Monteros weather in September

In September, Monteros sees average daytime highs of 23°C and overnight lows near 11°C, with 84 mm of precipitation across 11.9 wet days and about 11.8 hours of daylight. It is the 8th-warmest and 9th-wettest month of the year here.

Highs climb over the month, from about 22°C in the first days to 24°C by the end. The sky is clear or mostly clear about 56% 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 Monteros's 3rd-clearest and 2nd-windiest month. For the whole year in context, see Monteros's year-round climate.

Daytime high
23°
8th warmest
Overnight low
11°
5th coldest
Precipitation
84 mm
11.9 wet days
Daylight
11 h 48 min
7:21 AM – 7:12 PM
Cloud cover
39%
3rd clearest
Wind
5 km/h
2nd windiest
Solar energy
5.48 kWh/m²
Travel score
6.8
out of 10

Monteros is human settlement.

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 22°C in the first days to 24°C by the end.

A typical September day in Monteros reaches about 23°C in the afternoon and slips back to 11°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 30°C. Set against its neighbours, September runs about 3°C warmer than August and about 3°C cooler than October.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
12210
22210
32210
42210
52210
62210
72210
82210
92310
102311
112311
122311
132311
142311
152311
162311
172311
182311
192311
202411
212412
222412
232412
242412
252412
262412
272412
282413
292413
302413

Monteros weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan29° / 20°34625.9013.53.6
Feb28° / 19°27624.30134.0
Mar26° / 18°26725.1012.24.4
Apr23° / 15°17819.2011.45.4
May20° / 11°11215.80.210.75.6
Jun18° / 6510.80.310.35.8
Jul18° / 508.31.210.56.3
Aug20° / 569.30.7117.0
Sep23° / 11°8411.90.411.86.8
Oct26° / 15°16318.60.112.75.6
Nov27° / 17°20821.5013.34.7
Dec29° / 19°27423.7013.73.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 56% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 14% of September, with mostly cloudy or overcast conditions the remaining 30%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17228
27129
37129
47129
57030
66931
76931
87030
97030
107030
117030
127129
137129
147129
157228
167228
177228
187228
197129
207129
217129
227030
236931
246931
256832
266832
276733
286733
296535
306535

Chance of precipitation in September

Any precipitationSnow

Monteros gets around 84 mm of rain and snow over 11.9 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 40% and peaks near 51% on the wettest days, and about 0 day brings snow. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)Snow chance (%)
1322
2332
3342
4352
5362
6362
7372
8372
9382
10382
11382
12382
13391
14391
15391
16391
17391
18401
19401
20411
21411
22421
23431
24441
25461
26471
27481
28501
29511
30511

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 85% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
19091
29091
39091
49091
59091
69091
79181
89082
99082
109082
119082
129082
139082
148992
158992
168992
1788102
1886113
1985123
2084133
2183143
2282153
2379174
2478184
2576195
2675205
2773216
2872226
2971227
3069238

Wind in September

Winds average 5 km/h in September.

Across September, daily wind ranges from about 4 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
14calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm

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 7:39 AM to 7:04 AM, and sunset from 7:05 PM to 7:18 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.47:397:05
211.57:387:05
311.57:367:06
411.57:357:06
511.57:347:07
611.67:337:07
711.67:327:07
811.67:317:08
911.67:297:08
1011.77:287:09
1111.77:277:09
1211.77:267:10
1311.87:257:10
1411.87:237:11
1511.87:227:11
1611.87:217:12
1711.97:207:12
1811.97:197:12
1911.97:177:13
2012.07:167:13
2112.07:157:14
2212.07:147:14
2312.07:137:15
2412.17:127:15
2512.17:107:16
2612.17:097:16
2712.17:087:17
2812.27:077:17
2912.27:067:18
3012.27:047:18

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.48 kWh/m².

For context, solar energy here swings from a low near 3.22 kWh/m² to a high of 6.33 kWh/m² in December across the year — September's 5.48 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.1Bright
25.1Bright
35.1Bright
45.2Bright
55.2Bright
65.2Bright
75.3Bright
85.3Bright
95.3Bright
105.3Bright
115.4Bright
125.4Bright
135.4Bright
145.5Bright
155.5Bright
165.5Bright
175.6Bright
185.6Bright
195.6Bright
205.6Bright
215.7Bright
225.7Bright
235.7Bright
245.7Bright
255.7Bright
265.7Bright
275.7Bright
285.7Bright
295.7Bright
305.8Bright
Planning a trip in September

Hazard calendar for Monteros

In seasonPeak

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

Monteros's rainy season runs October–April, 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 Monteros?

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

6.8
Sightseeing
2nd-best month of the year
5.3
Beach & pool
1st-best month of the year

September is a reasonable time to visit Monteros for sightseeing.

What to pack for Monteros in September

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

In September, Monteros sees daytime highs around 23°C and nights near 11°C. Worth packing: light clothes, rain gear and sun protection. About 12 days see rain.

light clothesrain gearsun protection

UV index in Monteros in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Monteros peaks around January 18 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 10 at about 4 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighModerateHighVery highExtremeJan 18UV 14Jul 10UV 4
UV index (midday)Level
Jan14Extreme
Feb14Extreme
Mar12Extreme
Apr7Very high
May6High
Jun4Moderate
Jul4Moderate
Aug6High
Sep8Very high
Oct13Extreme
Nov12Extreme
Dec14Extreme

Air quality in Monteros 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 Monteros is worst in August — around 37 µg/m³ PM2.5 (poor), about 3.8× the cleanest month (May, 10 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModeratePoorModerateGoodAug 2437 µg/m³May 1010 µg/m³
PM2.5 (µg/m³)Level
Jan12Moderate
Feb12Moderate
Mar11Good
Apr10Good
May10Good
Jun12Good
Jul22Moderate
Aug37Poor
Sep36Poor
Oct22Moderate
Nov13Moderate
Dec11Good
Location & terrain

Where is Monteros?

Monteros sits at 27.2°S, 65.5°W, 325 m above sea level, in Argentina. The nearest listed city is Famaillá, 16 km away.

Topography around Monteros

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

Within 3 km, the terrain around Monteros has only modest variations in elevation — a maximum elevation change of 27 m around an average of 355 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 498 m; within 80 km, extreme variations in elevation — a maximum elevation change of 5,270 m.

The land around Monteros is covered by cropland (39%) and trees (34%) within 3 km, cropland (54%) and trees (36%) within 16 km, and trees (34%) and cropland (32%) within 80 km.

3 km
27 m
16 km
498 m
80 km
5,270 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Famaillá 16 km · Bella Vista 25 km · Aguilares 31 km · Yerba Buena 44 km · San Miguel de Tucuman 48 km · Alderetes 53 km · Tafí Viejo 54 km · Termas de Río Hondo 73 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 Monteros (-27.1683°, -65.4989°, elevation 325 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. 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).