Jales weather in December

In December, Jales sees average daytime highs of 31°C and overnight lows near 22°C, with 210 mm of rain across 22.1 wet days and about 13.2 hours of daylight. It is the 5th-warmest and 2nd-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 15% of the time in December, and the air most often feels oppressive.

Daylight stretches from about 13 h 06 min at the start of December to 13 h 12 min by month's end. Set against the rest of the year, December is Jales's 11th-clearest and 8th-windiest month. For the whole year in context, see Jales's year-round climate.

Daytime high
31°
5th warmest
Overnight low
22°
11th coldest
Rainfall
210 mm
22.1 wet days
Daylight
13 h 12 min
6:42 AM – 7:55 PM
Cloud cover
72%
11th clearest
Wind
8 km/h
8th windiest
Solar energy
5.95 kWh/m²
Travel score
3.3
out of 10

Jales 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 31°C through the month.

A typical December day in Jales reaches about 31°C in the afternoon and slips back to 22°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 34°C. Set against its neighbours, December runs on par with November and on par with January.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13122
23122
33122
43122
53122
63122
73122
83122
93122
103122
113122
123122
133122
143122
153122
163122
173122
183122
193122
203122
213122
223122
233122
243122
253122
263122
273122
283122
293122
303122
313122

How December really feels in Jales

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.

Jales 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° / 22°24123.413.13.2
Feb31° / 22°18320.412.73.3
Mar30° / 22°16620.212.13.7
Apr30° / 20°649.111.55.2
May28° / 18°435.511.17.0
Jun28° / 17°202.510.87.7
Jul29° / 17°121.910.97.2
Aug31° / 18°172.211.35.8
Sep32° / 20°526.211.94.4
Oct32° / 22°10013.212.53.6
Nov31° / 22°15617.5133.5
Dec31° / 22°21022.113.23.3

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 70%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13367
23169
33070
43070
52773
62773
72773
82773
92773
102872
112872
122971
132971
143070
153070
163169
173169
183268
193268
203466
213466
223367
233367
243367
253169
263268
273169
283169
293070
302971
312971

Chance of precipitation in December

Any precipitation

Jales gets around 210 mm of rain over 22.1 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 (%)
169
270
370
471
572
672
772
873
973
1072
1172
1272
1372
1472
1571
1671
1771
1871
1970
2070
2170
2270
2370
2471
2571
2672
2772
2872
2973
3073
3173

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 64% of days. Sticky, muggy-or-worse air turns up on roughly 95% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
113103254
21393255
31383157
41273060
51273060
61262962
71262962
81162963
90152965
100153064
110153064
120053164
130053263
140053362
150043363
160043462
170043462
180043561
190043561
200033562
210033562
220033463
230033364
240023266
250023167
260023068
270022969
280022771
290022672
300022573
310022474

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
139calm
149calm
159calm
169calm
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 06 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 6 minutes over December. Sunrise moves from 6:38 AM to 6:49 AM, and sunset from 7:46 PM to 8:02 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.16:387:46
213.16:387:47
313.26:387:47
413.26:387:48
513.26:387:49
613.26:397:49
713.26:397:50
813.26:397:50
913.26:397:51
1013.26:407:52
1113.26:407:52
1213.26:407:53
1313.26:417:53
1413.26:417:54
1513.26:417:54
1613.26:427:55
1713.26:427:56
1813.26:437:56
1913.26:437:57
2013.26:437:57
2113.26:447:58
2213.26:447:58
2313.26:457:58
2413.26:457:59
2513.26:467:59
2613.26:468:00
2713.26:478:00
2813.26:478:01
2913.26:488:01
3013.26:488:01
3113.26:498:02

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.95 kWh/m².

For context, solar energy here swings from a low near 3.96 kWh/m² to a high of 6.16 kWh/m² in October across the year — December's 5.95 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.0Intense
26.0Bright
36.0Bright
45.9Bright
55.9Bright
65.9Bright
75.9Bright
85.9Bright
95.9Bright
105.9Bright
115.9Bright
125.9Bright
135.9Bright
145.9Bright
155.9Bright
165.9Bright
175.9Bright
186.0Bright
196.0Bright
206.0Bright
216.0Bright
226.0Bright
236.0Bright
246.0Bright
256.0Bright
266.0Bright
275.9Bright
285.9Bright
295.9Bright
305.9Bright
315.8Bright
Planning a trip in December

Hazard calendar for Jales

In seasonPeak

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

Jales'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 Jales?

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

3.3
Sightseeing
10th-best month of the year
4.8
Beach & pool
11th-best month of the year

December is a weaker month for outdoor sightseeing in Jales.

What to pack for Jales in December

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

In December, Jales sees daytime highs around 31°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 Jales 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 Jales peaks around January 23 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 21 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 23UV 15Jun 21UV 7
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar13Extreme
Apr11Extreme
May8Very high
Jun7High
Jul7High
Aug9Very high
Sep10Very high
Oct11Extreme
Nov13Extreme
Dec14Extreme

Air quality in Jales 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 Jales is worst in September — around 22 µg/m³ PM2.5 (moderate), about 3.5× the cleanest month (November, 6 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1721 µg/m³Nov 236 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb8Good
Mar8Good
Apr8Good
May8Good
Jun7Good
Jul7Good
Aug11Good
Sep22Moderate
Oct13Moderate
Nov6Good
Dec7Good
Location & terrain

Where is Jales?

Jales sits at 20.3°S, 50.5°W, 507 m above sea level, in Brazil. The nearest listed city is Fernandópolis, 31 km away.

Topography around Jales

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

Within 3 km, the terrain around Jales has only modest variations in elevation — a maximum elevation change of 132 m around an average of 475 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 196 m; within 80 km, only modest variations in elevation — a maximum elevation change of 243 m.

The land around Jales is covered by artificial surfaces (37%) and grassland (30%) within 3 km, cropland (42%) and grassland (39%) within 16 km, and cropland (44%) and grassland (35%) within 80 km.

3 km
132 m
16 km
196 m
80 km
243 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Fernandópolis 31 km · Santa Fé do Sul 40 km · Aparecida do Taboado 61 km · Votuporanga 62 km · Iturama 70 km · Pereira Barreto 72 km · Ilha Solteira 85 km · Paranaíba 94 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 Jales (-20.2689°, -50.5458°, elevation 507 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).