Rengo weather in December

In December, Rengo sees average daytime highs of 23°C and overnight lows near 9°C, with 19 mm of precipitation across 3.8 wet days and about 14.3 hours of daylight. It is the 3rd-warmest and 9th-wettest month of the year here.

Highs climb over the month, from about 21°C in the first days to 24°C by the end. The sky is clear or mostly clear about 78% 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 18 min by month's end. Set against the rest of the year, December is Rengo's 4th-clearest and 1st-windiest month. For the whole year in context, see Rengo's year-round climate.

Daytime high
23°
3rd warmest
Overnight low
10th coldest
Precipitation
19 mm
3.8 wet days
Daylight
14 h 18 min
6:31 AM – 8:48 PM
Cloud cover
22%
4th clearest
Wind
5 km/h
1st windiest
Solar energy
8.83 kWh/m²
Travel score
8.5
out of 10

Rengo is municipality in Chile.

Air quality
Elevated
PM2.5 23.8 µg/m³ · 2019

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

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 21°C in the first days to 24°C by the end.

A typical December day in Rengo reaches about 23°C in the afternoon and slips back to 9°C overnight — a 13°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 26°C. Set against its neighbours, December runs about 3°C warmer than November and about 2°C cooler than January.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
1218
2218
3218
4228
5228
6228
7228
8228
9228
10229
11229
12229
13229
14229
15229
16239
17239
18239
19239
202310
212310
222310
232310
242310
252310
262310
272310
282410
292410
302411
312411

How December really feels in Rengo

Once humidity and wind are folded in, December averages 0 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
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

December sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Rengo 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
Jan24° / 11°102.20149.2
Feb24° / 11°112.3013.39.1
Mar22° / 142.4012.38.7
Apr18° / 574.70.411.27.0
May15° / 12782.110.24.7
Jun11° / 20910.65.69.72.6
Jul10° / -0°1479.769.92.5
Aug12° / 1238.75.210.73.3
Sep14° / 848.92.911.84.3
Oct17° / 598.71.712.95.8
Nov20° / 356.90.313.87.2
Dec23° / 193.80.114.38.5

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 78% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 10% of December, with mostly cloudy or overcast conditions the remaining 11%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
18317
28515
38515
48515
58515
68515
78614
88614
98713
108812
118812
128812
139010
149010
159010
169010
179010
18919
19919
20919
21919
22919
23919
24919
25919
26919
27919
28919
29928
30928
31928

Chance of precipitation in December

Any precipitation

Rengo gets around 19 mm of rain and snow over 3.8 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 12% and peaks near 17% on the wettest days, and about 0 day brings snow. The odds ease toward the end of the month.

0%10%20%30%151015202531
Rain chance (%)
117
217
316
416
516
615
715
815
914
1014
1113
1213
1313
1412
1512
1611
1711
1811
1910
2010
2110
2210
2310
2410
2510
2610
2710
2810
2910
3010
319

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 98% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
11000
21000
31000
41000
51000
61000
71000
81000
9991
10991
11991
12991
13991
14982
15982
16982
17973
18973
19973
20964
21964
22964
23955
24955
25955
26955
27955
28955
29955
30955
31955

Wind in December

Winds average 5 km/h in December, the windiest month of the year.

Across December, daily wind ranges from about 5 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 14 h 06 min at the start of December to 14 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 12 minutes over December. Sunrise moves from 6:29 AM to 6:38 AM, and sunset from 8:37 PM to 8:55 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.16:298:37
214.16:298:38
314.26:298:39
414.26:298:40
514.26:298:40
614.26:298:41
714.26:298:42
814.26:298:43
914.26:298:44
1014.26:298:44
1114.36:308:45
1214.36:308:46
1314.36:308:46
1414.36:308:47
1514.36:318:48
1614.36:318:48
1714.36:318:49
1814.36:328:49
1914.36:328:50
2014.36:328:51
2114.36:338:51
2214.36:338:51
2314.36:348:52
2414.36:348:52
2514.36:358:53
2614.36:358:53
2714.36:368:54
2814.36:378:54
2914.36:378:54
3014.36:388:54
3114.36:388:55

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 8.83 kWh/m².

For context, solar energy here swings from a low near 2.19 kWh/m² to a high of 8.84 kWh/m² in January across the year — December's 8.83 kWh/m² sits near the top of that range.

0246810151015202531
Solar energy (kWh/m²)Level
18.5Intense
28.5Intense
38.6Intense
48.6Intense
58.6Intense
68.6Intense
78.6Intense
88.7Intense
98.7Intense
108.7Intense
118.7Intense
128.8Intense
138.8Intense
148.8Intense
158.8Intense
168.8Intense
178.8Intense
188.9Intense
198.9Intense
208.9Intense
218.9Intense
228.9Intense
239.0Intense
249.0Intense
259.0Intense
269.0Intense
279.0Intense
289.0Intense
299.0Intense
309.0Intense
319.0Intense
Planning a trip in December

Hazard calendar for Rengo

In seasonPeak

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

Rengo's rainy season runs May–August, 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 Rengo?

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

8.5
Sightseeing
4th-best month of the year
6.2
Beach & pool
3rd-best month of the year

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

What to pack for Rengo in December

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

In December, Rengo sees daytime highs around 23°C and nights near 9°C. Pack sun protection. Worth having: light clothes. About 4 days see rain.

sun protectionlight clothes

UV index in Rengo 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 Rengo peaks around January 17 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 17UV 13May 24UV 3
UV index (midday)Level
Jan13Extreme
Feb13Extreme
Mar10Very high
Apr5High
May3Moderate
Jun3Moderate
Jul3Moderate
Aug3Moderate
Sep6High
Oct9Very high
Nov11Extreme
Dec12Extreme

Air quality in Rengo 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 Rengo is worst in July — around 32 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (December, 16 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Rengo's WHO annual average of 23.8 µg/m³.

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateJul 1832 µg/m³Dec 1216 µg/m³
PM2.5 (µg/m³)Level
Jan20Moderate
Feb17Moderate
Mar17Moderate
Apr23Moderate
May31Moderate
Jun31Moderate
Jul32Moderate
Aug31Moderate
Sep29Moderate
Oct22Moderate
Nov17Moderate
Dec16Moderate
Location & terrain

Where is Rengo?

Rengo sits at 34.4°S, 70.9°W, 326 m above sea level, in Chile. The nearest listed city is San Vicente de Tagua Tagua, 20 km away.

Topography around Rengo

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

Within 3 km, the terrain around Rengo has only modest variations in elevation — a maximum elevation change of 96 m around an average of 320 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,632 m; within 80 km, extreme variations in elevation — a maximum elevation change of 5,128 m.

The land around Rengo is covered by cropland (41%), trees (24%) and artificial surfaces (22%) within 3 km, cropland (34%), trees (28%) and shrubs (23%) within 16 km, and trees (23%), bare terrain (22%) and grassland (20%) within 80 km.

3 km
96 m
16 km
1,632 m
80 km
5,128 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainsnow and icewater
December weather nearby: San Vicente de Tagua Tagua 20 km · San Vicente 21 km · Rancagua 29 km · Machalí 32 km · Chimbarongo 38 km · Graneros 39 km · Santa Cruz 53 km · Paine 67 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 Rengo (-34.4064°, -70.8583°, elevation 326 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).