Passo Fundo weather in September

In September, Passo Fundo sees average daytime highs of 22°C and overnight lows near 12°C, with 165 mm of rain across 11.6 wet days and about 11.8 hours of daylight. It is the 8th-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 22°C through the month. The sky is clear or mostly clear about 36% 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 Passo Fundo's 6th-clearest and 1st-windiest month. For the whole year in context, see Passo Fundo's year-round climate.

Daytime high
22°
8th warmest
Overnight low
12°
5th coldest
Rainfall
165 mm
11.6 wet days
Daylight
11 h 48 min
7:29 AM – 7:19 PM
Cloud cover
57%
6th clearest
Wind
14 km/h
1st windiest
Solar energy
4.47 kWh/m²
Travel score
6.4
out of 10

Passo Fundo 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 22°C through the month.

A typical September day in Passo Fundo reaches about 22°C in the afternoon and slips back to 12°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 28°C. Set against its neighbours, September runs about 1°C warmer than August and about 2°C cooler than October.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
12211
22211
32212
42212
52212
62212
72212
82212
92212
102212
112212
122212
132212
142212
152212
162212
172212
182212
192212
202212
212212
222212
232212
242212
252212
262212
272213
282213
292213
302313

Passo Fundo weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 18°17516.513.65.3
Feb27° / 18°16715.2135.5
Mar27° / 17°14513.412.26.1
Apr24° / 15°14210.611.36.8
May21° / 11°16510.110.66.4
Jun19° / 10°1501010.26.1
Jul19° / 16610.210.46.1
Aug21° / 10°1189.3116.7
Sep22° / 12°16511.611.86.4
Oct24° / 14°24014.512.76.1
Nov26° / 15°17412.313.46.3
Dec28° / 17°17914.913.85.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 36% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 12% of September, with mostly cloudy or overcast conditions the remaining 52%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15545
25347
35347
45248
55149
65149
75050
85050
94951
104852
114852
124852
134852
144753
154753
164753
174753
184753
194753
204753
214753
224753
234753
244654
254555
264555
274456
284357
294258
304159

Chance of precipitation in September

Any precipitation

Passo Fundo gets around 165 mm of rain over 11.6 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 38% and peaks near 44% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
130
231
331
432
532
633
733
834
935
1035
1136
1237
1337
1438
1539
1639
1740
1840
1941
2042
2142
2242
2343
2443
2543
2643
2744
2844
2944
3044

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 52% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
15832100
25832100
35732110
45732110
55632120
65632120
75532130
85532130
95532130
105432140
115432140
125332150
135332150
145232160
155232160
165232160
175132161
185132161
195132161
205231161
215131171
225131171
235031181
245031181
254931191
264931201
274831201
284731211
294631221
304531221

Wind in September

Winds average 14 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 14 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
114light breeze
214light breeze
314light breeze
414light breeze
514light breeze
614light breeze
714light breeze
814light breeze
914light breeze
1014light breeze
1114light breeze
1214light breeze
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light 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 7:47 AM to 7:12 AM, and sunset from 7:12 PM to 7:26 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.47:477:12
211.47:467:12
311.57:457:13
411.57:447:13
511.57:427:14
611.57:417:14
711.67:407:15
811.67:397:15
911.67:387:16
1011.77:367:16
1111.77:357:17
1211.77:347:17
1311.77:337:17
1411.87:317:18
1511.87:307:18
1611.87:297:19
1711.97:287:19
1811.97:267:20
1911.97:257:20
2011.97:247:21
2112.07:237:21
2212.07:227:22
2312.07:207:22
2412.17:197:23
2512.17:187:23
2612.17:177:24
2712.27:157:25
2812.27:147:25
2912.27:137:26
3012.27:127:26

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.47 kWh/m².

For context, solar energy here swings from a low near 2.6 kWh/m² to a high of 6.51 kWh/m² in December across the year — September's 4.47 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.2Bright
24.2Bright
34.3Bright
44.3Bright
54.3Bright
64.3Bright
74.3Bright
84.3Bright
94.3Bright
104.4Bright
114.4Bright
124.4Bright
134.4Bright
144.4Bright
154.5Bright
164.5Bright
174.5Bright
184.5Bright
194.5Bright
204.5Bright
214.6Bright
224.6Bright
234.6Bright
244.6Bright
254.6Bright
264.6Bright
274.7Bright
284.7Bright
294.7Bright
304.7Bright
Planning a trip in September

Is September a good time to visit Passo Fundo?

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

6.4
Sightseeing
3rd-best month of the year
4.4
Beach & pool
8th-best month of the year

September is a reasonable time to visit Passo Fundo for sightseeing.

What to pack for Passo Fundo in September

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

In September, Passo Fundo sees daytime highs around 22°C and nights near 12°C. Worth packing: rain gear. About 12 days see rain.

rain gear

UV index in Passo Fundo 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 Passo Fundo peaks around January 21 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 highHighModerateHighVery highExtremeJan 21UV 14Jun 21UV 4
UV index (midday)Level
Jan14Extreme
Feb14Extreme
Mar11Extreme
Apr8Very high
May5High
Jun4Moderate
Jul4Moderate
Aug5High
Sep8Very high
Oct7High
Nov12Extreme
Dec13Extreme

Air quality in Passo Fundo 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 Passo Fundo is worst in September — around 15 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (March, 6 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1514 µg/m³Mar 116 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb6Good
Mar6Good
Apr7Good
May7Good
Jun7Good
Jul8Good
Aug11Good
Sep15Moderate
Oct9Good
Nov7Good
Dec6Good
Location & terrain

Where is Passo Fundo?

Passo Fundo sits at 28.3°S, 52.4°W, 689 m above sea level, in Brazil. The nearest listed city is Marau, 29 km away.

Topography around Passo Fundo

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

Within 3 km, the terrain around Passo Fundo has only modest variations in elevation — a maximum elevation change of 131 m around an average of 653 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 287 m; within 80 km, large variations in elevation — a maximum elevation change of 675 m.

The land around Passo Fundo is covered by artificial surfaces (63%) and trees (26%) within 3 km, cropland (62%) and trees (26%) within 16 km, and cropland (67%) and trees (28%) within 80 km.

3 km
131 m
16 km
287 m
80 km
675 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Marau 29 km · Carazinho 37 km · Tapejara 44 km · Getúlio Vargas 45 km · Não-Me-Toque 46 km · Sarandi 62 km · Soledade 63 km · Espumoso 67 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 Passo Fundo (-28.2628°, -52.4067°, elevation 689 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).