São José dos Quatro Marcos weather in September

In September, São José dos Quatro Marcos sees average daytime highs of 34°C and overnight lows near 22°C, with 45 mm of rain across 7.7 wet days and about 11.9 hours of daylight. It is the 1st-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 34°C through the month. The sky is clear or mostly clear about 52% of the time in September, and the air most often feels muggy.

Daylight stretches from about 11 h 42 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is São José dos Quatro Marcos's 4th-clearest and 3rd-windiest month. For the whole year in context, see São José dos Quatro Marcos's year-round climate.

Daytime high
34°
1st warmest
Overnight low
22°
6th coldest
Rainfall
45 mm
7.7 wet days
Daylight
11 h 54 min
6:50 AM – 6:44 PM
Cloud cover
46%
4th clearest
Wind
8 km/h
3rd windiest
Solar energy
5.64 kWh/m²
Travel score
3.5
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 34°C through the month.

A typical September day in São José dos Quatro Marcos reaches about 34°C in the afternoon and slips back to 22°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 38°C. Set against its neighbours, September runs about 1°C warmer than August and on par with October.

15°20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13321
23321
33321
43321
53322
63422
73422
83422
93422
103422
113422
123422
133422
143422
153422
163422
173422
183423
193423
203423
213423
223423
233423
243423
253423
263423
273423
283323
293323
303323

How September really feels in São José dos Quatro Marcos

Once humidity and wind are folded in, September averages 30 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
30
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

São José dos Quatro Marcos weather by month

How September compares with the rest of the year at a glance. September is the 1st-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 23°20624.412.82.8
Feb31° / 23°20223.412.52.8
Mar31° / 23°17223.212.13.0
Apr31° / 22°9614.311.74.1
May29° / 20°447.411.35.7
Jun29° / 19°112.211.16.5
Jul30° / 18°91.611.26.4
Aug32° / 20°142.911.54.8
Sep34° / 22°457.711.93.5
Oct33° / 23°11416.412.42.9
Nov32° / 23°15819.912.72.9
Dec32° / 23°18324.312.92.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 52% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 14% 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
27723
37723
47624
57525
67525
77327
87228
97228
107129
117030
126931
136931
146733
156733
166634
176634
186535
196436
206337
216238
226139
236040
245842
255842
265644
275644
285644
295446
305446

Chance of precipitation in September

Any precipitation

São José dos Quatro Marcos gets around 45 mm of rain over 7.7 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 26% and peaks near 42% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
115
215
316
416
517
617
718
819
919
1020
1121
1222
1323
1424
1525
1625
1726
1827
1928
2030
2131
2232
2334
2435
2537
2638
2739
2840
2941
3042

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the muggy band about 38% of days. Sticky, muggy-or-worse air turns up on roughly 63% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1121828366
2121827377
3121726378
4111725389
51116253810
61116243811
71115243812
81015233913
91014233914
101013223915
11912224017
12912214018
13811214019
14810204121
15710204122
1679204124
1778194025
1868194027
1967194028
2067184030
2157173932
2256173933
2356163835
2445153838
2545153740
2645143642
2734143544
2834133446
2934133347
3033123249

Wind in September

Winds average 8 km/h in September.

Across September, daily wind ranges from about 8 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 42 min at the start of September to 12 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 24 minutes over September. Sunrise moves from 7:02 AM to 6:38 AM, and sunset from 6:43 PM to 6:46 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.77:026:43
211.77:016:43
311.77:006:43
411.76:596:43
511.86:596:44
611.86:586:44
711.86:576:44
811.86:566:44
911.86:556:44
1011.86:556:44
1111.86:546:44
1211.96:536:44
1311.96:526:44
1411.96:516:44
1511.96:506:44
1611.96:506:44
1711.96:496:45
1811.96:486:45
1912.06:476:45
2012.06:466:45
2112.06:466:45
2212.06:456:45
2312.06:446:45
2412.06:436:45
2512.06:426:45
2612.16:416:45
2712.16:416:45
2812.16:406:46
2912.16:396:46
3012.16:386:46

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.64 kWh/m².

For context, solar energy here swings from a low near 4.28 kWh/m² to a high of 5.92 kWh/m² in October across the year — September's 5.64 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
275.7Bright
285.8Bright
295.8Bright
305.8Bright
Planning a trip in September

Hazard calendar for São José dos Quatro Marcos

In seasonPeak

None of São José dos Quatro Marcos'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 dos Quatro Marcos's monsoon runs October–April, 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 São José dos Quatro Marcos?

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

3.5
Sightseeing
6th-best month of the year
6.6
Beach & pool
5th-best month of the year

September is a weaker month for outdoor sightseeing in São José dos Quatro Marcos. The water and warmth also suit a beach or pool day.

What to pack for São José dos Quatro Marcos in September

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

In September, São José dos Quatro Marcos sees daytime highs around 34°C and nights near 22°C. Pack light clothes. Worth having: sun protection. About 8 days see rain.

light clothessun protection

UV index in São José dos Quatro Marcos in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 3 — 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 dos Quatro Marcos peaks around January 22 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near September 15 at about 4 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateExtremeJan 22UV 15Sep 15UV 4
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar14Extreme
Apr12Extreme
May9Very high
Jun8Very high
Jul8Very high
Aug9Very high
Sep3Moderate
Oct11Extreme
Nov13Extreme
Dec14Extreme

Air quality in São José dos Quatro Marcos 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 dos Quatro Marcos is worst in September — around 43 µg/m³ PM2.5 (poor), about 6.0× the cleanest month (July, 7 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateModerateGoodSep 1640 µg/m³Jul 97 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb10Good
Mar9Good
Apr7Good
May8Good
Jun7Good
Jul7Good
Aug21Moderate
Sep43Poor
Oct21Moderate
Nov12Moderate
Dec11Good
Location & terrain

Where is São José dos Quatro Marcos?

São José dos Quatro Marcos sits at 15.6°S, 58.2°W, 229 m above sea level, in Brazil. The nearest listed city is Mirassol d'Oeste, 11 km away.

Topography around São José dos Quatro Marcos

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of São José dos Quatro Marcos.

Within 3 km, the terrain around São José dos Quatro Marcos has only modest variations in elevation — a maximum elevation change of 74 m around an average of 223 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 253 m; within 80 km, significant variations in elevation — a maximum elevation change of 599 m.

The land around São José dos Quatro Marcos is covered by grassland (69%) within 3 km, grassland (68%) and trees (26%) within 16 km, and grassland (56%) and trees (38%) within 80 km.

3 km
74 m
16 km
253 m
80 km
599 m
treesgrasslandcroplandartificial surfaceswetland
September weather nearby: Mirassol d'Oeste 11 km · Lambari d'Oeste 38 km · Cáceres 73 km · Barra do Bugres 123 km · Pontes e Lacerda 132 km · Nova Olímpia 132 km · Tangará da Serra 134 km · Poconé 181 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 dos Quatro Marcos (-15.6214°, -58.1764°, elevation 229 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).