San Antonio Oeste weather in September

In September, San Antonio Oeste sees average daytime highs of 17°C and overnight lows near 8°C, with 22 mm of rain across 3.7 wet days and about 11.7 hours of daylight. It is the 8th-warmest and 8th-wettest month of the year here.

Highs climb over the month, from about 16°C in the first days to 18°C by the end. The sky is clear or mostly clear about 45% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 06 min at the start of September to 12 h 24 min by month's end. Set against the rest of the year, September is San Antonio Oeste's 9th-clearest and 11th-windiest month. For the whole year in context, see San Antonio Oeste's year-round climate.

Daytime high: 17°; 8th warmest
Overnight low: 8°; 4th coldest
Rainfall: 22 mm; 3.7 wet days
Daylight: 11 h 42 min; 7:22 AM – 7:06 PM
Cloud cover: 48%; 9th clearest
Wind: 18 km/h; 11th windiest
Solar energy: 4.41 kWh/m²
Travel score: 6.2; out of 10

San Antonio Oeste is city in Río Negro, Argentina.

Founded: 1905

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

← August San Antonio Oeste 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 16°C in the first days to 18°C by the end.

A typical September day in San Antonio Oeste reaches about 17°C in the afternoon and slips back to 8°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 12°C and 21°C. Set against its neighbours, September runs about 2°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)	15	15	16	16	16	16	16	16	16	16	16	16	16	16	17	17	17	17	17	17	17	17	17	17	17	17	18	18	18	18
Avg low (°C)	7	7	7	7	7	7	7	7	7	7	7	8	8	8	8	8	8	8	8	8	8	8	8	9	9	9	9	9	9	9

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

San Antonio Oeste weather by month

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

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	28° / 18°	19	3.3	14.6	8.0
Feb	27° / 17°	23	3.4	13.6	8.1
Mar	24° / 15°	30	3.7	12.3	8.3
Apr	20° / 12°	30	3.6	10.9	7.5
May	16° / 8°	27	4.7	9.8	5.7
Jun	13° / 6°	25	4.6	9.1	4.1
Jul	12° / 5°	21	4	9.4	3.9
Aug	14° / 6°	18	3.2	10.4	5.0
Sep	17° / 8°	22	3.7	11.7	6.2
Oct	20° / 11°	28	4.4	13.1	7.3
Nov	23° / 14°	23	3.8	14.3	8.1
Dec	26° / 16°	15	3	14.9	8.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 45% 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 43%.

	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 (%)	53	53	55	55	56	56	57	57	57	59	59	59	59	59	59	59	59	59	59	58	58	58	58	58	57	57	57	57	57	57
Cloudier (%)	47	47	45	45	44	44	43	43	43	41	41	41	41	41	41	41	41	41	41	42	42	42	42	42	43	43	43	43	43	43

	Clearer (%)	Cloudier (%)
1	53	47
2	53	47
3	55	45
4	55	45
5	56	44
6	56	44
7	57	43
8	57	43
9	57	43
10	59	41
11	59	41
12	59	41
13	59	41
14	59	41
15	59	41
16	59	41
17	59	41
18	59	41
19	59	41
20	58	42
21	58	42
22	58	42
23	58	42
24	58	42
25	57	43
26	57	43
27	57	43
28	57	43
29	57	43
30	57	43

Chance of precipitation in September

Any precipitation

San Antonio Oeste gets around 22 mm of rain over 3.7 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 13% and peaks near 15% 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 (%)	13	13	13	13	13	13	13	13	13	13	13	12	12	12	12	11	11	11	11	11	11	12	12	12	13	13	14	14	15	15

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

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 18 km/h in September.

Across September, daily wind ranges from about 18 km/h on the calmest days to 18 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)	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18
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	18	light breeze
2	18	light breeze
3	18	light breeze
4	18	light breeze
5	18	light breeze
6	18	light breeze
7	18	light breeze
8	18	light breeze
9	18	light breeze
10	18	light breeze
11	18	light breeze
12	18	light breeze
13	18	light breeze
14	18	light breeze
15	18	light breeze
16	18	light breeze
17	18	light breeze
18	18	light breeze
19	18	light breeze
20	18	light breeze
21	18	light breeze
22	18	light breeze
23	18	light breeze
24	18	light breeze
25	18	light breeze
26	18	light breeze
27	18	light breeze
28	18	light breeze
29	18	light breeze
30	18	light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 06 min at the start of September to 12 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 78 minutes over September. Sunrise moves from 7:48 AM to 6:58 AM, and sunset from 6:51 PM to 7:21 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)	11.1	11.1	11.1	11.2	11.2	11.3	11.3	11.4	11.4	11.5	11.5	11.5	11.6	11.6	11.7	11.7	11.8	11.8	11.9	11.9	12.0	12.0	12.1	12.1	12.2	12.2	12.2	12.3	12.3	12.4
Sunrise (AM)	7:48	7:46	7:45	7:43	7:41	7:40	7:38	7:36	7:34	7:33	7:31	7:29	7:27	7:26	7:24	7:22	7:20	7:19	7:17	7:15	7:13	7:12	7:10	7:08	7:06	7:05	7:03	7:01	6:59	6:58
Sunset (PM)	6:51	6:52	6:53	6:54	6:55	6:56	6:57	6:58	6:59	7:00	7:01	7:02	7:03	7:04	7:05	7:06	7:07	7:08	7:09	7:10	7:11	7:12	7:13	7:14	7:15	7:16	7:17	7:18	7:19	7:21

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.1	7:48	6:51
2	11.1	7:46	6:52
3	11.1	7:45	6:53
4	11.2	7:43	6:54
5	11.2	7:41	6:55
6	11.3	7:40	6:56
7	11.3	7:38	6:57
8	11.4	7:36	6:58
9	11.4	7:34	6:59
10	11.5	7:33	7:00
11	11.5	7:31	7:01
12	11.5	7:29	7:02
13	11.6	7:27	7:03
14	11.6	7:26	7:04
15	11.7	7:24	7:05
16	11.7	7:22	7:06
17	11.8	7:20	7:07
18	11.8	7:19	7:08
19	11.9	7:17	7:09
20	11.9	7:15	7:10
21	12.0	7:13	7:11
22	12.0	7:12	7:12
23	12.1	7:10	7:13
24	12.1	7:08	7:14
25	12.2	7:06	7:15
26	12.2	7:05	7:16
27	12.2	7:03	7:17
28	12.3	7:01	7:18
29	12.3	6:59	7:19
30	12.4	6:58	7:21

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.41 kWh/m².

For context, solar energy here swings from a low near 1.81 kWh/m² to a high of 8.15 kWh/m² in December across the year — September's 4.41 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)	3.7	3.7	3.8	3.8	3.9	3.9	4.0	4.0	4.1	4.1	4.2	4.2	4.3	4.3	4.4	4.4	4.5	4.5	4.6	4.6	4.7	4.7	4.8	4.8	4.9	4.9	5.0	5.0	5.1	5.1
Level	Moderate	Moderate	Moderate	Moderate	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

	Solar energy (kWh/m²)	Level
1	3.7	Moderate
2	3.7	Moderate
3	3.8	Moderate
4	3.8	Moderate
5	3.9	Moderate
6	3.9	Moderate
7	4.0	Moderate
8	4.0	Bright
9	4.1	Bright
10	4.1	Bright
11	4.2	Bright
12	4.2	Bright
13	4.3	Bright
14	4.3	Bright
15	4.4	Bright
16	4.4	Bright
17	4.5	Bright
18	4.5	Bright
19	4.6	Bright
20	4.6	Bright
21	4.7	Bright
22	4.7	Bright
23	4.8	Bright
24	4.8	Bright
25	4.9	Bright
26	4.9	Bright
27	5.0	Bright
28	5.0	Bright
29	5.1	Bright
30	5.1	Bright

Planning a trip in September

Is September a good time to visit San Antonio Oeste?

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

6.2

Sightseeing

8th-best month of the year

1.2

Beach & pool

8th-best month of the year

September is a reasonable time to visit San Antonio Oeste for sightseeing.

What to pack for San Antonio Oeste in September

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

In September, San Antonio Oeste sees daytime highs around 17°C and nights near 8°C. Worth packing: a warm layer. About 4 days see rain.

a warm layer

Sea temperature near San Antonio Oeste in September

The nearest coast averages about 11°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 17 km away) is warmest in February at about 19°C and coldest in August near 11°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)	19	19	18	16	15	13	12	11	11	13	15	17
Comfort	Cool	Cool	Cool	Cool	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Cool

	Sea temperature (°C)	Comfort
Jan	19	Cool
Feb	19	Cool
Mar	18	Cool
Apr	16	Cool
May	15	Bracing
Jun	13	Bracing
Jul	12	Bracing
Aug	11	Bracing
Sep	11	Bracing
Oct	13	Bracing
Nov	15	Bracing
Dec	17	Cool

UV index in San Antonio Oeste in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in San Antonio Oeste peaks around December 20 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	11	11	7	5	3	2	2	3	4	7	9	12
Level	Extreme	Extreme	Very high	Moderate	Moderate	Low	Low	Moderate	Moderate	High	Very high	Extreme

	UV index (midday)	Level
Jan	11	Extreme
Feb	11	Extreme
Mar	7	Very high
Apr	5	Moderate
May	3	Moderate
Jun	2	Low
Jul	2	Low
Aug	3	Moderate
Sep	4	Moderate
Oct	7	High
Nov	9	Very high
Dec	12	Extreme

Location & terrain

Where is San Antonio Oeste?

San Antonio Oeste sits at 40.7°S, 64.9°W, 12 m above sea level, in Argentina. The nearest listed city is Viedma, 164 km away.

Topography around San Antonio Oeste

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

Within 3 km, the terrain around San Antonio Oeste has only modest variations in elevation — a maximum elevation change of 26 m around an average of 5 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 162 m; within 80 km, significant variations in elevation — a maximum elevation change of 389 m.

The land around San Antonio Oeste is covered by shrubs (40%) and water (23%) within 3 km, shrubs (53%) and water (34%) within 16 km, and shrubs (73%) and water (21%) within 80 km.

3 km

26 m

shrubs 40%

16 km

162 m

shrubs 53%

80 km

389 m

shrubs 73%

shrubsgrasslandartificial surfacesbare terrainwater

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

September weather nearby: Viedma 164 km · Carmen de Patagones 166 km · Río Colorado 207 km · Puerto Madryn 227 km · Villa Regina 257 km · Trelew 281 km · Rawson 286 km · General Roca 294 km

Argentina travel facts

Travel advisory: Level 1; Exercise Normal Precautions
Power plugs: Type C / I; 220 V · 50 Hz
Prices: ≈ 46% of US; price level, 2025
GDP per capita: $14,898; 2025
Happiness: 6.4 / 10; World Happiness, 2025
Homicide rate: 4.5; per 100k, 2023
Road deaths: 14.1; per 100k/yr, 2019
Income group: Upper middle; World Bank
English: High; EF EPI 575
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 Antonio Oeste (-40.7319°, -64.9477°, elevation 12 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	15	7
2	15	7
3	16	7
4	16	7
5	16	7
6	16	7
7	16	7
8	16	7
9	16	7
10	16	7
11	16	7
12	16	8
13	16	8
14	16	8
15	17	8
16	17	8
17	17	8
18	17	8
19	17	8
20	17	8
21	17	8
22	17	8
23	17	8
24	17	9
25	17	9
26	17	9
27	18	9
28	18	9
29	18	9
30	18	9

	Clearer (%)	Cloudier (%)
1	53	47
2	53	47
3	55	45
4	55	45
5	56	44
6	56	44
7	57	43
8	57	43
9	57	43
10	59	41
11	59	41
12	59	41
13	59	41
14	59	41
15	59	41
16	59	41
17	59	41
18	59	41
19	59	41
20	58	42
21	58	42
22	58	42
23	58	42
24	58	42
25	57	43
26	57	43
27	57	43
28	57	43
29	57	43
30	57	43

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

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

	Clearer (%)	Cloudier (%)
1	53	47
2	53	47
3	55	45
4	55	45
5	56	44
6	56	44
7	57	43
8	57	43
9	57	43
10	59	41
11	59	41
12	59	41
13	59	41
14	59	41
15	59	41
16	59	41
17	59	41
18	59	41
19	59	41
20	58	42
21	58	42
22	58	42
23	58	42
24	58	42
25	57	43
26	57	43
27	57	43
28	57	43
29	57	43
30	57	43

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

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

	Clearer (%)	Cloudier (%)
1	53	47
2	53	47
3	55	45
4	55	45
5	56	44
6	56	44
7	57	43
8	57	43
9	57	43
10	59	41
11	59	41
12	59	41
13	59	41
14	59	41
15	59	41
16	59	41
17	59	41
18	59	41
19	59	41
20	58	42
21	58	42
22	58	42
23	58	42
24	58	42
25	57	43
26	57	43
27	57	43
28	57	43
29	57	43
30	57	43

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

	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