Graneros weather in December

In December, Graneros sees average daytime highs of 26°C and overnight lows near 12°C, with 11 mm of rain across 2.2 wet days and about 14.2 hours of daylight. It is the 3rd-warmest and 9th-wettest month of the year here.

Highs climb over the month, from about 24°C in the first days to 27°C by the end. The sky is clear or mostly clear about 81% of the time in December, and the air most often feels dry.

Daylight stretches from about 14 h 06 min at the start of December to 14 h 12 min by month's end. Set against the rest of the year, December is Graneros's 4th-clearest and 2nd-windiest month. For the whole year in context, see Graneros's year-round climate.

Daytime high
26°
3rd warmest
Overnight low
12°
10th coldest
Rainfall
11 mm
2.2 wet days
Daylight
14 h 18 min
6:31 AM – 8:47 PM
Cloud cover
20%
4th clearest
Wind
6 km/h
2nd windiest
Solar energy
8.8 kWh/m²
Travel score
8.8
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 24°C in the first days to 27°C by the end.

A typical December day in Graneros reaches about 26°C in the afternoon and slips back to 12°C overnight — a 13°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 29°C. Set against its neighbours, December runs about 3°C warmer than November and about 2°C cooler than January.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12411
22411
32411
42511
52511
62511
72511
82511
92512
102512
112512
122512
132512
142512
152612
162612
172613
182613
192613
202613
212613
222613
232613
242613
252613
262614
272714
282714
292714
302714
312714

Graneros weather by month

How December compares with the rest of the year at a glance. December is the 3rd-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan27° / 15°61.30148.7
Feb27° / 14°61.5013.38.7
Mar25° / 12°91.6012.39.0
Apr21° / 383.6011.27.9
May17° / 876.8010.36.1
Jun14° / 1498.50.39.84.4
Jul14° / 1138.50.4104.3
Aug15° / 998.20.510.75.0
Sep17° / 7490.211.85.9
Oct20° / 5480.112.96.8
Nov23° / 10°234.6013.88.3
Dec26° / 12°112.2014.28.8

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 81% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 9% of December, with mostly cloudy or overcast conditions the remaining 10%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
18515
28614
38614
48713
58713
68713
78812
88812
98812
108911
119010
129010
139010
14919
15919
16928
17928
18928
19928
20928
21928
22928
23928
24928
25928
26928
27928
28928
29928
30928
31928

Chance of precipitation in December

Any precipitation

Graneros gets around 11 mm of rain over 2.2 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 7% and peaks near 12% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%151015202531
Rain chance (%)
112
212
312
412
511
611
711
810
910
109
119
128
138
147
157
166
176
185
195
205
215
224
234
244
254
264
274
284
295
305
315

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the dry band about 91% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
19910
29910
39820
49820
59820
69730
79640
89550
99550
109460
119370
129280
139280
149190
1590100
1690100
1789110
1889110
1987121
2087121
2187121
2287121
2387121
2487121
2587121
2686131
2786131
2886131
2986131
3086131
3186131

Wind in December

Winds average 6 km/h in December.

Across December, daily wind ranges from about 6 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 14 h 06 min at the start of December to 14 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 6:29 AM to 6:39 AM, and sunset from 8:36 PM to 8:53 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.16:298:36
214.16:298:37
314.16:298:38
414.16:298:38
514.26:298:39
614.26:298:40
714.26:298:41
814.26:308:41
914.26:308:42
1014.26:308:43
1114.26:308:44
1214.26:308:44
1314.26:308:45
1414.26:318:46
1514.36:318:46
1614.36:318:47
1714.36:328:47
1814.36:328:48
1914.36:328:49
2014.36:338:49
2114.36:338:50
2214.36:348:50
2314.36:348:51
2414.36:358:51
2514.36:358:51
2614.36:368:52
2714.36:368:52
2814.36:378:52
2914.36:388:53
3014.26:388:53
3114.26:398:53

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 8.8 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.24 kWh/m² to a high of 8.8 kWh/m² in December across the year — December's 8.8 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
18.5Intense
28.5Intense
38.5Intense
48.6Intense
58.6Intense
68.6Intense
78.6Intense
88.6Intense
98.7Intense
108.7Intense
118.7Intense
128.7Intense
138.8Intense
148.8Intense
158.8Intense
168.8Intense
178.8Intense
188.8Intense
198.9Intense
208.9Intense
218.9Intense
228.9Intense
238.9Intense
248.9Intense
258.9Intense
269.0Intense
279.0Intense
289.0Intense
299.0Intense
309.0Intense
319.0Intense
Planning a trip in December

Hazard calendar for Graneros

In seasonPeak

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

Graneros's rainy season runs May–September, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is December a good time to visit Graneros?

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

8.8
Sightseeing
2nd-best month of the year
8.1
Beach & pool
3rd-best month of the year

December is one of the better times to visit Graneros for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Graneros in December

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

In December, Graneros sees daytime highs around 26°C and nights near 12°C. Pack sun protection. Worth having: light clothes.

sun protectionlight clothes

UV index in Graneros in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Graneros peaks around January 16 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near May 24 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeModerateVery highExtremeJan 16UV 13May 24UV 3
UV index (midday)Level
Jan13Extreme
Feb12Extreme
Mar10Very high
Apr5High
May3Moderate
Jun3Moderate
Jul3Moderate
Aug3Moderate
Sep6High
Oct9Very high
Nov11Extreme
Dec12Extreme

Air quality in Graneros 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 Graneros is worst in July — around 108 µg/m³ PM2.5 (unhealthy), about 3.9× the cleanest month (December, 28 µg/m³).

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

0306090120JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorUnhealthyPoorModerateJul 16107 µg/m³Dec 2128 µg/m³
PM2.5 (µg/m³)Level
Jan30Moderate
Feb31Moderate
Mar41Poor
Apr56Unhealthy
May80Unhealthy
Jun96Unhealthy
Jul108Unhealthy
Aug95Unhealthy
Sep78Unhealthy
Oct55Poor
Nov35Poor
Dec28Moderate
Location & terrain

Where is Graneros?

Graneros sits at 34.1°S, 70.7°W, 483 m above sea level, in Chile. The nearest listed city is Rancagua, 11 km away.

Topography around Graneros

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

Within 3 km, the terrain around Graneros has only modest variations in elevation — a maximum elevation change of 136 m around an average of 475 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,634 m; within 80 km, extreme variations in elevation — a maximum elevation change of 5,302 m.

The land around Graneros is covered by cropland (50%) and trees (25%) within 3 km, shrubs (30%), trees (24%) and cropland (22%) within 16 km, and bare terrain (24%) within 80 km.

3 km
136 m
16 km
1,634 m
80 km
5,302 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainsnow and icewater
December weather nearby: Rancagua 11 km · Machalí 14 km · Paine 29 km · Buin 37 km · Rengo 39 km · Talagante 49 km · El Monte 49 km · San Vicente 52 km

Chile travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / F / L
220 V · 50 Hz
Prices
≈ 48% of US
price level, 2025
GDP per capita
$17,995
2025
Happiness
6.3 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
6.3
per 100k, 2023
Road deaths
14.9
per 100k/yr, 2019
Income group
High
World Bank
English
Moderate
EF EPI 517
Religion
Catholic 57%none 26%Evangelical or Protestant 16%other Christians and traditions related to Christ 1%

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 Graneros (-34.0686°, -70.7275°, elevation 483 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).