Alto Alegre weather in December

In December, Alto Alegre sees average daytime highs of 32°C and overnight lows near 24°C, with 98 mm of rain across 13.5 wet days and about 11.8 hours of daylight. It is the 7th-warmest and 9th-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 14% of the time in December, and the air most often feels oppressive.

Daylight stretches from about 11 h 48 min at the start of December to 11 h 48 min by month's end. Set against the rest of the year, December is Alto Alegre's 6th-clearest and 4th-windiest month. For the whole year in context, see Alto Alegre's year-round climate.

Daytime high
32°
7th warmest
Overnight low
24°
8th coldest
Rainfall
98 mm
13.5 wet days
Daylight
11 h 48 min
6:07 AM – 5:57 PM
Cloud cover
68%
6th clearest
Wind
7 km/h
4th windiest
Solar energy
5.06 kWh/m²
Travel score
3.8
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 32°C through the month.

A typical December day in Alto Alegre reaches about 32°C in the afternoon and slips back to 24°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 33°C. Set against its neighbours, December runs on par with November and on par with January.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13224
23224
33224
43224
53224
63224
73224
83224
93224
103224
113224
123224
133224
143224
153224
163224
173224
183124
193124
203124
213124
223124
233124
243124
253124
263124
273124
283124
293124
303124
313124

How December really feels in Alto Alegre

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.

Alto Alegre weather by month

How December compares with the rest of the year at a glance. December is the 7th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 24°588.611.94.0
Feb33° / 24°517.511.93.7
Mar33° / 24°8410123.4
Apr32° / 24°24019.112.13.1
May30° / 23°40627.512.13.0
Jun29° / 22°3722812.23.1
Jul29° / 22°30028.712.23.1
Aug30° / 23°20125.312.13.2
Sep32° / 23°11818.3123.4
Oct32° / 23°1041511.93.4
Nov32° / 23°12816.611.93.3
Dec32° / 24°9813.511.83.8

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 14% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 24% of December, with mostly cloudy or overcast conditions the remaining 62%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14060
23862
33862
43862
53862
63664
73763
83763
93763
103664
113664
123763
133763
143763
153763
163862
173763
183763
193862
203961
213961
223961
233961
243961
253961
263961
273961
283961
294060
304060
314060

Chance of precipitation in December

Any precipitation

Alto Alegre gets around 98 mm of rain over 13.5 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 44% and peaks near 49% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
149
248
348
447
547
646
746
846
946
1045
1145
1245
1345
1446
1545
1645
1745
1845
1945
2044
2144
2243
2343
2442
2541
2640
2739
2838
2937
3036
3135

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the oppressive band about 68% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
11127413
21137412
31137412
41147411
51157410
61167310
7117739
8118729
9119728
10120718
11120718
12121717
13122707
14122707
15123697
16124696
17125686
18126676
19126685
20127675
21128665
22129655
23130654
24131644
25132634
26133633
27134623
28234613
29235612
30236602
31237592

Wind in December

Winds average 7 km/h in December.

Across December, daily wind ranges from about 6 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
298calm
308calm
318calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 11 h 48 min at the start of December to 11 h 48 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 6:00 AM to 6:14 AM, and sunset from 5:51 PM to 6:04 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.86:005:51
211.86:015:51
311.86:015:52
411.86:025:52
511.86:025:53
611.86:035:53
711.86:035:53
811.86:035:54
911.86:045:54
1011.86:045:55
1111.86:055:55
1211.86:055:55
1311.86:065:56
1411.86:065:56
1511.86:075:57
1611.86:075:57
1711.86:085:58
1811.86:085:58
1911.86:095:59
2011.86:095:59
2111.86:105:59
2211.86:106:00
2311.86:106:00
2411.86:116:01
2511.86:116:01
2611.86:126:02
2711.86:126:02
2811.86:136:03
2911.86:136:03
3011.86:146:04
3111.86:146:04

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.06 kWh/m².

For context, solar energy here swings from a low near 3.75 kWh/m² to a high of 5.73 kWh/m² in March across the year — December's 5.06 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.2Bright
45.2Bright
55.2Bright
65.2Bright
75.2Bright
85.2Bright
95.2Bright
105.1Bright
115.1Bright
125.1Bright
135.1Bright
145.1Bright
155.0Bright
165.0Bright
175.0Bright
185.0Bright
195.0Bright
205.0Bright
215.0Bright
225.0Bright
235.0Bright
245.0Bright
255.0Bright
265.0Bright
275.0Bright
285.0Bright
295.0Bright
305.0Bright
315.0Bright
Planning a trip in December

Hazard calendar for Alto Alegre

In seasonPeak

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

Alto Alegre's monsoon runs April–August, 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 Alto Alegre?

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

3.8
Sightseeing
2nd-best month of the year
5.8
Beach & pool
4th-best month of the year

December is a weaker month for outdoor sightseeing in Alto Alegre.

What to pack for Alto Alegre in December

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

In December, Alto Alegre sees daytime highs around 32°C and nights near 24°C. Pack light clothes. Worth having: rain gear and sun protection. About 14 days see rain.

light clothesrain gearsun protection

UV index in Alto Alegre in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Alto Alegre peaks around March 21 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 18 at about 11 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 21UV 14Nov 18UV 11
UV index (midday)Level
Jan13Extreme
Feb13Extreme
Mar14Extreme
Apr14Extreme
May13Extreme
Jun12Extreme
Jul11Extreme
Aug12Extreme
Sep12Extreme
Oct12Extreme
Nov11Extreme
Dec11Extreme

Air quality in Alto Alegre 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 Alto Alegre is worst in March — around 24 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (December, 12 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 2124 µg/m³Dec 1112 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb18Moderate
Mar24Moderate
Apr22Moderate
May16Moderate
Jun14Moderate
Jul13Moderate
Aug12Moderate
Sep12Moderate
Oct13Moderate
Nov12Moderate
Dec12Moderate
Location & terrain

Where is Alto Alegre?

Alto Alegre sits at 2.9°N, 61.5°W, 83 m above sea level, in Brazil. The nearest listed city is Mucajaí, 83 km away.

Rorainópolis

Topography around Alto Alegre

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

Within 3 km, the terrain around Alto Alegre has only modest variations in elevation — a maximum elevation change of 61 m around an average of 93 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 147 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,411 m.

The land around Alto Alegre is covered by trees (70%) and grassland (22%) within 3 km, trees (69%) and grassland (29%) within 16 km, and trees (68%) and grassland (30%) within 80 km.

3 km
61 m
16 km
147 m
80 km
1,411 m
treesshrubsgrasslandcroplandwaterwetland
December weather nearby: Mucajaí 83 km · Boa Vista 92 km · Cantá 105 km · Caracaraí 127 km · Pacaraima 175 km · Santa Elena de Uairén 195 km · Lethem 196 km · Rorainópolis 248 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 Alto Alegre (2.8958°, -61.4975°, elevation 83 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).