Rawson weather in September

In September, Rawson sees average daytime highs of 15°C and overnight lows near 7°C, with 17 mm of rain across 3.6 wet days and about 11.7 hours of daylight. It is the 9th-warmest and 6th-wettest month of the year here.

Highs climb over the month, from about 14°C in the first days to 16°C by the end. The sky is clear or mostly clear about 47% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 hours at the start of September to 12 h 24 min by month's end. Set against the rest of the year, September is Rawson's 8th-clearest and 9th-windiest month. For the whole year in context, see Rawson's year-round climate.

Daytime high
15°
9th warmest
Overnight low
4th coldest
Rainfall
17 mm
3.6 wet days
Daylight
11 h 42 min
7:23 AM – 7:06 PM
Cloud cover
46%
8th clearest
Wind
20 km/h
9th windiest
Solar energy
4.24 kWh/m²
Travel score
5.3
out of 10

Rawson is capital of Chubut, Argentina.

Founded
1865

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 14°C in the first days to 16°C by the end.

A typical September day in Rawson reaches about 15°C in the afternoon and slips back to 7°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 10°C and 19°C. Set against its neighbours, September runs about 2°C warmer than August and about 3°C cooler than October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
1146
2146
3146
4146
5146
6147
7147
8147
9147
10147
11147
12157
13157
14157
15157
16157
17157
18157
19157
20157
21158
22158
23158
24168
25168
26168
27168
28168
29168
30168

How September really feels in Rawson

Once humidity and wind are folded in, September averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Rawson weather by month

How September compares with the rest of the year at a glance. September is the 9th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan25° / 16°132.714.88.6
Feb24° / 16°223.113.88.5
Mar22° / 14°223.512.48.1
Apr19° / 11°203.210.87.3
May15° / 264.69.55.3
Jun12° / 254.58.93.6
Jul11° / 173.99.13.4
Aug13° / 153.710.24.3
Sep15° / 173.611.75.3
Oct18° / 10°163.513.26.9
Nov21° / 12°152.814.57.7
Dec23° / 14°162.815.28.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 47% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 36%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16238
26436
36436
46436
56535
66535
76535
86535
96634
106535
116535
126535
136535
146535
156535
166535
176535
186535
196436
206436
216337
226337
236238
246238
256238
266139
276040
286040
296040
306040

Chance of precipitation in September

Any precipitation

Rawson gets around 17 mm of rain over 3.6 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 12% and peaks near 14% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
112
212
312
412
512
612
712
812
912
1012
1112
1212
1312
1412
1512
1612
1712
1812
1912
2012
2112
2212
2312
2412
2513
2613
2713
2813
2914
3014

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.

0%25%50%75%100%151015202530
Dry (%)
1100
2100
3100
4100
5100
6100
7100
8100
9100
10100
11100
12100
13100
14100
15100
16100
17100
18100
19100
20100
21100
22100
23100
24100
25100
26100
27100
28100
29100
30100

Wind in September

Winds average 20 km/h in September.

Across September, daily wind ranges from about 20 km/h on the calmest days to 20 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202530
Wind speed (km/h)Feels
120light breeze
220light breeze
320light breeze
420light breeze
520breezy
620breezy
720breezy
820breezy
920breezy
1020breezy
1120breezy
1220breezy
1320breezy
1420breezy
1520breezy
1620breezy
1720breezy
1820breezy
1920breezy
2020breezy
2120breezy
2220breezy
2320breezy
2420breezy
2520breezy
2620breezy
2720breezy
2820breezy
2920breezy
3020breezy

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 hours 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 84 minutes over September. Sunrise moves from 7:51 AM to 6:57 AM, and sunset from 6:49 PM to 7:22 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.07:516:49
211.07:506:50
311.17:486:51
411.17:466:52
511.27:446:53
611.27:426:55
711.37:406:56
811.37:396:57
911.47:376:58
1011.47:356:59
1111.57:337:00
1211.57:317:01
1311.67:297:03
1411.67:277:04
1511.77:257:05
1611.77:237:06
1711.87:227:07
1811.87:207:08
1911.97:187:09
2011.97:167:11
2112.07:147:12
2212.07:127:13
2312.17:107:14
2412.17:087:15
2512.27:077:16
2612.27:057:18
2712.37:037:19
2812.37:017:20
2912.46:597:21
3012.46:577:22

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.24 kWh/m².

For context, solar energy here swings from a low near 1.59 kWh/m² to a high of 8.11 kWh/m² in December across the year — September's 4.24 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
13.5Moderate
23.5Moderate
33.5Moderate
43.6Moderate
53.6Moderate
63.7Moderate
73.8Moderate
83.8Moderate
93.9Moderate
103.9Moderate
114.0Moderate
124.0Bright
134.1Bright
144.2Bright
154.2Bright
164.3Bright
174.3Bright
184.4Bright
194.4Bright
204.5Bright
214.5Bright
224.6Bright
234.7Bright
244.7Bright
254.8Bright
264.8Bright
274.9Bright
284.9Bright
295.0Bright
305.0Bright
Planning a trip in September

Is September a good time to visit Rawson?

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

5.3
Sightseeing
8th-best month of the year
0.2
Beach & pool
9th-best month of the year

September is a reasonable time to visit Rawson for sightseeing.

What to pack for Rawson in September

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

In September, Rawson sees daytime highs around 15°C and nights near 7°C. Worth packing: a warm layer and a windbreaker. About 4 days see rain.

a warm layera windbreaker

Sea temperature near Rawson in September

The nearest coast averages about 9°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 20 km away) is warmest in February at about 17°C and coldest in August near 9°C.

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

10°15°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°C)Comfort
Jan17Cool
Feb17Cool
Mar17Cool
Apr15Cool
May13Bracing
Jun12Bracing
Jul10Bracing
Aug9Bracing
Sep9Bracing
Oct11Bracing
Nov13Bracing
Dec15Bracing

UV index in Rawson 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 Rawson peaks around December 22 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 19 at about 1 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateLowModerateVery highExtremeDec 22UV 12Jun 19UV 1
UV index (midday)Level
Jan11Extreme
Feb10Extreme
Mar7High
Apr4Moderate
May2Moderate
Jun1Low
Jul2Low
Aug2Moderate
Sep4Moderate
Oct7High
Nov9Very high
Dec12Extreme
Location & terrain

Where is Rawson?

Rawson sits at 43.3°S, 65.1°W, 3 m above sea level, in Argentina. The nearest listed city is Trelew, 17 km away.

San Antonio OesteViedmaCarmen de PatagonesComodoro RivadaviaCaleta OliviaPico Truncado

Topography around Rawson

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

Within 3 km, the terrain around Rawson has only modest variations in elevation — a maximum elevation change of 19 m around an average of 6 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 189 m; within 80 km, significant variations in elevation — a maximum elevation change of 336 m.

The land around Rawson is covered by shrubs (32%) and grassland (28%) within 3 km, shrubs (45%), water (25%) and grassland (21%) within 16 km, and shrubs (57%) and water (33%) within 80 km.

3 km
19 m
16 km
189 m
80 km
336 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Trelew 17 km · Puerto Madryn 59 km · San Antonio Oeste 286 km · Viedma 326 km · Carmen de Patagones 328 km · Comodoro Rivadavia 342 km · Caleta Olivia 398 km · Pico Truncado 449 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
Roman Catholic 63%none 19%Evangelical 15%Jehovah's Witness and Church of Jesus Christ 1%

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 Rawson (-43.3003°, -65.1056°, elevation 3 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).