Cachoeira do Arari weather in January

In January, Cachoeira do Arari sees average daytime highs of 31°C and overnight lows near 23°C, with 303 mm of rain across 28.4 wet days and about 12.1 hours of daylight. It is the 9th-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 31°C through the month. The sky is clear or mostly clear about 4% of the time in January, and the air most often feels oppressive.

Daylight stretches from about 12 h 06 min at the start of January to 12 hours by month's end. Set against the rest of the year, January is Cachoeira do Arari's 9th-clearest and 6th-windiest month. For the whole year in context, see Cachoeira do Arari's year-round climate.

Daytime high
31°
9th warmest
Overnight low
23°
6th coldest
Rainfall
303 mm
28.4 wet days
Daylight
12 h 06 min
6:24 AM – 6:27 PM
Cloud cover
82%
9th clearest
Wind
8 km/h
6th windiest
Solar energy
4.49 kWh/m²
Travel score
2.5
out of 10

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 31°C through the month.

A typical January day in Cachoeira do Arari reaches about 31°C in the afternoon and slips back to 23°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 33°C. Set against its neighbours, January runs about 2°C cooler than December and about 1°C warmer than February.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13224
23224
33224
43223
53123
63123
73123
83123
93123
103123
113123
123123
133123
143123
153123
163123
173123
183123
193123
203123
213123
223123
233123
243123
253123
263123
273123
283123
293123
303023
313023

How January really feels in Cachoeira do Arari

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.

Cachoeira do Arari weather by month

How January compares with the rest of the year at a glance. January is the 9th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 23°30328.412.12.5
Feb30° / 23°42227.3122.5
Mar30° / 23°51830.7122.5
Apr30° / 23°48829.6122.4
May31° / 23°35728122.6
Jun32° / 23°14721.311.93.1
Jul32° / 23°8816.611.93.5
Aug33° / 23°4412.8123.4
Sep34° / 24°299.3123.3
Oct34° / 24°276.4123.4
Nov34° / 24°407.7123.3
Dec33° / 24°1231912.12.8

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 4% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 10% of January, with mostly cloudy or overcast conditions the remaining 87%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12377
22377
32278
42278
52080
62080
71981
81981
91783
101684
111684
121585
131387
141387
151288
161189
171189
181090
191090
201090
21991
22991
23991
24991
25892
26892
27892
28793
29793
30793
31793

Chance of precipitation in January

Any precipitation

Cachoeira do Arari gets around 303 mm of rain over 28.4 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 91% and peaks near 95% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%100%151015202531
Rain chance (%)
184
285
386
487
587
688
789
889
990
1091
1191
1291
1392
1492
1592
1693
1793
1893
1993
2093
2193
2293
2393
2493
2594
2694
2794
2894
2995
3095
3195

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 55% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
15842
25842
35842
45743
55743
65743
75743
85743
95743
105743
115743
125743
135743
145743
155743
165644
175644
185644
195545
205545
215446
225446
235347
245347
255347
265347
275248
285248
295248
305149
315149

Wind in January

Winds average 8 km/h in January.

Across January, daily wind ranges from about 8 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
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
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 12 h 06 min at the start of January to 12 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over January. Sunrise moves from 6:17 AM to 6:28 AM, and sunset from 6:21 PM to 6:31 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.16:176:21
212.16:186:21
312.16:186:22
412.16:196:22
512.16:196:22
612.16:206:23
712.16:206:23
812.16:206:24
912.16:216:24
1012.16:216:25
1112.16:226:25
1212.16:226:25
1312.16:226:26
1412.16:236:26
1512.16:236:26
1612.16:246:27
1712.16:246:27
1812.16:246:27
1912.16:256:28
2012.16:256:28
2112.16:256:28
2212.06:266:29
2312.06:266:29
2412.06:266:29
2512.06:266:29
2612.06:276:30
2712.06:276:30
2812.06:276:30
2912.06:276:30
3012.06:286:30
3112.06:286:31

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 4.49 kWh/m².

For context, solar energy here swings from a low near 4 kWh/m² to a high of 6.34 kWh/m² in October across the year — January's 4.49 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.8Bright
24.7Bright
34.7Bright
44.7Bright
54.7Bright
64.6Bright
74.6Bright
84.6Bright
94.6Bright
104.5Bright
114.5Bright
124.5Bright
134.5Bright
144.5Bright
154.5Bright
164.5Bright
174.5Bright
184.4Bright
194.4Bright
204.4Bright
214.4Bright
224.4Bright
234.4Bright
244.4Bright
254.4Bright
264.4Bright
274.4Bright
284.4Bright
294.3Bright
304.3Bright
314.3Bright
Planning a trip in January

Hazard calendar for Cachoeira do Arari

In seasonPeak

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

Cachoeira do Arari's monsoon runs January–May, 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 Cachoeira do Arari?

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

2.5
Sightseeing
9th-best month of the year
3.8
Beach & pool
9th-best month of the year

January is a weaker month for outdoor sightseeing in Cachoeira do Arari.

What to pack for Cachoeira do Arari in January

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

In January, Cachoeira do Arari sees daytime highs around 31°C and nights near 23°C. Pack light clothes and rain gear. About 28 days see rain.

light clothesrain gear

Sea temperature near Cachoeira do Arari in January

The nearest coast averages about 29°C in January — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 40 km away) is warmest in June at about 29°C and coldest in March near 28°C.

The water stays above 20°C all year — warm enough for a swim any month.

26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan29Tropical
Feb28Tropical
Mar28Tropical
Apr29Tropical
May29Tropical
Jun29Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov29Tropical
Dec29Tropical

UV index in Cachoeira do Arari in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January 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 Cachoeira do Arari peaks around March 14 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 24 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 14UV 15Jul 24UV 10
UV index (midday)Level
Jan13Extreme
Feb15Extreme
Mar15Extreme
Apr14Extreme
May12Extreme
Jun11Extreme
Jul10Extreme
Aug10Extreme
Sep12Extreme
Oct12Extreme
Nov10Extreme
Dec10Extreme

Air quality in Cachoeira do Arari 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 Cachoeira do Arari is worst in February — around 22 µg/m³ PM2.5 (moderate), about 2.8× the cleanest month (July, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateFeb 2022 µg/m³Jul 168 µg/m³
PM2.5 (µg/m³)Level
Jan18Moderate
Feb22Moderate
Mar22Moderate
Apr17Moderate
May11Good
Jun9Good
Jul8Good
Aug9Good
Sep11Good
Oct13Moderate
Nov13Moderate
Dec14Moderate
Location & terrain

Where is Cachoeira do Arari?

Cachoeira do Arari sits at 1.0°S, 49.0°W, 8 m above sea level, in Brazil. The nearest listed city is Ponta de Pedras, 43 km away.

Topography around Cachoeira do Arari

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

Within 3 km, the terrain around Cachoeira do Arari has only modest variations in elevation — a maximum elevation change of 27 m around an average of 5 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 37 m; within 80 km, only modest variations in elevation — a maximum elevation change of 50 m.

The land around Cachoeira do Arari is covered by grassland (60%) within 3 km, grassland (72%) within 16 km, and grassland (37%), trees (34%) and water (20%) within 80 km.

3 km
27 m
16 km
37 m
80 km
50 m
treesgrasslandcroplandartificial surfaceswaterwetland
January weather nearby: Ponta de Pedras 43 km · Salvaterra 57 km · Soure 59 km · Muaná 64 km · Barcarena 67 km · Belém 71 km · Ananindeua 77 km · Santa Bárbara do Pará 78 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 Cachoeira do Arari (-1.0114°, -48.9633°, elevation 8 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).