São José do Vale do Rio Preto weather in September

In September, São José do Vale do Rio Preto sees average daytime highs of 24°C and overnight lows near 15°C, with 93 mm of rain across 11.7 wet days and about 11.9 hours of daylight. It is the 8th-warmest and 8th-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 32% of the time in September, and the air most often feels comfortable.

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 São José do Vale do Rio Preto's 5th-clearest and 1st-windiest month. For the whole year in context, see São José do Vale do Rio Preto's year-round climate.

Daytime high
24°
8th warmest
Overnight low
15°
5th coldest
Rainfall
93 mm
11.7 wet days
Daylight
11 h 54 min
6:50 AM – 6:42 PM
Cloud cover
61%
5th clearest
Wind
7 km/h
1st windiest
Solar energy
4.63 kWh/m²
Travel score
6.7
out of 10

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 São José do Vale do Rio Preto reaches about 24°C in the afternoon and slips back to 15°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 28°C. Set against its neighbours, September runs about 1°C warmer than August and about 1°C cooler than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12414
22414
32414
42414
52414
62415
72415
82415
92415
102415
112415
122415
132415
142415
152415
162415
172415
182415
192415
202415
212415
222415
232415
242415
252416
262416
272416
282416
292416
302416

São José do Vale do Rio Preto 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
Jan27° / 19°30321.913.24.5
Feb28° / 19°2041712.85.0
Mar27° / 19°2162112.24.8
Apr25° / 17°10114.411.56.0
May23° / 15°6611.4116.6
Jun22° / 13°366.510.77.3
Jul22° / 13°366.710.87.4
Aug23° / 13°407.211.27.4
Sep24° / 15°9311.711.96.7
Oct25° / 17°14516.312.55.7
Nov25° / 18°25121.313.14.7
Dec26° / 19°31623.713.34.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 32% 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 57%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15842
25842
35842
45743
55644
65545
75446
85347
95248
105149
114951
124852
134654
144555
154456
164357
174060
183961
193862
203763
213565
223466
233367
243367
253268
263268
273169
283169
293169
303070

Chance of precipitation in September

Any precipitation

São José do Vale do Rio Preto gets around 93 mm of rain over 11.7 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 39% and peaks near 51% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
127
228
328
429
529
630
731
832
933
1034
1135
1235
1336
1437
1538
1639
1740
1841
1942
2043
2144
2244
2345
2446
2547
2648
2749
2849
2950
3051

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels comfortable — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the comfortable band about 46% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
13349171
23249181
33249181
43150191
53150191
63050201
72950211
82850221
92749231
102649241
112549251
122449261
132348282
142248292
152148302
162047312
171947313
181946323
191845334
201845344
211744345
221743346
231643356
241642357
251641358
261541359
2715403610
2814393610
2914383711
3013383712

Wind in September

Winds average 7 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 6 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
16calm
26calm
36calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
306calm

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 7:05 AM to 6:36 AM, and sunset from 6:38 PM to 6:46 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.67:056:38
211.67:046:38
311.67:036:39
411.67:026:39
511.67:016:39
611.77:006:39
711.76:596:40
811.76:586:40
911.76:576:40
1011.76:566:41
1111.86:556:41
1211.86:546:41
1311.86:536:41
1411.86:526:42
1511.96:516:42
1611.96:506:42
1711.96:496:43
1811.96:486:43
1911.96:476:43
2012.06:466:43
2112.06:456:44
2212.06:446:44
2312.06:436:44
2412.06:426:45
2512.16:416:45
2612.16:406:45
2712.16:396:45
2812.16:386:46
2912.26:376:46
3012.26:366:46

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.63 kWh/m².

For context, solar energy here swings from a low near 3.42 kWh/m² to a high of 5.91 kWh/m² in February across the year — September's 4.63 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.6Bright
24.7Bright
34.7Bright
44.7Bright
54.7Bright
64.7Bright
74.7Bright
84.7Bright
94.7Bright
104.7Bright
114.7Bright
124.7Bright
134.7Bright
144.6Bright
154.6Bright
164.6Bright
174.6Bright
184.6Bright
194.6Bright
204.6Bright
214.6Bright
224.6Bright
234.6Bright
244.6Bright
254.6Bright
264.6Bright
274.6Bright
284.6Bright
294.6Bright
304.7Bright
Planning a trip in September

Hazard calendar for São José do Vale do Rio Preto

In seasonPeak

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

São José do Vale do Rio Preto's rainy season runs October–March, 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 São José do Vale do Rio Preto?

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

6.7
Sightseeing
4th-best month of the year
5.6
Beach & pool
2nd-best month of the year

September is a reasonable time to visit São José do Vale do Rio Preto for sightseeing.

What to pack for São José do Vale do Rio Preto in September

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

In September, São José do Vale do Rio Preto sees daytime highs around 24°C and nights near 15°C. Worth packing: light clothes, rain gear and sun protection. About 12 days see rain.

light clothesrain gearsun protection

UV index in São José do Vale do Rio Preto 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 São José do Vale do Rio Preto peaks around January 24 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 24UV 15Jul 10UV 6
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar13Extreme
Apr10Very high
May7High
Jun6High
Jul6High
Aug8Very high
Sep8Very high
Oct12Extreme
Nov14Extreme
Dec14Extreme

Air quality in São José do Vale do Rio Preto 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 São José do Vale do Rio Preto is worst in September — around 19 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (March, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1518 µg/m³Mar 1110 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb11Good
Mar10Good
Apr12Good
May15Moderate
Jun16Moderate
Jul15Moderate
Aug15Moderate
Sep19Moderate
Oct13Moderate
Nov11Good
Dec10Good
Location & terrain

Where is São José do Vale do Rio Preto?

São José do Vale do Rio Preto sits at 22.2°S, 42.9°W, 582 m above sea level, in Brazil. The nearest listed city is Sapucaia, 17 km away.

Topography around São José do Vale do Rio Preto

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of São José do Vale do Rio Preto.

Within 3 km, the terrain around São José do Vale do Rio Preto has significant variations in elevation — a maximum elevation change of 514 m around an average of 705 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,467 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,224 m.

The land around São José do Vale do Rio Preto is covered by trees (68%) and grassland (28%) within 3 km, trees (62%) and grassland (36%) within 16 km, and trees (51%) and grassland (44%) within 80 km.

3 km
514 m
16 km
1,467 m
80 km
2,224 m
treesgrasslandartificial surfaceswater
September weather nearby: Sapucaia 17 km · Sumidouro 28 km · Três Rios 30 km · Teresópolis 30 km · São Pedro 30 km · Além Paraíba 37 km · Paraíba do Sul 38 km · Carmo 41 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 São José do Vale do Rio Preto (-22.1521°, -42.9233°, elevation 582 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).