Guapiaçu weather in December

In December, Guapiaçu sees average daytime highs of 30°C and overnight lows near 22°C, with 224 mm of rain across 22.3 wet days and about 13.2 hours of daylight. It is the 4th-warmest and 2nd-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 15% of the time in December, and the air most often feels muggy.

Daylight stretches from about 13 h 12 min at the start of December to 13 h 12 min by month's end. Set against the rest of the year, December is Guapiaçu's 11th-clearest and 8th-windiest month. For the whole year in context, see Guapiaçu's year-round climate.

Daytime high
30°
4th warmest
Overnight low
22°
10th coldest
Rainfall
224 mm
22.3 wet days
Daylight
13 h 18 min
6:35 AM – 7:51 PM
Cloud cover
73%
11th clearest
Wind
8 km/h
8th windiest
Solar energy
5.84 kWh/m²
Travel score
3.5
out of 10

Guapiaçu is human settlement in Brazil.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 30°C through the month.

A typical December day in Guapiaçu reaches about 30°C in the afternoon and slips back to 22°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 33°C. Set against its neighbours, December runs on par with November and on par with January.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13021
23021
33021
43021
53021
63021
73022
83022
93022
103022
113022
123022
133022
143022
153022
163022
173022
183022
193022
203022
213022
223022
233022
243022
253022
263022
273022
283022
293022
303022
313022

How December really feels in Guapiaçu

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.

Guapiaçu weather by month

How December compares with the rest of the year at a glance. December 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
Jan30° / 22°26423.213.13.4
Feb30° / 22°18919.812.73.6
Mar30° / 21°17219.112.14.0
Apr29° / 20°629.111.55.6
May27° / 17°445.1117.4
Jun27° / 16°243.110.87.9
Jul28° / 16°152.110.98.0
Aug30° / 17°182.511.36.5
Sep31° / 19°586.511.95.0
Oct31° / 21°11112.112.54.1
Nov31° / 21°16617133.9
Dec30° / 22°22422.313.23.5

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 15% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 15% of December, with mostly cloudy or overcast conditions the remaining 71%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13268
23070
33169
43070
53070
62872
72872
82872
92872
102872
112872
122971
132971
143070
153070
163169
173169
183268
193268
203268
213268
223268
233268
243169
253070
263070
272971
282872
292773
302773
312773

Chance of precipitation in December

Any precipitation

Guapiaçu gets around 224 mm of rain over 22.3 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 71% and peaks near 73% on the wettest days.

0%20%40%60%80%151015202531
Rain chance (%)
166
268
369
470
571
672
772
872
973
1072
1172
1272
1372
1472
1572
1672
1771
1871
1971
2071
2171
2271
2371
2471
2572
2672
2772
2872
2972
3073
3173

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the muggy band about 48% of days. Sticky, muggy-or-worse air turns up on roughly 93% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
114134934
213124836
313104838
41394740
51394641
61284643
71274644
81274645
90174646
100164646
110164746
120164746
130164746
140064846
150064845
160064945
170065045
180065044
190055144
200055144
210055144
220045145
230045145
240045046
250044947
260034848
270034750
280034651
290034552
300034453
310034354

Wind in December

Winds average 8 km/h in December.

Across December, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 13 h 12 min at the start of December to 13 h 12 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 6:31 AM to 6:43 AM, and sunset from 7:42 PM to 7:57 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.26:317:42
213.26:327:42
313.26:327:43
413.26:327:44
513.26:327:44
613.26:327:45
713.26:337:46
813.26:337:46
913.26:337:47
1013.26:337:47
1113.26:347:48
1213.26:347:48
1313.26:347:49
1413.36:357:50
1513.36:357:50
1613.36:357:51
1713.36:367:51
1813.36:367:52
1913.36:377:52
2013.36:377:53
2113.36:377:53
2213.36:387:54
2313.36:387:54
2413.36:397:55
2513.36:397:55
2613.36:407:56
2713.36:407:56
2813.36:417:56
2913.36:427:57
3013.36:427:57
3113.26:437:57

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.84 kWh/m².

For context, solar energy here swings from a low near 3.94 kWh/m² to a high of 6.11 kWh/m² in October across the year — December's 5.84 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.9Bright
25.9Bright
35.8Bright
45.8Bright
55.8Bright
65.8Bright
75.8Bright
85.8Bright
95.8Bright
105.8Bright
115.8Bright
125.8Bright
135.8Bright
145.8Bright
155.8Bright
165.8Bright
175.8Bright
185.9Bright
195.9Bright
205.9Bright
215.9Bright
225.9Bright
235.9Bright
245.9Bright
255.9Bright
265.8Bright
275.8Bright
285.8Bright
295.8Bright
305.8Bright
315.7Bright
Planning a trip in December

Hazard calendar for Guapiaçu

In seasonPeak

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

Guapiaçu'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 December a good time to visit Guapiaçu?

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

3.5
Sightseeing
11th-best month of the year
4.9
Beach & pool
11th-best month of the year

December is a weaker month for outdoor sightseeing in Guapiaçu.

What to pack for Guapiaçu in December

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

In December, Guapiaçu sees daytime highs around 30°C and nights near 22°C. Pack light clothes and rain gear. Worth having: sun protection. About 22 days see rain.

light clothesrain gearsun protection

UV index in Guapiaçu in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 14 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Guapiaçu peaks around January 22 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 22UV 15Jun 20UV 7
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar13Extreme
Apr10Extreme
May8Very high
Jun7High
Jul7High
Aug8Very high
Sep10Very high
Oct10Extreme
Nov13Extreme
Dec14Extreme

Air quality in Guapiaçu 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 Guapiaçu is worst in September — around 24 µg/m³ PM2.5 (moderate), about 3.1× the cleanest month (November, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1423 µg/m³Nov 228 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb9Good
Mar10Good
Apr10Good
May11Good
Jun10Good
Jul10Good
Aug19Moderate
Sep24Moderate
Oct16Moderate
Nov8Good
Dec8Good
Location & terrain

Where is Guapiaçu?

Guapiaçu sits at 20.8°S, 49.2°W, 508 m above sea level, in Brazil. The nearest listed city is São José do Rio Preto, 17 km away.

Topography around Guapiaçu

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

Within 3 km, the terrain around Guapiaçu has only modest variations in elevation — a maximum elevation change of 100 m around an average of 522 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 157 m; within 80 km, significant variations in elevation — a maximum elevation change of 288 m.

The land around Guapiaçu is covered by cropland (49%) and trees (21%) within 3 km, cropland (56%) and trees (22%) within 16 km, and cropland (63%) and trees (20%) within 80 km.

3 km
100 m
16 km
157 m
80 km
288 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: São José do Rio Preto 17 km · Bady Bassitt 27 km · Nova Granada 31 km · Mirassol 31 km · Potirendaba 32 km · Olímpia 32 km · Catanduva 46 km · Tanabi 48 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 Guapiaçu (-20.795°, -49.2203°, elevation 508 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).