Olavarría weather in December

In December, Olavarría sees average daytime highs of 26°C and overnight lows near 14°C, with 80 mm of rain across 8.6 wet days and about 14.5 hours of daylight. It is the 2nd-warmest and 6th-wettest month of the year here.

Highs climb over the month, from about 25°C in the first days to 28°C by the end. The sky is clear or mostly clear about 53% of the time in December, and the air most often feels dry.

Daylight stretches from about 14 h 18 min at the start of December to 14 h 30 min by month's end. Set against the rest of the year, December is Olavarría's 2nd-clearest and 1st-windiest month. For the whole year in context, see Olavarría's year-round climate.

Daytime high
26°
2nd warmest
Overnight low
14°
10th coldest
Rainfall
80 mm
8.6 wet days
Daylight
14 h 30 min
5:42 AM – 8:13 PM
Cloud cover
41%
2nd clearest
Wind
15 km/h
1st windiest
Solar energy
7.63 kWh/m²
Travel score
7.1
out of 10

Olavarría is city in Buenos Aires province, Argentina.

Density
3,738/km²
people per km²
Founded
1867

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 25°C in the first days to 28°C by the end.

A typical December day in Olavarría reaches about 26°C in the afternoon and slips back to 14°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 31°C. Set against its neighbours, December runs about 3°C warmer than November and about 1°C cooler than January.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
12512
22512
32512
42512
52512
62512
72513
82613
92613
102613
112613
122613
132613
142613
152613
162714
172714
182714
192714
202714
212714
222714
232714
242715
252815
262815
272815
282815
292815
302815
312815

How December really feels in Olavarría

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.

Olavarría weather by month

How December compares with the rest of the year at a glance. December is the 2nd-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 15°929.314.26.8
Feb26° / 15°757.813.47.1
Mar24° / 13°81812.37.4
Apr20° / 10°857.811.16.7
May16° / 475.710.15.6
Jun13° / 374.69.54.0
Jul12° / 385.29.73.6
Aug15° / 54510.64.9
Sep17° / 626.811.75.7
Oct20° / 909.2136.4
Nov23° / 11°948.9147.2
Dec26° / 14°808.614.57.1

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 53% 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 32%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16733
26733
36733
46733
56733
66733
76733
86733
96733
106832
116832
126832
136832
146832
156832
166832
177030
187030
197030
207030
217030
227129
237129
247030
256931
266931
276832
286832
296733
306733
316634

Chance of precipitation in December

Any precipitation

Olavarría gets around 80 mm of rain over 8.6 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 28% and peaks near 28% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
128
228
328
428
528
628
728
828
928
1028
1128
1228
1328
1428
1528
1628
1728
1828
1928
2028
2128
2228
2328
2428
2528
2628
2728
2828
2928
3028
3128

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 57% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1672391
2682291
3682291
46722101
56722101
66722101
76722101
86623101
96523111
106523111
116523111
126424111
136324121
146125122
156125122
166025132
175826142
185626153
195526163
205426164
215226175
225126185
234926196
244726207
254626208
264526218
274426219
284226229
2942262210
3041262310
3141262310

Wind in December

Winds average 15 km/h in December, the windiest month of the year.

Across December, daily wind ranges from about 14 km/h on the calmest days to 15 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
115light breeze
215light breeze
315light breeze
415light breeze
515light breeze
615light breeze
715light breeze
815light breeze
915light breeze
1015light breeze
1115light breeze
1215light breeze
1315light breeze
1415light breeze
1515light breeze
1615light breeze
1715light breeze
1815light breeze
1915light breeze
2015light breeze
2115light breeze
2215light breeze
2315light breeze
2415light breeze
2515light breeze
2615light breeze
2714light breeze
2814light breeze
2914light breeze
3014light breeze
3114light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 14 h 18 min at the start of December to 14 h 30 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 5:41 AM to 5:50 AM, and sunset from 8:01 PM to 8:19 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.35:418:01
214.45:418:02
314.45:408:03
414.45:408:04
514.45:408:05
614.45:408:06
714.45:408:07
814.45:408:07
914.55:418:08
1014.55:418:09
1114.55:418:10
1214.55:418:10
1314.55:418:11
1414.55:418:12
1514.55:428:12
1614.55:428:13
1714.55:428:14
1814.55:438:14
1914.55:438:15
2014.55:438:15
2114.55:448:16
2214.55:448:16
2314.55:458:17
2414.55:458:17
2514.55:468:18
2614.55:468:18
2714.55:478:18
2814.55:488:19
2914.55:488:19
3014.55:498:19
3114.55:508:19

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 7.63 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.06 kWh/m² to a high of 7.63 kWh/m² in December across the year — December's 7.63 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
17.4Intense
27.4Intense
37.5Intense
47.5Intense
57.5Intense
67.5Intense
77.5Intense
87.5Intense
97.6Intense
107.6Intense
117.6Intense
127.6Intense
137.6Intense
147.6Intense
157.6Intense
167.6Intense
177.6Intense
187.7Intense
197.7Intense
207.7Intense
217.7Intense
227.7Intense
237.7Intense
247.7Intense
257.7Intense
267.7Intense
277.6Intense
287.6Intense
297.6Intense
307.6Intense
317.6Intense
Planning a trip in December

Is December a good time to visit Olavarría?

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

7.1
Sightseeing
3rd-best month of the year
7.0
Beach & pool
2nd-best month of the year

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

What to pack for Olavarría in December

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

In December, Olavarría sees daytime highs around 26°C and nights near 14°C. Pack sun protection. Worth having: light clothes and rain gear. About 9 days see rain.

sun protectionlight clothesrain gear

UV index in Olavarría in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Olavarría peaks around January 1 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 at about 2 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateHighVery highExtremeJan 1UV 13Jun 20UV 2
UV index (midday)Level
Jan13Extreme
Feb11Extreme
Mar9Very high
Apr6High
May3Moderate
Jun2Moderate
Jul3Moderate
Aug3Moderate
Sep5High
Oct8Very high
Nov10Extreme
Dec13Extreme
Location & terrain

Where is Olavarría?

Olavarría sits at 36.9°S, 60.3°W, 163 m above sea level, in Argentina. The nearest listed city is Azul, 43 km away.

Topography around Olavarría

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

Within 3 km, the terrain around Olavarría has only modest variations in elevation — a maximum elevation change of 24 m around an average of 164 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 181 m; within 80 km, significant variations in elevation — a maximum elevation change of 292 m.

The land around Olavarría is covered by artificial surfaces (56%) and grassland (34%) within 3 km, grassland (58%) and cropland (36%) within 16 km, and grassland (67%) and cropland (32%) within 80 km.

3 km
24 m
16 km
181 m
80 km
292 m
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Azul 43 km · Benito Juárez 98 km · San Carlos de Bolívar 102 km · Tandil 116 km · Las Flores 147 km · Saladillo 148 km · Coronel Pringles 152 km · Coronel Suárez 156 km

Argentina travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / I
220 V · 50 Hz
Prices
≈ 46% of US
price level, 2025
GDP per capita
$14,898
2025
Happiness
6.4 / 10
World Happiness, 2025
Homicide rate
4.5
per 100k, 2023
Road deaths
14.1
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
High
EF EPI 575
Religion
Roman Catholic 63%none 19%Evangelical 15%Jehovah's Witness and Church of Jesus 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 Olavarría (-36.8938°, -60.3232°, elevation 163 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).