December Weather in San Salvador, El Salvador

Last updated: August 21, 2025

December in San Salvador, El Salvador offers a pleasant climate characterized by a maximum temperature reaching 35°C (95°F) and an average of 25°C (78°F), making it a warm getaway for visitors. With a minimum temperature dipping to 16°C (61°F), the evenings can be refreshingly cool. This month sees limited rainfall, with only 7 mm (0.3 in) of precipitation over just 1 day, allowing for plenty of sunny skies. The average humidity sits at 66%, adding a touch of tropical feel to the air. December is an ideal time to explore the vibrant culture and landscapes that San Salvador has to offer.

December Temperature in San Salvador

In December, temperatures in San Salvador begin to show a gentle decline as the year comes to a close, with minimums dropping to 16°C (61°F) and maximums reaching up to 35°C (95°F). The average temperature remains steady at 25°C (78°F), mirroring previous months and creating a pleasant climate for outdoor activities. Compared to November, the city experiences slightly cooler nights, yet the days remain comfortably warm—characteristic of its tropical highland climate. As the festive season approaches, December offers a delightful blend of warmth and mildness, making it an ideal time to explore the vibrant culture and stunning landscapes of El Salvador.

December Weather in San Salvador: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in San Salvador, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Salvador, 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).
JanFebMarAprMayJunJulAugSepOctNovDec777981818078808078787877
Data source: Temperature data for San Salvador 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 San Salvador

In December, San Salvador experiences a notable decrease in precipitation, accumulating just 7 mm (0.3 in) over the month. This marks a stark contrast to the preceding months, especially from May to September, where rainfall regularly soared above 250 mm due to the rainy season. Interestingly, December sees only one day of measurable rain, suggesting a shift towards drier conditions as the year concludes. This trend of minimal rainfall reflects the city's transition into the drier season, following a period of intense precipitation that can dominate earlier months. As the year wraps up, residents can look forward to more stable weather patterns, offering a reprieve from the heavy downpours characteristic of El Salvador's wet months.

December Precipitation Trends in San Salvador

The chart displays monthly precipitation patterns in San Salvador, 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 San Salvador, December typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec34559269292157252301272587
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in San Salvador

As December rolls in, San Salvador experiences a noticeable shift in humidity, settling at a comfortable 66%. This marks a decline from the muggy peak months of July and August, where humidity levels soar to 77% and 79%, respectively. Following the trend of increased moisture during the mid-year rainy season, humidity begins its gradual descent, maintaining a relatively moderate range throughout the rest of the year. Notably, December's humidity is higher than the earlier months of the year, such as January and February, which hover around 63% and 62%. Overall, this month reflects a transitional phase, balancing the lingering summer humidity with the upcoming drier months of January and February.

December Average Humidity in San Salvador

This chart illustrates the average monthly humidity levels in San Salvador, 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 San Salvador is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec63%62%59%59%59%68%78%79%77%77%75%67%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in San Salvador

In December, San Salvador experiences a UV Index of 9, which falls into the very high exposure category, indicating a burn time of 15 minutes. This marks a slight decrease from the extreme levels recorded in the preceding months, where the UV Index consistently hovered between 11 and 14. As the year winds down, residents and visitors alike should remain vigilant, as even at this reduced intensity, the risk of sunburn is significant. Overall, the trend shows that while December offers a reprieve from the highest extremes, the importance of sun safety remains essential. For more detailed information, visit San Salvador UV Index.

Maximum UV Index Levels in San Salvador for December

The chart shows the monthly maximum UV Index (UVI) for San Salvador 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 San Salvador typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec11121414141413131313109
Data source: San Salvador 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 San Salvador

As December approaches in San Salvador, the city's days are bathed in a generous 326 hours of sunshine, reflecting a beautiful culmination of the year’s radiant glow. Following a steady increase from January's 263 hours, the trend of sunlight consistently rises, peaking in March with 328 hours, a promise of vibrant days ahead. As the months roll on, the sunshine hours remain impressively high, showcasing the region's alluring climate. The slight dip in June to 284 hours is quickly overshadowed by the resurgence in July and December, where bright days dominate the landscape. December's warm and sunny disposition invites both locals and visitors to revel in the comfort of its sunshine, making it a splendid time to experience the charm of El Salvador.

Monthly Sunshine Duration in San Salvador: December Highlighted

The December sunshine duration represents the total number of hours San Salvador 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.
JanFebMarAprMayJunJulAugSepOctNovDec263h292h328h319h313h284h328h313h299h290h308h326h
Data source: San Salvador December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in San Salvador During December

In December, San Salvador enjoys a significant 72% chance of sunny weather, making it one of the brighter months as the year winds down. This showcases a favorable trend following November's 57%, suggesting that sunny days are on the rise as the dry season approaches. Compared to the wetter months of June and September, which plummet to 14% and 23% respectively, December stands out for its inviting climate, hinting at a promising start to the new year ahead. As the city beckons with festive spirit, those seeking sunshine will likely find themselves basking in pleasant rays during this delightful month.

Percentage of Sunny Days in December in San Salvador

The chart illustrates the percentage of sunny days in San Salvador 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 San Salvador experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec68%77%70%41%35%14%31%15%23%31%57%72%
Data source: San Salvador December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in San Salvador in December

In San Salvador, December ushers in a cozy ambiance with 11 hours of daylight, signaling a gentle transition towards shorter days as the year draws to a close. This pattern reflects a consistent trend throughout the months following October, as daylight gradually decreases from the longer, sun-soaked days of March through August, where 12 hours of daylight flourish. As we move into early winter, the daylight hours recede, settling back to 11 hours in both November and December, creating a sense of continuity in the city's rhythm. This gradual ebb of daylight not only highlights the changing seasons but also invites residents and visitors alike to embrace the warmth of each sunset as the vibrant energy of the year winds down.

Average Daylight Hours in San Salvador for December

The chart illustrates the variation in daylight duration in San Salvador throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec11h 24m11h 41m12h 3m12h 26m12h 45m12h 54m12h 49m12h 32m12h 10m11h 47m11h 28m11h 19m
Data source: San Salvador daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in San Salvador

As December arrives in San Salvador, the average wind speed gently settles at 2.0 m/s (4 mph), marking a slight decrease from November's brisk 2.4 m/s (5 mph). This transition into the holiday season brings with it a refreshing coolness, perfect for outdoor festivities. Throughout the year, wind speeds have shown a noticeable decline from the early months, peaking in November before tapering off toward the close of the year. The consistent light breezes in December evoke a sense of tranquility, making it an ideal time for locals and visitors alike to enjoy the vibrant atmosphere of the city against a backdrop of mild winds.

Average December Wind Speed in San Salvador

The chart displays monthly wind speed patterns in San Salvador, 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.
JanFebMarAprMayJunJulAugSepOctNovDec2.32.22.21.91.41.21.51.31.21.32.42.0 m/s
Data source: San Salvador December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in San Salvador Compares to Other Months

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

In December, the weather is characterized by a minimum temperature of 16°C (61°F) and a maximum of 35°C (95°F), with an average temperature of 25°C (78°F). The month sees approximately 7 mm (0.3 in) of precipitation over just one day, while humidity levels are relatively high at 66%.

In contrast, January experiences slightly cooler minimum temperatures at 15°C (59°F) but a marginally warmer maximum of 36°C (96°F), maintaining the average temperature at 25°C (78°F). January is drier, with only 3 mm (0.1 in) of precipitation and no rainy days, and humidity drops slightly to 63%. For more details on January weather, you can visit San Salvador weather in January.

December weather generally features slightly cooler temperatures, with an average of 25°C (78°F) and a maximum of 35°C (95°F). The month experiences a bit more humidity at 66%, along with some light precipitation, totaling 7 mm over just one day. In contrast, February sees a marginal rise in average temperature to 26°C (79°F), with maximums hitting 38°C (101°F), while remaining drier with only 4 mm of precipitation and zero rainy days. Humidity is also a bit lower at 62%. For more detailed information, check out San Salvador weather in February.

In December, the weather in San Salvador is generally warm, with minimum temperatures around 16°C (61°F) and an average of 25°C (78°F), peaking at a maximum of 35°C (95°F). The month sees minimal precipitation, with only 7 mm (0.3 in) recorded over just 1 day, and humidity levels at 66%. In contrast, March brings slightly higher temperatures, with a minimum of 17°C (64°F) and an average of 27°C (81°F), reaching up to 37°C (99°F). March also experiences lower precipitation levels at 5 mm (0.2 in) and the same frequency of 1 rainy day, but with reduced humidity at 59%. For a detailed overview, you can refer to San Salvador weather in March.

When comparing the weather between December and April, several notable differences emerge. December enjoys a warmer climate with average temperatures ranging from a minimum of 16°C (61°F) to a maximum of 35°C (95°F), accompanied by relatively low precipitation of just 7 mm (0.3 in) over a single day, and a humidity level of 66%. In contrast, April sees slightly higher temperatures, with a minimum of 19°C (67°F) and a maximum soaring up to 38°C (100°F), but it also experiences significantly more rainfall, totaling 59 mm (2.3 in) over 12 days and a humidity level of 59%. These factors make April a wetter and hotter month compared to the drier and somewhat cooler December. For more details, you can check San Salvador weather in April.

When comparing the weather in December and May, we see notable differences in temperature and precipitation. December features milder temperatures, with a minimum of 16°C (61°F) and an average of 25°C (78°F), while May brings slightly warmer conditions, with a minimum of 20°C (69°F) and an average of 27°C (80°F). Additionally, May is significantly wetter, receiving 269 mm (10.6 in) of precipitation over 26 days, contrasting sharply with December's low precipitation of just 7 mm (0.3 in) over only 1 day. While December enjoys a higher humidity level at 66%, May's humidity is at a comparatively lower 59%. For more details on May's weather, you can check San Salvador weather in May.

When comparing the weather in December and June, we see notable differences in temperature and precipitation. December typically experiences a more comfortable range, with minimum temperatures around 16°C (61°F) and an average of 25°C (78°F), accompanied by low precipitation of just 7 mm (0.3 in) over one day. In contrast, June has warmer nights with a minimum of 21°C (69°F) and averages at 26°C (79°F), but it brings significant rainfall, totaling 292 mm (11.5 in) across 27 days. The humidity is fairly similar in both months, hovering around 66% in December and slightly higher at 68% in June. For a detailed look at the weather specifics, you can refer to San Salvador weather in June.

December and July present contrasting weather patterns. In December, temperatures range from a pleasant minimum of 16°C (61°F) to a warm average of 25°C (78°F), peaking at a maximum of 35°C (95°F). The month sees minimal precipitation, with only 7 mm (0.3 in) over just one rainy day, and a humidity level of 66%. In contrast, July experiences higher temperatures, with a minimum of 21°C (69°F) and an average of 27°C (80°F), while still reaching a maximum of 35°C (96°F). However, July is significantly wetter, recording 157 mm (6.2 in) of rain over 21 days, and has a higher humidity level of 77%. For more detailed information, check out San Salvador weather in July.

December and August in San Salvador present notably different weather conditions. In December, temperatures range from a mild 16°C (61°F) to a warm 35°C (95°F), with an average of 25°C (78°F) and minimal precipitation of just 7 mm (0.3 in) over one day. The humidity level stands at 66%, making it relatively comfortable. In contrast, August experiences higher humidity at 79%, with minimum temperatures of 20°C (69°F) and an average of 26°C (80°F). However, it also sees significant rainfall, totaling 252 mm (9.9 in) over 25 days, resulting in a much wetter and more humid atmosphere. For a detailed overview of August weather in San Salvador, check out San Salvador weather in August.

When comparing the weather in December and September, there are notable differences in temperature, precipitation, and humidity. In December, temperatures range from a minimum of 16°C (61°F) to a maximum of 35°C (95°F), with an average of 25°C (78°F), and the humidity is relatively moderate at 66%. Conversely, September experiences warmer temperatures, with a minimum of 20°C (69°F), an average of 26°C (79°F), and a maximum of 34°C (93°F). However, September is significantly wetter, receiving 301 mm (11.9 in) of precipitation over 29 days, compared to just 7 mm (0.3 in) of rain for one day in December. This results in higher humidity levels in September, which reaches 77%. For more detailed insights, you can check San Salvador weather in September.

When comparing the weather in December and October, it's clear that December offers milder temperatures overall, with a minimum of 16°C (61°F) and a maximum of 35°C (95°F), maintaining an average temperature of 25°C (78°F). In contrast, October experiences slightly warmer minimums at 20°C (67°F) but only a marginally lower maximum of 34°C (93°F). However, October is significantly wetter, with a staggering 272 mm (10.7 in) of precipitation over 28 days, compared to December's much drier conditions with only 7 mm (0.3 in) of rain over just 1 day. Additionally, October has a higher humidity level at 77% compared to December's 66%. For a more detailed look at the weather during October, you can refer to San Salvador weather in October.

In comparing the weather of December and November, December presents slightly warmer temperatures with a minimum of 16°C (61°F) and a maximum of 35°C (95°F), while November starts a bit cooler with a minimum of 18°C (64°F) and peaks at 34°C (94°F). Both months have the same average temperature of 25°C (78°F). However, December experiences significantly less precipitation, with only 7 mm (0.3 in) over 1 day, in stark contrast to November's 58 mm (2.3 in) spread over 9 days. Additionally, humidity levels are lower in December at 66%, compared to November's 75%. For more detailed information, you can visit San Salvador weather in November.

Compare San Salvador's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in San Salvador

As December rolls into San Salvador, the weather offers a delightful contrast to the hotter months that precede it. With average temperatures sitting comfortably around 25°C (78°F), this month tends to be more pleasant, making it an ideal time for outdoor activities. The humidity remains moderate at 66%, while the minimal 7 mm of precipitation hint at mostly dry conditions, allowing for plenty of sunshine. This reduced rainfall and temperate climate set December apart as a welcoming month for both locals and visitors. To explore more about the intriguing weather patterns throughout the year, check out San Salvador Climate.