December Weather in Salt Lake City, United States

Last updated: February 24, 2025

In December, Salt Lake City experiences a dramatic winter ambiance characterized by cool temperatures and high humidity. The maximum daily temperature reaches around 15°C (59°F), while the average temperature hovers around -1°C (30°F), with nighttime lows dipping to a brisk -13°C (8°F). Residents can expect approximately 47 mm (1.8 in) of precipitation over 10 days, contributing to the city's moisture-laden atmosphere with an humidity level of 88%. This weather pattern creates a unique blend of winter charm and chilly conditions, influencing both outdoor activities and daily life in the area.

December Temperature in Salt Lake City

In Salt Lake City, December marks a transition into the heart of winter, with temperatures dipping significantly compared to the milder months preceding it. The minimum temperature hovers around a brisk -13°C (8°F), while the average settles right at -1°C (30°F), bringing a chill to the air. Despite the cold, daytime highs can reach a relatively comfortable 15°C (59°F), allowing for brief respites from the winter chill. This pattern reveals a distinct trend: as the year progresses towards December, the temperatures drop notably, especially when compared to the autumn months. The shift from the autumn's cooler temperatures to December's stark winter cold underscores the dynamic climate of the region, highlighting both the beauty and the bite of the season.

December Weather in Salt Lake City: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Salt Lake City, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec303342495972807767504130
Data source: Temperature data for Salt Lake City 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 Salt Lake City

In December, Salt Lake City experiences a notable precipitation pattern, with 47 mm (1.8 in) of rain spread over 10 days. This month's total rainfall marks a slight decline from the wetter fall months, yet it still reflects a vibrant winter season typical of the area. As the year comes to a close, December’s precipitation continues the trend of increased moisture, setting the stage for the snow-capped peaks that define the city’s stunning landscape. This uptick compared to the drier summer months signals the transition into a climate that favors both rain and snow, contributing to the region's essential water supply and winter recreational opportunities.

December Precipitation Trends in Salt Lake City

The chart displays monthly precipitation patterns in Salt Lake City, 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.
JanFebMarAprMayJunJulAugSepOctNovDec526062655015101634413447
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Salt Lake City

As December rolls into Salt Lake City, humidity levels rise to 88%, marking a significant increase from the drier summer months, particularly July and August, which recorded 44% and 37%, respectively. This month’s humidity closely follows November's 84%, creating a noticeable trend of moisture saturating the air as winter approaches. The gradual ascent from winter’s chill in January at 91% to the milder summer lows demonstrates how the city's humidity fluctuates seasonally. With the transition from the dry heat of summer to the brisk winter, December serves as a reminder of the region's dynamic weather, wrapping the city in a blanket of cool, humid air.

December Average Humidity in Salt Lake City

This chart illustrates the average monthly humidity levels in Salt Lake City, 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.
JanFebMarAprMayJunJulAugSepOctNovDec91%92%84%75%62%56%44%37%46%67%84%88%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Salt Lake City

As December rolls into Salt Lake City, the UV Index drops to a moderate level of 3, mirroring January’s conditions and providing a stark contrast to the peak indices experienced during the summer months. With a burn time of approximately 30 minutes, outdoor enthusiasts can still enjoy the crisp winter air while remaining mindful of sun protection, particularly at higher elevations. This seasonal trend of lower UV exposure encourages a more cautious approach to sun safety, following the very high and extreme levels seen in the previous months. As such, December offers a welcome respite for those looking to balance enjoyment of the outdoors with skin health. For more details on the UV Index throughout the year, check out Salt Lake City UV Index.

Maximum UV Index Levels in Salt Lake City for December

The chart shows the monthly maximum UV Index (UVI) for Salt Lake City 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.
JanFebMarAprMayJunJulAugSepOctNovDec3579101211109643
Data source: Salt Lake City 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 Salt Lake City

As the year draws to a close, December in Salt Lake City offers a tranquil respite with 198 hours of sunshine. While this marks a decrease from the vibrant 260 hours of March, it is still a pleasant brightness amidst the winter chill. The city's sunniest months are clearly in the heart of summer, peaking in July with an impressive 390 hours, while the gradual decline in daylight hours from that peak leads to a cozy, albeit dimmer December. As one transitions through the months, the sunshine trend illustrates a captivating annual rhythm, with winter months inviting a reflective peace, contrasting beautifully against the brilliant brightness of mid-year.

Monthly Sunshine Duration in Salt Lake City: December Highlighted

The December sunshine duration represents the total number of hours Salt Lake City 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.
JanFebMarAprMayJunJulAugSepOctNovDec153h200h260h294h360h383h390h360h313h269h216h198h
Data source: Salt Lake City December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Salt Lake City During December

December in Salt Lake City carries a 41% chance of sunny weather, marking it as one of the cooler months for sunlight in the region. Following the trend from the year, we see that as the seasons shift from the vibrant sunshine of late summer, which boasts up to 78% chance in August, the likelihood of sun starts to taper off. After a gradual decline through autumn, December's figures align closely with those of January and February, both hovering around the low 40s. This pattern highlights a seasonal trend where clear skies become less common as the city bids farewell to the warmer months, making sunny days in December a refreshing yet rare delight for residents and visitors alike.

Percentage of Sunny Days in December in Salt Lake City

The chart illustrates the percentage of sunny days in Salt Lake City 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 Salt Lake City experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec42%41%50%60%59%69%62%78%77%44%48%41%
Data source: Salt Lake City December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Salt Lake City in December

In Salt Lake City, December marks the continuation of a trend toward shorter days as the year winds down. With daylight lasting only 9 hours, the city experiences a temporary dip in sunlight, consistent with the tail end of autumn. Following the peak of summer, where days stretch to a generous 15 hours in June, the reduction becomes more pronounced in the fall, dropping to 11 hours in October and 9 hours in November. As December arrives, residents feel a familiar embrace of the shorter days, reminiscent of their November counterparts, before gradually ushering in the return of longer daylight hours as winter gives way to spring in the coming months. This cyclical ebb and flow of daylight underscores the changing seasons and the rhythms of life in this vibrant city.

Average Daylight Hours in Salt Lake City for December

The chart illustrates the variation in daylight duration in Salt Lake City throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 37m10h 39m11h 58m13h 19m14h 27m15h 1m14h 42m13h 41m12h 24m11h 3m9h 53m9h 18m
Data source: Salt Lake City daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Salt Lake City

As December sweeps into Salt Lake City, the winds begin to pick up, reaching an average speed of 2.5 m/s (6 mph), a noticeable increase compared to the calmer late autumn months. This winter month's wind speed aligns with the upward trend seen in the warmer months, peaking in June but maintaining a brisk pace during December, surpassing even the earlier fall average of 1.8 m/s in November. The consistency in wind speeds from July through November suggests a temporary dip in airflow, likely a precursor to the sharper gusts typical of Utah's winter. As residents bundle up for the season, the invigorating December winds remind us of winter’s arrival, bringing a refreshing chill to the air.

Average December Wind Speed in Salt Lake City

The chart displays monthly wind speed patterns in Salt Lake City, 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.
JanFebMarAprMayJunJulAugSepOctNovDec2.02.12.32.22.42.52.12.32.32.31.82.5 m/s
Data source: Salt Lake City December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Salt Lake City Compares to Other Months

The weather in Salt Lake City 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 Salt Lake City and find detailed weather information for every month.

In December, the weather features a milder temperature range with a minimum of -13°C (8°F) and a maximum of 15°C (59°F), while January experiences colder conditions, as the minimum can drop to -22°C (-6°F) despite a similar average temperature of -1°C (30°F). Both months see about 10 days of precipitation, but January has slightly more, with 52 mm (2.0 in) compared to December's 47 mm (1.8 in). Additionally, humidity tends to be slightly higher in January at 91% versus December's 88%. For detailed insights into January weather conditions, check out Salt Lake City weather in January.

December and February display distinct yet comparable winter weather patterns. In December, temperatures range from a minimum of -13°C (8°F) to a maximum of 15°C (59°F), with an average of -1°C (30°F) and a total precipitation of 47 mm (1.8 in) over about 10 days. Humidity sits at a relatively high 88%. In contrast, February features colder temperatures, with a minimum of -20°C (-4°F) and a maximum of 18°C (65°F), while the average temperature rises slightly to 1°C (34°F). Precipitation increases to 60 mm (2.4 in) over the same number of days, accompanied by a slightly higher humidity level of 92%. For a deeper look into February's climate specifics, check out Salt Lake City weather in February.

In December, the weather features a typical winter chill with minimum temperatures dropping to -13°C (8°F) and an average of -1°C (30°F). The maximum temperature can reach a mild 15°C (59°F), accompanied by 47 mm (1.8 in) of precipitation over approximately 10 days, with humidity levels at 88%.

In contrast, March introduces a gradual warming trend, where minimum temperatures can dip to -18°C (0°F), but the average rises to a more comfortable 6°C (43°F). The maximum temperature can soar to 26°C (78°F), reflecting the transition to spring. Although March sees increased precipitation at 61 mm (2.4 in) over 10 days, humidity remains slightly lower at 84%. For a more detailed look at March weather, you can visit Salt Lake City weather in March.

December and April showcase striking differences in weather patterns. In December, temperatures can swing from a chilly minimum of -13°C (8°F) to a slightly warmer maximum of 15°C (59°F), with an average temperature of -1°C (30°F). The month experiences around 47 mm (1.8 in) of precipitation over 10 days, coupled with high humidity levels at 88%. In contrast, April brings a notable warming trend, with temperatures ranging from a minimum of -5°C (23°F) to a pleasant maximum of 28°C (82°F) and an average of 10°C (50°F). Rainfall increases to 65 mm (2.6 in) over the same number of days, but humidity drops to a more comfortable 74%. For more information about Salt Lake City weather in April, be sure to check the detailed forecast.

December and May present contrasting weather experiences. In December, temperatures can range from a chilling minimum of -13°C (8°F) to a maximum of 15°C (59°F), with an average of -1°C (30°F). The month sees about 47 mm (1.8 in) of precipitation over approximately 10 days, coupled with high humidity levels of 88%, creating a cold and damp atmosphere. In contrast, May enjoys a much warmer climate, with temperatures varying from a minimum of -1°C (31°F) to a sunny peak of 35°C (95°F) and an average of 15°C (59°F). May typically experiences slightly more precipitation at 50 mm (2.0 in) over 9 days, but the humidity drops to a more comfortable 62%. For a more detailed look at the weather trends, you can explore Salt Lake City weather in May.

December and June present a striking contrast in weather patterns. In December, temperatures can plunge as low as -13°C (8°F), with an average temperature around -1°C (30°F) and a maximum reaching just 15°C (59°F). The month is characterized by high humidity at 88% and precipitation occurring over 10 days, totaling 47 mm (1.8 in). In contrast, June offers much warmer and more pleasant conditions, with minimum temperatures of 5°C (41°F) and average highs of 22°C (72°F), soaring up to a maximum of 39°C (103°F). Precipitation is minimal in June, with only 15 mm (0.6 in) recorded over just 2 days, and humidity levels drop significantly to 56%. This comparison highlights the seasonal extremes, making December a chilly winter month and June a hot summer experience. For more details on June weather, you can check Salt Lake City weather in June.

December and July present striking contrasts in weather. In December, temperatures can plunge to a minimum of -13°C (8°F) and average around -1°C (30°F), resulting in a chilly atmosphere with 88% humidity. The month sees around 47 mm (1.8 in) of precipitation over approximately 10 days, creating a wintery scene. In contrast, July boasts much warmer conditions, with minimum temperatures starting at 10°C (50°F) and average highs reaching a scorching 27°C (81°F), peaking at 39°C (102°F). July experiences much less precipitation, with only 10 mm (0.4 in) over 3 days and a significantly lower humidity of 44%, contributing to a drier and sunnier climate. For more details on July weather, see Salt Lake City weather in July.

December and August present starkly contrasting weather conditions. December experiences much colder temperatures, with minimums reaching as low as -13°C (8°F) and averages hovering around -1°C (30°F). In contrast, August boasts a warm climate, featuring minimum temperatures around 10°C (51°F) and an inviting average of 25°C (78°F), with maximums soaring to 39°C (103°F). Additionally, December sees significant precipitation over about 10 days, accumulating to 47 mm (1.8 in), while August remains relatively dry, with only 16 mm (0.6 in) of rain over just 2 days. The humidity also diverges significantly: December's average humidity is a damp 88%, compared to a much more comfortable 37% in August. For more detailed information on summer weather, visit Salt Lake City weather in August.

December and September showcase distinct weather patterns, with December featuring much colder temperatures, ranging from a minimum of -13°C (8°F) to an average of -1°C (30°F), while September enjoys milder conditions with temperatures between a minimum of 2°C (35°F) and an average of 19°C (67°F). The maximum temperature in September can reach a sweltering 36°C (98°F), significantly higher than December's maximum of 15°C (59°F). Additionally, December sees more humidity at 88% and higher precipitation levels, with 47 mm (1.8 in) over about 10 days, compared to September's 34 mm (1.3 in) over just 4 days. For more detailed information, you can check Salt Lake City weather in September.

December's weather is significantly colder compared to October, with temperatures ranging from a minimum of -13°C (8°F) to a maximum of 15°C (59°F), while October enjoys milder temperatures that vary from -14°C (7°F) at night to a warm 28°C (83°F) during the day. The average temperature in December hovers around -1°C (30°F), in stark contrast to October's comfortable average of 10°C (50°F). Precipitation levels are slightly higher in December, at 47 mm (1.8 in) over about 10 days, compared to October's 41 mm (1.6 in) over just 6 days. Additionally, December experiences higher humidity at 88%, compared to October's 67%. For more detailed information about the weather in October, you can check out Salt Lake City weather in October.

In comparison to November, December experiences colder temperatures, with an average of -1°C (30°F) compared to November's milder average of 5°C (41°F). While both months see significant lows, December's minimum temperature dips to -13°C (8°F), which is slightly colder than November's -12°C (10°F). Additionally, December has more precipitation, totaling 47 mm (1.8 in) over 10 days, in contrast to November's 34 mm (1.3 in) spread over just 6 days. Humidity remains relatively high in both months, with December at 88% and November at 84%. For more detailed insights, you can check out Salt Lake City weather in November.

Compare Salt Lake City's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in Salt Lake City

As December arrives in Salt Lake City, the weather undergoes a striking transformation, contrasting sharply with the milder months preceding it. The city's temperatures can plummet to chilling lows, making it the coldest month of the year, while the average dips well below freezing. The increased precipitation and heightened humidity create a wintry atmosphere that often results in snow, enveloping the landscape in a serene blanket of white. With around ten days of measurable precipitation, December serves as a reminder of the beauty and challenges of winter. For more detailed insights into the weather patterns throughout the year, explore the Salt Lake City Climate.