Santiago de Cao weather in September

In September, Santiago de Cao sees average daytime highs of 18°C and overnight lows near 16°C, with 2 mm of rain across 0.2 wet days and about 12 hours of daylight. It is the 11th-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 18°C through the month. The sky is clear or mostly clear about 27% of the time in September, and the air most often feels comfortable.

Daylight stretches from about 11 h 48 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is Santiago de Cao's 5th-clearest and 1st-windiest month. For the whole year in context, see Santiago de Cao's year-round climate.

Daytime high
18°
11th warmest
Overnight low
16°
1st coldest
Rainfall
2 mm
0.2 wet days
Daylight
12 hours
6:13 AM – 6:10 PM
Cloud cover
57%
5th clearest
Wind
19 km/h
1st windiest
Solar energy
6.31 kWh/m²
Travel score
7.3
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 September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 18°C through the month.

A typical September day in Santiago de Cao reaches about 18°C in the afternoon and slips back to 16°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 20°C. Set against its neighbours, September runs on par with August and on par with October.

10°13°15°18°20°151015202530
Avg high (°C)Avg low (°C)
11916
21916
31816
41816
51816
61816
71816
81816
91816
101816
111816
121816
131816
141816
151816
161816
171816
181816
191816
201816
211816
221816
231816
241816
251816
261816
271816
281816
291816
301816

Santiago de Cao weather by month

How September compares with the rest of the year at a glance. September is the 11th-warmest and 8th-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 September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 27% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 30% of September, with mostly cloudy or overcast conditions the remaining 43%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17327
27228
37129
47129
57030
66832
76733
86733
96535
106436
116238
126139
135941
145842
155644
165545
175347
185347
195149
205050
214951
224951
234852
244852
254753
264852
274753
284753
294852
304852

Chance of precipitation in September

Any precipitation

Santiago de Cao gets around 2 mm of rain over 0.2 wet days in September. 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 1% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
11
21
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

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the comfortable band about 77% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Comfortable (%)Humid (%)Muggy (%)
171263
271263
372253
472253
573243
674233
774233
875223
975223
1076213
1177203
1277203
1378193
1478193
1579183
1679183
1780173
1880173
1980173
2080173
2181163
2281163
2380173
2480173
2580173
2680173
2780182
2880182
2979192
3079192

Wind in September

Winds average 19 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 18 km/h on the calmest days to 19 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202530
Wind speed (km/h)Feels
118light breeze
218light breeze
319light breeze
419light breeze
519light breeze
619light breeze
719light breeze
819light breeze
919light breeze
1019light breeze
1119light breeze
1219light breeze
1319light breeze
1419light breeze
1519light breeze
1619light breeze
1719light breeze
1819light breeze
1919light breeze
2019light breeze
2119light breeze
2219light breeze
2319light breeze
2419light breeze
2519light breeze
2619light breeze
2719light breeze
2819light breeze
2919light breeze
3019light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 48 min at the start of September to 12 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 18 minutes over September. Sunrise moves from 6:21 AM to 6:04 AM, and sunset from 6:12 PM to 6:08 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.86:216:12
211.96:216:12
311.96:206:12
411.96:206:12
511.96:196:12
611.96:186:11
711.96:186:11
811.96:176:11
911.96:176:11
1011.96:166:11
1111.96:166:11
1211.96:156:11
1311.96:146:10
1411.96:146:10
1511.96:136:10
1612.06:136:10
1712.06:126:10
1812.06:116:10
1912.06:116:10
2012.06:106:09
2112.06:106:09
2212.06:096:09
2312.06:086:09
2412.06:086:09
2512.06:076:09
2612.06:076:09
2712.06:066:08
2812.06:066:08
2912.16:056:08
3012.16:046:08

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.31 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 — September's 6.31 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.1Intense
26.2Intense
36.2Intense
46.2Intense
56.2Intense
66.2Intense
76.2Intense
86.2Intense
96.3Intense
106.3Intense
116.3Intense
126.3Intense
136.3Intense
146.3Intense
156.3Intense
166.3Intense
176.3Intense
186.3Intense
196.3Intense
206.3Intense
216.4Intense
226.4Intense
236.4Intense
246.4Intense
256.4Intense
266.4Intense
276.4Intense
286.4Intense
296.4Intense
306.4Intense
Planning a trip in September

Is September a good time to visit Santiago de Cao?

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

7.3
Sightseeing
9th-best month of the year
2.7
Beach & pool
12th-best month of the year

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

What to pack for Santiago de Cao in September

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

In September, Santiago de Cao sees daytime highs around 18°C and nights near 16°C. Pack sun protection.

sun protection

Sea temperature near Santiago de Cao in September

The nearest coast averages about 17°C in September — 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 September

LowModerateHighVery highExtreme

Clear-sky midday UV in September 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
September 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).