December Weather in Twin Falls, United States

Last updated: February 24, 2025

In December, Twin Falls, United States experiences a chilly climate, with maximum temperatures reaching 16°C (60°F), while the average hovers around the freezing point at 0°C (32°F). Nights bring a significant drop, with minimum temperatures plummeting to -12°C (10°F). The city sees 39 mm (1.5 in) of precipitation over approximately 8 days, contributing to the overall 87% humidity that characterizes this wintry month. The blend of cold temperatures and moisture creates a serene yet brisk environment, making December a unique time to embrace the beauty of winter in Twin Falls.

December Temperature in Twin Falls

In December, Twin Falls experiences a chill that sets the stage for winter's embrace. With minimum temperatures dipping to -12°C (10°F) and average highs around 0°C (32°F), residents feel the distinct transition as the year draws to a close. The cold, however, is tempered by occasional peaks reaching up to 16°C (60°F), offering brief respites from the winter's grasp. This month marks a continuation of the downward trend from the milder months of fall, as the landscape transforms into a tranquil winter scene. The temperatures herald the arrival of snow, inviting both residents and visitors to enjoy the frosty beauty and various winter activities that Twin Falls has to offer.

December Weather in Twin Falls: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Twin Falls, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec313443505869797666504132
Data source: Temperature data for Twin Falls 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 Twin Falls

In Twin Falls, United States, December wraps up the year with a precipitation total of 39 mm (1.5 in), mirroring the rainfall seen in March and indicating a notable consistency in late-year moisture. With 8 days of measurable precipitation, December showcases a shift from the drier months of mid-summer, where July recorded a meager 5 mm (0.2 in) over just 1 day. The late fall to winter transition in December maintains a steady rhythm, reinforcing the trend of increasing precipitation as the region moves into the colder months. This uptick after a relatively dry summer emphasizes the importance of winter precipitation for replenishing water sources, ensuring that Twin Falls enters the new year with a solid foundation of moisture.

December Precipitation Trends in Twin Falls

The chart displays monthly precipitation patterns in Twin Falls, 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.
JanFebMarAprMayJunJulAugSepOctNovDec40463933391651016263239
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Twin Falls

December in Twin Falls, United States, typically sees a humidity level of 87%, marking a slight increase from the preceding month of November at 83%. This uptick reflects a trend observed throughout the year, where humidity levels tend to be higher during the winter months. As the year progresses from the dry summer of July and August, with their lowest humidity levels of 53% and 42% respectively, the fall months witness a gradual rise. By the time December rolls around, residents can expect a significant shift towards a more humid climate, reminiscent of the early months of the year, which experience humidity peaks of 91% in January and 92% in February. This seasonal pattern highlights Twin Falls' transition from dry heat to a cooler, more moisture-laden atmosphere as the year draws to a close.

December Average Humidity in Twin Falls

This chart illustrates the average monthly humidity levels in Twin Falls, 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%85%76%66%62%53%42%46%64%83%87%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Twin Falls

In December, Twin Falls experiences a UV Index of 3, indicating a moderate level of solar exposure. This marks a return to lower UV levels compared to the peak summer months, where indices soared to extremes of 11. With a burn time of 30 minutes, residents and visitors can enjoy outdoor activities with a reasonable sense of safety, albeit with some caution still advised. This downward trend is consistent as the year comes to a close, reflecting the seasonal shift in sunlight intensity. Just as the vibrant spring and summer offer higher UV levels, December provides a breather, allowing for more time outside before the need for sun protection resurfaces. For detailed insights on UV levels throughout the year, visit Twin Falls UV Index.

Maximum UV Index Levels in Twin Falls for December

The chart shows the monthly maximum UV Index (UVI) for Twin Falls 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.
JanFebMarAprMayJunJulAugSepOctNovDec3578101111109643
Data source: Twin Falls 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 Twin Falls

As the year draws to a close, December brings a gentle warmth to Twin Falls, with an average of 175 hours of sunshine. This marks a decline from the sun-drenched days of summer, where bright July boasts the highest sunshine hours at 391. The transition from the longer days of May and June, which enjoy over 300 hours of glorious light, showcases the region's distinct seasonal rhythm. By December, the sunshine is mellow yet comforting, creating a cozy atmosphere as the community prepares for the festive season. Despite the drop in light compared to the vibrant autumn months, December's sunshine still offers a hopeful glimpse of the bright days ahead.

Monthly Sunshine Duration in Twin Falls: December Highlighted

The December sunshine duration represents the total number of hours Twin Falls 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.
JanFebMarAprMayJunJulAugSepOctNovDec143h186h270h291h337h377h391h355h307h262h205h175h
Data source: Twin Falls December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Twin Falls During December

As December rolls in, Twin Falls experiences a noticeable dip in sunny weather, with a mere 35% chance of sunshine. This marks one of the lowest probabilities for sun throughout the year, trailing just behind January. The transition from the vibrant autumn months into winter brings about shorter days and a tendency for cloud cover to dominate the skies. Interestingly, this pattern is followed by an uptick in sunlight as winter progresses, with February offering a more optimistic 47% chance. Thus, while December may be a bit dreary, hope for brighter days is just around the corner as the new year approaches.

Percentage of Sunny Days in December in Twin Falls

The chart illustrates the percentage of sunny days in Twin Falls 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 Twin Falls experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec36%47%58%63%55%76%75%77%87%47%44%35%
Data source: Twin Falls December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Twin Falls in December

In Twin Falls, United States, the daylight hours showcase a dynamic progression throughout the year, reflecting the changing seasons. Starting strong in June, with a full 15 hours of sunlight, the days gradually shorten, reaching only 9 hours by both December and January. This trend of increasing light from February's 10 hours to April’s 13 hours paints a vivid picture of spring's arrival, while the summer peak slowly transitions into the shorter, cozy days of fall and winter. Despite December’s brief daylight, the promise of longer days returns as the year turns anew, reminding us of the cyclical beauty of nature. Whether basking in the long summer evenings or embracing the crispness of winter's shorter days, the shifting daylight hours invite us to appreciate each season’s unique charm.

Average Daylight Hours in Twin Falls for December

The chart illustrates the variation in daylight duration in Twin Falls throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 27m10h 33m11h 58m13h 24m14h 38m15h 14m14h 54m13h 48m12h 25m10h 59m9h 44m9h 5m
Data source: Twin Falls daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Twin Falls

As December sweeps into Twin Falls, the winds become a touch more spirited, averaging 3.8 m/s (8 mph). This marks a slight increase from the calmer breezes of November and aligns closely with the gusts experienced in the spring months. Interestingly, despite some fluctuations throughout the year, winter consistently brings a notable uptick in wind speed, reminding us of nature's lively character during the colder months. While the summer saw its lowest winds, December's gentle yet brisk breezes create a refreshing atmosphere, setting the stage for cozy winter days.

Average December Wind Speed in Twin Falls

The chart displays monthly wind speed patterns in Twin Falls, 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.
JanFebMarAprMayJunJulAugSepOctNovDec3.14.83.63.93.53.42.73.02.93.32.93.8 m/s
Data source: Twin Falls December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Twin Falls Compares to Other Months

The weather in Twin Falls 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 Twin Falls and find detailed weather information for every month.

December and January weather exhibit notable differences, particularly in temperature and humidity levels. December offers a milder average temperature of 0°C (32°F), with minimums dipping to -12°C (10°F), while January presents a harsher climate with a lower average of -1°C (31°F) and minimum temperatures plunging to -27°C (-16°F). Both months experience similar precipitation levels, around 39-40 mm (1.5-1.6 in), spread over 8 days. However, January is slightly more humid at 91% compared to December's 87%. For a more detailed look at the weather specifics in January, you can visit Twin Falls weather in January.

In December, temperatures in Twin Falls range from a minimum of -12°C (10°F) to a maximum of 16°C (60°F), with an average temperature hovering around freezing at 0°C (32°F). The month sees about 39 mm (1.5 in) of precipitation over 8 days and carries a humidity level of 87%. In contrast, February experiences slightly colder temperatures, with a minimum of -13°C (8°F) and a maximum of 18°C (64°F), leading to an average of 1°C (34°F). Precipitation increases to 46 mm (1.8 in) across 10 days, accompanied by a marginally higher humidity of 92%. For a detailed look at the weather conditions in February, you can check Twin Falls weather in February.

In December, temperatures can drop to a minimum of -12°C (10°F), with an average temperature around 0°C (32°F) and a maximum reaching 16°C (60°F). The month sees approximately 39 mm (1.5 in) of precipitation over about 8 days, coupled with high humidity at 87%. In contrast, March experiences slightly milder conditions, with minimum temperatures around -9°C (15°F), an average of 6°C (43°F), and maximums that can soar up to 25°C (78°F). Rainfall remains similar at 39 mm (1.5 in), although it occurs over 10 days, and humidity slightly decreases to 85%. For more details on March weather, you can check out Twin Falls weather in March.

In December, temperatures are notably colder, with lows averaging around -12°C (10°F) and a maximum of only 16°C (60°F), while April brings a more temperate climate, featuring minimum temperatures of -5°C (23°F) and highs reaching up to 31°C (89°F). Precipitation during both months is similar, with December receiving 39 mm (1.5 in) and April slightly less at 33 mm (1.3 in), but both months see precipitation on about 8 days. Additionally, the humidity in December is higher at 87%, compared to April’s 76%, making the latter feel considerably more pleasant. For a detailed look at the weather specifics for April, check out Twin Falls weather in April.

December and May exhibit stark differences in weather patterns. December typically experiences colder temperatures, with a minimum reaching -12°C (10°F) and an average of 0°C (32°F), while May enjoys milder conditions, with a minimum of -1°C (30°F) and an average of 15°C (59°F). Both months receive similar amounts of precipitation, approximately 39 mm (1.5 in), but December has slightly more rainy days at 8 compared to May's 7 days of rain. Additionally, December's humidity level is notably higher at 87%, in contrast to May's more comfortable 66%. For more detailed insights, check out Twin Falls weather in May.

December and June present strikingly different weather conditions. In December, temperatures typically range from a chilling minimum of -12°C (10°F) to a maximum of 16°C (60°F), with an average of around 0°C (32°F). This month sees quite a bit of precipitation, averaging 39 mm over about 8 days and a high humidity of 87%. In contrast, June boasts much warmer temperatures, with a minimum of 4°C (39°F) and soaring highs reaching up to 39°C (102°F), making the average a comfortable 21°C (70°F). Rainfall is significantly lower, averaging only 16 mm over just 2 days, accompanied by a more manageable humidity of 62%. For more details, check out Twin Falls weather in June.

December and July present a striking contrast in weather conditions. In December, temperatures can plunge to a minimum of -12°C (10°F) with an average of around 0°C (32°F) and a maximum reaching 16°C (60°F). The month experiences significant humidity at 87%, along with 39 mm (1.5 in) of precipitation spread over about 8 days. In stark comparison, July boasts a much milder atmosphere, with minimum temperatures of 8°C (48°F) and a comfortable average of 26°C (80°F), peaking at a sweltering 40°C (104°F). Additionally, July sees only minimal precipitation of 5 mm (0.2 in) over just 1 day and a lower humidity level of 53%. For more insights into the distinctly warm climate of July, you can check out Twin Falls weather in July.

December and August present stark contrasts in weather. December boasts average temperatures hovering around 0°C (32°F), with nighttime lows dipping to -12°C (10°F) and occasional highs reaching 16°C (60°F). It also experiences significant humidity at 87% and about 39 mm (1.5 in) of precipitation over 8 days. In contrast, August is warm and dry, showcasing an impressive average temperature of 25°C (76°F), with lows of 6°C (42°F) and highs soaring up to 41°C (106°F). Precipitation is minimal, with only 10 mm (0.4 in) over just 2 days and much lower humidity at 42%. For more details on the summer climate, visit Twin Falls weather in August.

When comparing the weather in December to that of September, significant differences emerge. December experiences colder temperatures, with a minimum of -12°C (10°F) and an average of 0°C (32°F), contrasting sharply with September's milder minimum of 1°C (35°F) and a much warmer average of 19°C (66°F). The maximum temperature in December reaches only 16°C (60°F), while September can soar to a sweltering 39°C (103°F). Additionally, December sees more precipitation, totaling 39 mm (1.5 in) across about 8 days, compared to September's lighter 16 mm (0.6 in) over just 2 days. The humidity also differs greatly, with December at 87% and September at a drier 46%. For more detailed insights, visit Twin Falls weather in September.

In December, temperatures drop significantly, with a minimum of -12°C (10°F) and an average temperature of 0°C (32°F), while in October, temperatures are milder, ranging from a minimum of -12°C (10°F) to a maximum of 30°C (87°F) and an average of 10°C (50°F). December also experiences higher humidity at 87% and more frequent precipitation, averaging 39 mm over 8 days, compared to October's 26 mm over just 4 days. This shift highlights a stark contrast in weather patterns between the two months. For a more detailed look at October's conditions, you can check out Twin Falls weather in October.

In comparing the weather between November and December, December tends to be colder, with average temperatures hovering around 0°C (32°F), while November experiences milder conditions with an average of 5°C (41°F). Additionally, December sees a wider temperature range, with a minimum of -12°C (10°F) compared to November's minimum of -9°C (16°F) and a maximum of only 16°C (60°F) versus November's higher maximum of 24°C (75°F). Precipitation is slightly higher in December at 39 mm (1.5 in) over 8 days, while November has 32 mm (1.2 in) over 7 days. The humidity levels in December are marginally higher at 87%, compared to November's 83%. For a more detailed look at the weather patterns, you might find Twin Falls weather in November useful.

Compare Twin Falls's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in Twin Falls

As December rolls into Twin Falls, the weather takes a distinct turn, offering a unique winter experience compared to other months. With chilly temperatures averaging around 0°C and the potential drop to a brisk -12°C, this month is marked by its cold snap that contrasts sharply with the warmer months of the year. Additionally, December brings a higher humidity level, making the air feel even cooler, while the precipitation—averaging 39 mm—often manifests as light snow or rain over a handful of days. This combination of elements sets the stage for a cozy, wintry vibe that invites residents and visitors alike to embrace the season. For a deeper dive into what makes Twin Falls’ climate so unique, check out Twin Falls Climate.