Arinos weather in January

In January, Arinos sees average daytime highs of 30°C and overnight lows near 21°C, with 163 mm of rain across 16.4 wet days and about 12.8 hours of daylight. It is the 6th-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 21% 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 Arinos's 10th-clearest and 9th-windiest month. For the whole year in context, see Arinos's year-round climate.

Daytime high
30°
6th warmest
Overnight low
21°
10th coldest
Rainfall
163 mm
16.4 wet days
Daylight
12 h 54 min
6:48 AM – 7:39 PM
Cloud cover
71%
10th clearest
Wind
6 km/h
9th windiest
Solar energy
5.95 kWh/m²
Travel score
4.0
out of 10

Arinos 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 30°C through the month.

A typical January day in Arinos 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 34°C. Set against its neighbours, January runs on par with December and on par with February.

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
283121
293121
303121
313121

How January really feels in Arinos

Once humidity and wind are folded in, January averages 29 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
29
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in January is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Arinos weather by month

How January compares with the rest of the year at a glance. January is the 6th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 21°16316.412.84.0
Feb31° / 21°11913.612.54.1
Mar30° / 21°15015.412.14.2
Apr30° / 20°518.111.75.2
May30° / 19°122.411.36.3
Jun29° / 17°30.411.17.2
Jul29° / 16°00.111.17.3
Aug31° / 17°20.511.56.2
Sep33° / 20°142.111.94.6
Oct33° / 22°758.712.43.7
Nov30° / 21°18717.412.73.8
Dec30° / 21°2081912.93.9

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 21% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 12% of January, with mostly cloudy or overcast conditions the remaining 67%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12971
22971
32971
42971
52971
62971
72971
83169
93268
103268
113169
123367
133367
143367
153367
163466
173565
183565
193466
203466
213466
223466
233565
243565
253565
263565
273565
283565
293664
303664
313664

Chance of precipitation in January

Any precipitation

Arinos gets around 163 mm of rain over 16.4 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 53% and peaks near 56% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
156
256
356
456
555
655
755
854
954
1053
1153
1253
1353
1453
1553
1653
1753
1853
1953
2053
2153
2253
2352
2452
2551
2651
2751
2850
2950
3049
3149

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 54% of days. Sticky, muggy-or-worse air turns up on roughly 83% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
11155826
21155826
31145827
41145827
51145728
62155528
72155528
82155429
92155429
102155429
113155329
123155329
133155329
143155329
153165229
163165229
173165229
183165229
193155230
203155230
213155230
223155131
233155131
243145231
253145330
263145330
273145330
283145429
292145628
302155528
312155627

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 6:40 AM to 6:56 AM, and sunset from 7:36 PM to 7:39 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.96:407:36
212.96:407:36
312.96:417:36
412.96:417:37
512.96:427:37
612.96:427:37
712.96:437:37
812.96:447:38
912.96:447:38
1012.96:457:38
1112.96:457:38
1212.96:467:39
1312.96:467:39
1412.96:477:39
1512.96:487:39
1612.96:487:39
1712.86:497:39
1812.86:497:39
1912.86:507:40
2012.86:507:40
2112.86:517:40
2212.86:527:40
2312.86:527:40
2412.86:537:40
2512.86:537:40
2612.86:547:40
2712.86:547:40
2812.76:557:39
2912.76:557:39
3012.76:567:39
3112.76:567:39

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 5.95 kWh/m².

For context, solar energy here swings from a low near 4.53 kWh/m² to a high of 6.36 kWh/m² in October across the year — January's 5.95 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.9Bright
25.9Bright
35.9Bright
45.9Bright
55.9Bright
65.9Bright
75.9Bright
85.9Bright
95.9Bright
105.9Bright
115.9Bright
125.9Bright
135.9Bright
145.9Bright
155.9Bright
165.9Bright
175.9Bright
185.9Bright
195.9Bright
205.9Bright
215.9Bright
225.9Bright
236.0Bright
246.0Bright
256.0Bright
266.0Bright
276.0Bright
286.0Bright
296.0Bright
306.0Bright
316.0Bright
Planning a trip in January

Hazard calendar for Arinos

In seasonPeak

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

Arinos'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 Arinos?

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

4.0
Sightseeing
9th-best month of the year
5.7
Beach & pool
10th-best month of the year

January is a reasonable time to visit Arinos for sightseeing.

What to pack for Arinos in January

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

In January, Arinos sees daytime highs around 30°C and nights near 21°C. Pack light clothes and rain gear. Worth having: sun protection. About 16 days see rain.

light clothesrain gearsun protection

UV index in Arinos 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 Arinos peaks around February 14 at about 15 (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 14UV 15Jul 10UV 8
UV index (midday)Level
Jan15Extreme
Feb16Extreme
Mar14Extreme
Apr12Extreme
May9Very high
Jun8Very high
Jul8Very high
Aug10Very high
Sep12Extreme
Oct13Extreme
Nov14Extreme
Dec13Extreme
Location & terrain

Where is Arinos?

Arinos sits at 15.9°S, 46.1°W, 517 m above sea level, in Brazil. The nearest listed city is Urucuia, 46 km away.

Topography around Arinos

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

Within 3 km, the terrain around Arinos has only modest variations in elevation — a maximum elevation change of 47 m around an average of 514 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 452 m; within 80 km, significant variations in elevation — a maximum elevation change of 541 m.

The land around Arinos is covered by grassland (41%), shrubs (23%) and trees (20%) within 3 km, shrubs (34%), grassland (31%) and trees (27%) within 16 km, and shrubs (37%), grassland (29%) and trees (20%) within 80 km.

3 km
47 m
16 km
452 m
80 km
541 m
treesshrubsgrasslandcroplandartificial surfaceswater
January weather nearby: Urucuia 46 km · Buritis 48 km · Unaí 99 km · Brasilândia de Minas 122 km · São Francisco 133 km · Formosa 138 km · Paracatu 167 km · Planaltina 168 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 Arinos (-15.9169°, -46.1056°, elevation 517 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).