December Weather in San Luis Potosi, Mexico

Last updated: April 22, 2025

In December, San Luis Potosi experiences a temperate climate with a maximum temperature reaching 27°C (81°F) and a cool average of 13°C (55°F). Nighttime can get quite chilly, with temperatures dipping to a brisk -4°C (25°F). The region sees minimal rainfall, averaging just 9 mm (0.3 in) over the course of a single day, providing dry conditions ideal for outdoor activities. However, with humidity levels hovering around 87%, visitors may feel a bit of moisture in the air, adding a refreshing touch to this vibrant city at the heart of Mexico.

December Temperature in San Luis Potosi

In December, San Luis Potosi experiences a notable chill, with temperatures dipping to a minimum of -4°C (25°F), making it one of the colder months of the year. Despite the brisk mornings, the days warm up to an average of 13°C (55°F), reaching a comfortable maximum of 27°C (81°F). This transitional period showcases a shift from the warmer autumn months, where temperatures gradually rise from the winter lows of December. Overall, while the nights can be quite cool, the daytime temperatures offer a pleasant reprieve, providing a unique blend of winter crispness and mild daytime warmth that characterizes this vibrant city during the holiday season.

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

The chart illustrates December temperature patterns in San Luis Potosi, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec555964687169686866635855
Data source: Temperature data for San Luis Potosi 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 Luis Potosi

December in San Luis Potosi experiences a relatively dry end to the year, with precipitation measuring just 9 mm (0.3 in), making it one of the driest months alongside January. This modest rainfall typically occurs on only one day, further emphasizing the region's shift into its drier season. As temperatures cool and holiday festivities begin, the decreased precipitation marks a contrast to the preceding months of heavier rainfall, particularly June and September, which see an average of over 100 mm. This trend of reduced rain in December continues from November, which itself had a mere 3 days of precipitation, setting the stage for a drier winter landscape.

December Precipitation Trends in San Luis Potosi

The chart displays monthly precipitation patterns in San Luis Potosi, 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.
JanFebMarAprMayJunJulAugSepOctNovDec911131450104916010162199
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in San Luis Potosi

As December rolls into San Luis Potosi, the air is notably humid, with levels climbing to 87%, a stark contrast to the drier months earlier in the year. This increase in humidity marks a consistent trend observed from October's 85% and November's 87%, suggesting that the winter season brings a surge of moisture. While the summer months of June and July also experience high humidity at 78% and 67% respectively, they are notably more variable than the later months of the year. Charting a path from the year's drier spring months, which hovered around 64%-65%, it's clear that December stands out not just for its chill but also for its persistent moisture, showcasing the season's climatic transition in San Luis Potosi.

December Average Humidity in San Luis Potosi

This chart illustrates the average monthly humidity levels in San Luis Potosi, with December's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how December's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec75%69%65%64%75%78%67%64%82%86%87%87%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in San Luis Potosi

In December, San Luis Potosi experiences a UV Index of 8, categorized as very high, with a burn time of just 15 minutes. This decline from the extreme levels seen in the summer months highlights a seasonal trend that favors slightly lower UV radiation. However, the intensity remains significant, and caution is still warranted for outdoor activities during this time. It's essential to stay informed about the UV Index trends throughout the year, as they can help guide protective measures against sun exposure. For more information on local UV levels, check out San Luis Potosi UV Index.

Maximum UV Index Levels in San Luis Potosi for December

The chart shows the monthly maximum UV Index (UVI) for San Luis Potosi 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.
JanFebMarAprMayJunJulAugSepOctNovDec8111414151414141312108
Data source: San Luis Potosi 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 Luis Potosi

December in San Luis Potosí brings a warm embrace of sunshine, with 279 hours of bright daylight that heralds the arrival of winter. As the year winds down, this month showcases a delightful continuation of the region's sunlit charm, nestled between November's 269 hours and the transition into the new year. Notably, sunlight hours have consistently increased since the shortest day in January with only 222 hours, culminating in a peak of 343 hours in May. Throughout the year, San Luis Potosí enjoys an abundant amount of sunshine, particularly in the spring and summer months. As December settles in, it wraps up another radiant year filled with natural light, reminding us of the city's consistent warmth and beauty.

Monthly Sunshine Duration in San Luis Potosi: December Highlighted

The December sunshine duration represents the total number of hours San Luis Potosi 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.
JanFebMarAprMayJunJulAugSepOctNovDec222h262h309h322h343h327h327h331h291h282h269h279h
Data source: San Luis Potosi December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in San Luis Potosi During December

In December, the likelihood of enjoying sunny weather in San Luis Potosí, Mexico, stands at an encouraging 68%. This marks a notable increase from the preceding months, particularly when compared to the notable drop in sunshine during the summer months of June and July, where chances plummet to 29% and 25%, respectively. As the year draws to a close, December offers a refreshing contrast to the cloudier autumn months, including November, which offers a 57% chance of sunshine. Thus, if you're looking to bask in the sun during the winter season, December is a promising time to visit this vibrant region.

Percentage of Sunny Days in December in San Luis Potosi

The chart illustrates the percentage of sunny days in San Luis Potosi 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 Luis Potosi experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec51%79%65%59%54%29%25%38%24%40%57%68%
Data source: San Luis Potosi December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in San Luis Potosi in December

In December, daylight in San Luis Potosi, Mexico, shrinks to about 10 hours, mirroring the shorter days as winter settles in. This is a continuation of a subtle downward trend that begins in October, where daylight also clocks in at 11 hours. As the year progresses into the spring months, daylight gradually increases, peaking at 13 hours in both May and June before descending back into shorter daylight hours. Interestingly, the gradual rise and fall of daylight reflect the rhythms of the seasons, with the longest days behind us and a return to longer nights ahead. A clear pattern emerges as the year cycles, demonstrating the interplay between nature and time in this vibrant region.

Average Daylight Hours in San Luis Potosi for December

The chart illustrates the variation in daylight duration in San Luis Potosi throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec10h 55m11h 24m12h 1m12h 40m13h 11m13h 27m13h 19m12h 50m12h 14m11h 35m11h 3m10h 47m
Data source: San Luis Potosi daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in San Luis Potosi

As December arrives in San Luis Potosi, Mexico, the winds begin to calm, with an average speed dropping to 2.2 m/s (5 mph). This trend of diminishing gusts marks a shift from the slightly breezier conditions experienced in the earlier months, particularly August when winds peaked at 3.4 m/s (8 mph). Throughout the year, the wind speeds have shown a gentle oscillation, with spring and summer months maintaining a more moderate pace, hovering around 3 m/s. The gradual decline into December creates a tranquil atmosphere, inviting residents and visitors alike to enjoy the serene beauty of the winter landscape, unfettered by the stronger winds characteristic of other times of the year.

Average December Wind Speed in San Luis Potosi

The chart displays monthly wind speed patterns in San Luis Potosi, 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.
JanFebMarAprMayJunJulAugSepOctNovDec2.63.23.33.33.12.92.73.42.32.32.42.2 m/s
Data source: San Luis Potosi December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in San Luis Potosi Compares to Other Months

The weather in San Luis Potosi changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of December's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in San Luis Potosi and find detailed weather information for every month.

In December, temperatures range from a low of -4°C (25°F) to a high of 27°C (81°F), with an average temperature of 13°C (55°F). The month experiences minimal precipitation, with only 9 mm (0.3 in) falling over a single day and humidity levels reaching 87%. In contrast, January sees slightly milder conditions, with temperatures ranging from -1°C (31°F) to a maximum of 28°C (82°F), maintaining the same average of 13°C (55°F). Precipitation remains consistent at 9 mm (0.3 in) but occurs over two days, and humidity decreases to 75%. For more detailed information, you can check San Luis Potosi weather in January.

In December, San Luis Potosi experiences cooler temperatures, with a minimum of -4°C (25°F) and an average of 13°C (55°F), while February sees a milder range starting at 0°C (33°F) and averaging 15°C (60°F). The maximum temperatures also rise in February, reaching up to 32°C (91°F), compared to December's peak of 27°C (81°F). Although December has slightly less precipitation at 9 mm (0.3 in) over just one day, February experiences a bit more rainfall at 11 mm (0.4 in) spread over two days, along with noticeably lower humidity levels of 69% compared to December's 87%. For more details, you can check San Luis Potosi weather in February.

In December, the weather is quite cool, with temperatures ranging from a minimum of -4°C (25°F) to a comfortable maximum of 27°C (81°F), and an average temperature of 13°C (55°F). The month is relatively dry, with only 9 mm (0.3 in) of precipitation over just one day and high humidity at 87%. In contrast, March sees a significant warm-up, featuring minimum temperatures of 0°C (33°F) and reaching up to 33°C (92°F), with an average temperature of 18°C (64°F). Precipitation increases slightly to 13 mm (0.5 in) spread across three days, while humidity decreases to a more comfortable 65%. For more details on the weather in March, check out San Luis Potosi weather in March.

In December, the weather is notably cooler, with temperatures ranging from a minimum of -4°C (25°F) to a maximum of 27°C (81°F). The month sees low precipitation levels of just 9 mm (0.3 in) over about 1 day, and humidity is relatively high at 87%. In contrast, April brings a significant warming trend, featuring minimum temperatures of 6°C (44°F) and maximums reaching up to 33°C (92°F), alongside an average temperature of 20°C (68°F). Precipitation increases slightly to 14 mm (0.5 in) over 4 days, and humidity decreases to 64%. For more details on April weather, you can check out San Luis Potosi weather in April.

In December, temperatures in San Luis Potosi can dip as low as -4°C (25°F), with an average of 13°C (55°F) and maximums reaching 27°C (81°F). The month sees minimal precipitation, with only 9 mm (0.3 in) over just one day, coupled with high humidity at 87%. In contrast, May brings significantly warmer temperatures, with lows around 8°C (47°F) and highs soaring up to 35°C (95°F), averaging around 22°C (71°F). It is also a much wetter month, receiving 50 mm (2.0 in) of rain over about eight days, while humidity decreases to 75%. For more details on the weather during this vibrant spring month, visit San Luis Potosi weather in May.

December and June in San Luis Potosí present quite contrasting weather conditions. In December, temperatures can range from a minimum of -4°C (25°F) to a maximum of 27°C (81°F), with an average of 13°C (55°F). The month is relatively dry, with only 9 mm (0.3 in) of precipitation over just one day, and the humidity is quite high at 87%. In contrast, June experiences much warmer temperatures, with a minimum of 11°C (52°F) and a maximum reaching up to 34°C (93°F), averaging around 21°C (69°F). June is also significantly wetter, receiving 104 mm (4.1 in) of rainfall over 14 days, along with a lower humidity level of 78%. For more detailed information about June weather specifics, visit San Luis Potosi weather in June.

In December, the weather in San Luis Potosi is generally cooler, with temperatures ranging from a chilly minimum of -4°C (25°F) to a mild maximum of 27°C (81°F) and an average of 13°C (55°F). The month sees low precipitation, with only about 9 mm (0.3 in) spread over a single day, and humidity levels are relatively high at 87%. Conversely, July experiences much warmer conditions, with temperatures varying from a minimum of 11°C (53°F) to a peak of 31°C (88°F), averaging around 20°C (68°F). This month is characterized by significant rainfall, totaling 91 mm (3.6 in) over 12 days, and a lower humidity level of 67%. For a more in-depth look at what to expect in July, you can check the details here: San Luis Potosi weather in July.

The weather in December showcases a remarkable range, with temperatures ranging from a chilly -4°C (25°F) to a pleasant 27°C (81°F), and an average of 13°C (55°F). This month experiences minimal precipitation, with only 9 mm (0.3 in) over just one day and high humidity at 87%.

In contrast, August brings warmer temperatures, with a minimum of 12°C (53°F) and a maximum of 31°C (88°F), averaging around 20°C (68°F). Precipitation is significantly higher during this month, totaling 59 mm (2.3 in) across eight days, accompanied by a more moderate humidity of 64%.

For more details on August weather patterns, you can visit San Luis Potosi weather in August.

December and September present quite different weather patterns. In December, temperatures can range from a chilly minimum of -4°C (25°F) up to a warm maximum of 27°C (81°F), with an average of 13°C (55°F). The month sees very little precipitation, just 9 mm (0.3 in) over only one day, and the humidity is relatively high at 87%. In contrast, September offers milder minimum temperatures of 9°C (49°F) and a warmer average of 19°C (66°F), with highs reaching up to 30°C (87°F). Rainfall is significantly more abundant during this month, with 101 mm (4.0 in) across 15 days, and humidity levels are a bit lower at 81%. For more detailed information on September weather, check out San Luis Potosi weather in September.

When comparing the weather in December and October, we see a notable shift in temperatures and precipitation. December experiences cooler temperatures, with a minimum of -4°C (25°F) and an average of 13°C (55°F), making it much colder than October, which has a minimum of 4°C (39°F) and an average of 17°C (63°F). Although both months have high humidity levels, December is relatively drier, with only 9 mm (0.3 in) of precipitation over just 1 day compared to October's 62 mm (2.4 in) spread over 10 days. For more details on October's weather, you can check San Luis Potosi weather in October.

In comparing the weather between November and December, December tends to be slightly cooler with an average temperature of 13°C (55°F), compared to November’s higher average of 15°C (59°F). The minimum temperatures are also lower in December, dropping to -4°C (25°F) versus November's minimum of -1°C (31°F). Precipitation is less frequent in December, with only 9 mm (0.3 in) falling over 1 day, compared to November's 19 mm (0.7 in) spread over 3 days. Nonetheless, the humidity remains consistent at 87% for both months, providing a similarly damp atmosphere. For more detailed information, you can refer to the San Luis Potosi weather in November.

Compare San Luis Potosi's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in San Luis Potosi

As December unfolds in San Luis Potosi, the weather presents a distinct shift compared to other months. With a remarkable blend of cool evenings and mild daytime warmth, this month stands out for its low humidity and minimal precipitation, making it one of the driest periods of the year. While temperatures can dip significantly at night, the sunny days invite residents and visitors alike to explore the city's vibrant atmosphere. For a deeper understanding of what to expect throughout the year, check out the detailed information available at San Luis Potosi Climate.