Cassilândia weather in September

In September, Cassilândia sees average daytime highs of 32°C and overnight lows near 20°C, with 60 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 32°C through the month. The sky is clear or mostly clear about 52% 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 Cassilândia's 4th-clearest and 2nd-windiest month. For the whole year in context, see Cassilândia's year-round climate.

Daytime high
32°
1st warmest
Overnight low
20°
5th coldest
Rainfall
60 mm
7.7 wet days
Daylight
11 h 54 min
6:24 AM – 6:18 PM
Cloud cover
43%
4th clearest
Wind
9 km/h
2nd windiest
Solar energy
5.78 kWh/m²
Travel score
4.5
out of 10

Cassilândia 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 32°C through the month.

A typical September day in Cassilândia reaches about 32°C in the afternoon and slips back to 20°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 36°C. Set against its neighbours, September runs about 2°C warmer than August and on par with October.

15°20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13119
23119
33219
43219
53219
63219
73219
83219
93219
103219
113219
123220
133220
143220
153220
163220
173220
183220
193220
203220
213220
223220
233220
243220
253220
263220
273220
283220
293220
303220

How September really feels in Cassilândia

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

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Cassilândia 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
Jan30° / 21°26424.6133.2
Feb30° / 21°21521.712.63.2
Mar30° / 21°20022.112.13.6
Apr30° / 20°7811.111.65.1
May28° / 17°385.311.17.1
Jun28° / 16°122.110.97.9
Jul28° / 16°101.5117.7
Aug30° / 17°172.411.46.2
Sep32° / 20°607.711.94.5
Oct32° / 21°12516.412.43.6
Nov31° / 21°18820.112.93.4
Dec30° / 21°23724.513.13.2

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 15% 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 (%)
17822
27822
37723
47723
57624
67624
77525
87426
97426
107327
117228
127129
137030
147030
156931
166832
176733
186634
196535
206535
216337
226238
236139
245941
255842
265644
275545
285446
295248
305248

Chance of precipitation in September

Any precipitation

Cassilândia gets around 60 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 44% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
114
214
315
415
516
617
717
818
918
1019
1120
1221
1321
1422
1523
1624
1725
1826
1928
2029
2130
2232
2333
2435
2537
2638
2740
2841
2942
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 36% of days. Sticky, muggy-or-worse air turns up on roughly 21% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
156211760
256211760
354211870
453211880
551211990
651211990
7492120100
8482120110
9462121120
10442222130
11422222130
12412323140
13392323150
14372323160
15362324170
16342324180
17332325190
18312325200
19302325220
20282325231
21272325241
22262225261
23242225282
24232124302
25222024322
26212023343
27201923363
28191823373
29181722394
30171722414

Wind in September

Winds average 9 km/h in September.

Across September, daily wind ranges from about 8 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
248calm
258calm
268calm
278calm
288calm
298calm
308calm

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 6:38 AM to 6:12 AM, and sunset from 6:15 PM to 6:21 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.66:386:15
211.66:376:15
311.76:366:16
411.76:356:16
511.76:356:16
611.76:346:16
711.76:336:16
811.76:326:17
911.86:316:17
1011.86:306:17
1111.86:296:17
1211.86:286:17
1311.86:276:17
1411.96:266:18
1511.96:256:18
1611.96:246:18
1711.96:246:18
1811.96:236:18
1911.96:226:19
2012.06:216:19
2112.06:206:19
2212.06:196:19
2312.06:186:19
2412.06:176:20
2512.16:166:20
2612.16:156:20
2712.16:146:20
2812.16:136:20
2912.16:136:21
3012.26:126:21

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.78 kWh/m².

For context, solar energy here swings from a low near 4.11 kWh/m² to a high of 6.1 kWh/m² in October across the year — September's 5.78 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.5Bright
25.6Bright
35.6Bright
45.6Bright
55.6Bright
65.6Bright
75.6Bright
85.7Bright
95.7Bright
105.7Bright
115.7Bright
125.7Bright
135.7Bright
145.8Bright
155.8Bright
165.8Bright
175.8Bright
185.8Bright
195.8Bright
205.8Bright
215.9Bright
225.9Bright
235.9Bright
245.9Bright
255.9Bright
265.9Bright
275.9Bright
286.0Bright
296.0Bright
306.0Bright
Planning a trip in September

Hazard calendar for Cassilândia

In seasonPeak

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

Cassilândia'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 Cassilândia?

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

4.5
Sightseeing
6th-best month of the year
7.0
Beach & pool
5th-best month of the year

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

What to pack for Cassilândia in September

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

In September, Cassilândia sees daytime highs around 32°C and nights near 20°C. Pack light clothes. Worth having: sun protection. About 8 days see rain.

light clothessun protection

UV index in Cassilândia 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 Cassilândia peaks around January 24 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 21 at about 7 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeJan 24UV 15Jun 21UV 7
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar14Extreme
Apr11Extreme
May8Very high
Jun7High
Jul7Very high
Aug9Very high
Sep9Very high
Oct10Extreme
Nov13Extreme
Dec14Extreme

Air quality in Cassilândia 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 Cassilândia is worst in September — around 18 µg/m³ PM2.5 (moderate), about 4.8× the cleanest month (July, 4 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1817 µg/m³Jul 114 µg/m³
PM2.5 (µg/m³)Level
Jan6Good
Feb7Good
Mar6Good
Apr5Good
May6Good
Jun4Good
Jul4Good
Aug7Good
Sep18Moderate
Oct11Good
Nov5Good
Dec6Good
Location & terrain

Where is Cassilândia?

Cassilândia sits at 19.1°S, 51.7°W, 475 m above sea level, in Brazil. The nearest listed city is Paranaíba, 85 km away.

Topography around Cassilândia

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

Within 3 km, the terrain around Cassilândia has only modest variations in elevation — a maximum elevation change of 172 m around an average of 484 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 370 m; within 80 km, significant variations in elevation — a maximum elevation change of 492 m.

The land around Cassilândia is covered by grassland (42%) and trees (25%) within 3 km, grassland (48%) and trees (31%) within 16 km, and grassland (44%), cropland (31%) and trees (22%) within 80 km.

3 km
172 m
16 km
370 m
80 km
492 m
treesshrubsgrasslandcroplandartificial surfaceswater
September weather nearby: Paranaíba 85 km · Chapadão do Sul 100 km · São Simão 126 km · Aparecida do Taboado 127 km · Jataí 137 km · Santa Fé do Sul 149 km · Ilha Solteira 152 km · Quirinópolis 154 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 Cassilândia (-19.1133°, -51.7342°, elevation 475 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).