Guariba weather in December

In December, Guariba sees average daytime highs of 30°C and overnight lows near 21°C, with 228 mm of rain across 22.2 wet days and about 13.3 hours of daylight. It is the 5th-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 14% 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 18 min by month's end. Set against the rest of the year, December is Guariba's 11th-clearest and 8th-windiest month. For the whole year in context, see Guariba's year-round climate.

Daytime high
30°
5th warmest
Overnight low
21°
10th coldest
Rainfall
228 mm
22.2 wet days
Daylight
13 h 18 min
6:30 AM – 7:48 PM
Cloud cover
73%
11th clearest
Wind
8 km/h
8th windiest
Solar energy
5.8 kWh/m²
Travel score
3.7
out of 10

Guariba 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 Guariba 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 26°C and 32°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
73021
83021
93021
103021
113021
122921
132921
143021
153021
163021
173021
183021
193021
203021
213021
223021
233021
243021
253021
263021
273021
283021
292921
302921
312921

Guariba weather by month

How December compares with the rest of the year at a glance. December is the 5th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 21°27022.513.23.6
Feb30° / 21°18618.812.73.8
Mar30° / 20°16918.712.24.2
Apr29° / 19°689.111.55.8
May27° / 16°465.8117.5
Jun26° / 15°283.210.78.0
Jul27° / 15°202.710.88.1
Aug29° / 16°222.811.37.0
Sep30° / 18°707.411.95.3
Oct31° / 20°12313.312.54.3
Nov30° / 20°18117.6134.1
Dec30° / 21°22822.213.33.7

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 15% of December, with mostly cloudy or overcast conditions the remaining 71%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13268
23268
33169
42971
52971
62872
72773
82773
92773
102773
112773
122773
132971
142971
152971
163070
173070
183070
193070
203169
213268
223169
233169
243070
252971
262971
272872
282773
292674
302674
312674

Chance of precipitation in December

Any precipitation

Guariba gets around 228 mm of rain over 22.2 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 74% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
164
266
367
468
569
669
770
870
970
1071
1171
1271
1371
1471
1571
1671
1771
1871
1971
2071
2171
2272
2372
2473
2573
2674
2774
2874
2974
3074
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 64% of days. Sticky, muggy-or-worse air turns up on roughly 89% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
116195618
205185819
304175821
404165822
504155823
603145924
703136024
802126125
902116225
1002116225
1101106425
1201106425
1301106425
1401106425
1500106525
160096724
170096724
180096724
190096724
200086824
210086725
220086725
230076726
240076627
250066727
260066628
270056629
280056530
290056530
300056431
310056431

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 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 December

DaylightNight

Daylight runs from about 13 h 12 min at the start of December to 13 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over December. Sunrise moves from 6:26 AM to 6:38 AM, and sunset from 7:39 PM to 7:55 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.26:267:39
213.26:277:40
313.26:277:40
413.26:277:41
513.26:277:41
613.26:277:42
713.36:277:43
813.36:287:43
913.36:287:44
1013.36:287:44
1113.36:297:45
1213.36:297:46
1313.36:297:46
1413.36:307:47
1513.36:307:47
1613.36:307:48
1713.36:317:48
1813.36:317:49
1913.36:317:49
2013.36:327:50
2113.36:327:50
2213.36:337:51
2313.36:337:51
2413.36:347:52
2513.36:347:52
2613.36:357:53
2713.36:357:53
2813.36:367:54
2913.36:367:54
3013.36:377:54
3113.36:387:55

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.8 kWh/m².

For context, solar energy here swings from a low near 3.89 kWh/m² to a high of 6.01 kWh/m² in October across the year — December's 5.8 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.8Bright
25.8Bright
35.8Bright
45.8Bright
55.7Bright
65.7Bright
75.7Bright
85.7Bright
95.7Bright
105.7Bright
115.7Bright
125.7Bright
135.8Bright
145.8Bright
155.8Bright
165.8Bright
175.8Bright
185.8Bright
195.8Bright
205.8Bright
215.8Bright
225.8Bright
235.8Bright
245.8Bright
255.8Bright
265.8Bright
275.8Bright
285.7Bright
295.7Bright
305.7Bright
315.7Bright
Planning a trip in December

Hazard calendar for Guariba

In seasonPeak

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

Guariba's monsoon runs October–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 Guariba?

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

3.7
Sightseeing
11th-best month of the year
5.0
Beach & pool
11th-best month of the year

December is a weaker month for outdoor sightseeing in Guariba.

What to pack for Guariba in December

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

In December, Guariba sees daytime highs around 30°C and nights near 21°C. Pack light clothes and rain gear. Worth having: sun protection. About 22 days see rain.

light clothesrain gearsun protection

UV index in Guariba 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 Guariba peaks around January 21 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 21 at about 6 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeJan 21UV 15Jun 21UV 6
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar13Extreme
Apr10Extreme
May8Very high
Jun6High
Jul7High
Aug9Very high
Sep9Very high
Oct10Extreme
Nov13Extreme
Dec14Extreme

Air quality in Guariba 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 Guariba is worst in September — around 46 µg/m³ PM2.5 (poor), about 5.3× the cleanest month (November, 9 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecGoodModeratePoorModerateGoodSep 1344 µg/m³Nov 229 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb12Good
Mar11Good
Apr12Good
May13Moderate
Jun14Moderate
Jul15Moderate
Aug35Moderate
Sep46Poor
Oct18Moderate
Nov9Good
Dec10Good
Location & terrain

Where is Guariba?

Guariba sits at 21.4°S, 48.2°W, 619 m above sea level, in Brazil. The nearest listed city is Jaboticabal, 15 km away.

Topography around Guariba

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

Within 3 km, the terrain around Guariba has only modest variations in elevation — a maximum elevation change of 128 m around an average of 631 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 188 m; within 80 km, significant variations in elevation — a maximum elevation change of 551 m.

The land around Guariba is covered by cropland (63%) and artificial surfaces (23%) within 3 km, cropland (78%) within 16 km, and cropland (68%) and trees (21%) within 80 km.

3 km
128 m
16 km
188 m
80 km
551 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Jaboticabal 15 km · Pradópolis 17 km · Barrinha 20 km · Taquaritinga 29 km · Monte Alto 30 km · Matão 31 km · Sertãozinho 35 km · Pitangueiras 39 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 Guariba (-21.36°, -48.2283°, elevation 619 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).