Cassilândia weather in December

In December, Cassilândia sees average daytime highs of 30°C and overnight lows near 21°C, with 237 mm of rain across 24.5 wet days and about 13.1 hours of daylight. It is the 5th-warmest and 2nd-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 10% of the time in December, and the air most often feels muggy.

Daylight stretches from about 13 h 06 min at the start of December to 13 h 06 min by month's end. Set against the rest of the year, December is Cassilândia's 11th-clearest and 8th-windiest month. For the whole year in context, see Cassilândia's year-round climate.

Daytime high
30°
5th warmest
Overnight low
21°
11th coldest
Rainfall
237 mm
24.5 wet days
Daylight
13 h 06 min
5:49 AM – 6:57 PM
Cloud cover
77%
11th clearest
Wind
7 km/h
8th windiest
Solar energy
5.82 kWh/m²
Travel score
3.2
out of 10

Cassilândia is human settlement in Brazil.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 30°C through the month.

A typical December day in Cassilândia reaches about 30°C in the afternoon and slips back to 21°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 33°C. Set against its neighbours, December runs on par with November and on par with January.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13021
23021
33021
43021
53021
63021
73021
83021
93021
103021
113021
123021
133021
143021
153021
163021
173021
183021
193021
203021
213021
223021
233021
243021
253021
263021
273021
283021
293021
303021
313021

How December really feels in Cassilândia

Once humidity and wind are folded in, December averages 31 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
31
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

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

Cassilândia weather by month

How December compares with the rest of the year at a glance. December is the 5th-warmest and 2nd-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 December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 10% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 13% of December, with mostly cloudy or overcast conditions the remaining 77%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12575
22476
32278
42278
52179
62080
72080
82080
91981
102179
112179
122179
132278
142377
152476
162476
172575
182575
192674
202773
212773
222674
232674
242674
252575
262575
272476
282476
292278
302278
312179

Chance of precipitation in December

Any precipitation

Cassilândia gets around 237 mm of rain over 24.5 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 79% and peaks near 80% on the wettest days.

0%20%40%60%80%151015202531
Rain chance (%)
177
278
379
479
579
680
779
879
979
1079
1179
1279
1379
1479
1579
1679
1779
1879
1979
2079
2179
2279
2379
2479
2579
2679
2779
2879
2979
3079
3179

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the muggy band about 50% of days. Sticky, muggy-or-worse air turns up on roughly 96% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1365239
2365041
3355042
4245143
5244944
6234945
7234945
8234946
9134946
10134946
11135046
12135046
13135145
14135145
15135145
16135145
17035344
18035344
19035344
20035344
21025444
22025345
23025345
24025246
25025147
26025048
27024948
28024849
29024751
30024652
31024652

Wind in December

Winds average 7 km/h in December.

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

0246810151015202531
Wind speed (km/h)Feels
17calm
27calm
37calm
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
307calm
317calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 13 h 06 min at the start of December to 13 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 0 minutes over December. Sunrise moves from 5:45 AM to 5:56 AM, and sunset from 6:49 PM to 7:04 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.15:456:49
213.15:456:49
313.15:456:50
413.15:456:51
513.15:456:51
613.15:466:52
713.15:466:52
813.15:466:53
913.15:466:54
1013.15:476:54
1113.15:476:55
1213.15:476:55
1313.15:486:56
1413.15:486:56
1513.15:486:57
1613.15:496:57
1713.15:496:58
1813.15:506:59
1913.25:506:59
2013.25:507:00
2113.25:517:00
2213.25:517:00
2313.25:527:01
2413.25:527:01
2513.25:537:02
2613.15:537:02
2713.15:547:03
2813.15:547:03
2913.15:557:03
3013.15:557:04
3113.15:567:04

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.82 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 — December's 5.82 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.8Bright
25.8Bright
35.8Bright
45.8Bright
55.8Bright
65.8Bright
75.7Bright
85.7Bright
95.7Bright
105.7Bright
115.7Bright
125.7Bright
135.7Bright
145.7Bright
155.8Bright
165.8Bright
175.8Bright
185.8Bright
195.8Bright
205.8Bright
215.9Bright
225.9Bright
235.9Bright
245.9Bright
255.9Bright
265.9Bright
275.8Bright
285.8Bright
295.8Bright
305.8Bright
315.8Bright
Planning a trip in December

Hazard calendar for Cassilândia

In seasonPeak

In December, Cassilândia sits inside its monsoon season. The full year is below, with each hazard's peak months called out.

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 December a good time to visit Cassilândia?

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

3.2
Sightseeing
10th-best month of the year
4.5
Beach & pool
11th-best month of the year

December is a weaker month for outdoor sightseeing in Cassilândia.

What to pack for Cassilândia in December

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

In December, Cassilândia sees daytime highs around 30°C and nights near 21°C. Pack light clothes and rain gear. Worth having: sun protection. About 25 days see rain.

light clothesrain gearsun protection

UV index in Cassilândia in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 14 (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 December

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where December 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
December 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).