Formosa do Rio Preto weather in December

In December, Formosa do Rio Preto sees average daytime highs of 30°C and overnight lows near 21°C, with 138 mm of rain across 14.5 wet days and about 12.6 hours of daylight. It is the 5th-warmest and 4th-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 19% of the time in December, and the air most often feels muggy.

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

Daytime high
30°
5th warmest
Overnight low
21°
10th coldest
Rainfall
138 mm
14.5 wet days
Daylight
12 h 36 min
5:38 AM – 6:16 PM
Cloud cover
70%
9th clearest
Wind
6 km/h
9th windiest
Solar energy
5.76 kWh/m²
Travel score
4.2
out of 10

Formosa do Rio Preto 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 Formosa do Rio Preto 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 27°C and 33°C. Set against its neighbours, December runs about 1°C cooler than 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 Formosa do Rio Preto

Once humidity and wind are folded in, December averages 3 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
3
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.

Formosa do Rio Preto weather by month

How December compares with the rest of the year at a glance. December is the 5th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 21°1681712.64.2
Feb30° / 21°13416.212.44.2
Mar30° / 21°15016.412.14.3
Apr30° / 21°729.811.85.0
May30° / 20°202.811.55.7
Jun30° / 19°00.111.46.4
Jul30° / 19°00.111.46.5
Aug32° / 19°00.111.65.6
Sep33° / 21°6111.94.2
Oct33° / 22°555.912.23.6
Nov31° / 22°13912.912.53.9
Dec30° / 21°13814.512.64.2

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 19% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 16% of December, with mostly cloudy or overcast conditions the remaining 65%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13070
23169
33169
43169
53169
63268
73268
83367
93367
103367
113466
123466
133565
143565
153565
163763
173763
183763
193763
203763
213862
223763
233763
243862
253664
263664
273763
283763
293664
303664
313664

Chance of precipitation in December

Any precipitation

Formosa do Rio Preto gets around 138 mm of rain over 14.5 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 47% and peaks near 51% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
149
249
350
450
550
651
751
851
951
1051
1150
1250
1349
1448
1547
1647
1746
1845
1944
2044
2143
2243
2343
2443
2544
2644
2745
2846
2947
3048
3149

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 66% of days. Sticky, muggy-or-worse air turns up on roughly 79% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
14196116
24196116
33186217
43186217
53176317
62176318
72176318
82176318
91176517
101186417
111186417
121186516
131196515
141196515
151206514
161206613
171216513
181216612
191216711
201216711
212216710
222216710
232216710
24120709
25120709
261197010
271197010
281187110
291177111
301177111
311167112

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 36 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 5:32 AM to 5:45 AM, and sunset from 6:09 PM to 6:23 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.65:326:09
212.65:336:09
312.65:336:10
412.65:336:10
512.65:346:11
612.65:346:11
712.65:346:12
812.65:356:12
912.65:356:13
1012.65:356:13
1112.65:366:14
1212.65:366:14
1312.65:366:15
1412.65:376:15
1512.65:376:16
1612.65:386:16
1712.65:386:17
1812.65:386:17
1912.65:396:18
2012.65:396:18
2112.65:406:19
2212.65:406:19
2312.65:416:20
2412.65:416:20
2512.65:426:21
2612.65:426:21
2712.65:436:21
2812.65:436:22
2912.65:446:22
3012.65:446:23
3112.65:456:23

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.76 kWh/m².

For context, solar energy here swings from a low near 5.02 kWh/m² to a high of 6.61 kWh/m² in September across the year — December's 5.76 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
35.7Bright
45.7Bright
55.7Bright
65.7Bright
75.7Bright
85.7Bright
95.7Bright
105.7Bright
115.7Bright
125.7Bright
135.7Bright
145.7Bright
155.7Bright
165.7Bright
175.7Bright
185.8Bright
195.8Bright
205.8Bright
215.8Bright
225.8Bright
235.8Bright
245.8Bright
255.8Bright
265.8Bright
275.8Bright
285.8Bright
295.8Bright
305.8Bright
315.8Bright
Planning a trip in December

Hazard calendar for Formosa do Rio Preto

In seasonPeak

In December, Formosa do Rio Preto sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Formosa do Rio Preto'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 Formosa do Rio Preto?

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

4.2
Sightseeing
7th-best month of the year
5.9
Beach & pool
9th-best month of the year

December is a reasonable time to visit Formosa do Rio Preto for sightseeing.

What to pack for Formosa do Rio Preto in December

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

In December, Formosa do Rio Preto sees daytime highs around 30°C and nights near 21°C. Pack light clothes and rain gear. Worth having: sun protection. About 15 days see rain.

light clothesrain gearsun protection

UV index in Formosa do Rio Preto in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Formosa do Rio Preto peaks around February 18 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeFeb 18UV 15Jun 22UV 9
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar15Extreme
Apr13Extreme
May10Extreme
Jun9Very high
Jul9Very high
Aug11Extreme
Sep12Extreme
Oct12Extreme
Nov13Extreme
Dec13Extreme

Air quality in Formosa do Rio Preto 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 Formosa do Rio Preto is worst in October — around 24 µg/m³ PM2.5 (moderate), about 6.2× the cleanest month (July, 4 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodOct 1224 µg/m³Jul 124 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb7Good
Mar7Good
Apr6Good
May5Good
Jun4Good
Jul4Good
Aug5Good
Sep21Moderate
Oct24Moderate
Nov10Good
Dec9Good
Location & terrain

Where is Formosa do Rio Preto?

Formosa do Rio Preto sits at 11.0°S, 45.2°W, 495 m above sea level, in Brazil. The nearest listed city is Corrente, 67 km away.

Topography around Formosa do Rio Preto

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Formosa do Rio Preto.

Within 3 km, the terrain around Formosa do Rio Preto has only modest variations in elevation — a maximum elevation change of 92 m around an average of 503 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 285 m; within 80 km, significant variations in elevation — a maximum elevation change of 473 m.

The land around Formosa do Rio Preto is covered by trees (42%) and grassland (28%) within 3 km, trees (66%) within 16 km, and trees (37%) and shrubs (35%) within 80 km.

3 km
92 m
16 km
285 m
80 km
473 m
treesshrubsgrasslandcroplandartificial surfaceswater
December weather nearby: Corrente 67 km · Santa Rita de Cássia 74 km · Riachão das Neves 84 km · Barreiras 125 km · Luis Eduardo Magalhães 133 km · São Desidério 148 km · Buritirama 175 km · Dianópolis 189 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 Formosa do Rio Preto (-11.0483°, -45.1931°, elevation 495 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).