Santo Ângelo weather in September

In September, Santo Ângelo sees average daytime highs of 24°C and overnight lows near 14°C, with 159 mm of rain across 10.6 wet days and about 11.8 hours of daylight. It is the 8th-warmest and 6th-wettest month of the year here.

Day-to-day highs hold fairly steady near 24°C through the month. The sky is clear or mostly clear about 40% 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 Santo Ângelo's 6th-clearest and 1st-windiest month. For the whole year in context, see Santo Ângelo's year-round climate.

Daytime high
24°
8th warmest
Overnight low
14°
5th coldest
Rainfall
159 mm
10.6 wet days
Daylight
11 h 48 min
7:36 AM – 7:26 PM
Cloud cover
54%
6th clearest
Wind
13 km/h
1st windiest
Solar energy
4.53 kWh/m²
Travel score
6.9
out of 10

Santo Ângelo is human settlement in Brazil.

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 24°C through the month.

A typical September day in Santo Ângelo reaches about 24°C in the afternoon and slips back to 14°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 30°C. Set against its neighbours, September runs about 2°C warmer than August and about 3°C cooler than October.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
12313
22413
32413
42413
52413
62413
72413
82413
92413
102413
112413
122413
132413
142413
152413
162413
172414
182414
192414
202414
212414
222414
232414
242414
252414
262414
272414
282514
292514
302514

How September really feels in Santo Ângelo

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.

Santo Ângelo weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 20°16714.313.64.3
Feb30° / 20°15714134.5
Mar29° / 19°13511.612.25.4
Apr26° / 16°16910.111.36.7
May22° / 13°1519.310.66.9
Jun20° / 12°1439.810.26.4
Jul20° / 10°1579.710.46.5
Aug22° / 12°1048.6117.1
Sep24° / 14°15910.611.86.9
Oct26° / 16°23613.512.76.1
Nov29° / 17°1621113.45.6
Dec30° / 19°17912.813.84.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 40% 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 50%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15446
25347
35347
45248
55149
65050
75149
84951
94951
104951
114951
124951
135050
145050
155149
165050
175050
185050
195050
205149
215149
225149
235149
245149
255050
265050
274951
284852
294753
304654

Chance of precipitation in September

Any precipitation

Santo Ângelo gets around 159 mm of rain over 10.6 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 35% and peaks near 40% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
131
231
331
432
532
632
733
833
933
1033
1133
1234
1334
1434
1535
1635
1735
1836
1936
2037
2137
2237
2338
2438
2539
2639
2739
2840
2940
3040

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 43% of days. Sticky, muggy-or-worse air turns up on roughly 7% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
14529223
24529233
34529234
44528234
54528244
64528244
74527244
84527244
94527245
104526245
114526245
124426246
134425246
144425247
154425247
164424247
174424248
184424248
194423248
204423248
214423248
224324258
234324259
244224269
254124269
264024279
273924279
283925279
2938252810
3037252810

Wind in September

Winds average 13 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 13 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze

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 7:55 AM to 7:19 AM, and sunset from 7:19 PM to 7:34 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.47:557:19
211.47:537:19
311.57:527:20
411.57:517:20
511.57:507:21
611.57:497:21
711.67:477:22
811.67:467:22
911.67:457:23
1011.77:447:23
1111.77:437:24
1211.77:417:24
1311.77:407:25
1411.87:397:25
1511.87:387:26
1611.87:367:26
1711.97:357:27
1811.97:347:27
1911.97:337:28
2011.97:317:28
2112.07:307:29
2212.07:297:29
2312.07:287:30
2412.17:267:30
2512.17:257:31
2612.17:247:31
2712.27:237:32
2812.27:227:32
2912.27:207:33
3012.27:197:34

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.53 kWh/m².

For context, solar energy here swings from a low near 2.58 kWh/m² to a high of 6.65 kWh/m² in December across the year — September's 4.53 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.2Bright
24.2Bright
34.2Bright
44.3Bright
54.3Bright
64.3Bright
74.3Bright
84.3Bright
94.4Bright
104.4Bright
114.4Bright
124.4Bright
134.5Bright
144.5Bright
154.5Bright
164.5Bright
174.6Bright
184.6Bright
194.6Bright
204.7Bright
214.7Bright
224.7Bright
234.7Bright
244.8Bright
254.8Bright
264.8Bright
274.8Bright
284.8Bright
294.8Bright
304.9Bright
Planning a trip in September

Is September a good time to visit Santo Ângelo?

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

6.9
Sightseeing
2nd-best month of the year
5.8
Beach & pool
8th-best month of the year

September is a reasonable time to visit Santo Ângelo for sightseeing.

What to pack for Santo Ângelo in September

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

In September, Santo Ângelo sees daytime highs around 24°C and nights near 14°C. Worth packing: light clothes, rain gear and sun protection. About 11 days see rain.

light clothesrain gearsun protection

UV index in Santo Ângelo 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 Santo Ângelo peaks around January 20 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 21 at about 4 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateVery highExtremeJan 20UV 14Jun 21UV 4
UV index (midday)Level
Jan14Extreme
Feb13Extreme
Mar11Extreme
Apr8Very high
May5High
Jun4Moderate
Jul4Moderate
Aug5Moderate
Sep8Very high
Oct7High
Nov11Extreme
Dec12Extreme

Air quality in Santo Ângelo 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 Santo Ângelo is worst in September — around 15 µg/m³ PM2.5 (moderate), about 2.8× the cleanest month (March, 6 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1515 µg/m³Mar 166 µg/m³
PM2.5 (µg/m³)Level
Jan6Good
Feb6Good
Mar6Good
Apr6Good
May6Good
Jun7Good
Jul7Good
Aug10Good
Sep15Moderate
Oct9Good
Nov6Good
Dec6Good
Location & terrain

Where is Santo Ângelo?

Santo Ângelo sits at 28.3°S, 54.3°W, 295 m above sea level, in Brazil. The nearest listed city is Giruá, 31 km away.

Topography around Santo Ângelo

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

Within 3 km, the terrain around Santo Ângelo has only modest variations in elevation — a maximum elevation change of 122 m around an average of 254 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 241 m; within 80 km, significant variations in elevation — a maximum elevation change of 481 m.

The land around Santo Ângelo is covered by artificial surfaces (42%) and trees (33%) within 3 km, cropland (58%) and trees (29%) within 16 km, and cropland (69%) and trees (20%) within 80 km.

3 km
122 m
16 km
241 m
80 km
481 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Giruá 31 km · Ijuí 35 km · Santa Rosa 52 km · Três de Maio 59 km · Santo Cristo 66 km · São Luiz Gonzaga 69 km · Panambi 75 km · Cruz Alta 75 km

Brazil travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / N
127 / 220 V · 60 Hz
Prices
≈ 46% of US
price level, 2025
GDP per capita
$10,713
2025
Happiness
6.6 / 10
World Happiness, 2025
Safe drinking water
89%
of population, 2024
Homicide rate
19.3
per 100k, 2023
Road deaths
16
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Low
EF EPI 482
Religion
Roman Catholic 57%Evangelical 27%none 9%other 4%

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 Santo Ângelo (-28.2992°, -54.2631°, elevation 295 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).