Mirassol d'Oeste weather in September

In September, Mirassol d'Oeste sees average daytime highs of 34°C and overnight lows near 23°C, with 46 mm of rain across 7.2 wet days and about 11.9 hours of daylight. It is the 1st-warmest and 9th-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 53% 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 Mirassol d'Oeste's 4th-clearest and 3rd-windiest month. For the whole year in context, see Mirassol d'Oeste's year-round climate.

Daytime high
34°
1st warmest
Overnight low
23°
6th coldest
Rainfall
46 mm
7.2 wet days
Daylight
11 h 54 min
6:49 AM – 6:44 PM
Cloud cover
44%
4th clearest
Wind
8 km/h
3rd windiest
Solar energy
5.68 kWh/m²
Travel score
3.3
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 Mirassol d'Oeste reaches about 34°C in the afternoon and slips back to 23°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)
13421
23422
33422
43422
53422
63422
73422
83422
93422
103422
113422
123422
133422
143423
153423
163423
173423
183423
193423
203423
213423
223423
233423
243423
253423
263423
273423
283423
293423
303423

How September really feels in Mirassol d'Oeste

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.

Mirassol d'Oeste weather by month

How September compares with the rest of the year at a glance. September is the 1st-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 24°22324.512.82.6
Feb31° / 24°20522.712.52.7
Mar32° / 24°16322.512.12.9
Apr31° / 23°9313.111.74.0
May30° / 21°466.811.35.5
Jun30° / 19°122.111.16.3
Jul30° / 18°101.411.26.3
Aug33° / 20°142.511.54.7
Sep34° / 23°467.211.93.3
Oct34° / 24°11215.512.42.7
Nov33° / 24°17319.912.72.8
Dec32° / 24°19924.412.92.6

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 14% of September, with mostly cloudy or overcast conditions the remaining 33%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17921
27822
37723
47624
57525
67525
77327
87327
97228
107129
117030
127030
136832
146832
156832
166634
176634
186535
196436
206436
216238
226238
236040
245941
255842
265743
275644
285644
295446
305446

Chance of precipitation in September

Any precipitation

Mirassol d'Oeste gets around 46 mm of rain over 7.2 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 25% 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 (%)
113
213
314
414
515
615
716
817
917
1018
1119
1220
1321
1422
1523
1624
1725
1826
1927
2028
2129
2231
2332
2434
2535
2636
2738
2839
2940
3040

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 36% of days. Sticky, muggy-or-worse air turns up on roughly 62% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1121730337
2121729348
3111629359
41116283510
51116273511
61115263512
71015263613
81014253615
91013243616
101013243717
11912233719
12911223820
13911223821
14810213922
1589203923
1689203925
1778193926
1878193927
1977183929
2067183930
2166173932
2256163834
2356163836
2455153738
2545143640
2645143542
2744133444
2834133347
2934123249
3034123150

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.

051015151015202530
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 7:01 AM to 6:38 AM, and sunset from 6:43 PM to 6:45 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.77:016:43
211.77:016:43
311.77:006:43
411.76:596:43
511.76:586:43
611.86:576:43
711.86:576:43
811.86:566:43
911.86:556:44
1011.86:546:44
1111.86:536:44
1211.96:536:44
1311.96:526:44
1411.96:516:44
1511.96:506:44
1611.96:496:44
1711.96:486:44
1811.96:486:44
1912.06:476:44
2012.06:466:44
2112.06:456:44
2212.06:446:45
2312.06:446:45
2412.06:436:45
2512.06:426:45
2612.16:416:45
2712.16:406:45
2812.16:406:45
2912.16:396:45
3012.16:386:45

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.68 kWh/m².

For context, solar energy here swings from a low near 4.27 kWh/m² to a high of 6 kWh/m² in October across the year — September's 5.68 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.5Bright
55.6Bright
65.6Bright
75.6Bright
85.6Bright
95.6Bright
105.6Bright
115.6Bright
125.7Bright
135.7Bright
145.7Bright
155.7Bright
165.7Bright
175.7Bright
185.7Bright
195.7Bright
205.7Bright
215.8Bright
225.8Bright
235.8Bright
245.8Bright
255.8Bright
265.8Bright
275.8Bright
285.8Bright
295.8Bright
305.8Bright
Planning a trip in September

Hazard calendar for Mirassol d'Oeste

In seasonPeak

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

Mirassol d'Oeste's monsoon runs October–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 Mirassol d'Oeste?

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

3.3
Sightseeing
6th-best month of the year
6.5
Beach & pool
5th-best month of the year

September is a weaker month for outdoor sightseeing in Mirassol d'Oeste. The water and warmth also suit a beach or pool day.

What to pack for Mirassol d'Oeste in September

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

In September, Mirassol d'Oeste sees daytime highs around 34°C and nights near 23°C. Pack light clothes. Worth having: sun protection. About 7 days see rain.

light clothessun protection

UV index in Mirassol d'Oeste 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 Mirassol d'Oeste 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 Mirassol d'Oeste 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 Mirassol d'Oeste is worst in September — around 64 µg/m³ PM2.5 (unhealthy), about 10.2× the cleanest month (July, 6 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateModerateSep 1759 µg/m³Jul 106 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb10Good
Mar9Good
Apr7Good
May7Good
Jun7Good
Jul6Good
Aug21Moderate
Sep64Unhealthy
Oct26Moderate
Nov15Moderate
Dec11Good
Location & terrain

Where is Mirassol d'Oeste?

Mirassol d'Oeste sits at 15.7°S, 58.1°W, 292 m above sea level, in Brazil. The nearest listed city is São José dos Quatro Marcos, 11 km away.

Topography around Mirassol d'Oeste

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Mirassol d'Oeste.

Within 3 km, the terrain around Mirassol d'Oeste has only modest variations in elevation — a maximum elevation change of 177 m around an average of 246 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 314 m; within 80 km, large variations in elevation — a maximum elevation change of 600 m.

The land around Mirassol d'Oeste is covered by grassland (57%) and trees (22%) within 3 km, grassland (63%) and trees (29%) within 16 km, and grassland (55%) and trees (39%) within 80 km.

3 km
177 m
16 km
314 m
80 km
600 m
treesshrubsgrasslandcroplandartificial surfaceswetland
September weather nearby: São José dos Quatro Marcos 11 km · Lambari d'Oeste 40 km · Cáceres 62 km · Barra do Bugres 118 km · Nova Olímpia 130 km · Tangará da Serra 134 km · Pontes e Lacerda 143 km · Poconé 170 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 Mirassol d'Oeste (-15.6757°, -58.0902°, elevation 292 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).