Formosa weather in January

In January, Formosa sees average daytime highs of 28°C and overnight lows near 20°C, with 202 mm of rain across 18.6 wet days and about 12.8 hours of daylight. It is the 8th-warmest and 3rd-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 17% of the time in January, and the air most often feels muggy.

Daylight stretches from about 12 h 54 min at the start of January to 12 h 42 min by month's end. Set against the rest of the year, January is Formosa's 10th-clearest and 9th-windiest month. For the whole year in context, see Formosa's year-round climate.

Daytime high
28°
8th warmest
Overnight low
20°
10th coldest
Rainfall
202 mm
18.6 wet days
Daylight
12 h 48 min
6:54 AM – 7:44 PM
Cloud cover
75%
10th clearest
Wind
6 km/h
9th windiest
Solar energy
5.66 kWh/m²
Travel score
4.5
out of 10

Formosa is human settlement in Brazil.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 28°C through the month.

A typical January day in Formosa reaches about 28°C in the afternoon and slips back to 20°C overnight — a 9°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, January runs on par with December and on par with February.

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
232920
242920
252920
262920
272920
282920
292920
302920
312920

Formosa weather by month

How January compares with the rest of the year at a glance. January is the 8th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 20°20218.612.84.5
Feb29° / 20°15916.512.54.5
Mar29° / 20°17418.312.14.6
Apr29° / 19°691011.75.7
May28° / 17°15311.37.3
Jun27° / 16°40.611.18.3
Jul28° / 15°0011.28.5
Aug29° / 17°41.111.57.1
Sep31° / 19°233.811.95.3
Oct31° / 20°10311.612.44.4
Nov29° / 20°21820.812.74.1
Dec28° / 20°24420.612.94.3

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 17% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 11% of January, with mostly cloudy or overcast conditions the remaining 72%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12476
22476
32377
42476
52575
62575
72674
82674
92773
102773
112773
122872
132872
142872
152872
162971
173070
183070
193070
202971
212971
222971
232971
242971
252971
262971
272971
283070
293070
303169
313169

Chance of precipitation in January

Any precipitation

Formosa gets around 202 mm of rain over 18.6 wet days in January. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 60% and peaks near 63% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
163
263
363
462
562
662
761
861
960
1060
1160
1259
1359
1459
1559
1659
1759
1859
1959
2059
2160
2260
2360
2459
2559
2659
2759
2859
2958
3058
3158

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, January lands in the muggy band about 69% of days. Sticky, muggy-or-worse air turns up on roughly 70% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1524710
2523720
3523720
4523711
5523711
6523711
7524701
8624691
9624691
10625681
11625681
12626671
13726661
14726661
15726661
16726661
17726661
18726661
19725671
20725671
21724681
22724681
23723691
24623701
25623701
26623701
27623701
28523711
29523711
30523711
31423721

Wind in January

Winds average 6 km/h in January.

Across January, 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 January

DaylightNight

Daylight runs from about 12 h 54 min at the start of January to 12 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 12 minutes over January. Sunrise moves from 6:45 AM to 7:02 AM, and sunset from 7:40 PM to 7:44 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.96:457:40
212.96:467:40
312.96:467:40
412.96:477:41
512.96:477:41
612.96:487:41
712.96:497:42
812.96:497:42
912.96:507:42
1012.96:507:42
1112.96:517:43
1212.96:517:43
1312.96:527:43
1412.86:537:43
1512.86:537:43
1612.86:547:44
1712.86:547:44
1812.86:557:44
1912.86:557:44
2012.86:567:44
2112.86:577:44
2212.86:577:44
2312.86:587:44
2412.86:587:44
2512.86:597:44
2612.76:597:44
2712.77:007:44
2812.77:007:44
2912.77:017:44
3012.77:017:44
3112.77:027:44

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 5.66 kWh/m².

For context, solar energy here swings from a low near 4.62 kWh/m² to a high of 6.24 kWh/m² in September across the year — January's 5.66 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
95.6Bright
105.6Bright
115.6Bright
125.6Bright
135.6Bright
145.6Bright
155.6Bright
165.6Bright
175.6Bright
185.6Bright
195.6Bright
205.7Bright
215.7Bright
225.7Bright
235.7Bright
245.7Bright
255.7Bright
265.7Bright
275.7Bright
285.7Bright
295.7Bright
305.7Bright
315.7Bright
Planning a trip in January

Hazard calendar for Formosa

In seasonPeak

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

Formosa'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 January a good time to visit Formosa?

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

4.5
Sightseeing
8th-best month of the year
5.4
Beach & pool
10th-best month of the year

January is a reasonable time to visit Formosa for sightseeing.

What to pack for Formosa in January

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

In January, Formosa sees daytime highs around 28°C and nights near 20°C. Pack light clothes and rain gear. Worth having: sun protection. About 19 days see rain.

light clothesrain gearsun protection

UV index in Formosa in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 15 (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 peaks around February 15 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 10 at about 8 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeFeb 15UV 16Jul 10UV 8
UV index (midday)Level
Jan15Extreme
Feb16Extreme
Mar15Extreme
Apr12Extreme
May10Very high
Jun8Very high
Jul8Very high
Aug10Very high
Sep12Extreme
Oct13Extreme
Nov14Extreme
Dec13Extreme

Air quality in Formosa in January

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where January falls, not just the annual average.

Air quality in Formosa is worst in September — around 24 µg/m³ PM2.5 (moderate), about 3.5× the cleanest month (July, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1923 µg/m³Jul 127 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb9Good
Mar10Good
Apr10Good
May9Good
Jun8Good
Jul7Good
Aug10Good
Sep24Moderate
Oct17Moderate
Nov9Good
Dec9Good
Location & terrain

Where is Formosa?

Formosa sits at 15.5°S, 47.3°W, 915 m above sea level, in Brazil. The nearest listed city is Planaltina, 31 km away.

Topography around Formosa

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

Within 3 km, the terrain around Formosa has only modest variations in elevation — a maximum elevation change of 176 m around an average of 917 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 610 m; within 80 km, large variations in elevation — a maximum elevation change of 848 m.

The land around Formosa is covered by artificial surfaces (47%) and grassland (25%) within 3 km, grassland (34%), trees (24%) and cropland (20%) within 16 km, and grassland (34%), trees (23%) and cropland (22%) within 80 km.

3 km
176 m
16 km
610 m
80 km
848 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
January weather nearby: Planaltina 31 km · Planaltina 35 km · Sobradinho 51 km · Itapoã 52 km · Sobradinho II 55 km · Paranoá 55 km · Lago Norte 60 km · São Sebastião 62 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 (-15.5372°, -47.3344°, elevation 915 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).