Last updated: February 24, 2025
December in Calistoga, United States, presents a charming winter experience, characterized by a maximum temperature of 23°C (74°F) and an average temperature of 9°C (49°F). Nights can be quite chilly, with temperatures dipping as low as -1°C (30°F). This month sees a total precipitation of 95 mm (3.7 in) over approximately 8 days, contributing to a notably high humidity level of 84%. Residents and visitors can enjoy the refreshing crispness of December, balanced by the cozy warmth of winter gatherings.
In December, Calistoga's temperatures begin to dip, revealing the area's transition into winter. The month features a minimum of -1°C (30°F) during the chillier nights, with average daytime highs reaching around 9°C (49°F). While it's still relatively mild compared to colder regions, December showcases a distinct coolness, peaking at 23°C (74°F) on warmer afternoons. This gradual drop from the warmer autumn months sets the stage for the seasonal charm of Calistoga, making it an enticing time for visitors seeking a serene escape amid picturesque winter landscapes.
December ushers in a considerable increase in precipitation for Calistoga, with 95 mm (3.7 in) of rainfall recorded over 8 days. This uptick marks a notable contrast to the drier summer months, where precipitation fell to zero in both July and August. As the year concludes, the weather shifts, leading to rainfall that is heavier than the previous month's total of 51 mm (2.0 in). Interestingly, while March showcases the highest number of rainy days at 10, December's rainfall is a reminder of the approaching winter season, setting the stage for the year’s final climatic push. This seasonal transition underscores the region's characteristic wet spell, something that is eagerly anticipated by local vineyards and nature lovers alike.
In Calistoga, December brings a noticeable humidity level of 84%, mirroring November's moisture-laden atmosphere. This time of year marks the return of higher humidity after the drier summer months, as levels gradually rise from a low of 66% in August. This late-autumn trend highlights a consistent pattern where humidity generally decreases from the beginning of the year, with January's peak at 86%, and then starts to climb back up as winter approaches. As December sets in, residents can expect a damp and refreshing environment, characteristic of the region’s climate transitioning into the cooler, wetter months.
As December arrives in Calistoga, the UV Index dips to a mild 3, reflecting a moderate exposure level reminiscent of earlier winter months. This lower index indicates a burn time of 30 minutes, allowing residents and visitors to enjoy the outdoors with a reduced risk of sunburn. Following a seasonal trend, the UV Index has steadily decreased from the extreme levels of summer, where indices peaked at 11 in both June and July, to more manageable figures in the latter part of the year. This pattern emphasizes the importance of adapting sun safety routines as the year progresses. For more details on the UV Index throughout the year, visit Calistoga UV Index.
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December in Calistoga brings a gentle retreat from the bright intensity of earlier months, as the sunshine hours gracefully taper off to 185 hours. This decline follows a vibrant summer peak in July, where the sun shines for an impressive 394 hours, enveloping the town in warm light. From January's modest 141 hours to the lively 357 hours of May, each month contributes to a sun-drenched journey that peaks in June. As the year edges toward winter, the sun slips gradually, marking a transition from bright, joyous summer days to the cooler, more subdued light of December. Despite the shorter days, the lingering warmth of the sun continues to paint Calistoga in soft hues, inviting visitors to slow down and savor the serene beauty of the season.
In Calistoga, the likelihood of sunny weather shows a distinct seasonal trend throughout the year. As we move from the colder months of January, where sunshine graces only 37% of the days, to the delightful warmth of May and June, which enjoy a remarkable 85% to 88% sunshine probability, it's clear that the sun makes a gradual return. However, December finds itself at the lower end of this spectrum once again, with a 35% chance of sunny days. This reflects a significant dip from the more sun-drenched months, signaling that while the festive season may be merry, it often comes wrapped in clouds.
In Calistoga, the daylight duration in December mirrors the earlier winter months, offering about 9 hours of sunlight each day. This marks a cycle of gradual decrease, starting from the long days of May to July, which provide up to 14 hours of daylight. As the seasons shift, the days gradually shorten, with December reflecting the culmination of this trend. Following December, daylight begins its slow ascent, fostering the promise of longer days in the coming months. The rhythm of daylight in Calistoga beautifully encapsulates the seasonal transitions, inviting residents and visitors alike to embrace both the depths of winter and the impending renewal of spring.
As December settles in Calistoga, the average wind speed remains consistent at 1.8 m/s (4 mph), echoing the gentle breezes of late summer and autumn. This month, like November with its slightly reduced 1.4 m/s (3 mph), reflects a noticeable drop in wind intensity compared to the spring peaks, where wind speeds reached up to 2.5 m/s (6 mph) in May. With overall mild winds throughout the year, December's breeziness wraps the town in a serene calm, inviting residents and visitors alike to embrace the tranquil beauty of the season. The subtle shift in wind patterns suggests a cozy winter lull, offering a peaceful backdrop to the holiday festivities that characterize this charming Napa Valley community.
The weather in Calistoga 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 Calistoga and find detailed weather information for every month.
In December, temperatures in Calistoga range from a minimum of -1°C (30°F) to a maximum of 23°C (74°F), with an average temperature of 9°C (49°F). The month experiences around 95 mm (3.7 in) of precipitation over 8 days, and humidity levels sit at 84%. In contrast, January sees a slight increase in maximum temperature, reaching up to 25°C (77°F) while maintaining the same minimum of -1°C (30°F) and average temperature of 9°C (49°F). However, precipitation rises significantly to 137 mm (5.4 in) over the same number of rainy days, with humidity slightly higher at 86%. For more detailed information on weather patterns, check out Calistoga weather in January.
December and February exhibit some notable differences in weather patterns. In December, temperatures range from a minimum of -1°C (30°F) to a maximum of 23°C (74°F), with an average of 9°C (49°F). The month sees about 95 mm (3.7 in) of precipitation over 8 days, maintaining a high humidity level of 84%. In contrast, February has a slightly cooler minimum temperature of -3°C (27°F) and a higher maximum of 27°C (80°F), with an average temperature of 10°C (51°F). Precipitation increases to 141 mm (5.6 in) over just 7 days, while humidity remains consistent at 84%. For more details on the weather conditions during this period, check Calistoga weather in February.
In comparing the weather of December and March, both months exhibit a similar minimum temperature of around -1°C (30°F), but March tends to be slightly warmer on average, with an average temperature of 11°C (53°F) compared to December's 9°C (49°F). March also boasts a higher maximum temperature, reaching up to 29°C (85°F), while December peaks at 23°C (74°F). Precipitation levels are relatively consistent between the two months, with December recording 95 mm (3.7 in) over 8 days and March experiencing slightly less at 92 mm (3.6 in) over 10 days. Humidity remains fairly comparable, at 84% in December and 83% in March. For a detailed look at the weather specifics, check out Calistoga weather in March.
When comparing the weather in December and April, a noticeable shift in temperature and precipitation is evident. December features a broader temperature range, with lows dipping to -1°C (30°F) and highs reaching up to 23°C (74°F), while April generally experiences milder temperatures, with a minimum of 2°C (36°F) and maximum of 33°C (92°F). Precipitation also differs significantly; December sees 95 mm (3.7 in) over approximately 8 days, whereas April is much drier, with only 39 mm (1.5 in) across just 5 days. Additionally, humidity levels are slightly higher in December at 84%, compared to 80% in April, contributing to a more humid atmosphere during the winter month. For more detailed insights, you can check Calistoga weather in April.
December and May present a striking contrast in weather conditions. December experiences cooler temperatures, with a minimum of -1°C (30°F) and an average of 9°C (49°F), reaching a maximum of 23°C (74°F). This month also sees significant precipitation, totaling 95 mm (3.7 in) over about 8 days, along with high humidity levels at 84%. In contrast, May showcases warmer and more pleasant weather, featuring a minimum of 4°C (39°F) and an average of 18°C (64°F), with highs soaring up to 37°C (99°F). Rainfall in May is notably lower, at just 23 mm (0.9 in) over approximately 3 days, and the humidity slightly decreases to 80%. For more details, check out Calistoga weather in May.
In December, the weather is characterized by cooler temperatures, with a minimum of -1°C (30°F) and an average of 9°C (49°F), peaking at a maximum of 23°C (74°F). This month also sees a higher level of precipitation, recording 95 mm (3.7 in) over 8 days and a humidity level of 84%. In stark contrast, June boasts significantly warmer conditions, with temperatures ranging from a minimum of 9°C (49°F) to a scorching maximum of 42°C (107°F) and an average of 22°C (72°F). Moreover, June experiences very little rainfall, with only 2 mm (0.1 in) spread over 0 days and a lower humidity level of 76%. The differences between these two months highlight a notable shift from winter chill to summer warmth. For more details on June weather, you can visit Calistoga weather in June.
In December, weather conditions are significantly cooler, with temperatures ranging from a minimum of -1°C (30°F) to a maximum of 23°C (74°F), complemented by average temperatures around 9°C (49°F). This month also sees considerable rainfall, with 95 mm (3.7 in) of precipitation over about 8 days, and a high humidity level of 84%. In contrast, July experiences much warmer and drier conditions, with temperatures ranging from a minimum of 12°C (53°F) to soaring highs of 40°C (105°F) and an average temperature of 23°C (74°F). Notably, July is marked by complete dryness, receiving no precipitation, and lower humidity at 70%. For more details on July's weather, you can explore Calistoga weather in July.
December and August present stark contrasts in weather. In December, temperatures range from a chilly minimum of -1°C (30°F) to a comfortable average of 9°C (49°F), with a peak reaching 23°C (74°F). The month is marked by higher precipitation, averaging 95 mm (3.7 in) over about 8 days, and a humidity level of 84%. In contrast, August boasts much warmer temperatures, with a minimum of 11°C (52°F) and an average of 23°C (73°F) rising to a scorching maximum of 41°C (106°F). Notably, it experiences no rainfall, registering 0 mm (0.0 in) across the entire month, along with lower humidity at 66%. For more specifics on August weather, you can visit Calistoga weather in August.
In comparing the weather of December and September, notable contrasts emerge. December experiences cooler temperatures with a minimum of -1°C (30°F) and an average of 9°C (49°F), while September boasts milder conditions, with a minimum of 7°C (46°F) and an average of 21°C (71°F). Additionally, September sees significantly less precipitation, with only 2 mm (0.1 in) over the month and no rainy days, in stark contrast to December's 95 mm (3.7 in) of precipitation spread across 8 rainy days. Humidity levels also differ, with December at 84% and September at a more comfortable 68%. For a closer look at the weather specifics in September, you can explore Calistoga weather in September.
When comparing the weather in December to October, there's a noticeable shift in temperatures and precipitation patterns. In December, temperatures range from a chilly minimum of -1°C (30°F) to a milder maximum of 23°C (74°F), with an average of 9°C (49°F). Meanwhile, October boasts warmer temperatures, with lows of 4°C (40°F) and highs reaching a scorching 37°C (99°F), averaging 18°C (64°F). Precipitation also differs significantly; December experiences more rain with 95 mm (3.7 in) over 8 days, while October sees only 38 mm (1.5 in) on just 2 days. Additionally, December's humidity level stands at a higher 84%, compared to October's 72%. For more detailed insights, you can check Calistoga weather in October.
In comparing the weather patterns of December and November, December tends to be slightly cooler, with average temperatures ranging from a minimum of -1°C (30°F) to a maximum of 23°C (74°F), compared to November's averages of 0°C (31°F) to 29°C (84°F). Additionally, December sees increased precipitation, with 95 mm (3.7 in) falling over 8 days, while November has only 51 mm (2.0 in) over 5 days. Despite these differences, both months share the same humidity level of 84%, contributing to a relatively damp atmosphere. For more detailed insights, you can check Calistoga weather in November.
As December envelops Calistoga, the weather shifts into a cooler, wetter phase, contrasting sharply with the warm, dry months preceding it. While daytime temperatures can reach a pleasant 23°C (74°F), evenings plunge to a brisk -1°C (30°F), creating a cozy atmosphere perfect for enjoying winter festivities. Rainfall begins to increase, with 95 mm (3.7 in) spread across about 8 days, leading to lush landscapes that refresh the local vineyards. The 84% humidity adds a crispness to the air, making it an invigorating time to experience the region's natural beauty. For more detailed insights into how December fits into the broader Calistoga Climate, feel free to explore further!