Termas de Río Hondo weather in September

In September, Termas de Río Hondo sees average daytime highs of 27°C and overnight lows near 15°C, with 27 mm of rain across 4.1 wet days and about 11.8 hours of daylight. It is the 7th-warmest and 9th-wettest month of the year here.

Highs climb over the month, from about 26°C in the first days to 28°C by the end. The sky is clear or mostly clear about 61% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 24 min at the start of September to 12 h 12 min by month's end. Set against the rest of the year, September is Termas de Río Hondo's 3rd-clearest and 3rd-windiest month. For the whole year in context, see Termas de Río Hondo's year-round climate.

Daytime high
27°
7th warmest
Overnight low
15°
5th coldest
Rainfall
27 mm
4.1 wet days
Daylight
11 h 48 min
7:19 AM – 7:09 PM
Cloud cover
36%
3rd clearest
Wind
11 km/h
3rd windiest
Solar energy
5.14 kWh/m²
Travel score
7.6
out of 10

Termas de Río Hondo is city in Argentina.

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 26°C in the first days to 28°C by the end.

A typical September day in Termas de Río Hondo reaches about 27°C in the afternoon and slips back to 15°C overnight — a 13°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 35°C. Set against its neighbours, September runs about 3°C warmer than August and about 2°C cooler than October.

10°20°30°40°151015202530
Avg high (°C)Avg low (°C)
12613
22613
32613
42614
52714
62714
72714
82714
92714
102714
112714
122714
132714
142714
152715
162715
172815
182815
192815
202815
212815
222815
232815
242816
252816
262816
272816
282816
292916
302916

How September really feels in Termas de Río Hondo

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.

Termas de Río Hondo weather by month

How September compares with the rest of the year at a glance. September is the 7th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan33° / 23°17313.413.53.5
Feb31° / 22°13711.7134.2
Mar29° / 20°13812.712.25.2
Apr26° / 17°751011.46.8
May23° / 14°326.210.77.5
Jun20° / 10°225.110.37.3
Jul21° / 133.110.48.0
Aug24° / 11°122.3118.6
Sep27° / 15°274.111.87.6
Oct30° / 18°668.412.75.4
Nov31° / 20°9010.313.44.3
Dec33° / 22°14012.713.73.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 61% 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 27%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17525
27525
37525
47426
57327
67327
77327
87327
97327
107228
117327
127327
137426
147525
157525
167426
177426
187525
197426
207426
217327
227327
237228
247228
257030
267030
276931
286832
296832
306733

Chance of precipitation in September

Any precipitation

Termas de Río Hondo gets around 27 mm of rain over 4.1 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 19% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%151015202530
Rain chance (%)
110
210
310
410
510
610
711
810
910
1010
1110
1210
1310
1410
1511
1611
1712
1812
1913
2014
2114
2215
2316
2416
2517
2618
2718
2818
2919
3019

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 84% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
188930
288930
388930
488930
589830
689830
789830
889830
988840
1088840
1189830
1289830
1388840
1487940
1587940
1686941
17851041
18851041
19841141
20831241
21821251
22811351
23801451
24791461
25771562
26751672
27751672
28741682
29731683
30721693

Wind in September

Winds average 11 km/h in September.

Across September, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
110calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm

Sunrise & sunset in September

DaylightNight

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

Days grow by about 48 minutes over September. Sunrise moves from 7:36 AM to 7:02 AM, and sunset from 7:02 PM to 7:16 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.47:367:02
211.57:357:02
311.57:347:03
411.57:337:03
511.57:327:04
611.67:317:04
711.67:297:05
811.67:287:05
911.67:277:06
1011.77:267:06
1111.77:257:07
1211.77:237:07
1311.87:227:08
1411.87:217:08
1511.87:207:08
1611.87:197:09
1711.97:177:09
1811.97:167:10
1911.97:157:10
2012.07:147:11
2112.07:137:11
2212.07:117:12
2312.07:107:12
2412.17:097:13
2512.17:087:13
2612.17:077:14
2712.17:057:14
2812.27:047:15
2912.27:037:15
3012.27:027:16

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.14 kWh/m².

For context, solar energy here swings from a low near 2.85 kWh/m² to a high of 6.18 kWh/m² in December across the year — September's 5.14 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.8Bright
44.8Bright
54.9Bright
64.9Bright
74.9Bright
85.0Bright
95.0Bright
105.0Bright
115.1Bright
125.1Bright
135.1Bright
145.2Bright
155.2Bright
165.2Bright
175.3Bright
185.3Bright
195.3Bright
205.3Bright
215.3Bright
225.3Bright
235.3Bright
245.3Bright
255.3Bright
265.3Bright
275.3Bright
285.3Bright
295.3Bright
305.3Bright
Planning a trip in September

Hazard calendar for Termas de Río Hondo

In seasonPeak

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

Termas de Río Hondo's rainy season runs November–March, 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 Termas de Río Hondo?

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

7.6
Sightseeing
3rd-best month of the year
8.0
Beach & pool
1st-best month of the year

September is one of the better times to visit Termas de Río Hondo for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Termas de Río Hondo in September

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

In September, Termas de Río Hondo sees daytime highs around 27°C and nights near 15°C. Pack light clothes. Worth having: sun protection. About 4 days see rain.

light clothessun protection

UV index in Termas de Río Hondo in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Termas de Río Hondo peaks around January 17 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 4 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeHighModerateHighVery highExtremeJan 17UV 14Jun 23UV 4
UV index (midday)Level
Jan14Extreme
Feb14Extreme
Mar12Extreme
Apr7Very high
May6High
Jun4Moderate
Jul4Moderate
Aug6High
Sep8Very high
Oct11Extreme
Nov13Extreme
Dec14Extreme
Location & terrain

Where is Termas de Río Hondo?

Termas de Río Hondo sits at 27.5°S, 64.9°W, 260 m above sea level, in Argentina. The nearest listed city is Bella Vista, 67 km away.

Topography around Termas de Río Hondo

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Termas de Río Hondo.

Within 3 km, the terrain around Termas de Río Hondo has only modest variations in elevation — a maximum elevation change of 47 m around an average of 264 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 119 m; within 80 km, significant variations in elevation — a maximum elevation change of 557 m.

The land around Termas de Río Hondo is covered by trees (40%) and artificial surfaces (28%) within 3 km, trees (32%) and shrubs (26%) within 16 km, and cropland (42%), trees (26%) and shrubs (23%) within 80 km.

3 km
47 m
16 km
119 m
80 km
557 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Bella Vista 67 km · Santiago del Estero 68 km · Famaillá 72 km · Monteros 73 km · Aguilares 75 km · Alderetes 80 km · San Miguel de Tucuman 83 km · Yerba Buena 87 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 Termas de Río Hondo (-27.4936°, -64.8597°, elevation 260 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. 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).