Rolim de Moura weather in December

In December, Rolim de Moura sees average daytime highs of 30°C and overnight lows near 22°C, with 223 mm of rain across 25.1 wet days and about 12.7 hours of daylight. It is the 7th-warmest and 3rd-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 4% of the time in December, and the air most often feels oppressive.

Daylight stretches from about 12 h 36 min at the start of December to 12 h 42 min by month's end. Set against the rest of the year, December is Rolim de Moura's 9th-clearest and 6th-windiest month. For the whole year in context, see Rolim de Moura's year-round climate.

Daytime high
30°
7th warmest
Overnight low
22°
10th coldest
Rainfall
223 mm
25.1 wet days
Daylight
12 h 42 min
5:43 AM – 6:24 PM
Cloud cover
84%
9th clearest
Wind
6 km/h
6th windiest
Solar energy
5.04 kWh/m²
Travel score
3.1
out of 10

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 Rolim de Moura reaches about 30°C in the afternoon and slips back to 22°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 32°C. Set against its neighbours, December runs about 1°C cooler than November and on par with January.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13023
23023
33023
43023
53023
63023
73023
83023
93023
103023
113023
123023
133022
143022
153022
163022
173022
183022
193022
203022
213022
223022
233022
243022
253022
263022
273022
283022
293022
303022
313022

How December really feels in Rolim de Moura

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.

Rolim de Moura weather by month

How December compares with the rest of the year at a glance. December is the 7th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 22°25227.612.63.0
Feb29° / 22°25025.512.43.0
Mar30° / 22°21326.512.13.1
Apr30° / 22°11519.411.73.8
May30° / 21°491011.55.1
Jun31° / 20°92.311.35.6
Jul32° / 20°61.611.45.3
Aug33° / 21°163.111.64.2
Sep33° / 22°5410.111.93.3
Oct33° / 23°10317.112.33.0
Nov31° / 23°17021.712.53.1
Dec30° / 22°22325.112.73.1

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 4% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 8% of December, with mostly cloudy or overcast conditions the remaining 88%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11189
21189
31189
41288
51288
61288
71288
81288
91288
101288
111288
121387
131486
141486
151387
161387
171486
181486
191486
201486
211486
221387
231288
241288
251189
261189
271189
281090
291090
301090
31991

Chance of precipitation in December

Any precipitation

Rolim de Moura gets around 223 mm of rain over 25.1 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 82% and peaks near 86% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%100%151015202531
Rain chance (%)
178
278
378
479
579
679
780
880
980
1081
1181
1281
1382
1482
1582
1682
1782
1882
1982
2082
2182
2282
2382
2483
2583
2683
2784
2884
2985
3085
3186

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 97% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
101972
201972
301972
401972
501972
601972
701972
801972
901972
1001972
1111962
1211962
1311962
1411962
1511962
1611962
1711962
1811962
1911962
2011962
2101972
2201972
2301972
2401972
2501972
2601972
2701972
2800982
2900982
3000982
3100982

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 6 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
96calm
106calm
116calm
126calm
136calm
146calm
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 12 h 36 min at the start of December to 12 h 42 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 5:38 AM to 5:50 AM, and sunset from 6:16 PM to 6:31 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.65:386:16
212.65:386:17
312.75:386:17
412.75:386:18
512.75:396:18
612.75:396:19
712.75:396:19
812.75:406:20
912.75:406:20
1012.75:406:21
1112.75:416:21
1212.75:416:22
1312.75:416:23
1412.75:426:23
1512.75:426:24
1612.75:436:24
1712.75:436:25
1812.75:446:25
1912.75:446:26
2012.75:446:26
2112.75:456:27
2212.75:456:27
2312.75:466:27
2412.75:466:28
2512.75:476:28
2612.75:476:29
2712.75:486:29
2812.75:486:30
2912.75:496:30
3012.75:496:30
3112.75:506:31

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.04 kWh/m².

For context, solar energy here swings from a low near 4.57 kWh/m² to a high of 5.88 kWh/m² in October across the year — December's 5.04 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.1Bright
25.1Bright
35.1Bright
45.1Bright
55.1Bright
65.1Bright
75.1Bright
85.1Bright
95.1Bright
105.1Bright
115.1Bright
125.1Bright
135.1Bright
145.1Bright
155.1Bright
165.1Bright
175.1Bright
185.1Bright
195.1Bright
205.1Bright
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 Rolim de Moura

In seasonPeak

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

Rolim de Moura's monsoon runs November–April, 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 Rolim de Moura?

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

3.1
Sightseeing
7th-best month of the year
4.3
Beach & pool
9th-best month of the year

December is a weaker month for outdoor sightseeing in Rolim de Moura.

What to pack for Rolim de Moura in December

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

In December, Rolim de Moura sees daytime highs around 30°C and nights near 22°C. Pack light clothes and rain gear. Worth having: sun protection. About 25 days see rain.

light clothesrain gearsun protection

UV index in Rolim de Moura 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 Rolim de Moura peaks around January 23 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near September 15 at about 4 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateExtremeJan 23UV 16Sep 15UV 4
UV index (midday)Level
Jan16Extreme
Feb15Extreme
Mar15Extreme
Apr13Extreme
May10Very high
Jun9Very high
Jul8Very high
Aug9Very high
Sep3Moderate
Oct11Extreme
Nov14Extreme
Dec14Extreme

Air quality in Rolim de Moura 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 Rolim de Moura is worst in September — around 54 µg/m³ PM2.5 (poor), about 6.7× the cleanest month (June, 8 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecGoodModeratePoorModerateSep 1550 µg/m³Jun 238 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb11Good
Mar12Good
Apr9Good
May8Good
Jun8Good
Jul8Good
Aug29Moderate
Sep54Poor
Oct22Moderate
Nov15Moderate
Dec13Moderate
Location & terrain

Where is Rolim de Moura?

Rolim de Moura sits at 11.8°S, 61.8°W, 254 m above sea level, in Brazil. The nearest listed city is Alta Floresta d'Oeste, 25 km away.

Topography around Rolim de Moura

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

Within 3 km, the terrain around Rolim de Moura has only modest variations in elevation — a maximum elevation change of 84 m around an average of 263 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 254 m; within 80 km, significant variations in elevation — a maximum elevation change of 422 m.

The land around Rolim de Moura is covered by grassland (79%) and trees (21%) within 3 km, grassland (74%) and trees (22%) within 16 km, and grassland (65%) and trees (34%) within 80 km.

3 km
84 m
16 km
254 m
80 km
422 m
treesgrasslandcroplandartificial surfaces
December weather nearby: Alta Floresta d'Oeste 25 km · Cacoal 56 km · Pimenta Bueno 68 km · Presidente Médici 71 km · Espigão dOeste 92 km · São Miguel do Guaporé 100 km · Ji Paraná 103 km · Ouro Preto do Oeste 126 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 Rolim de Moura (-11.8036°, -61.8033°, elevation 254 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).