Last updated: February 24, 2025
In December, Decorah, United States experiences a striking range of temperatures, with a maximum of 20°C (68°F) and a chilling minimum plunging to -23°C (-9°F), revealing the month’s atmospheric extremes. The average temperature hovers around -3°C (28°F), providing a frosty backdrop for the season. Precipitation is modest, totaling 38 mm (1.5 in) over 6 days, and the air is imbued with a notable 82% humidity, adding to the wintry feel. This combination of factors results in a classic December climate that showcases both the beauty and challenges of winter in Decorah.
In December, Decorah experiences a notable drop in temperatures, with minimums dipping to -23°C (-9°F). The average temperature hovers around a brisk -3°C (28°F), while daytime highs reach a mild 20°C (68°F). This month marks a stark contrast to the warmer fall, as it transitions the region firmly into winter. Notably, December stands out with its chilly nights, yet it still offers glimpses of warmth during the day, highlighting the seasonal variability that characterizes Decorah's weather. The blend of frigid lows and more temperate highs speaks to the beauty of winter landscapes, inviting residents and visitors alike to embrace the cold with festive cheer.
In Decorah, December marks the gradual transition into winter, with precipitation levels dropping to 38 mm (1.5 inches), comparable to January's totals. Typically, December experiences around 6 days of rainfall, making it one of the drier months as the region prepares for colder temperatures. This pattern is a shift from the wetter months earlier in the year, such as May, which sees a significant 155 mm (6.1 inches). The overall trend illustrates a dip in precipitation as winter approaches, creating a serene atmosphere as snow occasionally blankets the area. As the year concludes, Decorah's precipitation levels reflect a consistent pattern of decreasing rainfall, paving the way for the frosty beauty of the season ahead.
In Decorah, United States, December brings a notable shift in humidity levels, with an average of 82%. This figure is a slight decrease from the peak seen in November at 88%, yet it maintains a higher level compared to much of the warmer months. The trend reveals a gradual decline in humidity from the oppressive 85% in February through to the drier summers, reaching a low of 69% in August. As the seasons transition back to winter, humidity levels rise again, reflecting the characteristic moisture associated with colder months. This cyclical pattern highlights Decorah's humid climate, particularly during the long winter, setting a cozy backdrop for the holiday season.
As December rolls into Decorah, the UV Index dips to a low of 2, marking a shift in sun exposure patterns after the intense levels of summer. With this minimal UV presence, residents can enjoy a more leisurely burn time of 45 minutes, a welcome relief from the 15 minutes needed during the peak months of April through August. This trend signifies a gradual decrease in UV intensity from the prior months, allowing for safer outdoor activities without the urgency for sunscreen. As winter approaches, the emphasis shifts from sun protection to more cozy pursuits, though it's still wise to stay informed about the sun's rays. For more details on outdoor safety and UV levels this month, check out the Decorah UV Index.
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As the year draws to a close, December in Decorah, United States, serves as a gentle reminder that even amid the chill, sunshine remains a prominent companion. With 180 hours of sunlight gracing the month, December may not be the sunniest by a long shot, but it maintains a vibrant connection to the brighter months that preceded it. Notably, the sunshine hours see a gradual rise from the dim winter days of January to the moderate brightness experienced in the spring. This trend underscores a rhythm of seasonal change, where the daylight begins its slow but steady return, hinting at the hopeful lengths ahead. Despite the colder temperatures, the consistent presence of sunlight in December offers a subtle warmth, inviting residents to embrace the beauty of winter in Decorah.
In December, Decorah experiences a 36% chance of sunny weather, a slight dip compared to the more favorable months of late summer and early fall, where sun probability peaks between 57% and 63%. As the year progresses from January’s chilly 25%, there's a gradual increase in sunshine, peaking in late summer. However, as winter fully sets in, this likelihood decreases again, hovering around the mid-thirties. This trend showcases Decorah's seasonal shift, where residents can anticipate a mix of overcast days and occasional sunny breaks amidst the winter chill.
As December sets in, Decorah witnesses a soothing return to the shorter days, with daylight lasting around 9 hours—a reflection of the season's tranquility. This pattern aligns closely with the preceding months of November and October, where daylight also hovers around the 9 to 10 hour mark. However, the end of the year marks the culmination of a gradual decline from the summer peak in June, which enjoyed a generous 15 hours of daylight. The transition from the vibrant, sunlit months of late spring and early summer encourages a cozy atmosphere, inviting residents to embrace the winter season while anticipating the return of longer days come March.
As December settles in Decorah, the landscape feels a familiar shift with average wind speeds reaching 4.2 m/s (9 mph). This marks a slight decrease from the brisk winds of November, which recorded the highest speeds of the year at 4.5 m/s (10 mph). Interestingly, December's winds mirror those seen earlier in March and April, suggesting an end-of-year transition where the gusts pick up again before winter's chill fully takes hold. Overall, December's winds are a testament to the region’s shifting climate, balancing cocooning warmth and the crisp edge of winter.
The weather in Decorah 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 Decorah and find detailed weather information for every month.
December tends to be milder than January, with average temperatures around -3°C (28°F) compared to January's chillier average of -7°C (20°F). December also sees a maximum temperature of 20°C (68°F), whereas January peaks at a much lower 11°C (51°F). Precipitation levels are similar in both months—38 mm (1.5 in) in December and 39 mm (1.5 in) in January—though January typically experiences slightly more rainy days, averaging 7 days compared to December's 6. The humidity is also slightly higher in January at 84%, compared to December's 82%. For those interested in further details, you can check out Decorah weather in January.
December and February showcase some notable differences in weather conditions. In December, temperatures range from a minimum of -23°C (-9°F) to a maximum of 20°C (68°F), with an average of -3°C (28°F). This month sees about 38 mm (1.5 in) of precipitation over approximately six days and maintains a humidity level of 82%. In contrast, February is noticeably colder with minimum temperatures plummeting to -34°C (-28°F) and an average of -7°C (20°F), while the maximum reaches 18°C (65°F). Precipitation increases to 52 mm (2.0 in) over eight days, and humidity rises slightly to 85%. For a detailed look at the weather specifics, you can check Decorah weather in February.
In December, temperatures typically range from a minimum of -23°C (-9°F) to a maximum of 20°C (68°F), with an average of -3°C (28°F). The month sees about 38 mm (1.5 in) of precipitation over an average of 6 days, and humidity levels hover around 82%. In contrast, March brings slightly colder conditions with minimum temperatures dropping to -25°C (-12°F), while maximum temperatures reach up to 21°C (69°F) and the average rises to 2°C (35°F). Precipitation increases to 64 mm (2.5 in) over approximately 8 days, with humidity slightly higher at 84%. For more detailed insights about weather trends, you can check Decorah weather in March.
December and April present stark contrasts in weather conditions. In December, temperatures typically range from a chilly minimum of -23°C (-9°F) to a maximum of 20°C (68°F), with an average temperature of -3°C (28°F). Precipitation is relatively low at 38 mm (1.5 in) over about 6 days, resulting in a humid atmosphere with 82% humidity.
In contrast, April sees a notable increase in temperatures—ranging from a minimum of -11°C (13°F) to a maximum of 26°C (80°F), with an average of 7°C (45°F). The month is wetter, receiving approximately 80 mm (3.2 in) of precipitation spread across 10 days, while humidity levels slightly rise to 83%. For more detailed insights, you can check out Decorah weather in April.
December and May contrast significantly in terms of weather conditions. December features chilly temperatures, with a minimum as low as -23°C (-9°F) and average readings around -3°C (28°F), while the maximum can reach up to 20°C (68°F). In this winter month, precipitation is relatively low, totaling 38 mm (1.5 in) over about 6 days, accompanied by high humidity at 82%. In stark contrast, May brings milder temperatures, with a minimum of -2°C (29°F) and an average of 15°C (59°F), peaking at a warm 33°C (92°F). This month is also much wetter, with precipitation reaching 155 mm (6.1 in) spread across 15 days, along with a lower humidity level of 75%. For more detailed weather patterns, you can visit Decorah weather in May.
December weather is characterized by frigid temperatures, ranging from a minimum of -23°C (-9°F) to a mild maximum of 20°C (68°F), with an average temperature of -3°C (28°F). The month sees relatively low precipitation, totaling 38 mm (1.5 in) over 6 days, and high humidity at 82%. In contrast, June offers a much warmer climate, with temperatures varying from a minimum of 8°C (48°F) to a scorching maximum of 35°C (95°F) and an average of 22°C (71°F). However, June is also considerably wetter, receiving 130 mm (5.1 in) of precipitation over 11 days, while maintaining a slightly lower humidity at 79%. For a closer look at what to expect during June, check out Decorah weather in June.
In December, the weather is notably frigid, with temperatures ranging from a chilling minimum of -23°C (-9°F) to a maximum of 20°C (68°F), averaging around -3°C (28°F). This month experiences relatively low precipitation, with about 38 mm (1.5 in) spread over six days and high humidity levels at 82%. In stark contrast, July brings warmth, with temperatures ranging from a comfortable minimum of 11°C (53°F) to a hot maximum of 34°C (93°F), averaging 23°C (74°F). While it sees more precipitation at 106 mm (4.2 in) over ten days, the humidity is slightly lower at 75%. For more detailed weather trends, you can refer to Decorah weather in July.
December and August present stark contrasts in weather conditions. In December, temperatures can plummet to a minimum of -23°C (-9°F) and average around -3°C (28°F), while August enjoys a much milder climate with minimum temperatures starting at 10°C (51°F) and average highs reaching 21°C (70°F). Furthermore, December experiences considerably lower precipitation at 38 mm (1.5 in) over 6 days, in contrast to August's 109 mm (4.3 in) spread across 10 days. The humidity levels also differ, with December maintaining a higher average of 82% compared to August's 69%. For a deeper look at August's weather, you can explore Decorah weather in August.
When comparing the weather in December and September, it's evident that these months present starkly different climatic conditions. December features much colder temperatures, with a minimum of -23°C (-9°F) and an average of -3°C (28°F), while September enjoys milder temperatures ranging from a minimum of 2°C (35°F) to a comfortable average of 18°C (65°F). Additionally, September experiences significantly higher precipitation, totaling 123 mm (4.8 in) over 10 days, compared to December's 38 mm (1.5 in) spread over just 6 days. Humidity levels are also slightly higher in December at 82%, compared to September's 74%. For a more detailed look at September's weather, you can visit Decorah weather in September.
In December, temperatures are notably colder, with a minimum reaching as low as -23°C (-9°F) and an average of -3°C (28°F), while the maximum temperature can still climb to a mild 20°C (68°F). In contrast, October experiences milder conditions, with a minimum of -7°C (20°F) and an average of 10°C (50°F), peaking at a warm 30°C (86°F). Precipitation is significantly higher in October at 133 mm (5.2 in) over 11 days, compared to December's 38 mm (1.5 in) across 6 days. However, December has a slightly higher humidity level at 82%, compared to October's 79%. For a detailed look at how October weather unfolds in Decorah, you can visit Decorah weather in October.
In comparing the weather between November and December, December brings colder temperatures with a minimum of -23°C (-9°F) and an average of -3°C (28°F). In contrast, November experiences milder conditions, with a minimum temperature of -16°C (3°F) and an average of 2°C (35°F). While both months have similar maximum temperatures, December's max reaches 20°C (68°F) compared to November's 22°C (72°F). Notably, December experiences slightly less precipitation at 38 mm (1.5 in) over 6 days, while November records 53 mm (2.1 in) over 7 days. Humidity levels are also higher in November at 88%, compared to December's 82%. For a closer look at November's weather specifics, you can visit Decorah weather in November.
As December settles in, Decorah experiences a notable shift in weather patterns, with temperatures dipping considerably compared to the milder months prior. The chill is palpable, averaging around -3°C (28°F), and the minimums can plunge as low as -23°C (-9°F), bringing a stark contrast to the year's warmer periods. With a humidity level of 82%, the air feels heavier, often accompanied by 38 mm (1.5 in) of precipitation over about 6 days of the month. This combination of cold temperatures and moisture not only sets the scene for a picturesque winter landscape but also highlights December’s unique climatic personality. For a deeper dive into the annual variations, be sure to explore the detailed insights at Decorah Climate.