Monte Sião weather in December

In December, Monte Sião sees average daytime highs of 27°C and overnight lows near 19°C, with 199 mm of rain across 20.7 wet days and about 13.3 hours of daylight. It is the 3rd-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 16% of the time in December, and the air most often feels humid.

Daylight stretches from about 13 h 18 min at the start of December to 13 h 24 min by month's end. Set against the rest of the year, December is Monte Sião's 11th-clearest and 7th-windiest month. For the whole year in context, see Monte Sião's year-round climate.

Daytime high
27°
3rd warmest
Overnight low
19°
10th coldest
Rainfall
199 mm
20.7 wet days
Daylight
13 h 24 min
6:21 AM – 7:43 PM
Cloud cover
70%
11th clearest
Wind
8 km/h
7th windiest
Solar energy
5.67 kWh/m²
Travel score
4.8
out of 10

Monte Sião 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 27°C through the month.

A typical December day in Monte Sião reaches about 27°C in the afternoon and slips back to 19°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 30°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)
12718
22718
32718
42718
52718
62718
72718
82719
92719
102719
112719
122719
132719
142719
152719
162719
172719
182719
192719
202719
212719
222719
232719
242719
252719
262719
272719
282719
292719
302719
312719

Monte Sião weather by month

How December compares with the rest of the year at a glance. December is the 3rd-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 19°23522.513.24.5
Feb28° / 19°16918.812.84.8
Mar27° / 18°12918.112.25.3
Apr26° / 16°619.111.57.0
May23° / 14°536.110.97.7
Jun23° / 13°354.110.78.1
Jul23° / 12°313.410.88.4
Aug25° / 13°263.811.28.4
Sep27° / 15°758.511.97.1
Oct27° / 17°10413.412.56.0
Nov27° / 18°14416.813.15.4
Dec27° / 19°19920.713.34.8

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 16% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 17% of December, with mostly cloudy or overcast conditions the remaining 68%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13862
23763
33664
43565
53466
63466
73367
83367
93367
103169
113268
123268
133169
143169
153169
163169
173169
183367
193268
203367
213268
223367
233367
243367
253268
263268
273169
283070
293070
302971
312971

Chance of precipitation in December

Any precipitation

Monte Sião gets around 199 mm of rain over 20.7 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 67% and peaks near 72% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
159
260
360
461
562
662
763
864
964
1065
1166
1266
1367
1467
1568
1668
1769
1869
1969
2069
2169
2270
2370
2470
2571
2671
2771
2872
2972
3072
3172

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the humid band about 48% of days. Sticky, muggy-or-worse air turns up on roughly 39% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
13224927
22214829
32194831
42184832
52174734
61164735
71164736
81154738
91144638
101144639
111134640
120134740
130134740
140124740
150124740
160124840
170114840
180114840
190114940
200104940
210105041
22095041
23095041
24085042
25085042
26074943
27074944
28074845
29064845
30064746
31064747

Wind in December

Winds average 8 km/h in December.

Across December, 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.

051015151015202531
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
318calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 13 h 18 min at the start of December to 13 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over December. Sunrise moves from 6:18 AM to 6:29 AM, and sunset from 7:34 PM to 7:50 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.36:187:34
213.36:187:35
313.36:187:36
413.36:187:36
513.36:187:37
613.36:197:38
713.36:197:38
813.36:197:39
913.36:197:39
1013.36:197:40
1113.36:207:41
1213.46:207:41
1313.46:207:42
1413.46:217:42
1513.46:217:43
1613.46:217:43
1713.46:227:44
1813.46:227:45
1913.46:237:45
2013.46:237:46
2113.46:247:46
2213.46:247:47
2313.46:247:47
2413.46:257:47
2513.46:257:48
2613.46:267:48
2713.46:277:49
2813.46:277:49
2913.46:287:49
3013.46:287:50
3113.46:297:50

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.67 kWh/m².

For context, solar energy here swings from a low near 3.74 kWh/m² to a high of 5.78 kWh/m² in November across the year — December's 5.67 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.8Bright
25.8Bright
35.8Bright
45.7Bright
55.7Bright
65.7Bright
75.7Bright
85.7Bright
95.7Bright
105.7Bright
115.7Bright
125.6Bright
135.6Bright
145.6Bright
155.6Bright
165.6Bright
175.6Bright
185.7Bright
195.7Bright
205.7Bright
215.6Bright
225.6Bright
235.6Bright
245.6Bright
255.6Bright
265.6Bright
275.6Bright
285.5Bright
295.5Bright
305.5Bright
315.5Bright
Planning a trip in December

Hazard calendar for Monte Sião

In seasonPeak

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

Monte Sião's rainy season runs November–March, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is December a good time to visit Monte Sião?

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

4.8
Sightseeing
10th-best month of the year
4.9
Beach & pool
11th-best month of the year

December is a reasonable time to visit Monte Sião for sightseeing.

What to pack for Monte Sião in December

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

In December, Monte Sião sees daytime highs around 27°C and nights near 19°C. Pack light clothes and rain gear. Worth having: sun protection. About 21 days see rain.

light clothesrain gearsun protection

UV index in Monte Sião 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 Monte Sião peaks around January 24 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 10 at about 6 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeJan 24UV 15Jul 10UV 6
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar13Extreme
Apr10Very high
May7Very high
Jun6High
Jul6High
Aug8Very high
Sep9Very high
Oct12Extreme
Nov14Extreme
Dec14Extreme

Air quality in Monte Sião 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 Monte Sião is worst in September — around 27 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (December, 15 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateSep 1227 µg/m³Dec 1515 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb16Moderate
Mar18Moderate
Apr21Moderate
May24Moderate
Jun25Moderate
Jul26Moderate
Aug25Moderate
Sep27Moderate
Oct20Moderate
Nov15Moderate
Dec15Moderate
Location & terrain

Where is Monte Sião?

Monte Sião sits at 22.4°S, 46.6°W, 857 m above sea level, in Brazil. The nearest listed city is Águas de Lindóia, 8.0 km away.

Topography around Monte Sião

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

Within 3 km, the terrain around Monte Sião has significant variations in elevation — a maximum elevation change of 454 m around an average of 904 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 685 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,494 m.

The land around Monte Sião is covered by grassland (53%) and trees (30%) within 3 km, grassland (52%) and trees (36%) within 16 km, and grassland (40%) and trees (36%) within 80 km.

3 km
454 m
16 km
685 m
80 km
1,494 m
treesgrasslandcroplandartificial surfaces
December weather nearby: Águas de Lindóia 8.0 km · Jacutinga 17 km · Socorro 18 km · Serra Negra 24 km · Itapira 26 km · Ouro Fino 27 km · Espírito Santo do Pinhal 32 km · Amparo 36 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 Monte Sião (-22.4325°, -46.5725°, elevation 857 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).