Santa Cruz weather in September

In September, Santa Cruz sees average daytime highs of 18°C and overnight lows near 7°C, with 58 mm of rain across 5.8 wet days and about 11.8 hours of daylight. It is the 8th-warmest and 5th-wettest month of the year here.

Highs climb over the month, from about 17°C in the first days to 19°C by the end. The sky is clear or mostly clear about 39% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 12 min at the start of September to 12 h 18 min by month's end. Set against the rest of the year, September is Santa Cruz's 8th-clearest and 7th-windiest month. For the whole year in context, see Santa Cruz's year-round climate.

Daytime high: 18°; 8th warmest
Overnight low: 7°; 5th coldest
Rainfall: 58 mm; 5.8 wet days
Daylight: 11 h 48 min; 7:46 AM – 7:33 PM
Cloud cover: 54%; 8th clearest
Wind: 6 km/h; 7th windiest
Solar energy: 4.69 kWh/m²
Travel score: 6.4; out of 10

← August Santa Cruz 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

Highs climb over the month, from about 17°C in the first days to 19°C by the end.

A typical September day in Santa Cruz reaches about 18°C in the afternoon and slips back to 7°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 14°C and 22°C. Set against its neighbours, September runs about 3°C warmer than August and about 3°C cooler than 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)	16	17	17	17	17	17	17	17	17	17	17	17	17	18	18	18	18	18	18	18	18	18	18	19	19	19	19	19	19	19
Avg low (°C)	6	6	6	6	6	6	6	6	6	6	6	6	6	6	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7

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

Santa Cruz weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 5th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	29° / 14°	3	0.6	14.1	7.7
Feb	28° / 14°	5	0.7	13.3	8.2
Mar	26° / 12°	8	1.4	12.3	8.8
Apr	21° / 9°	41	3.4	11.2	7.8
May	17° / 7°	115	7	10.2	5.6
Jun	14° / 5°	195	10.2	9.7	3.9
Jul	14° / 4°	130	8.8	9.9	4.0
Aug	15° / 5°	108	7.8	10.7	4.9
Sep	18° / 7°	58	5.8	11.8	6.4
Oct	21° / 8°	35	4.2	12.9	7.5
Nov	25° / 10°	13	2.2	13.8	8.6
Dec	27° / 12°	10	1.3	14.3	8.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 39% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 12% of September, with mostly cloudy or overcast conditions the remaining 49%.

	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 (%)	46	47	46	47	48	49	50	50	51	52	52	53	53	53	53	53	54	53	53	52	52	52	52	52	52	52	52	52	53	53
Cloudier (%)	54	53	54	53	52	51	50	50	49	48	48	47	47	47	47	47	46	47	47	48	48	48	48	48	48	48	48	48	47	47

	Clearer (%)	Cloudier (%)
1	46	54
2	47	53
3	46	54
4	47	53
5	48	52
6	49	51
7	50	50
8	50	50
9	51	49
10	52	48
11	52	48
12	53	47
13	53	47
14	53	47
15	53	47
16	53	47
17	54	46
18	53	47
19	53	47
20	52	48
21	52	48
22	52	48
23	52	48
24	52	48
25	52	48
26	52	48
27	52	48
28	52	48
29	53	47
30	53	47

Chance of precipitation in September

Any precipitation

Santa Cruz gets around 58 mm of rain over 5.8 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 20% and peaks near 24% on the wettest days. The odds ease toward the end of the month.

	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 (%)	24	24	24	24	23	23	23	22	22	21	21	21	20	20	19	19	18	18	18	17	17	17	17	17	17	16	16	16	16	16

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

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 100% 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 (%)	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100

Wind in September

Winds average 6 km/h in September.

Across September, daily wind ranges from about 6 km/h on the calmest days to 6 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)	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

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

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 12 min at the start of September to 12 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 66 minutes over September. Sunrise moves from 8:08 AM to 7:26 AM, and sunset from 7:22 PM to 7:44 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)	11.2	11.3	11.3	11.3	11.4	11.4	11.5	11.5	11.5	11.6	11.6	11.6	11.7	11.7	11.7	11.8	11.8	11.9	11.9	11.9	12.0	12.0	12.0	12.1	12.1	12.2	12.2	12.2	12.3	12.3
Sunrise (AM)	8:08	8:07	8:05	8:04	8:02	8:01	7:59	7:58	7:57	7:55	7:54	7:52	7:51	7:49	7:48	7:46	7:45	7:43	7:42	7:40	7:39	7:37	7:36	7:34	7:33	7:31	7:30	7:28	7:27	7:26
Sunset (PM)	7:22	7:23	7:24	7:25	7:25	7:26	7:27	7:27	7:28	7:29	7:30	7:30	7:31	7:32	7:33	7:33	7:34	7:35	7:36	7:36	7:37	7:38	7:39	7:39	7:40	7:41	7:42	7:42	7:43	7:44

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.2	8:08	7:22
2	11.3	8:07	7:23
3	11.3	8:05	7:24
4	11.3	8:04	7:25
5	11.4	8:02	7:25
6	11.4	8:01	7:26
7	11.5	7:59	7:27
8	11.5	7:58	7:27
9	11.5	7:57	7:28
10	11.6	7:55	7:29
11	11.6	7:54	7:30
12	11.6	7:52	7:30
13	11.7	7:51	7:31
14	11.7	7:49	7:32
15	11.7	7:48	7:33
16	11.8	7:46	7:33
17	11.8	7:45	7:34
18	11.9	7:43	7:35
19	11.9	7:42	7:36
20	11.9	7:40	7:36
21	12.0	7:39	7:37
22	12.0	7:37	7:38
23	12.0	7:36	7:39
24	12.1	7:34	7:39
25	12.1	7:33	7:40
26	12.2	7:31	7:41
27	12.2	7:30	7:42
28	12.2	7:28	7:42
29	12.3	7:27	7:43
30	12.3	7:26	7:44

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.69 kWh/m².

For context, solar energy here swings from a low near 2.09 kWh/m² to a high of 8.75 kWh/m² in December across the year — September's 4.69 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)	3.9	3.9	4.0	4.0	4.1	4.2	4.2	4.3	4.3	4.4	4.5	4.5	4.6	4.6	4.7	4.7	4.8	4.8	4.9	5.0	5.0	5.0	5.1	5.1	5.2	5.2	5.3	5.3	5.4	5.4
Level	Moderate	Moderate	Moderate	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	3.9	Moderate
2	3.9	Moderate
3	4.0	Moderate
4	4.0	Bright
5	4.1	Bright
6	4.2	Bright
7	4.2	Bright
8	4.3	Bright
9	4.3	Bright
10	4.4	Bright
11	4.5	Bright
12	4.5	Bright
13	4.6	Bright
14	4.6	Bright
15	4.7	Bright
16	4.7	Bright
17	4.8	Bright
18	4.8	Bright
19	4.9	Bright
20	5.0	Bright
21	5.0	Bright
22	5.0	Bright
23	5.1	Bright
24	5.1	Bright
25	5.2	Bright
26	5.2	Bright
27	5.3	Bright
28	5.3	Bright
29	5.4	Bright
30	5.4	Bright

Planning a trip in September

Hazard calendar for Santa Cruz

In seasonPeak

None of Santa Cruz's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Santa Cruz's rainy season runs May–August, when most of the year's rain falls.

Rainy season

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is September a good time to visit Santa Cruz?

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

6.4

Sightseeing

8th-best month of the year

2.0

Beach & pool

8th-best month of the year

September is a reasonable time to visit Santa Cruz for sightseeing.

What to pack for Santa Cruz in September

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

In September, Santa Cruz sees daytime highs around 18°C and nights near 7°C. Worth packing: a warm layer and sun protection. About 6 days see rain.

a warm layersun protection

Sea temperature near Santa Cruz in September

The nearest coast averages about 13°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 69 km away) is warmest in February at about 16°C and coldest in August near 12°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sea temperature (°C)	16	16	16	15	14	13	13	12	13	13	14	15
Comfort	Cool	Cool	Cool	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing

	Sea temperature (°C)	Comfort
Jan	16	Cool
Feb	16	Cool
Mar	16	Cool
Apr	15	Bracing
May	14	Bracing
Jun	13	Bracing
Jul	13	Bracing
Aug	12	Bracing
Sep	13	Bracing
Oct	13	Bracing
Nov	14	Bracing
Dec	15	Bracing

UV index in Santa Cruz in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Santa Cruz peaks around January 16 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 15 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	13	12	10	5	3	2	3	4	6	9	11	12
Level	Extreme	Extreme	Very high	High	Moderate	Moderate	Moderate	Moderate	High	Very high	Extreme	Extreme

	UV index (midday)	Level
Jan	13	Extreme
Feb	12	Extreme
Mar	10	Very high
Apr	5	High
May	3	Moderate
Jun	2	Moderate
Jul	3	Moderate
Aug	4	Moderate
Sep	6	High
Oct	9	Very high
Nov	11	Extreme
Dec	12	Extreme

Air quality in Santa Cruz in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Santa Cruz is worst in May — around 41 µg/m³ PM2.5 (poor), about 2.1× the cleanest month (November, 19 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	34	22	22	29	41	37	37	35	32	24	19	19
Level	Moderate	Moderate	Moderate	Moderate	Poor	Poor	Poor	Moderate	Moderate	Moderate	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	34	Moderate
Feb	22	Moderate
Mar	22	Moderate
Apr	29	Moderate
May	41	Poor
Jun	37	Poor
Jul	37	Poor
Aug	35	Moderate
Sep	32	Moderate
Oct	24	Moderate
Nov	19	Moderate
Dec	19	Moderate

Location & terrain

Where is Santa Cruz?

Santa Cruz sits at 34.6°S, 71.4°W, 174 m above sea level, in Chile. The nearest listed city is Chimbarongo, 31 km away.

Topography around Santa Cruz

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

Within 3 km, the terrain around Santa Cruz has only modest variations in elevation — a maximum elevation change of 35 m around an average of 164 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,083 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,840 m.

The land around Santa Cruz is covered by cropland (41%) and trees (25%) within 3 km, trees (32%) and cropland (31%) within 16 km, and trees (36%) and grassland (28%) within 80 km.

3 km

35 m

cropland 41%

16 km

1,083 m

trees 32%

80 km

3,840 m

trees 36%

treesshrubsgrasslandcroplandartificial surfacesbare terrainwater

← August Santa Cruz year-round climate October →Best places to visit in September

September weather nearby: Chimbarongo 31 km · San Vicente 35 km · San Vicente de Tagua Tagua 35 km · Curicó 40 km · Sagrada Familia 40 km · Rengo 53 km · Molina 53 km · Pichilemu 65 km

Chile travel facts

Travel advisory: Level 2; Exercise Increased Caution
Power plugs: Type C / F / L; 220 V · 50 Hz
Prices: ≈ 48% of US; price level, 2025
GDP per capita: $17,995; 2025
Happiness: 6.3 / 10; World Happiness, 2025
Safe drinking water: 98%; of population, 2024
Homicide rate: 6.3; per 100k, 2023
Road deaths: 14.9; per 100k/yr, 2019
Income group: High; World Bank
English: Moderate; EF EPI 517
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 Santa Cruz (-34.6388°, -71.3658°, elevation 174 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. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. 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	16	6
2	17	6
3	17	6
4	17	6
5	17	6
6	17	6
7	17	6
8	17	6
9	17	6
10	17	6
11	17	6
12	17	6
13	17	6
14	18	6
15	18	7
16	18	7
17	18	7
18	18	7
19	18	7
20	18	7
21	18	7
22	18	7
23	18	7
24	19	7
25	19	7
26	19	7
27	19	7
28	19	7
29	19	7
30	19	7

	Clearer (%)	Cloudier (%)
1	46	54
2	47	53
3	46	54
4	47	53
5	48	52
6	49	51
7	50	50
8	50	50
9	51	49
10	52	48
11	52	48
12	53	47
13	53	47
14	53	47
15	53	47
16	53	47
17	54	46
18	53	47
19	53	47
20	52	48
21	52	48
22	52	48
23	52	48
24	52	48
25	52	48
26	52	48
27	52	48
28	52	48
29	53	47
30	53	47

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

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100

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

	Clearer (%)	Cloudier (%)
1	46	54
2	47	53
3	46	54
4	47	53
5	48	52
6	49	51
7	50	50
8	50	50
9	51	49
10	52	48
11	52	48
12	53	47
13	53	47
14	53	47
15	53	47
16	53	47
17	54	46
18	53	47
19	53	47
20	52	48
21	52	48
22	52	48
23	52	48
24	52	48
25	52	48
26	52	48
27	52	48
28	52	48
29	53	47
30	53	47

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

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100

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

	Clearer (%)	Cloudier (%)
1	46	54
2	47	53
3	46	54
4	47	53
5	48	52
6	49	51
7	50	50
8	50	50
9	51	49
10	52	48
11	52	48
12	53	47
13	53	47
14	53	47
15	53	47
16	53	47
17	54	46
18	53	47
19	53	47
20	52	48
21	52	48
22	52	48
23	52	48
24	52	48
25	52	48
26	52	48
27	52	48
28	52	48
29	53	47
30	53	47

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

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100