December Weather in Osorno, Chile

Last updated: August 21, 2025

In December, Osorno, Chile, experiences a delightful blend of summer warmth and occasional rain. With maximum temperatures reaching 29°C (85°F) and an average of 14°C (58°F), the weather invites outdoor activities amidst the lush landscapes. However, the month also brings 53 mm (2.1 in) of rainfall over approximately 7 days, contributing to the region’s rich biodiversity. The humidity levels hover around 82%, enhancing the tropical feel of this picturesque locale. Perfect for those seeking to explore the stunning natural beauty, December in Osorno offers a refreshing balance of sunny days and refreshing showers.

December Temperature in Osorno

In December, Osorno, Chile, experiences a delightful transition into warmer weather, with average temperatures hovering around 14°C (58°F). The month kicks off with minimums of 3°C (38°F), and as the days progress, temperatures can soar to a pleasant maximum of 29°C (85°F). This marks a noticeable shift from the cooler climate of previous months, as seen in November's averages, giving a hint of the summer joys ahead. With such mild conditions, December is a wonderful time to explore the region’s stunning landscapes, making the most of the inviting warmth while enjoying long, sun-filled days.

December Weather in Osorno: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Osorno, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Osorno, December typically has an average temperature of {2}°C ({3}°F), with highs reaching up to {4}°C ({5}°F) and lows dropping to around {6}°C ({7}°F).
JanFebMarAprMayJunJulAugSepOctNovDec596156524845434547495457
Data source: Temperature data for Osorno generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Osorno

In December, Osorno, Chile, experiences a noticeable transition in its precipitation pattern as the year draws to a close. With an average of 53 mm (2.1 in) of rainfall over 7 days, the month serves as a prelude to the more substantial downpours seen in the following months, particularly May and June. This signifies a shift from the drier early months, with December's precipitation showing a marked decrease compared to the heavier rainfall in mid-year. As the landscape transitions, the combination of light but consistent rainfall helps maintain the lush vegetation that characterizes the region, setting the stage for a vibrant summer season ahead.

December Precipitation Trends in Osorno

The chart displays monthly precipitation patterns in Osorno, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Osorno, December typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec3128721051672521972381261218153
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Osorno

In December, Osorno, Chile, experiences a moderately humid climate, with humidity levels at 82%. As the year winds down, the atmosphere maintains a relatively consistent moisture level, following a gradual rise from earlier months. In the latter half of the year, humidity peaks in July and August at 87%, providing a lush environment that contrasts with the earlier months, where levels hovered around 79% to 81%. This steady increase in humidity culminates in a slight dip from November's 80%, illustrating a trend where December remains comfortably humid, ideal for the flourishing landscapes typical of southern Chile during this season.

December Average Humidity in Osorno

This chart illustrates the average monthly humidity levels in Osorno, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Osorno is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec81%80%79%84%86%86%87%87%85%83%80%82%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Osorno

December in Osorno, Chile, marks the continuation of the year’s most intense sun exposure, with a UV Index of 13 that falls within the extreme category. As the last month of the year approaches, residents and visitors alike should be vigilant, as the burn time is a mere 10 minutes. This trend mirrors the exceptionally high values seen in the earlier summer months, notably January and February, where UV ratings peak at 14 and 12 respectively. Following this intense period, UV levels gradually taper off as autumn sets in, with a noticeable decline in March and beyond. However, December serves as a strong reminder of the need for sun protection, as the intensity of UV radiation remains formidable. For further details on UV trends, visit Osorno UV Index.

Maximum UV Index Levels in Osorno for December

The chart shows the monthly maximum UV Index (UVI) for Osorno in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In December, the maximum UV index in Osorno typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec1412964235791213
Data source: Osorno December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

December Sunshine in Osorno

In Osorno, Chile, December shines brightly with 353 hours of glorious sunshine, marking it as the sunniest month of the year. This vibrant start to summer showcases a significant increase in daylight compared to the preceding months, particularly when juxtaposed with the dreary winter months of June and July, which bask in only 137 and 160 hours respectively. As the year progresses into spring, sunshine gradually increases, peaking in February with 310 hours, before tapering off in the cooler months of April and May. The steady rise in sunlight from late spring to early summer indicates a delightful transition, making December a perfect time for outdoor adventures and festive celebrations under the radiant sun.

Monthly Sunshine Duration in Osorno: December Highlighted

The December sunshine duration represents the total number of hours Osorno experiences direct sunlight during the month of December, excluding cloudy or obstructed periods. This chart compares the sunshine duration of December with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec291h310h307h225h185h137h160h180h241h281h304h353h
Data source: Osorno December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Osorno During December

In Osorno, Chile, December marks a notable shift in weather patterns, with a 65% chance of sunny days, making it one of the highlights of the year for sunlight enthusiasts. This solid probability comes on the heels of a gradual increase in sunshine, with the likelihood rising from a mere 24% in April to its December peak. As the year progresses from the cool and often cloudy months, such as June and July, where sun chances dip to around 26%, December brings a welcome brightness that rivals early summer months. This trend not only sets December apart but also hints at a promising transition into the vibrant summer ahead, making it an ideal time for outdoor activities and enjoying the natural beauty of the region.

Percentage of Sunny Days in December in Osorno

The chart illustrates the percentage of sunny days in Osorno throughout the year, with December highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Osorno experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec64%77%60%24%27%33%26%26%38%40%42%65%
Data source: Osorno December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Osorno in December

In Osorno, Chile, daylight duration dramatically shifts throughout the year, peaking in December with a generous 15 hours of sunlight. This month stands out as a beacon of brightness, marking a clear transition from the shorter days of winter. As the year progresses from the depths of June, where daylight languishes at 9 hours, we see an uplifting ascent toward mid-summer. The gradual lengthening of days in spring and the return to 14 hours in November set the stage for this sunny climax. The trend poignantly reflects the Southern Hemisphere’s seasonal rhythm, inviting both locals and visitors to revel in the vibrant daylight of the summer season.

Average Daylight Hours in Osorno for December

The chart illustrates the variation in daylight duration in Osorno throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec14h 40m13h 36m12h 17m10h 56m9h 50m9h 17m9h 35m10h 34m11h 50m13h 11m14h 23m15h
Data source: Osorno daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Osorno

As the year winds down, December in Osorno, Chile brings a familiar breeze, with average wind speeds reaching 3.3 m/s (7 mph)—matching the earlier gusts of January. This refreshing end-of-year wind reflects a notable trend: the latter months of the year tend to experience a mild revival in wind speeds after a gradual dip through the autumn. Notably, the winds increase slightly in August, hinting at seasonal shifts, before settling again in late fall. December, with its steady gusts, encourages residents and visitors alike to revel in the invigorating air, setting the perfect stage for the warm summer days ahead.

Average December Wind Speed in Osorno

The chart displays monthly wind speed patterns in Osorno, with values for each month shown alongside December's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how December's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec3.33.02.82.42.82.92.53.42.52.92.83.3 m/s
Data source: Osorno December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Osorno Compares to Other Months

Weather in Osorno varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Osorno, focusing on differences in temperature, rainfall, humidity, and UV levels.

In December, the weather features a minimum temperature of 3°C (38°F) and an average high of 29°C (85°F), with overall humidity at 82% and precipitation totaling 53 mm over about 7 days. In contrast, January sees a similar minimum temperature of 3°C (37°F), but the average high increases to 32°C (90°F), resulting in slightly less precipitation of 31 mm over just 5 days, with humidity dropping slightly to 81%. This transition marks a shift towards warmer and drier conditions in January. For more specifics on January's weather in Osorno, check out Osorno weather in January.

In December, the weather features a minimum temperature of 3°C (38°F) and an average of 14°C (58°F), with maximum temperatures reaching up to 29°C (85°F). This month experiences around 53 mm (2.1 in) of precipitation over approximately 7 days and maintains a humidity level of 82%. In contrast, February sees slightly warmer conditions, with an average temperature of 16°C (61°F) and maximums soaring to 36°C (98°F). Precipitation is much lower, at 28 mm (1.1 in) over just 3 days, and humidity drops slightly to 80%. For more detailed insights on February's climate, you can check Osorno weather in February.

December and March present similar temperature ranges, with December averaging 14°C (58°F) and March at 13°C (56°F). Both months experience mild conditions, with maximum temperatures reaching 29°C (85°F) in December and slightly lower at 28°C (83°F) in March. However, March sees more precipitation, with 72 mm (2.8 in) compared to December's 53 mm (2.1 in), despite both months having rain on about 7 days. Humidity levels are fairly close, with December at 82% and March slightly lower at 79%. For more detailed insights into Osorno's climate during March, you can visit Osorno weather in March.

When comparing the weather in December and April, December boasts milder temperatures, with a minimum of 3°C and an average of 14°C, peaking at 29°C. In contrast, April experiences cooler conditions, starting with a minimum of -1°C and averaging 11°C, reaching a maximum of 24°C. Precipitation is higher in April, totaling 105 mm over 12 days, compared to December's 53 mm over 7 days. Additionally, both months have similar humidity levels, with December at 82% and April slightly higher at 84%. For more detailed information about April weather, you can visit Osorno weather in April.

The weather in December is generally warmer compared to May, with temperatures ranging from a minimum of 3°C (38°F) to a maximum of 29°C (85°F), while May sees cooler temperatures between -2°C (28°F) and 20°C (68°F). Additionally, December experiences lower precipitation levels, averaging 53 mm (2.1 in) over 7 days, in contrast to May's significantly higher rainfall of 167 mm (6.6 in) spread over 17 days. Humidity levels are quite similar, with December at 82% and May slightly higher at 86%. For a detailed look at the weather patterns in May, you can refer to Osorno weather in May.

December weather in Osorno can be characterized by milder temperatures, with a minimum of 3°C (38°F) and an average high reaching up to 29°C (85°F). The month sees relatively low precipitation at 53 mm (2.1 in) over about 7 days, accompanied by a humidity level of 82%. In contrast, June brings a notable drop in temperatures, with lows reaching -4°C (25°F) and highs averaging only 15°C (59°F). Additionally, June is significantly wetter, with precipitation totaling 252 mm (9.9 in) across 21 days, and higher humidity at 86%. For more insights on Osorno's June weather, visit Osorno weather in June.

The weather in December is notably warmer than in July, with temperatures averaging 14°C (58°F) compared to just 6°C (44°F) in July. December also experiences higher maximum temperatures, reaching up to 29°C (85°F), while July peaks at only 14°C (58°F). However, July is significantly wetter, with total precipitation of 197 mm (7.7 in) spread over 18 days, whereas December sees only 53 mm (2.1 in) over 7 days. Humidity levels are slightly higher in July at 87%, compared to 82% in December, which may contribute to a cooler feeling during that month. For more detailed information, you can check Osorno weather in July.

December and August present contrasting weather patterns. In December, temperatures range from a mild 3°C (38°F) to a warm 29°C (85°F), with an average of 14°C (58°F), and relatively low precipitation of 53 mm (2.1 in) over just 7 days, resulting in a humidity level of 82%. In stark contrast, August experiences much cooler temperatures, with a minimum of -2°C (28°F) and a maximum of 16°C (61°F), averaging around 7°C (45°F). This month sees significantly more rainfall, totaling 238 mm (9.4 in) spread over 20 days, contributing to a higher humidity of 87%. For a more detailed look into Osorno's weather during August, check out Osorno weather in August.

In December, the weather is generally warmer than in September, with temperatures ranging from a minimum of 3°C (38°F) to a maximum of 29°C (85°F), while September sees cooler temperatures, with a minimum of -2°C (30°F) and a maximum of 21°C (69°F). December also has less precipitation, with 53 mm (2.1 in) falling over 7 days, compared to September's 126 mm (5.0 in) over 13 days, making December drier overall. The humidity levels are quite similar, with December at 82% and September slightly higher at 85%. For a more detailed look at September's weather, you can check Osorno weather in September.

When comparing the weather in December and October, there are several notable differences. December boasts milder temperatures, with a minimum of 3°C (38°F) and a comfortable average of 14°C (58°F), soaring up to a maximum of 29°C (85°F). In contrast, October experiences cooler temperatures, ranging from a chilly -1°C (31°F) to a maximum of 23°C (73°F), with an average of 10°C (49°F). Precipitation levels also vary significantly; October sees a substantial 121 mm (4.8 in) of rain over 14 days, while December is relatively drier with only 53 mm (2.1 in) of rain across 7 days. Humidity remains similar, with October at 83% and December at 82%. For more details about weather conditions in October, you can visit Osorno weather in October.

In comparing the weather between December and November, December experiences slightly warmer temperatures with a minimum of 3°C and an average of 14°C, reaching a maximum of 29°C, while November's temperatures range from a minimum of 1°C to a maximum of 25°C, averaging 12°C. December also sees reduced precipitation, totaling 53 mm over 7 days, compared to November’s 81 mm spread over 10 days. Humidity levels are fairly similar, with December at 82% and November at 80%. For more details on November weather, you can check out Osorno weather in November.

Compare Osorno's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in Osorno

As December arrives in Osorno, the weather transforms into a refreshing blend of warmth and humidity, marking a distinct departure from the cooler months. While temperatures can reach a pleasant 29°C (85°F), the average sits at a comfortable 14°C (58°F), making it an ideal time for outdoor activities. Though the city experiences some rain with 53 mm (2.1 in) spread over 7 days, the lush landscapes thrive under the combination of warmth and moisture. This month heralds the onset of summer, creating a vibrant atmosphere that captivates both locals and visitors alike. For a deeper dive into the climatic nuances of this beautiful region, take a look at our complete guide on Osorno Climate.