San Clemente weather in September

In September, San Clemente sees average daytime highs of 19°C and overnight lows near 15°C, with 0 mm of rain across 0 wet days and about 11.9 hours of daylight. It is the 10th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 19°C through the month. The sky is clear or mostly clear about 80% of the time in September, and the air most often feels comfortable.

Daylight stretches from about 11 h 42 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is San Clemente's 3rd-clearest and 1st-windiest month. For the whole year in context, see San Clemente's year-round climate.

Daytime high: 19°; 10th warmest
Overnight low: 15°; 2nd coldest
Rainfall: 0 mm; 0 wet days
Daylight: 11 h 54 min; 6:01 AM – 5:57 PM
Cloud cover: 22%; 3rd clearest
Wind: 17 km/h; 1st windiest
Solar energy: 6.89 kWh/m²
Travel score: 8.3; out of 10

San Clemente is locality in Ica Department, Peru.

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

← August San Clemente year-round climate October →Best places to visit in September

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 19°C through the month.

A typical September day in San Clemente reaches about 19°C in the afternoon and slips back to 15°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 20°C. Set against its neighbours, September runs on par with August and on par with October.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Avg high (°C)	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19	19
Avg low (°C)	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15

	Avg high (°C)	Avg low (°C)
1	19	15
2	19	15
3	19	15
4	19	15
5	19	15
6	19	15
7	19	15
8	19	15
9	19	15
10	19	15
11	19	15
12	19	15
13	19	15
14	19	15
15	19	15
16	19	15
17	19	15
18	19	15
19	19	15
20	19	15
21	19	15
22	19	15
23	19	15
24	19	15
25	19	15
26	19	15
27	19	15
28	19	15
29	19	15
30	19	15

San Clemente weather by month

How September compares with the rest of the year at a glance. September is the 10th-warmest and 9th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	24° / 21°	4	0.9	12.7	8.1
Feb	25° / 22°	4	1.3	12.5	7.8
Mar	25° / 21°	3	0.8	12.1	8.1
Apr	23° / 20°	1	0.3	11.7	8.7
May	21° / 18°	0	0	11.4	8.7
Jun	20° / 16°	0	0	11.2	8.4
Jul	19° / 15°	0	0	11.3	8.4
Aug	19° / 15°	0	0	11.5	8.4
Sep	19° / 15°	0	0	11.9	8.3
Oct	20° / 16°	0	0	12.3	8.1
Nov	21° / 17°	0	0	12.6	8.1
Dec	23° / 19°	1	0.2	12.8	8.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 80% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 11% of September, with mostly cloudy or overcast conditions the remaining 10%. Skies tend to cloud over as the month goes on.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Clearer (%)	95	95	93	93	93	93	93	92	91	91	91	90	89	89	89	89	89	89	89	89	89	89	89	89	89	89	89	89	89	89
Cloudier (%)	5	5	7	7	7	7	7	8	9	9	9	10	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11

	Clearer (%)	Cloudier (%)
1	95	5
2	95	5
3	93	7
4	93	7
5	93	7
6	93	7
7	93	7
8	92	8
9	91	9
10	91	9
11	91	9
12	90	10
13	89	11
14	89	11
15	89	11
16	89	11
17	89	11
18	89	11
19	89	11
20	89	11
21	89	11
22	89	11
23	89	11
24	89	11
25	89	11
26	89	11
27	89	11
28	89	11
29	89	11
30	89	11

Chance of precipitation in September

Any precipitation

San Clemente gets around 0 mm of rain over 0 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 0% and peaks near 0% on the wettest days.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Rain chance (%)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0

	Rain chance (%)
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	0
10	0
11	0
12	0
13	0
14	0
15	0
16	0
17	0
18	0
19	0
20	0
21	0
22	0
23	0
24	0
25	0
26	0
27	0
28	0
29	0
30	0

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 91% of days. It rarely turns muggy — the humid and sticky bands barely register.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Dry (%)	6	7	7	7	7	7	7	7	7	7	7	6	6	6	6	6	5	5	5	5	5	4	4	4	4	4	4	4	4	4
Comfortable (%)	90	89	89	89	89	89	89	89	89	89	89	90	90	90	90	90	91	91	91	91	91	92	92	92	92	92	93	93	92	92
Humid (%)	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	3	3	4	4

	Dry (%)	Comfortable (%)	Humid (%)
1	6	90	4
2	7	89	4
3	7	89	4
4	7	89	4
5	7	89	4
6	7	89	4
7	7	89	4
8	7	89	4
9	7	89	4
10	7	89	4
11	7	89	4
12	6	90	4
13	6	90	4
14	6	90	4
15	6	90	4
16	6	90	4
17	5	91	4
18	5	91	4
19	5	91	4
20	5	91	4
21	5	91	4
22	4	92	4
23	4	92	4
24	4	92	4
25	4	92	4
26	4	92	4
27	4	93	3
28	4	93	3
29	4	92	4
30	4	92	4

Wind in September

Winds average 17 km/h in September, the windiest month of the year.

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

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Wind speed (km/h)	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17
Feels	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze

	Wind speed (km/h)	Feels
1	17	light breeze
2	17	light breeze
3	17	light breeze
4	17	light breeze
5	17	light breeze
6	17	light breeze
7	17	light breeze
8	17	light breeze
9	17	light breeze
10	17	light breeze
11	17	light breeze
12	17	light breeze
13	17	light breeze
14	17	light breeze
15	17	light breeze
16	17	light breeze
17	17	light breeze
18	17	light breeze
19	17	light breeze
20	17	light breeze
21	17	light breeze
22	17	light breeze
23	17	light breeze
24	17	light breeze
25	17	light breeze
26	17	light breeze
27	17	light breeze
28	17	light breeze
29	17	light breeze
30	17	light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 42 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 24 minutes over September. Sunrise moves from 6:12 AM to 5:51 AM, and sunset from 5:56 PM to 5:57 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Daylight (h)	11.7	11.7	11.8	11.8	11.8	11.8	11.8	11.8	11.8	11.8	11.9	11.9	11.9	11.9	11.9	11.9	11.9	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.1	12.1	12.1	12.1	12.1
Sunrise (AM)	6:12	6:12	6:11	6:10	6:09	6:09	6:08	6:07	6:06	6:06	6:05	6:04	6:03	6:03	6:02	6:01	6:00	6:00	5:59	5:58	5:57	5:57	5:56	5:55	5:54	5:54	5:53	5:52	5:51	5:51
Sunset (PM)	5:56	5:56	5:56	5:56	5:56	5:56	5:56	5:57	5:57	5:57	5:57	5:57	5:57	5:57	5:57	5:57	5:57	5:57	5:57	5:57	5:57	5:57	5:57	5:57	5:57	5:57	5:57	5:57	5:57	5:57

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.7	6:12	5:56
2	11.7	6:12	5:56
3	11.8	6:11	5:56
4	11.8	6:10	5:56
5	11.8	6:09	5:56
6	11.8	6:09	5:56
7	11.8	6:08	5:56
8	11.8	6:07	5:57
9	11.8	6:06	5:57
10	11.8	6:06	5:57
11	11.9	6:05	5:57
12	11.9	6:04	5:57
13	11.9	6:03	5:57
14	11.9	6:03	5:57
15	11.9	6:02	5:57
16	11.9	6:01	5:57
17	11.9	6:00	5:57
18	12.0	6:00	5:57
19	12.0	5:59	5:57
20	12.0	5:58	5:57
21	12.0	5:57	5:57
22	12.0	5:57	5:57
23	12.0	5:56	5:57
24	12.0	5:55	5:57
25	12.0	5:54	5:57
26	12.1	5:54	5:57
27	12.1	5:53	5:57
28	12.1	5:52	5:57
29	12.1	5:51	5:57
30	12.1	5:51	5:57

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.89 kWh/m².

For context, solar energy here swings from a low near 5.05 kWh/m² to a high of 7.76 kWh/m² in November across the year — September's 6.89 kWh/m² falls in the middle.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Solar energy (kWh/m²)	6.5	6.5	6.5	6.6	6.6	6.6	6.7	6.7	6.7	6.7	6.8	6.8	6.8	6.8	6.9	6.9	6.9	7.0	7.0	7.0	7.0	7.1	7.1	7.1	7.2	7.2	7.2	7.2	7.3	7.3
Level	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense

	Solar energy (kWh/m²)	Level
1	6.5	Intense
2	6.5	Intense
3	6.5	Intense
4	6.6	Intense
5	6.6	Intense
6	6.6	Intense
7	6.7	Intense
8	6.7	Intense
9	6.7	Intense
10	6.7	Intense
11	6.8	Intense
12	6.8	Intense
13	6.8	Intense
14	6.8	Intense
15	6.9	Intense
16	6.9	Intense
17	6.9	Intense
18	7.0	Intense
19	7.0	Intense
20	7.0	Intense
21	7.0	Intense
22	7.1	Intense
23	7.1	Intense
24	7.1	Intense
25	7.2	Intense
26	7.2	Intense
27	7.2	Intense
28	7.2	Intense
29	7.3	Intense
30	7.3	Intense

Planning a trip in September

Is September a good time to visit San Clemente?

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

8.3

Sightseeing

6th-best month of the year

3.6

Beach & pool

11th-best month of the year

September is one of the better times to visit San Clemente for general sightseeing.

What to pack for San Clemente in September

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

In September, San Clemente sees daytime highs around 19°C and nights near 15°C. Pack sun protection.

sun protection

Sea temperature near San Clemente in September

The nearest coast averages about 16°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 25 km away) is warmest in February at about 21°C and coldest in September near 16°C.

It's comfortable for a long swim from Jan 9 to Apr 1 — about 2.7 months when the water holds above 20°C.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sea temperature (°C)	20	21	21	19	19	18	17	17	16	17	18	19
Comfort	Refreshing	Refreshing	Refreshing	Cool	Cool	Cool	Cool	Cool	Cool	Cool	Cool	Cool

	Sea temperature (°C)	Comfort
Jan	20	Refreshing
Feb	21	Refreshing
Mar	21	Refreshing
Apr	19	Cool
May	19	Cool
Jun	18	Cool
Jul	17	Cool
Aug	17	Cool
Sep	16	Cool
Oct	17	Cool
Nov	18	Cool
Dec	19	Cool

UV index in San Clemente in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in San Clemente peaks around February 13 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 9 (very high).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	15	17	14	13	10	9	9	11	12	14	14	14
Level	Extreme	Extreme	Extreme	Extreme	Extreme	Very high	Very high	Extreme	Extreme	Extreme	Extreme	Extreme

	UV index (midday)	Level
Jan	15	Extreme
Feb	17	Extreme
Mar	14	Extreme
Apr	13	Extreme
May	10	Extreme
Jun	9	Very high
Jul	9	Very high
Aug	11	Extreme
Sep	12	Extreme
Oct	14	Extreme
Nov	14	Extreme
Dec	14	Extreme

Location & terrain

Where is San Clemente?

San Clemente sits at 13.7°S, 76.2°W, 80 m above sea level, in Peru. The nearest listed city is Pisco, 8.0 km away.

Topography around San Clemente

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

Within 3 km, the terrain around San Clemente has only modest variations in elevation — a maximum elevation change of 91 m around an average of 70 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 333 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,478 m.

The land around San Clemente is covered by bare terrain (31%) and shrubs (20%) within 3 km, bare terrain (37%) and water (25%) within 16 km, and bare terrain (47%) and water (34%) within 80 km.

3 km

91 m

bare terrain 31%

16 km

333 m

bare terrain 37%

80 km

4,478 m

bare terrain 47%

treesshrubsgrasslandcroplandartificial surfacesbare terrainwater

← August San Clemente year-round climate October →Best places to visit in September

September weather nearby: Pisco 8.0 km · Paracas 26 km · Chincha Alta 29 km · Ica 64 km · Nuevo Imperial 68 km · San Vicente de Cañete 70 km · Imperial 71 km · Mala 124 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

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 San Clemente (-13.6667°, -76.15°, elevation 80 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).

	Avg high (°C)	Avg low (°C)
1	19	15
2	19	15
3	19	15
4	19	15
5	19	15
6	19	15
7	19	15
8	19	15
9	19	15
10	19	15
11	19	15
12	19	15
13	19	15
14	19	15
15	19	15
16	19	15
17	19	15
18	19	15
19	19	15
20	19	15
21	19	15
22	19	15
23	19	15
24	19	15
25	19	15
26	19	15
27	19	15
28	19	15
29	19	15
30	19	15

	Clearer (%)	Cloudier (%)
1	95	5
2	95	5
3	93	7
4	93	7
5	93	7
6	93	7
7	93	7
8	92	8
9	91	9
10	91	9
11	91	9
12	90	10
13	89	11
14	89	11
15	89	11
16	89	11
17	89	11
18	89	11
19	89	11
20	89	11
21	89	11
22	89	11
23	89	11
24	89	11
25	89	11
26	89	11
27	89	11
28	89	11
29	89	11
30	89	11

	Rain chance (%)
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	0
10	0
11	0
12	0
13	0
14	0
15	0
16	0
17	0
18	0
19	0
20	0
21	0
22	0
23	0
24	0
25	0
26	0
27	0
28	0
29	0
30	0

	Dry (%)	Comfortable (%)	Humid (%)
1	6	90	4
2	7	89	4
3	7	89	4
4	7	89	4
5	7	89	4
6	7	89	4
7	7	89	4
8	7	89	4
9	7	89	4
10	7	89	4
11	7	89	4
12	6	90	4
13	6	90	4
14	6	90	4
15	6	90	4
16	6	90	4
17	5	91	4
18	5	91	4
19	5	91	4
20	5	91	4
21	5	91	4
22	4	92	4
23	4	92	4
24	4	92	4
25	4	92	4
26	4	92	4
27	4	93	3
28	4	93	3
29	4	92	4
30	4	92	4

	Avg high (°C)	Avg low (°C)
1	19	15
2	19	15
3	19	15
4	19	15
5	19	15
6	19	15
7	19	15
8	19	15
9	19	15
10	19	15
11	19	15
12	19	15
13	19	15
14	19	15
15	19	15
16	19	15
17	19	15
18	19	15
19	19	15
20	19	15
21	19	15
22	19	15
23	19	15
24	19	15
25	19	15
26	19	15
27	19	15
28	19	15
29	19	15
30	19	15

	Clearer (%)	Cloudier (%)
1	95	5
2	95	5
3	93	7
4	93	7
5	93	7
6	93	7
7	93	7
8	92	8
9	91	9
10	91	9
11	91	9
12	90	10
13	89	11
14	89	11
15	89	11
16	89	11
17	89	11
18	89	11
19	89	11
20	89	11
21	89	11
22	89	11
23	89	11
24	89	11
25	89	11
26	89	11
27	89	11
28	89	11
29	89	11
30	89	11

	Rain chance (%)
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	0
10	0
11	0
12	0
13	0
14	0
15	0
16	0
17	0
18	0
19	0
20	0
21	0
22	0
23	0
24	0
25	0
26	0
27	0
28	0
29	0
30	0

	Dry (%)	Comfortable (%)	Humid (%)
1	6	90	4
2	7	89	4
3	7	89	4
4	7	89	4
5	7	89	4
6	7	89	4
7	7	89	4
8	7	89	4
9	7	89	4
10	7	89	4
11	7	89	4
12	6	90	4
13	6	90	4
14	6	90	4
15	6	90	4
16	6	90	4
17	5	91	4
18	5	91	4
19	5	91	4
20	5	91	4
21	5	91	4
22	4	92	4
23	4	92	4
24	4	92	4
25	4	92	4
26	4	92	4
27	4	93	3
28	4	93	3
29	4	92	4
30	4	92	4

	Avg high (°C)	Avg low (°C)
1	19	15
2	19	15
3	19	15
4	19	15
5	19	15
6	19	15
7	19	15
8	19	15
9	19	15
10	19	15
11	19	15
12	19	15
13	19	15
14	19	15
15	19	15
16	19	15
17	19	15
18	19	15
19	19	15
20	19	15
21	19	15
22	19	15
23	19	15
24	19	15
25	19	15
26	19	15
27	19	15
28	19	15
29	19	15
30	19	15

	Clearer (%)	Cloudier (%)
1	95	5
2	95	5
3	93	7
4	93	7
5	93	7
6	93	7
7	93	7
8	92	8
9	91	9
10	91	9
11	91	9
12	90	10
13	89	11
14	89	11
15	89	11
16	89	11
17	89	11
18	89	11
19	89	11
20	89	11
21	89	11
22	89	11
23	89	11
24	89	11
25	89	11
26	89	11
27	89	11
28	89	11
29	89	11
30	89	11

	Rain chance (%)
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	0
10	0
11	0
12	0
13	0
14	0
15	0
16	0
17	0
18	0
19	0
20	0
21	0
22	0
23	0
24	0
25	0
26	0
27	0
28	0
29	0
30	0

	Dry (%)	Comfortable (%)	Humid (%)
1	6	90	4
2	7	89	4
3	7	89	4
4	7	89	4
5	7	89	4
6	7	89	4
7	7	89	4
8	7	89	4
9	7	89	4
10	7	89	4
11	7	89	4
12	6	90	4
13	6	90	4
14	6	90	4
15	6	90	4
16	6	90	4
17	5	91	4
18	5	91	4
19	5	91	4
20	5	91	4
21	5	91	4
22	4	92	4
23	4	92	4
24	4	92	4
25	4	92	4
26	4	92	4
27	4	93	3
28	4	93	3
29	4	92	4
30	4	92	4