Ijuí weather in September

In September, Ijuí sees average daytime highs of 23°C and overnight lows near 13°C, with 156 mm of rain across 10.3 wet days and about 11.8 hours of daylight. It is the 8th-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 23°C through the month. The sky is clear or mostly clear about 39% 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 Ijuí's 7th-clearest and 1st-windiest month. For the whole year in context, see Ijuí's year-round climate.

Daytime high
23°
8th warmest
Overnight low
13°
5th coldest
Rainfall
156 mm
10.3 wet days
Daylight
11 h 48 min
7:35 AM – 7:25 PM
Cloud cover
55%
7th clearest
Wind
13 km/h
1st windiest
Solar energy
4.49 kWh/m²
Travel score
6.8
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 23°C through the month.

A typical September day in Ijuí reaches about 23°C in the afternoon and slips back to 13°C overnight — a 10°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 2°C warmer than August and about 3°C cooler than October.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
12312
22312
32312
42313
52313
62313
72313
82313
92313
102313
112313
122313
132313
142313
152313
162313
172313
182313
192313
202313
212313
222313
232313
242413
252413
262414
272414
282414
292414
302414

Ijuí weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 20°17314.713.64.5
Feb29° / 19°14513.7134.8
Mar29° / 18°13611.712.25.6
Apr26° / 16°16210.111.36.7
May22° / 12°143910.66.9
Jun20° / 11°1449.810.26.3
Jul19° / 10°1579.910.46.3
Aug22° / 11°1088.8117.0
Sep23° / 13°15610.311.86.8
Oct26° / 15°23413.212.76.2
Nov28° / 17°1621113.45.9
Dec30° / 19°17913.113.84.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 39% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 10% of September, with mostly cloudy or overcast conditions the remaining 51%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15446
25347
35248
45149
55050
65050
74852
84852
94852
104852
114852
124852
134951
144951
154951
164951
174951
184951
194951
204951
214951
224951
234951
244951
254951
264951
274753
284654
294753
304654

Chance of precipitation in September

Any precipitation

Ijuí gets around 156 mm of rain over 10.3 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 34% 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 (%)
130
230
330
431
531
631
731
832
932
1032
1132
1233
1333
1433
1534
1634
1735
1835
1935
2036
2136
2237
2337
2438
2538
2639
2739
2839
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 47% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
14928211
24928212
34928222
44927222
54927232
64927232
74926232
84926232
94926232
104826242
114826242
124826243
134826243
144726243
154725243
164725244
174725244
184725234
194725234
204725235
214725235
224625235
234626235
244526246
254426246
264326246
274226247
284226257
294126258
304027258

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 14 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
714light breeze
814light 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 7:53 AM to 7:18 AM, and sunset from 7:18 PM to 7:32 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.47:537:18
211.47:527:18
311.57:517:19
411.57:507:19
511.57:487:20
611.57:477:20
711.67:467:21
811.67:457:21
911.67:447:22
1011.77:427:22
1111.77:417:22
1211.77:407:23
1311.77:397:23
1411.87:377:24
1511.87:367:24
1611.87:357:25
1711.97:347:25
1811.97:337:26
1911.97:317:26
2011.97:307:27
2112.07:297:27
2212.07:287:28
2312.07:267:28
2412.17:257:29
2512.17:247:30
2612.17:237:30
2712.27:217:31
2812.27:207:31
2912.27:197:32
3012.27:187:32

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.49 kWh/m².

For context, solar energy here swings from a low near 2.57 kWh/m² to a high of 6.62 kWh/m² in December across the year — September's 4.49 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.2Bright
24.2Bright
34.2Bright
44.2Bright
54.2Bright
64.3Bright
74.3Bright
84.3Bright
94.3Bright
104.3Bright
114.4Bright
124.4Bright
134.4Bright
144.4Bright
154.5Bright
164.5Bright
174.5Bright
184.5Bright
194.6Bright
204.6Bright
214.6Bright
224.7Bright
234.7Bright
244.7Bright
254.7Bright
264.8Bright
274.8Bright
284.8Bright
294.8Bright
304.8Bright
Planning a trip in September

Is September a good time to visit Ijuí?

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

6.8
Sightseeing
3rd-best month of the year
5.4
Beach & pool
8th-best month of the year

September is a reasonable time to visit Ijuí for sightseeing.

What to pack for Ijuí in September

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

In September, Ijuí sees daytime highs around 23°C and nights near 13°C. Worth packing: light clothes and rain gear. About 10 days see rain.

light clothesrain gear

UV index in Ijuí 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 Ijuí 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 highModerateHighVery highExtremeJan 20UV 14Jun 21UV 4
UV index (midday)Level
Jan14Extreme
Feb13Extreme
Mar11Extreme
Apr8Very high
May5High
Jun4Moderate
Jul4Moderate
Aug5High
Sep8Very high
Oct7High
Nov11Extreme
Dec13Extreme

Air quality in Ijuí 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 Ijuí 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 Ijuí?

Ijuí sits at 28.4°S, 53.9°W, 329 m above sea level, in Brazil. The nearest listed city is Santo Ângelo, 35 km away.

Topography around Ijuí

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

Within 3 km, the terrain around Ijuí has only modest variations in elevation — a maximum elevation change of 154 m around an average of 323 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 236 m; within 80 km, significant variations in elevation — a maximum elevation change of 475 m.

The land around Ijuí is covered by artificial surfaces (47%) and trees (34%) within 3 km, cropland (66%) and trees (26%) within 16 km, and cropland (78%) within 80 km.

3 km
154 m
16 km
236 m
80 km
475 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Santo Ângelo 35 km · Cruz Alta 41 km · Panambi 42 km · Giruá 58 km · Três de Maio 75 km · Tupanciretã 77 km · Santa Rosa 80 km · Palmeira das Missões 80 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 Ijuí (-28.3878°, -53.9147°, elevation 329 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).