December Weather in Valparaiso, Chile

Last updated: August 21, 2025

December in Valparaíso, Chile offers a delightful coastal escape, featuring maximum temperatures around 17°C (63°F) and a comfortable average of 15°C (58°F). With minimum temperatures seldom dropping below 12°C (54°F), the weather remains pleasantly mild. Remarkably, this month experiences almost no rainfall, totaling just 3 mm (0.1 in), ensuring plenty of sunny days for outdoor exploration. Humidity is also moderate at 39%, allowing for a refreshing yet warm atmosphere, making December an ideal time to enjoy the vibrant city and its stunning seaside views.

December Temperature in Valparaiso

In December, Valparaíso begins to embrace the vibrant warmth of summer, with temperatures gently rising. The month showcases a pleasant minimum of 12°C (54°F), with an average hovering around 15°C (58°F), peaking at a comfortable 17°C (63°F). This slight upward trend from November foreshadows the warmer months ahead, inviting both locals and tourists to enjoy outdoor adventures and the stunning coastal scenery. As the city transitions into its summer phase, the mild temperatures and extended daylight make December an ideal time to revel in Valparaíso's unique charm.

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

The chart illustrates December temperature patterns in Valparaiso, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Valparaiso, 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).
JanFebMarAprMayJunJulAugSepOctNovDec606160585655545354545658
Data source: Temperature data for Valparaiso 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 Valparaiso

December in Valparaiso, Chile, marks a continuation of the region's dry summer pattern, with only 3 mm (0.1 in) of precipitation recorded across the month and no rainfall days to speak of. This minimal rainfall underscores a clear trend of diminishing precipitation as the year comes to a close, a stark contrast to the rainy winter months that follow. Notably, December joins a handful of months like January and November, where the lack of significant rain not only highlights the city's seasonal drought but also enhances its sunny, pleasant climate, making it a perfect time for outdoor activities. The dry conditions pave the way for the bustling festive atmosphere of the holiday season, as residents and visitors enjoy the vibrant culture of Valparaiso under mostly clear skies.

December Precipitation Trends in Valparaiso

The chart displays monthly precipitation patterns in Valparaiso, 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 Valparaiso, December typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec6659501164741151253
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Valparaiso

In December, Valparaiso, Chile, experiences a relatively low humidity level of 39%, marking a decline from the higher averages seen in the latter months of the year. This drop contrasts sharply with the peak humidity levels of 75% reached in July, highlighting a significant seasonal fluctuation. As the year transitions from the wetter winter months of June and July, with humidity exceeding 70%, December breathes a sigh of relief with its drier atmosphere, similar to the conditions of January and February. Overall, the trend illustrates a gradual increase in humidity from the summer months into the spring, peaking mid-year, before descending again, creating a dynamic climate that offers a refreshing change as the year draws to a close.

December Average Humidity in Valparaiso

This chart illustrates the average monthly humidity levels in Valparaiso, 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 Valparaiso is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec41%41%46%52%64%71%75%73%56%61%52%39%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Valparaiso

In December, Valparaiso experiences its peak UV Index of 14, falling into the extreme exposure category with a burn time of just 10 minutes. This intensity continues the trend established in January and February, where values soared to 14 and 12, respectively, marking winter months as the most hazardous for sun exposure. As the year progresses towards April, the UV Index dips to 8, indicating a transition toward very high risk levels with slightly longer burn times. Conversely, late fall months bring milder UV readings, notably in May and June, where the index stabilizes around 5 to 4, classified as moderate. This pattern emphasizes the necessity of vigilant sun protection, particularly during the high summer months. For further insights, visit Valparaiso UV Index.

Maximum UV Index Levels in Valparaiso for December

The chart shows the monthly maximum UV Index (UVI) for Valparaiso 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 Valparaiso typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec141211854468111214
Data source: Valparaiso 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 Valparaiso

In December, the charm of Valparaiso, Chile, shines brightest with a delightful 401 hours of sunshine, marking it as one of the sunniest months of the year. This vibrant coastal city basks in increasing daylight as the year draws to a close, showcasing a remarkable rise in sunshine from the previous months. The trend is clear: as summer approaches in the Southern Hemisphere, daylight flourishes, with December's hours standing in stark contrast to the gray of late autumn and winter, where May recorded just 264 hours and June a mere 236 hours. As visitors and locals alike relish the radiant warmth, Valparaiso's picturesque hills and colorful architecture come alive, making this month an ideal time to soak up the sun and embrace the city's festive spirit.

Monthly Sunshine Duration in Valparaiso: December Highlighted

The December sunshine duration represents the total number of hours Valparaiso 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.
JanFebMarAprMayJunJulAugSepOctNovDec321h342h353h303h264h236h268h296h315h363h378h401h
Data source: Valparaiso December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Valparaiso During December

In December, Valparaiso, Chile enjoys a 61% chance of sunny weather, marking a slight uptick from the preceding months. This trend reflects the city's gradual transition into summer, where sunshine becomes more prevalent following the cooler, cloudier autumn months. Notably, December offers a favorable balance of warmth and light, as the likelihood of sunny days aligns closely with the optimistic patterns established in November at 59%. This positioning is part of a broader upward trajectory, with the sunniest months just ahead in January and February, both boasting a solid 59% chance of sun, ensuring that Valparaiso is poised for a vibrant start to its summer season.

Percentage of Sunny Days in December in Valparaiso

The chart illustrates the percentage of sunny days in Valparaiso 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 Valparaiso experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec59%59%65%62%53%42%60%52%70%77%59%62%
Data source: Valparaiso December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Valparaiso in December

In December, Valparaíso, Chile basks in 14 hours of daylight, marking the peak of the southern hemisphere’s summer. This vibrant month follows a gradual increase from 11 hours in April, reflecting a trend of lengthening days that begins as winter recedes. As the year progresses from December to February, daylight diminishes to 13 hours, establishing a pattern of moderately decreasing light as autumn approaches. The city's daylight duration ebbs and flows with the seasons, providing a delightful rhythm that enhances its coastal charm, making it a perfect time for outdoor activities and exploration under the sun.

Average Daylight Hours in Valparaiso for December

The chart illustrates the variation in daylight duration in Valparaiso throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec14h 1m13h 14m12h 14m11h 13m10h 23m9h 59m10h 12m10h 56m11h 54m12h 55m13h 49m14h 16m
Data source: Valparaiso daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Valparaiso

As December rolls into Valparaiso, the city experiences an average wind speed of 5.0 m/s (11 mph), which marks a slight drop from the brisker gusts of the preceding months. The transition from October's 6.3 m/s (14 mph) winds signals a gradual easing, hinting at the shift toward summer breezes. Interestingly, the winds tend to peak in early spring and late autumn, with September also boasting a notable 5.9 m/s (13 mph). This consistent cycle highlights Valparaiso's dynamic climate, where the December winds offer a refreshing respite while still carrying the warmth of summer on the horizon.

Average December Wind Speed in Valparaiso

The chart displays monthly wind speed patterns in Valparaiso, 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.
JanFebMarAprMayJunJulAugSepOctNovDec5.14.64.24.95.45.35.44.45.96.35.85.0 m/s
Data source: Valparaiso December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Valparaiso Compares to Other Months

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

December weather in the region typically features mild temperatures, with a minimum of 12°C (54°F) and an average of 15°C (58°F) peaking at 17°C (63°F). It experiences minimal precipitation, registering only 3 mm (0.1 in) across the month, while humidity levels hover around 39%. In contrast, January sees a slight increase in temperatures, with minimums of 13°C (55°F) and averages reaching 16°C (60°F), topping out at 19°C (66°F). January also has higher precipitation at 6 mm (0.2 in), although it continues to enjoy dry days and a modest increase in humidity to 41%. For more detailed insights on January weather, you can check this link: Valparaiso weather in January.

In December, the weather tends to be mild with average temperatures ranging from a minimum of 12°C (54°F) to a maximum of 17°C (63°F). The precipitation is low at just 3 mm (0.1 in) and with no rainy days, humidity levels average around 39%. In contrast, February experiences slightly warmer temperatures, with a minimum of 14°C (58°F) and a maximum of 19°C (66°F), alongside a bit more rainfall at 6 mm (0.2 in), though it also sees no rainy days. Humidity is marginally higher in February at 41%. For more detailed information on the February weather, you can check out Valparaiso weather in February.

In December, the weather generally features mild temperatures with a minimum of 12°C (54°F), and the average temperature hovers around 15°C (58°F). The maximum temperature reaches about 17°C (63°F), complemented by low humidity levels at 39% and minimal precipitation of just 3 mm (0.1 in). In contrast, March experiences slightly warmer conditions, where the average temperature rises to 15°C (60°F), peaking at a maximum of 19°C (67°F). Humidity also increases to 46%, and the precipitation, though still minimal, is slightly higher at 5 mm (0.2 in). For more detailed insights into the weather during this month, you can refer to Valparaiso weather in March.

When comparing the weather in December and April, notable similarities and differences emerge. Both months experience mild temperatures, with December averaging around 15°C (58°F) and April slightly cooler at 14°C (58°F). The maximum temperatures are quite similar as well, peaking at 17°C (63°F) in December and 17°C (64°F) in April. However, December boasts a much drier climate, with no recorded precipitation, while April sees a slight increase in rainfall, totaling 9 mm (0.4 in) over one day. Additionally, humidity levels are higher in April at 52%, compared to December’s 39%, contributing to a feeling of increased moisture in the air. For a deeper insight into April’s weather specifics, you can visit Valparaiso weather in April.

In December, temperatures in Valparaiso typically range from a minimum of 12°C (54°F) to a maximum of 17°C (63°F), with a comfortable average of 15°C (58°F). This month boasts dry conditions, with only 3 mm of precipitation recorded and minimal humidity at 39%. In contrast, May experiences slightly cooler temperatures, with averages hovering around 14°C (57°F) and a maximum temperature reaching 17°C (63°F). However, it is considerably wetter, receiving about 50 mm (2.0 in) of rainfall over 3 days and a higher humidity level at 64%. For more detailed information, you can check Valparaiso weather in May.

December weather is relatively mild, with temperatures ranging from a minimum of 12°C (54°F) to a maximum of 17°C (63°F), and an average of 15°C (58°F). Additionally, December experiences very little precipitation, just 3 mm (0.1 in) across the month, resulting in low humidity at 39%. In contrast, June temperatures are cooler, with a minimum of 9°C (48°F) and a maximum of 16°C (61°F), averaging at 13°C (55°F). Furthermore, June is characterized by significantly higher rainfall, totaling 116 mm (4.6 in) over approximately 8 days, leading to a higher humidity level of 71%. For more specific details, you can check Valparaiso weather in June.

In December, the weather tends to be milder, with average temperatures ranging from a minimum of 12°C (54°F) to a maximum of 17°C (63°F) and minimal precipitation of just 3 mm (0.1 in) across no rainy days and a humidity level of 39%. In contrast, July experiences cooler temperatures, with an average ranging from 8°C (47°F) to 16°C (61°F), significant precipitation of 47 mm (1.9 in) over 4 rainy days, and much higher humidity at 75%. This stark contrast highlights December's drier and warmer conditions compared to the cooler and wetter July weather. For more details, you can check Valparaiso weather in July.

The weather in December is significantly milder than in August, with temperatures ranging from a minimum of 12°C (54°F) to a maximum of 17°C (63°F). In contrast, August experiences cooler temperatures, with lows of 8°C (47°F) and highs of only 14°C (58°F). Additionally, December boasts a dry climate with no recorded precipitation, while August sees considerably higher rainfall of 41 mm (1.6 in) over four days, contributing to a much higher humidity level of 73%. For more detailed information on August weather, you can visit Valparaiso weather in August.

Comparing the weather in December and September reveals some notable differences. December features milder temperatures, with averages ranging from a minimum of 12°C (54°F) to a maximum of 17°C (63°F), while September experiences slightly cooler conditions, with temperatures ranging from 10°C (50°F) to 15°C (60°F). Additionally, December has lower precipitation, recording only 3 mm (0.1 in) over no rainy days, in stark contrast to September, which sees 15 mm (0.6 in) spread over two days. Humidity levels also fluctuate, with December at 39% compared to September's higher 56%. For more specific insights, you can check Valparaiso weather in September.

In comparing the weather between December and October, December tends to be slightly warmer, with average temperatures ranging from a minimum of 12°C (54°F) to a maximum of 17°C (63°F), whereas October has cooler temperatures averaging between 10°C (50°F) and 15°C (60°F). Additionally, December experiences significantly less precipitation, with only 3 mm (0.1 in) and no rainy days, in contrast to October, which sees 12 mm (0.5 in) of rainfall over one day. The humidity is also notably lower in December at 39%, compared to October's higher level of 61%. For more detailed information, you can check Valparaiso weather in October.

In comparing the weather between December and November, December tends to be slightly warmer, with average temperatures of 15°C (58°F) compared to November's 14°C (57°F). The minimum temperature in December is also higher at 12°C (54°F), while November starts a bit cooler at 10°C (50°F). Both months enjoy a maximum temperature of 17°C (63°F). Interestingly, December sees less precipitation, with only 3 mm (0.1 in) compared to November's 5 mm (0.2 in), and both months experience zero rainy days. However, the humidity is notably lower in December at 39%, compared to November's higher humidity level of 52%. For more details, you can explore Valparaiso weather in November.

Compare Valparaiso's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in Valparaiso

As December unfolds in Valparaiso, the city basks in mild temperatures and low humidity, making it a delightful time for outdoor activities. Compared to other months, this period stands out with virtually no rainfall and comfortable averages, often leading to clear skies and ample sunshine. With maximum temperatures reaching around 17°C, visitors can enjoy the coastal charm without the oppressive heat found in peak summer. For those looking to explore the unique blend of culture and nature, December offers a perfect balance. To learn more about what to expect throughout the year, check out Valparaiso Climate.