December Weather in Hermosillo, Mexico

Last updated: April 22, 2025

December in Hermosillo, Mexico brings a delightful contrast of temperatures, with daily maximums reaching 28°C (84°F) and a comfortable average of 14°C (58°F). Nights can get cooler, dipping to a refreshing 3°C (38°F). This month sees a modest amount of rainfall, totaling only 8 mm (0.3 in) over just a single day, allowing plenty of opportunity to enjoy the city's vibrant outdoor life. As humidity settles at 74%, December offers a perfect balance of warmth and mildness, making it an ideal time to experience the beauty of Hermosillo's early winter.

December Temperature in Hermosillo

December in Hermosillo, Mexico brings a gentle transition into cooler temperatures as winter sets in. With minimums dropping to around 3°C (38°F) and average highs reaching a pleasant 28°C (84°F), the month offers a refreshing break from the intense heat of summer. This pattern is characteristic of the region, where temperatures gradually decline from the soaring highs of previous months, leading into the cool, crisp air of winter. Visitors can expect mild days tempered with cooler nights, making December an ideal time to explore the city's vibrant culture and outdoor attractions without the sweltering heat.

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

The chart illustrates December temperature patterns in Hermosillo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec596168778290969690786858
Data source: Temperature data for Hermosillo generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Hermosillo

December in Hermosillo, Mexico, marks the onset of cooler temperatures accompanied by a modest precipitation amount of 8 mm (0.3 in) over a single day. This slight increase in rain reflects a trend of limited rainfall during the winter months, contrasting sharply with the wetter season earlier in the year. Notably, November saw no precipitation at all, while November and October both experienced only one day of rain. As the year closes, December's precipitation reiterates Hermosillo's dry climate, with variability evident but generally low rainfall compared to the late summer months. This pattern underscores the region's seasonal shifts, highlighting how the latter part of the year experiences a significant drop in precipitation after the wetter summer.

December Precipitation Trends in Hermosillo

The chart displays monthly precipitation patterns in Hermosillo, 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.
JanFebMarAprMayJunJulAugSepOctNovDec8141732010918768
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Hermosillo

In December, Hermosillo, Mexico, experiences a notable uptick in humidity, reaching 74%. This increase follows a gradual rise from the drier months of summer, where humidity dipped to an arid 42% in August. The trend reveals a general seasonal pattern, with humidity levels typically higher in the winter months, peaking in January and February, and retreating to their lowest in late spring and summer. December's humidity, while elevated compared to the summer months, signifies a return to a more comfortable atmosphere as the city transitions into its cooler season, preparing for the wetter months ahead. This shift not only enhances the climate’s comfort but also sets the stage for the seasonal festivities that define the month.

December Average Humidity in Hermosillo

This chart illustrates the average monthly humidity levels in Hermosillo, 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.
JanFebMarAprMayJunJulAugSepOctNovDec72%77%67%56%46%48%46%42%52%58%66%74%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Hermosillo

As December rolls into Hermosillo, Mexico, the UV Index dips to a moderate level of 4, resembling the index seen at the beginning of the year in January. This slight decrease represents a welcome relief from the extreme levels recorded during the sweltering summer months. With a burn time of 30 minutes, residents and visitors are reminded that while sunlight exposure can still occur, it is more manageable compared to peak months like May and July, where the index soared to 11 and 12, indicating extreme exposure risks. As you enjoy the milder sun in December, it's a perfect time to reflect on the seasonal trends of UV radiation and plan your outdoor activities accordingly. For detailed insights, visit Hermosillo UV Index.

Maximum UV Index Levels in Hermosillo for December

The chart shows the monthly maximum UV Index (UVI) for Hermosillo 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.
JanFebMarAprMayJunJulAugSepOctNovDec469101111121110854
Data source: Hermosillo 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 Hermosillo

December in Hermosillo, Mexico, marks a transition into cooler temperatures while still basking in an impressive 247 hours of sunshine. As the year draws to a close, the city experiences a notable dip from the abundant light of previous months, peaking in May with 373 hours. This pattern signals a gradual decline in daylight, beginning in June, yet December’s sun still shines brightly compared to the winter months elsewhere. With the sun gracing the city for over eight hours each day, residents and visitors alike can enjoy the warmth of Hermosillo's December days, setting a perfect stage for festive outdoor activities despite the cooler air.

Monthly Sunshine Duration in Hermosillo: December Highlighted

The December sunshine duration represents the total number of hours Hermosillo 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.
JanFebMarAprMayJunJulAugSepOctNovDec204h251h309h331h373h377h375h358h322h304h264h247h
Data source: Hermosillo December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Hermosillo During December

In Hermosillo, Mexico, the likelihood of sunny weather experiences a noticeable decline as December arrives, with a 62% chance of sunshine. This marks a drop from the more promising percentages seen in the preceding months, where the sun is typically embraced with a 74% chance in November and peaking at 92% in May. While December may not boast the sunniest reputation compared to earlier months, it still offers more sunny days than not, inviting residents and visitors alike to enjoy the warmth amidst the cooler winter atmosphere. As the year winds down, the city still holds onto its sunny disposition, albeit with a hint of cloudiness.

Percentage of Sunny Days in December in Hermosillo

The chart illustrates the percentage of sunny days in Hermosillo 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 Hermosillo experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec71%73%83%82%93%77%54%84%84%81%74%62%
Data source: Hermosillo December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Hermosillo in December

In Hermosillo, Mexico, the trend of daylight duration throughout the year reveals a harmonious cycle that aligns with the changing seasons. Starting with about 10 hours of daylight in January, the sun gradually lengthens its embrace, peaking at 14 hours in June and July. As the year progresses, daylight begins to retreat, ultimately returning to 10 hours by December. This pattern not only showcases the vibrant Mexican sun but also reflects the transition from the longer, sun-filled days of summer to the more subdued light of winter, making each season uniquely captivating in this desert city.

Average Daylight Hours in Hermosillo for December

The chart illustrates the variation in daylight duration in Hermosillo throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec10h 16m11h 1m12h13h13h 50m14h 14m14h 1m13h 16m12h 19m11h 19m10h 27m10h 2m
Data source: Hermosillo daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Hermosillo

As December winds settle over Hermosillo, Mexico, they whisper a gentle retreat reminiscent of the month's quieter pace. With an average wind speed of 2.4 m/s (5 mph), December reflects a slight dip from the year’s earlier months, mirroring November's calm. This subtle transition from the slightly brisker gusts of summer and autumn emphasizes a shift toward stillness, inviting cozy gatherings and reflective moments. Despite the decrease, the winds remain a characteristic element of Hermosillo's climate, wrapping the city in a mild embrace as the year draws to a close.

Average December Wind Speed in Hermosillo

The chart displays monthly wind speed patterns in Hermosillo, 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.
JanFebMarAprMayJunJulAugSepOctNovDec2.73.12.92.92.72.83.22.82.32.62.42.4 m/s
Data source: Hermosillo December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Hermosillo Compares to Other Months

The weather in Hermosillo 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 Hermosillo and find detailed weather information for every month.

In December, the weather typically features a minimum temperature of 3°C (38°F) and an average of 14°C (58°F), with highs reaching up to 28°C (84°F). The month is relatively dry, with only about 8 mm (0.3 in) of precipitation spread over just one day, and humidity levels hover around 74%.

In contrast, January sees slightly cooler temperatures, with a minimum of 2°C (35°F) and an average of 15°C (59°F), while highs can reach 30°C (86°F). Precipitation remains consistent at 8 mm (0.3 in) over the same one-day period, but the humidity dips to 72%.

For more details on the weather in January, you can visit this link: Hermosillo weather in January.

December and February in Hermosillo present distinct weather patterns, with February generally being slightly warmer. While December sees temperatures ranging from a minimum of 3°C (38°F) to a maximum of 28°C (84°F) and an average of 14°C (58°F), February offers a slightly lower minimum of 2°C (36°F) but higher maximum temperatures reaching 31°C (89°F) and an average of 16°C (62°F). Additionally, December experiences less precipitation at 8 mm (0.3 in) over just one day, whereas February has a total of 14 mm (0.6 in) across two days, resulting in a bit more humidity, which is 77% in February compared to 74% in December. For more detailed information, you can check Hermosillo weather in February.

In December, Hermosillo's weather features mild temperatures with a minimum of 3°C (38°F) and an average high of 28°C (84°F), accompanied by a humidity level of 74%. Precipitation is minimal, with only 8 mm (0.3 in) occurring over just one day. In contrast, March brings warmer conditions, with a minimum temperature of 5°C (41°F) and an average high soaring to 37°C (98°F). Although it is slightly wetter, with 17 mm (0.7 in) of precipitation over one day, the humidity decreases to 67%. For more detailed information on weather patterns in March, you can visit Hermosillo weather in March.

December and April showcase a stark contrast in weather conditions. In December, temperatures range from a minimum of 3°C (38°F) to a maximum of 28°C (84°F), with an average of 14°C (58°F). This month experiences a bit more humidity at 74% and some light precipitation of 8 mm (0.3 in) over a single day. In contrast, April boasts a warmer climate with temperatures ranging from a minimum of 9°C (48°F) to a scorching maximum of 43°C (109°F), averaging around 25°C (77°F). Additionally, April enjoys significantly lower humidity at 56% and minimal precipitation, with only 3 mm (0.1 in) recorded across zero days. For more details, you can check out Hermosillo weather in April.

December and May present striking contrasts in weather. In December, temperatures range from a minimum of 3°C (38°F) to a maximum of 28°C (84°F), with an average of 14°C (58°F). The month experiences a low level of precipitation, averaging 8 mm (0.3 in) over just one day, and the humidity is relatively high at 74%. In stark contrast, May boasts much warmer temperatures, with lows of 13°C (55°F) and highs soaring up to 43°C (110°F), averaging around 28°C (82°F). This month sees minimal rainfall, with only 2 mm (0.1 in) and no rainy days, accompanied by a significantly lower humidity level of 46%. For a closer look at the specific conditions in May, check out Hermosillo weather in May.

December and June showcase stark contrasts in weather, highlighting the seasonal shifts. In December, temperatures range from a minimum of 3°C (38°F) to a maximum of 28°C (84°F), with an average of 14°C (58°F) and a notable humidity of 74%. The month experiences minimal precipitation, with just 8 mm (0.3 in) over a single day. In contrast, June temperatures soar significantly, with a minimum of 18°C (65°F) and a staggering maximum reaching 49°C (120°F), averaging 32°C (90°F) and displaying much lower humidity at 48%. Moreover, June is characterized by complete dryness, recording no precipitation at all. For more detailed information, visit Hermosillo weather in June.

December and July showcase strikingly different weather patterns. In December, temperatures range from a minimum of 3°C (38°F) to a maximum of 28°C (84°F), with an average of 14°C (58°F). This month experiences relatively low precipitation, totaling just 8 mm (0.3 in) over one day, and a humidity level of 74%, contributing to a cool and somewhat damp atmosphere. In contrast, July's weather is significantly hotter, with minimum temperatures around 22°C (72°F) and averages soaring to 35°C (96°F), peaking at a scorching 48°C (119°F). Precipitation in July is slightly higher at 10 mm (0.4 in) over two days, but the humidity is lower at 46%, resulting in a dry and oppressive heat. For more detailed information about July weather, you can check Hermosillo weather in July.

December and August present strikingly different weather conditions. In December, temperatures range from a chilly 3°C (38°F) at night to a pleasant 28°C (84°F) during the day, with an average of 14°C (58°F). The month experiences minimal precipitation, just 8 mm (0.3 in) over about one day, and a high humidity level of 74%. In contrast, August is swelteringly hot, with minimum temperatures of 24°C (76°F) and daily highs soaring to 47°C (117°F), averaging around 36°C (96°F). Although August also has moderate precipitation of 9 mm (0.3 in), it falls over three days, and the humidity drops significantly to 42%. For more detailed insights on the heat of August, check out Hermosillo weather in August.

In December, the weather in Hermosillo is characterized by milder temperatures, with minimums around 3°C (38°F) and maximums reaching 28°C (84°F), resulting in a comfortable average of 14°C (58°F). The month experiences minimal precipitation, with only about 8 mm (0.3 in) over just a single day, accompanied by relatively high humidity at 74%. In contrast, September presents a much hotter climate, with morning lows of 16°C (61°F) and highs soaring up to 48°C (120°F), averaging a sweltering 32°C (90°F). This month also sees more rainfall, totaling around 18 mm (0.7 in) spread over three days, and noticeably lower humidity at 52%. For more detailed information on September weather, check out Hermosillo weather in September.

In December, the weather in Hermosillo experiences a noticeable shift, with average temperatures ranging from a minimum of 3°C (38°F) to a maximum of 28°C (84°F), compared to October, which boasts much warmer averages of 8°C (47°F) to 43°C (110°F). Although both months see similar low precipitation levels, December tends to feel more humid, with a humidity level of 74% compared to October's 58%. For a detailed comparison of the October climate, you can visit Hermosillo weather in October.

In comparing the weather between December and November, December experiences cooler temperatures with a minimum of 3°C (38°F) and an average of 14°C (58°F), in stark contrast to November's warmer averages, which include a minimum of 7°C (45°F) and an average of 20°C (68°F). Additionally, December sees a maximum temperature of 28°C (84°F), compared to November's higher maximum of 36°C (97°F). Precipitation levels are slightly higher in December at 8 mm (0.3 in) over just one day, whereas November had only 6 mm (0.2 in) with no recorded rainy days. The humidity also rises in December to 74%, compared to November's 66%. For more detailed insights on November weather, check out Hermosillo weather in November.

Compare Hermosillo's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in Hermosillo

As December unfolds in Hermosillo, the weather takes on a unique character compared to the warmer months. With a comfortable average temperature that hovers around 14°C (58°F), days are pleasantly mild, while cooler nights dip down to 3°C (38°F). This month also marks a significant drop in humidity, making the air feel crisper and more refreshing. The minimal precipitation, generally just a day of light rain, contributes to the tranquil atmosphere that winter brings. For a deeper understanding of how December weather fits into the larger picture of Hermosillo’s climate, visit Hermosillo Climate.