22UV 9
UV index (midday)Level
Jan15Extreme
Feb16Extreme
Mar15Extreme
Apr13Extreme
May11Extreme
Jun9Very high
Jul10Very high
Aug11Extreme
Sep11Extreme
Oct13Extreme
Nov13Extreme
Dec13Extreme
Location & terrain

Where is Santiago de Cao?

Santiago de Cao sits at 8.0°S, 79.2°W, 18 m above sea level, in Peru. The nearest listed city is Chocope, 19 km away.

Topography around Santiago de Cao

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

Within 3 km, the terrain around Santiago de Cao has only modest variations in elevation — a maximum elevation change of 33 m around an average of 13 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 940 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,279 m.

The land around Santiago de Cao is covered by cropland (53%) and water (21%) within 3 km, water (45%), bare terrain (23%) and cropland (22%) within 16 km, and water (36%) and bare terrain (31%) within 80 km.

3 km
33 m
16 km
940 m
80 km
4,279 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
May weather nearby: Chocope 19 km · Paiján 26 km · Trujillo 29 km · Laredo 34 km · Moche 35 km · San Pedro de Lloc 66 km · Pacasmayo 72 km · Virú 74 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 Santiago de Cao (-7.9589°, -79.2392°, elevation 18 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).