Ariquemes weather in January

In January, Ariquemes sees average daytime highs of 30°C and overnight lows near 23°C, with 282 mm of rain across 27.6 wet days and about 12.5 hours of daylight. It is the 11th-warmest and 1st-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 1% of the time in January, and the air most often feels oppressive.

Daylight stretches from about 12 h 36 min at the start of January to 12 h 24 min by month's end. Set against the rest of the year, January is Ariquemes's 11th-clearest and 6th-windiest month. For the whole year in context, see Ariquemes's year-round climate.

Daytime high
30°
11th warmest
Overnight low
23°
10th coldest
Rainfall
282 mm
27.6 wet days
Daylight
12 h 30 min
6:06 AM – 6:37 PM
Cloud cover
88%
11th clearest
Wind
5 km/h
6th windiest
Solar energy
4.62 kWh/m²
Travel score
2.8
out of 10

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 Ariquemes reaches about 30°C in the afternoon and slips back to 23°C overnight — a 7°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, January runs on par with December and on par with February.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13023
23023
33023
43023
53023
63023
73023
83023
93023
103023
113023
123023
133023
143023
153023
163023
173023
183023
193023
203023
213023
223023
233023
243023
253023
263023
273023
283023
293023
303023
313023

How January really feels in Ariquemes

Once humidity and wind are folded in, January 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 January is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Ariquemes weather by month

How January compares with the rest of the year at a glance. January is the 11th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 23°28227.612.52.8
Feb30° / 23°2792612.32.7
Mar30° / 23°27428.212.12.7
Apr30° / 23°18523.811.83.1
May30° / 22°9115.811.64.1
Jun32° / 21°204.411.44.9
Jul33° / 21°132.511.54.3
Aug34° / 21°325.411.73.3
Sep34° / 23°861411.92.8
Oct33° / 23°14220.212.22.7
Nov31° / 23°20823.212.52.8
Dec30° / 23°24626.812.62.8

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 1% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 4% of January, with mostly cloudy or overcast conditions the remaining 95%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1595
2595
3595
4595
5397
6397
7397
8496
9496
10496
11595
12595
13595
14694
15694
16694
17694
18694
19694
20694
21694
22694
23694
24694
25694
26694
27694
28694
29694
30694
31694

Chance of precipitation in January

Any precipitation

Ariquemes gets around 282 mm of rain over 27.6 wet days in January, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 89% and peaks near 91% on the wettest days.

0%20%40%60%80%100%151015202531
Rain chance (%)
190
290
390
491
591
691
791
891
991
1091
1191
1291
1390
1490
1589
1689
1789
1888
1988
2087
2187
2287
2387
2487
2588
2688
2788
2889
2989
3090
3191

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, January lands in the oppressive band about 82% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
18515
28416
38416
48317
58317
68218
78218
88119
98119
108119
118020
128020
138020
148119
158119
168119
178218
188218
198218
208317
218317
228317
238317
248317
258317
268218
278218
288218
298119
308119
318020

Wind in January

Winds average 5 km/h in January.

Across January, daily wind ranges from about 5 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 12 h 36 min at the start of January to 12 h 24 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 5:58 AM to 6:12 AM, and sunset from 6:32 PM to 6:39 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.65:586:32
212.65:596:33
312.65:596:33
412.66:006:34
512.66:006:34
612.66:016:34
712.66:016:35
812.66:026:35
912.56:026:35
1012.56:036:36
1112.56:036:36
1212.56:046:36
1312.56:046:36
1412.56:056:37
1512.56:056:37
1612.56:066:37
1712.56:066:37
1812.56:076:37
1912.56:076:38
2012.56:086:38
2112.56:086:38
2212.56:096:38
2312.56:096:38
2412.56:106:38
2512.56:106:38
2612.56:106:38
2712.56:116:39
2812.56:116:39
2912.46:126:39
3012.46:126:39
3112.46:126:39

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 4.62 kWh/m².

For context, solar energy here swings from a low near 4.4 kWh/m² to a high of 5.6 kWh/m² in October across the year — January's 4.62 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.7Bright
24.6Bright
34.6Bright
44.6Bright
54.6Bright
64.6Bright
74.6Bright
84.6Bright
94.6Bright
104.6Bright
114.6Bright
124.6Bright
134.6Bright
144.6Bright
154.6Bright
164.6Bright
174.6Bright
184.6Bright
194.7Bright
204.7Bright
214.7Bright
224.7Bright
234.7Bright
244.7Bright
254.7Bright
264.7Bright
274.7Bright
284.7Bright
294.7Bright
304.6Bright
314.6Bright
Planning a trip in January

Hazard calendar for Ariquemes

In seasonPeak

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

Ariquemes's rainy season runs October–April, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is January a good time to visit Ariquemes?

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

2.8
Sightseeing
6th-best month of the year
3.9
Beach & pool
10th-best month of the year

January is a weaker month for outdoor sightseeing in Ariquemes.

What to pack for Ariquemes in January

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

In January, Ariquemes sees daytime highs around 30°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 28 days see rain.

light clothesrain gearsun protection

UV index in Ariquemes 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 Ariquemes peaks around March 10 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near September 13 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateExtremeMar 10UV 15Sep 13UV 3
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar15Extreme
Apr13Extreme
May10Extreme
Jun9Very high
Jul9Very high
Aug6High
Sep3Moderate
Oct11Extreme
Nov13Extreme
Dec14Extreme

Air quality in Ariquemes 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 Ariquemes is worst in September — around 101 µg/m³ PM2.5 (unhealthy), about 10.3× the cleanest month (May, 10 µg/m³).

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

0306090120JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateUnhealthyModerateSep 1496 µg/m³May 1710 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb12Moderate
Mar14Moderate
Apr11Good
May10Good
Jun11Good
Jul15Moderate
Aug68Unhealthy
Sep101Unhealthy
Oct41Poor
Nov21Moderate
Dec15Moderate
Location & terrain

Where is Ariquemes?

Ariquemes sits at 9.9°S, 63.0°W, 139 m above sea level, in Brazil. The nearest listed city is Alto Paraíso, 36 km away.

Topography around Ariquemes

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

Within 3 km, the terrain around Ariquemes has only modest variations in elevation — a maximum elevation change of 148 m around an average of 132 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 197 m; within 80 km, significant variations in elevation — a maximum elevation change of 443 m.

The land around Ariquemes is covered by artificial surfaces (56%), grassland (21%) and trees (20%) within 3 km, grassland (52%) and trees (41%) within 16 km, and grassland (56%) and trees (42%) within 80 km.

3 km
148 m
16 km
197 m
80 km
443 m
treesgrasslandcroplandartificial surfacesbare terrainwater
January weather nearby: Alto Paraíso 36 km · Jaru 86 km · Buritis 92 km · Machadinho d'Oeste 127 km · Ouro Preto do Oeste 129 km · Candeias do Jamari 142 km · Porto Velho 159 km · Ji Paraná 161 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 Ariquemes (-9.9133°, -63.0408°, elevation 139 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).