Cássia weather in December

In December, Cássia sees average daytime highs of 28°C and overnight lows near 20°C, with 206 mm of rain across 23.1 wet days and about 13.2 hours of daylight. It is the 7th-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 11% of the time in December, and the air most often feels muggy.

Daylight stretches from about 13 h 12 min at the start of December to 13 h 12 min by month's end. Set against the rest of the year, December is Cássia's 11th-clearest and 7th-windiest month. For the whole year in context, see Cássia's year-round climate.

Daytime high
28°
7th warmest
Overnight low
20°
10th coldest
Rainfall
206 mm
23.1 wet days
Daylight
13 h 12 min
6:27 AM – 7:41 PM
Cloud cover
75%
11th clearest
Wind
6 km/h
7th windiest
Solar energy
5.62 kWh/m²
Travel score
4.4
out of 10

Cássia 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 28°C through the month.

A typical December day in Cássia reaches about 28°C in the afternoon and slips back to 20°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 31°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)
12820
22820
32820
42820
52820
62820
72820
82820
92820
102820
112820
122820
132820
142820
152820
162820
172820
182820
192820
202820
212820
222820
232820
242820
252820
262821
272821
282821
292821
302821
312821

Cássia weather by month

How December compares with the rest of the year at a glance. December is the 7th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 21°22221.813.14.3
Feb28° / 21°15617.912.74.5
Mar28° / 20°14118.112.15.0
Apr27° / 19°518.511.56.8
May25° / 16°304.8117.8
Jun25° / 15°172.310.88.5
Jul25° / 14°101.910.98.6
Aug27° / 15°122.311.38.3
Sep28° / 18°526.711.96.7
Oct29° / 19°9112.412.55.3
Nov28° / 20°15518.2134.9
Dec28° / 20°20623.113.24.4

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 11% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 15% of December, with mostly cloudy or overcast conditions the remaining 74%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12971
22872
32773
42674
52575
62575
72575
82575
92674
102674
112674
122674
132674
142773
152773
162773
172872
182872
192872
202872
212971
222971
232872
242773
252773
262575
272575
282575
292476
302476
312377

Chance of precipitation in December

Any precipitation

Cássia gets around 206 mm of rain over 23.1 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 73% and peaks near 76% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
166
267
368
469
570
671
772
872
973
1073
1173
1274
1374
1474
1574
1674
1774
1874
1974
2074
2175
2275
2375
2476
2576
2676
2776
2876
2976
3075
3175

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 83% of days. Sticky, muggy-or-worse air turns up on roughly 84% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1324721
2223741
3222751
4220771
5219781
6218791
7117811
8116821
9116821
10115831
11115831
12115831
13015841
14015841
15014851
16014851
17014851
18014851
19014851
20014851
21014851
22014851
23014851
24013861
25013861
26013861
27012862
28012862
29012862
30011872
31011872

Wind in December

Winds average 6 km/h in December.

Across December, 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.

0246810151015202531
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 13 h 12 min at the start of December to 13 h 12 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 6:23 AM to 6:34 AM, and sunset from 7:32 PM to 7:48 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.26:237:32
213.26:237:33
313.26:237:33
413.26:237:34
513.26:237:35
613.26:247:35
713.26:247:36
813.26:247:37
913.26:247:37
1013.26:257:38
1113.26:257:38
1213.26:257:39
1313.26:257:39
1413.26:267:40
1513.26:267:41
1613.26:277:41
1713.26:277:42
1813.26:277:42
1913.26:287:43
2013.26:287:43
2113.26:297:44
2213.26:297:44
2313.26:307:45
2413.26:307:45
2513.26:317:45
2613.26:317:46
2713.26:327:46
2813.26:327:47
2913.26:337:47
3013.26:337:47
3113.26:347:48

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.62 kWh/m².

For context, solar energy here swings from a low near 4 kWh/m² to a high of 5.96 kWh/m² in October across the year — December's 5.62 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.5Bright
55.5Bright
65.5Bright
75.5Bright
85.5Bright
95.5Bright
105.5Bright
115.5Bright
125.5Bright
135.5Bright
145.6Bright
155.6Bright
165.6Bright
175.6Bright
185.7Bright
195.7Bright
205.7Bright
215.7Bright
225.7Bright
235.7Bright
245.7Bright
255.7Bright
265.6Bright
275.6Bright
285.6Bright
295.6Bright
305.5Bright
315.5Bright
Planning a trip in December

Hazard calendar for Cássia

In seasonPeak

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

Cássia's monsoon runs November–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 Cássia?

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

4.4
Sightseeing
11th-best month of the year
4.7
Beach & pool
12th-best month of the year

December is a reasonable time to visit Cássia for sightseeing.

What to pack for Cássia in December

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

In December, Cássia sees daytime highs around 28°C and nights near 20°C. Pack light clothes and rain gear. Worth having: sun protection. About 23 days see rain.

light clothesrain gearsun protection

UV index in Cássia 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 Cássia peaks around January 21 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 at about 7 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeJan 21UV 15Jun 20UV 7
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar13Extreme
Apr11Extreme
May8Very high
Jun7High
Jul7Very high
Aug9Very high
Sep10Extreme
Oct12Extreme
Nov15Extreme
Dec14Extreme

Air quality in Cássia 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 Cássia is worst in September — around 40 µg/m³ PM2.5 (poor), about 5.7× the cleanest month (November, 7 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateModerateGoodSep 1537 µg/m³Nov 227 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb9Good
Mar9Good
Apr9Good
May9Good
Jun9Good
Jul10Good
Aug18Moderate
Sep40Poor
Oct14Moderate
Nov7Good
Dec8Good
Location & terrain

Where is Cássia?

Cássia sits at 20.6°S, 46.9°W, 740 m above sea level, in Brazil. The nearest listed city is Passos, 36 km away.

Topography around Cássia

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

Within 3 km, the terrain around Cássia has only modest variations in elevation — a maximum elevation change of 231 m around an average of 770 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 624 m; within 80 km, large variations in elevation — a maximum elevation change of 966 m.

The land around Cássia is covered by grassland (44%) and trees (30%) within 3 km, grassland (42%), trees (33%) and cropland (22%) within 16 km, and trees (34%), grassland (34%) and cropland (24%) within 80 km.

3 km
231 m
16 km
624 m
80 km
966 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Passos 36 km · São Sebastião do Paraíso 38 km · Franca 50 km · Alpinópolis 64 km · Monte Santo de Minas 68 km · Altinópolis 68 km · Pedregulho 68 km · Batatais 77 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 Cássia (-20.5831°, -46.9219°, elevation 740 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).