Santa Rosa de Viterbo weather in September

In September, Santa Rosa de Viterbo sees average daytime highs of 30°C and overnight lows near 17°C, with 67 mm of rain across 7.3 wet days and about 11.9 hours of daylight. It is the 3rd-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 53% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 36 min at the start of September to 12 h 12 min by month's end. Set against the rest of the year, September is Santa Rosa de Viterbo's 4th-clearest and 1st-windiest month. For the whole year in context, see Santa Rosa de Viterbo's year-round climate.

Daytime high
30°
3rd warmest
Overnight low
17°
5th coldest
Rainfall
67 mm
7.3 wet days
Daylight
11 h 54 min
7:07 AM – 7:00 PM
Cloud cover
43%
4th clearest
Wind
9 km/h
1st windiest
Solar energy
5.66 kWh/m²
Travel score
5.7
out of 10

Santa Rosa de Viterbo 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 30°C through the month.

A typical September day in Santa Rosa de Viterbo reaches about 30°C in the afternoon and slips back to 17°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 34°C. Set against its neighbours, September runs about 2°C warmer than August and on par with October.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12916
22916
32916
43016
53017
63017
73017
83017
93017
103017
113017
123017
133017
143017
153017
163018
173018
183018
193018
203018
213018
223018
233018
243018
253018
263018
273018
283018
293018
303018

Santa Rosa de Viterbo weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 21°23922.313.23.7
Feb30° / 20°16718.112.73.9
Mar29° / 20°14417.212.24.5
Apr29° / 18°598.311.56.1
May26° / 15°446.1117.5
Jun26° / 14°263.210.78.1
Jul26° / 13°212.410.88.3
Aug28° / 15°192.911.37.6
Sep30° / 17°677.311.95.7
Oct30° / 19°10413.112.54.6
Nov30° / 20°15917134.3
Dec29° / 20°20321.713.33.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 53% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 13% of September, with mostly cloudy or overcast conditions the remaining 34%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17822
27822
37822
47723
57624
67525
77426
87327
97228
107228
117030
126931
136931
146832
156634
166535
176535
186436
196337
206238
216139
226040
235941
245842
255743
265644
275644
285545
295446
305446

Chance of precipitation in September

Any precipitation

Santa Rosa de Viterbo gets around 67 mm of rain over 7.3 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 24% and peaks near 36% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
114
215
315
415
516
616
717
817
918
1019
1119
1220
1321
1422
1523
1624
1725
1826
1927
2029
2130
2231
2332
2433
2533
2634
2735
2835
2936
3036

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 41% of days. Sticky, muggy-or-worse air turns up on roughly 6% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
16125131
25926141
35926141
45826151
55627161
65527171
75327182
85128192
95128192
104929203
114729213
124530213
134431224
144231234
154132234
163932245
173833245
183633256
193533266
203333277
213233287
223033298
232933308
242832319
2527313210
2626313311
2725303411
2824293512
2923283613
3022273714

Wind in September

Winds average 9 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 9 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 36 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 36 minutes over September. Sunrise moves from 7:22 AM to 6:54 AM, and sunset from 6:56 PM to 7:04 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.67:226:56
211.67:216:56
311.67:206:57
411.67:196:57
511.67:186:57
611.77:176:58
711.77:166:58
811.77:156:58
911.77:146:58
1011.87:136:59
1111.87:126:59
1211.87:116:59
1311.87:106:59
1411.87:097:00
1511.97:087:00
1611.97:077:00
1711.97:067:00
1811.97:057:01
1911.97:047:01
2012.07:037:01
2112.07:027:01
2212.07:017:02
2312.07:007:02
2412.06:597:02
2512.16:587:03
2612.16:577:03
2712.16:567:03
2812.16:557:03
2912.26:557:04
3012.26:547:04

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.66 kWh/m².

For context, solar energy here swings from a low near 3.9 kWh/m² to a high of 5.99 kWh/m² in October across the year — September's 5.66 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.5Bright
55.5Bright
65.6Bright
75.6Bright
85.6Bright
95.6Bright
105.6Bright
115.6Bright
125.6Bright
135.6Bright
145.7Bright
155.7Bright
165.7Bright
175.7Bright
185.7Bright
195.7Bright
205.7Bright
215.7Bright
225.7Bright
235.7Bright
245.7Bright
255.7Bright
265.7Bright
275.8Bright
285.8Bright
295.8Bright
305.8Bright
Planning a trip in September

Hazard calendar for Santa Rosa de Viterbo

In seasonPeak

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

Santa Rosa de Viterbo's monsoon runs November–March, when most of the year's rain falls.

Monsoon
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Santa Rosa de Viterbo?

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

5.7
Sightseeing
6th-best month of the year
7.6
Beach & pool
4th-best month of the year

September is a reasonable time to visit Santa Rosa de Viterbo for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Santa Rosa de Viterbo in September

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

In September, Santa Rosa de Viterbo sees daytime highs around 30°C and nights near 17°C. Pack light clothes. Worth having: sun protection. About 7 days see rain.

light clothessun protection

UV index in Santa Rosa de Viterbo in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Santa Rosa de Viterbo peaks around January 21 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 10 at about 6 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeJan 21UV 15Jul 10UV 6
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar13Extreme
Apr10Very high
May7Very high
Jun6High
Jul6High
Aug8Very high
Sep9Very high
Oct11Extreme
Nov14Extreme
Dec14Extreme

Air quality in Santa Rosa de Viterbo 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 Santa Rosa de Viterbo is worst in September — around 32 µg/m³ PM2.5 (moderate), about 3.2× the cleanest month (November, 10 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1430 µg/m³Nov 2310 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb12Good
Mar12Good
Apr13Moderate
May15Moderate
Jun15Moderate
Jul16Moderate
Aug23Moderate
Sep32Moderate
Oct16Moderate
Nov10Good
Dec10Good
Location & terrain

Where is Santa Rosa de Viterbo?

Santa Rosa de Viterbo sits at 21.5°S, 47.4°W, 677 m above sea level, in Brazil. The nearest listed city is Cajuru, 23 km away.

Topography around Santa Rosa de Viterbo

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Santa Rosa de Viterbo.

Within 3 km, the terrain around Santa Rosa de Viterbo has only modest variations in elevation — a maximum elevation change of 229 m around an average of 688 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 379 m; within 80 km, large variations in elevation — a maximum elevation change of 1,085 m.

The land around Santa Rosa de Viterbo is covered by trees (35%) and cropland (33%) within 3 km, cropland (41%) and trees (40%) within 16 km, and cropland (45%) and trees (36%) within 80 km.

3 km
229 m
16 km
379 m
80 km
1,085 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Cajuru 23 km · Tambaú 27 km · Santa Rita do Passa Quatro 29 km · Mococa 37 km · Serrana 38 km · Cravinhos 41 km · Santa Cruz das Palmeiras 41 km · Casa Branca 44 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 Santa Rosa de Viterbo (-21.4728°, -47.3631°, elevation 677 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).