Last updated: February 24, 2025
December in Thermopolis, Wyoming is characterized by a striking contrast in temperatures, with a maximum of 18°C (65°F) tempered by a chilly average of -4°C (24°F) and a potential drop to a frigid minimum of -25°C (-12°F). This month sees a modest precipitation amount of 14 mm (0.6 in), spread across four days, contributing to the landscape's serene winter beauty. With humidity levels at a high 89%, the air is crisp and invigorating, making December a month of stark yet captivating weather patterns in this tranquil corner of the United States.
In Thermopolis, United States, December marks a notable chill as winter settles in, with temperatures dipping to a minimum of -25°C (-12°F). The month features an average temperature of -4°C (24°F), illustrating the stark contrast to the warmer months preceding it. However, December also offers glimpses of warmth, with a maximum temperature reaching 18°C (65°F), just enough to remind residents of the more temperate days of fall. As the coldest month of the year approaches, Thermopolis transitions from the mild temperatures of November, where averages hover around 1°C (35°F), to a more frigid climate in January, hinting at the severity of winter that lies ahead. The gradual drop in temperatures from the previous months is evident, setting the stage for snowy landscapes and the cozy charm of the holiday season.
In December, Thermopolis experiences a moderate precipitation amount of 14 mm (0.6 in), occurring over approximately 4 days. This month typically sees a decline in rainfall compared to the wetter earlier months, with precipitation peaking in May at 67 mm (2.6 in) and gradually tapering off as winter approaches. This trend highlights a noticeable shift from the bustling moisture of spring and summer to the drier, crisper conditions of late fall and early winter. By December, the landscape is often dusted in snow rather than drenched in rain, contributing to a serene winter atmosphere that characterizes this charming Wyoming town.
In Thermopolis, United States, December brings a notable increase in humidity, measuring 89%, resembling the levels seen in the preceding months of January and November. This trend suggests a return to the moisture-laden air characteristic of winter, particularly after experiencing a gradual decline during the warmer months, where humidity dipped to a low of 59% in both August and September. As the temperatures drop, the air becomes heavier with moisture, creating a stark contrast to the drier summer months. Overall, December’s humidity reflects the cyclical nature of the region's climate, reminding residents of winter’s embrace just before the onset of the new year.
In December, Thermopolis experiences a moderate UV Index of 3, indicating that sun exposure is relatively safe for most individuals, with a burn time of about 30 minutes. As the year winds down, UV levels decrease from the peaks seen in the summer months, offering a reprieve from the extreme conditions of June and July, which both reached an index of 11. This trend of declining UV radiation from late fall to early winter underscores the importance of adapting sun safety practices throughout the year. As you enjoy the crisp December air, remember that while the UV Index is lower, it's still wise to remain mindful of sun exposure. For more information on UV levels throughout the year, visit Thermopolis UV Index.
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December in Thermopolis, United States, brings a gentle descent in sunshine, with 216 hours illuminating the month. As the year draws to a close, this marks a slight dip from the vibrant November sun, yet still outshines the early winter months of January and February. Interestingly, December's sunshine reflects the overall trend of gradually increasing daylight as the days lengthen toward spring. Though the days may be shorter than the peak summer hours of sunshine experienced in June and July, December still holds onto the warmth of lingering fall light, creating a cozy atmosphere perfect for holiday festivities amidst the breathtaking Wyoming landscape.
In December, Thermopolis, United States enjoys a 50% chance of sunny weather, a figure that closely mirrors the trends seen in the preceding months. While the likelihood of sunshine drops from the peak summer months of June to August, which boast a sunny probability of around 65%, December maintains a notable balance, aligning with the generally transitional weather patterns of late fall and early winter. Interestingly, this wintry month presents a slight rebound from November's lower 44% chance of sun, indicating that while dark clouds may gather, the sun is certainly not absent. Overall, December's weather in Thermopolis tends to offer a mix of cloud and sun, allowing residents to enjoy those rare, bright winter days.
December in Thermopolis, United States, marks the transition into shorter days, with only 8 hours of daylight. This decline begins in late autumn as the days shrink from a peak of 15 hours of sunlight in June and July. As the year progresses from January's 9 hours to December's 8 hours, a clear trend emerges: the gradual reduction in daylight leads into the winter months, prompting a cozy atmosphere that encourages indoor activities and festive gatherings. However, as the year turns, the promise of longer days looms on the horizon, heralding the return of sunlight in January, which will begin to wax again, providing a guiding light for the upcoming spring.
As December settles in Thermopolis, a noticeable shift in the breeze reveals itself, with average wind speeds reaching 3.1 m/s (7 mph). This uptick marks a slight increase from the preceding months, reflecting a trend where winter often brings livelier winds compared to the more tranquil summer days. While January and November hover around 2.4 m/s (5 mph), this winter momentum adds a crispness to the air, making December one of the windiest months of the year. Notably, the gradual rise in wind speed through the fall culminates in this robust December gust, suggesting a transition into the colder months that brings with it a fresh, invigorating atmosphere ideal for seasonal festivities.
The weather in Thermopolis 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 Thermopolis and find detailed weather information for every month.
In comparing the weather between December and January, January typically presents colder temperatures, with a minimum reaching -29°C (-20°F) compared to December's -25°C (-12°F). The average temperature during January is slightly lower at -6°C (21°F), in contrast to December's average of -4°C (24°F). Precipitation also decreases, with January recording only 11 mm (0.4 in) over 2 days, while December experienced 14 mm (0.6 in) over 4 days. Humidity remains relatively high in both months, with January averaging 90% and December at 89%. For more detailed information, check Thermopolis weather in January.
In comparing the weather of December and February, we observe some notable differences and similarities. Both months experience a minimum temperature of around -25°C (-12°F to -13°F), indicating consistently frigid conditions. However, February tends to be slightly colder on average, with temperatures around -6°C (21°F) compared to December's average of -4°C (24°F). Additionally, February sees a little more precipitation, totaling 21 mm (0.8 in) over six days, which is higher than December's 14 mm (0.6 in) over four days. Despite these variations, both months maintain high humidity levels at 89%. For more detailed information, you can explore Thermopolis weather in February.
In December, temperatures can drop as low as -25°C (-12°F), with an average of -4°C (24°F) and a maximum of 18°C (65°F). The month features 14 mm (0.6 inches) of precipitation over about four days, accompanied by high humidity levels of 89%. In contrast, March sees slightly colder minimum temperatures at -27°C (-16°F), but enjoys a higher average of 3°C (37°F) and a maximum of 24°C (76°F). Precipitation increases to 22 mm (0.9 inches) over five days, while humidity decreases slightly to 82%. For more detailed insights into March weather, you can check Thermopolis weather in March.
December and April present stark contrasts in weather conditions. In December, temperatures can plummet as low as -25°C (-12°F) with an average of -4°C (24°F), while the maximum temperature reaches 18°C (65°F). The month experiences limited precipitation, totaling 14 mm (0.6 inches) over just four days, coupled with high humidity at 89%. In contrast, April sees a notable warming trend, with minimum temperatures around -15°C (5°F) and average temperatures at 7°C (44°F), peaking at 27°C (80°F). The month is wetter, receiving 53 mm (2.1 inches) of precipitation over nine days, and humidity decreases to 72%. For more insights into April weather, visit Thermopolis weather in April.
December and May exhibit stark contrasts in weather conditions. In December, temperatures can plummet to a chilling minimum of -25°C (-12°F), with an average temperature of -4°C (24°F) and occasional highs reaching up to 18°C (65°F). The month experiences relatively low precipitation, totaling 14 mm (0.6 in) over just 4 days, but the humidity remains high at 89%.
In comparison, May brings a substantial warming trend, with temperatures ranging from a minimum of -4°C (25°F) to an average of 12°C (54°F) and maximums soaring to 31°C (88°F). This month also sees increased rainfall, accumulating to 67 mm (2.6 in) over 10 days, while the humidity decreases to a more comfortable 69%. For more specific insights regarding May weather, you can check out Thermopolis weather in May.
The weather in December and June presents a stark contrast, showcasing the extremes of winter and summer. In December, temperatures can plummet to as low as -25°C (-12°F), with an average of -4°C (24°F) and a maximum of 18°C (65°F). The month experiences relatively low precipitation at 14 mm (0.6 in) over about four days, coupled with high humidity at 89%. In stark comparison, June boasts milder conditions, with minimum temperatures around 1°C (35°F), an average of 20°C (68°F), and highs reaching a sweltering 39°C (103°F). Precipitation increases to 27 mm (1.1 in) over six days, and humidity decreases to a more comfortable 67%. For a closer look at the typical weather patterns for June, check out Thermopolis weather in June.
December and July weather present a striking contrast. In December, temperatures can plummet as low as -25°C (-12°F), with an average around -4°C (24°F) and occasional highs reaching 18°C (65°F). The month sees about 14 mm (0.6 in) of precipitation over 4 days, accompanied by high humidity at 89%. In contrast, July enjoys much milder conditions, with temperatures ranging from a minimum of 7°C (44°F) to a scorching maximum of 40°C (104°F), and an average temperature of 24°C (76°F). Precipitation is slightly lower at 13 mm (0.5 in) over only 2 days, and humidity drops to a more comfortable 65%. For more details on July weather, see Thermopolis weather in July.
December and August present contrasting weather patterns. In December, temperatures can plunge to a minimum of -25°C (-12°F) and average around -4°C (24°F), while August boasts much milder conditions with an average of 22°C (72°F) and highs reaching up to 38°C (100°F). Precipitation is relatively low in both months, with December receiving 14 mm (0.6 in) over 4 days and August slightly higher at 18 mm (0.7 in), but spread over just 3 days. Additionally, December's high humidity at 89% contrasts sharply with the drier August air at 59%. For more details on August weather, you can check Thermopolis weather in August.
In comparing the weather between December and September, we see a stark contrast in temperatures and conditions. December experiences frigid temperatures, with a minimum plunge to -25°C (-12°F) and an average around -4°C (24°F), while September boasts a much milder climate, featuring a minimum of -4°C (24°F) and a warm average of 17°C (62°F). Furthermore, September can reach highs of up to 37°C (100°F), showcasing its summer warmth, in stark contrast to December's maximum of only 18°C (65°F). In terms of precipitation, December sees 14 mm (0.6 in) spread over 4 days, while September has a slightly higher total of 27 mm (1.0 in) over just 3 days, accompanied by a noticeably lower humidity of 59%. For more detailed insights on weather patterns, check out Thermopolis weather in September.
December weather is characterized by significantly colder temperatures compared to October, with averages dropping to around -4°C (24°F) and occasional highs reaching 18°C (65°F). In contrast, October sees a milder range, featuring minimums of -22°C (-8°F) and maximums that can climb to 28°C (83°F). Precipitation is also more pronounced in October, with 27 mm (1.1 in) over 6 days, compared to December's lighter total of 14 mm (0.6 in) over just 4 days. Furthermore, December experiences higher humidity levels at 89%, unlike October’s 69%. For a more in-depth look at October conditions, you can find additional details here: Thermopolis weather in October.
December weather is notably colder than November, with average temperatures dropping from 1°C (35°F) in November to a chilly -4°C (24°F) in December. The minimum temperatures also reflect this significant shift, going from -16°C (4°F) in November to a stark -25°C (-12°F) in December. While both months see similar levels of precipitation, with December at 14 mm (0.6 in) and November at 17 mm (0.7 in), December's higher humidity of 89% compared to November's 83% adds to the biting cold. For more detailed insights on November's weather patterns, you can check Thermopolis weather in November.
December in Thermopolis stands out with its crisp chill and notable variance in temperatures, transitioning from the mildness of autumn to the bite of winter. With an average temperature hovering around -4°C, it contrasts sharply against the warmer months, where comfortable highs and balmy evenings are more common. The month is marked by significant humidity levels reaching 89%, creating a damp atmosphere on the rare occasions when precipitation occurs. This year's December, with only a handful of rainy days, offers a stark reminder of nature’s quiet beauty in winter, making it a unique month. For more insights into the climate patterns throughout the year, visit Thermopolis Climate.