Arcos weather in January

In January, Arcos sees average daytime highs of 28°C and overnight lows near 20°C, with 241 mm of rain across 21.3 wet days and about 13.1 hours of daylight. It is the 4th-warmest and 2nd-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 13% of the time in January, and the air most often feels muggy.

Daylight stretches from about 13 h 12 min at the start of January to 12 h 54 min by month's end. Set against the rest of the year, January is Arcos's 11th-clearest and 7th-windiest month. For the whole year in context, see Arcos's year-round climate.

Daytime high
28°
4th warmest
Overnight low
20°
12th coldest
Rainfall
241 mm
21.3 wet days
Daylight
13 h 06 min
6:38 AM – 7:45 PM
Cloud cover
76%
11th clearest
Wind
8 km/h
7th windiest
Solar energy
5.7 kWh/m²
Travel score
4.2
out of 10

Arcos 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 Arcos 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
232820
242820
252820
262820
272820
282920
292920
302920
312920

Arcos weather by month

How January compares with the rest of the year at a glance. January is the 4th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 20°24121.313.14.2
Feb29° / 20°14016.312.74.5
Mar28° / 19°15918.812.14.8
Apr27° / 18°579.311.56.6
May25° / 15°345.111.17.7
Jun25° / 14°122.110.88.5
Jul25° / 13°71.310.98.7
Aug27° / 14°11211.38.2
Sep29° / 17°466.711.96.4
Oct29° / 19°8411.612.55.2
Nov28° / 19°18419.2134.7
Dec28° / 20°24723.913.24.3

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 13% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 13% of January, with mostly cloudy or overcast conditions the remaining 74%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12377
22377
32377
42476
52476
62476
72377
82377
92377
102476
112575
122674
132674
142674
152674
162773
172773
182773
192773
202773
212773
222773
232773
242872
252773
262773
272773
282872
292872
303169
313169

Chance of precipitation in January

Any precipitation

Arcos gets around 241 mm of rain over 21.3 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 69% and peaks near 75% on the wettest days.

0%20%40%60%80%151015202531
Rain chance (%)
175
274
373
472
571
671
770
869
968
1068
1167
1267
1366
1466
1566
1667
1767
1867
1968
2068
2169
2269
2369
2469
2569
2669
2769
2868
2968
3067
3166

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 73% of days. Sticky, muggy-or-worse air turns up on roughly 75% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1120772
2121762
3121762
4222742
5222742
6223723
7223723
8224713
9224713
10224713
11225703
12225703
13225703
14225703
15324712
16324712
17324712
18323722
19322732
20322732
21321742
22321742
23321742
24320752
25320743
26320743
27320743
28321733
29321733
30321733
31321733

Wind in January

Winds average 8 km/h in January.

Across January, daily wind ranges from about 7 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
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
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 13 h 12 min at the start of January to 12 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 18 minutes over January. Sunrise moves from 6:29 AM to 6:48 AM, and sunset from 7:42 PM to 7:43 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.26:297:42
213.26:307:42
313.26:307:42
413.26:317:42
513.26:317:43
613.26:327:43
713.26:337:43
813.26:337:43
913.26:347:44
1013.26:347:44
1113.16:357:44
1213.16:367:44
1313.16:367:44
1413.16:377:44
1513.16:387:45
1613.16:387:45
1713.16:397:45
1813.16:407:45
1913.16:407:45
2013.16:417:45
2113.16:427:45
2213.06:427:45
2313.06:437:45
2413.06:437:44
2513.06:447:44
2613.06:457:44
2713.06:457:44
2813.06:467:44
2913.06:477:44
3012.96:477:43
3112.96:487:43

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 5.7 kWh/m².

For context, solar energy here swings from a low near 3.99 kWh/m² to a high of 5.92 kWh/m² in October across the year — January's 5.7 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.6Bright
25.6Bright
35.6Bright
45.6Bright
55.6Bright
65.6Bright
75.7Bright
85.7Bright
95.7Bright
105.7Bright
115.7Bright
125.7Bright
135.8Bright
145.8Bright
155.8Bright
165.8Bright
175.8Bright
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 January

Hazard calendar for Arcos

In seasonPeak

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

Arcos'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 Arcos?

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

4.2
Sightseeing
12th-best month of the year
5.0
Beach & pool
11th-best month of the year

January is a reasonable time to visit Arcos for sightseeing.

What to pack for Arcos in January

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

In January, Arcos sees daytime highs around 28°C and nights near 20°C. Pack light clothes and rain gear. Worth having: sun protection. About 21 days see rain.

light clothesrain gearsun protection

UV index in Arcos in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 16 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Arcos peaks around January 21 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 at about 7 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeJan 21UV 15Jun 20UV 7
UV index (midday)Level
Jan16Extreme
Feb15Extreme
Mar13Extreme
Apr10Extreme
May8Very high
Jun7High
Jul7High
Aug9Very high
Sep10Very high
Oct12Extreme
Nov14Extreme
Dec14Extreme

Air quality in Arcos 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 Arcos is worst in September — around 20 µg/m³ PM2.5 (moderate), about 2.8× the cleanest month (November, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1719 µg/m³Nov 237 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb8Good
Mar8Good
Apr8Good
May8Good
Jun8Good
Jul7Good
Aug10Good
Sep20Moderate
Oct12Good
Nov7Good
Dec7Good
Location & terrain

Where is Arcos?

Arcos sits at 20.3°S, 45.5°W, 737 m above sea level, in Brazil. The nearest listed city is Formiga, 23 km away.

Topography around Arcos

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

Within 3 km, the terrain around Arcos has only modest variations in elevation — a maximum elevation change of 130 m around an average of 753 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 405 m; within 80 km, large variations in elevation — a maximum elevation change of 791 m.

The land around Arcos is covered by trees (32%), grassland (31%) and artificial surfaces (28%) within 3 km, trees (42%) and grassland (38%) within 16 km, and grassland (52%) and trees (30%) within 80 km.

3 km
130 m
16 km
405 m
80 km
791 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
January weather nearby: Formiga 23 km · Lagoa da Prata 29 km · Santo Antônio do Monte 34 km · Água Rasa 42 km · Itapecerica 48 km · Piumhi 48 km · Bambuí 55 km · Luz 56 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 Arcos (-20.2819°, -45.5394°, elevation 737 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).