Cachoeira do Piriá weather in December

In December, Cachoeira do Piriá sees average daytime highs of 33°C and overnight lows near 24°C, with 86 mm of rain across 14.5 wet days and about 12.1 hours of daylight. It is the 3rd-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 33°C through the month. The sky is clear or mostly clear about 14% of the time in December, and the air most often feels oppressive.

Daylight stretches from about 12 h 06 min at the start of December to 12 h 06 min by month's end. Set against the rest of the year, December is Cachoeira do Piriá's 7th-clearest and 4th-windiest month. For the whole year in context, see Cachoeira do Piriá's year-round climate.

Daytime high
33°
3rd warmest
Overnight low
24°
12th coldest
Rainfall
86 mm
14.5 wet days
Daylight
12 h 06 min
5:59 AM – 6:05 PM
Cloud cover
67%
7th clearest
Wind
10 km/h
4th windiest
Solar energy
5.17 kWh/m²
Travel score
3.3
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 33°C through the month.

A typical December day in Cachoeira do Piriá reaches about 33°C in the afternoon and slips back to 24°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 31°C and 34°C. Set against its neighbours, December runs on par with November and about 1°C warmer than January.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13324
23324
33324
43324
53324
63324
73324
83324
93324
103324
113324
123324
133324
143324
153324
163324
173324
183224
193224
203224
213224
223224
233224
243224
253224
263224
273224
283224
293224
303224
313224

How December really feels in Cachoeira do Piriá

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

Cachoeira do Piriá weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 23°22025.512.12.8
Feb30° / 23°29626.412.12.6
Mar30° / 23°38530.1122.6
Apr30° / 23°37629.1122.6
May31° / 23°22727.511.92.8
Jun31° / 23°11921.211.93.4
Jul31° / 22°8818.211.94.0
Aug31° / 22°4211.111.94.4
Sep32° / 23°277.7124.1
Oct33° / 23°275.9123.9
Nov33° / 24°36712.13.7
Dec33° / 24°8614.512.13.3

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 14% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 24% of December, with mostly cloudy or overcast conditions the remaining 61%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15149
25050
35149
45149
55050
65050
74951
84951
94852
104753
114654
124555
134357
144357
154060
163862
173664
183565
193367
203367
213169
223169
232971
242971
252971
262872
272872
282872
292773
302674
312674

Chance of precipitation in December

Any precipitation

Cachoeira do Piriá gets around 86 mm of rain over 14.5 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 47% and peaks near 66% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
126
227
328
429
530
632
734
835
937
1039
1141
1243
1344
1446
1548
1649
1750
1852
1953
2054
2155
2256
2357
2458
2559
2660
2761
2862
2963
3065
3166

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the oppressive band about 97% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
11981
21981
31981
41981
51981
61981
71981
81981
91981
101981
111981
121981
131981
140991
150991
160982
170982
180982
190982
200973
211963
221963
231954
241954
251954
261945
271945
281945
291936
301936
311936

Wind in December

Winds average 10 km/h in December.

Across December, daily wind ranges from about 9 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
259calm
269calm
279calm
289calm
299calm
309calm
319calm

Sunrise & sunset in December

DaylightNight

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

Days grow by about 0 minutes over December. Sunrise moves from 5:53 AM to 6:06 AM, and sunset from 5:59 PM to 6:12 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.15:535:59
212.15:535:59
312.15:546:00
412.15:546:00
512.15:556:00
612.15:556:01
712.15:556:01
812.15:566:02
912.15:566:02
1012.15:576:03
1112.15:576:03
1212.15:586:04
1312.15:586:04
1412.15:586:04
1512.15:596:05
1612.15:596:05
1712.16:006:06
1812.16:006:06
1912.16:016:07
2012.16:016:07
2112.16:026:08
2212.16:026:08
2312.16:036:09
2412.16:036:09
2512.16:046:10
2612.16:046:10
2712.16:046:11
2812.16:056:11
2912.16:056:11
3012.16:066:12
3112.16:066:12

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.17 kWh/m².

For context, solar energy here swings from a low near 4.03 kWh/m² to a high of 5.95 kWh/m² in October across the year — December's 5.17 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.5Bright
55.4Bright
65.4Bright
75.4Bright
85.4Bright
95.4Bright
105.3Bright
115.3Bright
125.3Bright
135.3Bright
145.2Bright
155.2Bright
165.2Bright
175.1Bright
185.1Bright
195.1Bright
205.0Bright
215.0Bright
225.0Bright
235.0Bright
245.0Bright
254.9Bright
264.9Bright
274.9Bright
284.9Bright
294.9Bright
304.8Bright
314.8Bright
Planning a trip in December

Hazard calendar for Cachoeira do Piriá

In seasonPeak

None of Cachoeira do Piriá's seasonal hazards are active in December. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Cachoeira do Piriá'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 December a good time to visit Cachoeira do Piriá?

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

3.3
Sightseeing
7th-best month of the year
5.5
Beach & pool
6th-best month of the year

December is a weaker month for outdoor sightseeing in Cachoeira do Piriá.

What to pack for Cachoeira do Piriá in December

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

In December, Cachoeira do Piriá sees daytime highs around 33°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 15 days see rain.

light clothesrain gearsun protection

UV index in Cachoeira do Piriá in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 11 (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 Piriá peaks around March 17 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 17 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 17UV 15Jul 17UV 10
UV index (midday)Level
Jan13Extreme
Feb14Extreme
Mar15Extreme
Apr14Extreme
May12Extreme
Jun11Extreme
Jul10Extreme
Aug11Extreme
Sep12Extreme
Oct12Extreme
Nov11Extreme
Dec11Extreme

Air quality in Cachoeira do Piriá in December

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Cachoeira do Piriá is worst in February — around 19 µg/m³ PM2.5 (moderate), about 2.9× the cleanest month (July, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateFeb 2019 µg/m³Jul 127 µg/m³
PM2.5 (µg/m³)Level
Jan16Moderate
Feb19Moderate
Mar19Moderate
Apr14Moderate
May8Good
Jun7Good
Jul7Good
Aug8Good
Sep10Good
Oct12Good
Nov18Moderate
Dec18Moderate
Location & terrain

Where is Cachoeira do Piriá?

Cachoeira do Piriá sits at 1.8°S, 46.5°W, 77 m above sea level, in Brazil. The nearest listed city is Santa Luzia do Pará, 47 km away.

Topography around Cachoeira do Piriá

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

Within 3 km, the terrain around Cachoeira do Piriá has only modest variations in elevation — a maximum elevation change of 117 m around an average of 35 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 128 m; within 80 km, only modest variations in elevation — a maximum elevation change of 206 m.

The land around Cachoeira do Piriá is covered by grassland (52%) and trees (46%) within 3 km, trees (57%) and grassland (43%) within 16 km, and trees (56%) and grassland (42%) within 80 km.

3 km
117 m
16 km
128 m
80 km
206 m
treesgrasslandartificial surfacesbare terrainmangroves
December weather nearby: Santa Luzia do Pará 47 km · Capitão Poço 57 km · Garrafão do Norte 60 km · Centro Novo do Maranhão 63 km · Ourém 67 km · Maracaçumé 72 km · Nova Esperança do Piriá 73 km · Viseu 77 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 Piriá (-1.7597°, -46.545°, elevation 77 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).