Last updated: August 21, 2025
In Hämeenlinna, Finland, December unveils a winter wonderland, showcasing a spectrum of temperatures from a brisk maximum of 5°C (42°F) to a frosty minimum of -20°C (-5°F). The monthly average rests at a chilly -2°C (29°F), setting the scene for a truly wintry experience. Residents and visitors can brace for 63 mm (2.5 in) of precipitation occurring over 14 days, resulting in a humidity level of 95% that can heighten the sense of cold. This blend of brisk temperatures and frequent precipitation characterizes December as a month of both stark beauty and inviting coziness in Hämeenlinna.
In December, Haemeenlinna, Finland, embraces the true essence of winter, with temperatures dipping to a minimum of -20°C (-5°F) and an average chill of -2°C (29°F). This month marks the transition into the coldest part of the year, as the city experiences a stark contrast to the milder autumn months. As the days grow shorter, maximum temperatures reach only 5°C (42°F), reflecting a sharp decline from the late fall averages. December's frigid conditions set the stage for a picturesque winter landscape, sparking the holiday spirit while reminding residents and visitors alike of the unique beauty of Finnish winters.
In December, Haemeenlinna experiences a notable increase in precipitation, with 63 mm (2.5 in) falling over approximately 14 days. This marks a significant rise compared to the earlier winter months, such as January and February, which typically see lower totals of 48 mm (1.9 in) and 41 mm (1.6 in), respectively. As autumn transitions to winter, the frequency of rainy days also peaks in December, highlighting the region's shift to a wetter climate pattern. This uptick in precipitation not only contributes to the snowy landscape but also indicates a cozy, wintry ambiance that characterizes the month, inviting both locals and visitors to embrace the season's charm.
December in Hämeenlinna, Finland, experiences a humidity level of 95%, maintaining a pattern of relatively high moisture typical for the early winter months. As the year transitions from November's 94% humidity, December continues the trend of elevated humidity, characteristic of the colder season. Following the peak humidity in January at 97%, the overall trend in the early months reflects a gradual decline through the spring and summer, where humidity dips noticeably to 75% in both May and June. The consistent moisture levels in December highlight the chilly, damp conditions that can be expected in Hämeenlinna, making it an integral part of the region's winter climate narrative.
In Hämeenlinna, Finland, December ushers in a season of low UV exposure, with the UV Index standing at a gentle 1. This marks the continuation of a trend seen since late autumn, when the index consistently remained low, ensuring a comfortable burn time of 45 minutes for most individuals. As winter settles in, the reduced UV levels offer a reprieve from the higher indices experienced during the sunnier months, especially the peak of summer when values soared to 6. Overall, the transition from autumn to winter reflects a significant drop in UV exposure, making December a safe time for outdoor activities without the worry of sunburn. For more detailed information, visit Haemeenlinna UV Index.
UV Risk Categories
In Hämeenlinna, Finland, December wraps up the year with a mere 41 hours of sunshine, marking it as one of the gloomiest months on the calendar. As winter deepens, sunlight dwindles considerably from the autumn shine, with November only offering 88 hours. This decline contrasts sharply with the vibrant increase in brightness experienced from March onward, where the days stretch longer, culminating in 479 hours of sunlight in June. The stark transition from the sun-drenched days of summer to the dim lights of December serves as a reminder of Finland's dramatic seasonal shifts, creating a unique landscape that embraces both the gentle glow of winter light and the hopeful anticipation of spring's return.
In Hämeenlinna, Finland, the trend of sunny weather throughout the year shows a distinct seasonal variation. As winter sets in, December experiences a notable drop in sunshine, with only an 11% chance of clear skies. This figure is among the lowest, only slightly higher than the desolate beginnings of the year in January. Transitioning from November's 15% chance, December hints at the persistent gloom that typically blankets the region during winter months. As daylight fades and temperatures drop, it becomes clear that while sunny days become increasingly elusive, the anticipation for spring's arrival grows ever stronger.
In Hämeenlinna, Finland, the daylight duration throughout the year paints a vivid picture of the changing seasons. The year kicks off with January’s modest 6 hours of light, gradually brightening to 9 hours in February and peaking at a radiant 19 hours in June. This glimmering peak is just a breath away from July’s 18 hours, as the days begin to wane. By August, daylight slips to 15 hours, followed by a gentle decline into autumn—where 12 hours in September gives way to 9 hours in October and just 7 hours in November. Ultimately, December wraps up the year with a mere 5 hours of daylight, encapsulating the stark contrast of Hämeenlinna's winter months and reminding us of the cyclical nature of light throughout the Finnish year.
As December sweeps into Hämeenlinna, Finland, the wind begins to whisper tales of winter's approach. With an average wind speed of 3.4 m/s (8 mph), this month brings a gentle breeze that lingers in the crisp air, maintaining a consistent pace similar to that of November. Notably, while December's winds reflect a slight increase from the calmer summer months, they remain moderated compared to the gustier onset of autumn. This trend of steady winds throughout the year highlights Hämeenlinna's gentle winter, where the subtle movement of air complements the serene beauty of the snow-dusted landscape, inviting both residents and visitors to embrace the quiet magic of the season.
Weather in Haemeenlinna varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Haemeenlinna, focusing on differences in temperature, rainfall, humidity, and UV levels.
In December, temperatures in Häämeenlinna range from a chilly -20°C (-5°F) at night to a mild 5°C (42°F) during the day, with an average of -2°C (29°F). With 63 mm (2.5 in) of precipitation over 14 days, the month is quite damp and humid, reaching 95% humidity. In contrast, January sees even colder conditions, with nighttime lows dropping to -25°C (-13°F) and daytime highs reaching 8°C (46°F), resulting in an average of -4°C (25°F). Precipitation decreases to 48 mm (1.9 in) over 11 days, but humidity remains high at 97%. For more detailed insights, you can visit Haemeenlinna weather in January.
In December, the weather in Hämeenlinna features a milder temperature range with a minimum of -20°C (-5°F), an average of -2°C (29°F), and a maximum of 5°C (42°F). It experiences relatively high precipitation levels, totaling 63 mm (2.5 in) over 14 days, while humidity remains consistently high at 95%. In contrast, February brings even colder temperatures, with a minimum of -28°C (-18°F) and an average of -5°C (24°F), peaking at 7°C (44°F). Precipitation decreases to 41 mm (1.6 in) over just 9 days, yet the humidity remains unchanged at 95%. For more details on February weather, visit Haemeenlinna weather in February.
In December, temperatures are chilly, with a minimum of -20°C (-5°F), an average of -2°C (29°F), and a maximum of 5°C (42°F). This month also sees considerable precipitation, averaging 63 mm (2.5 in) over 14 rainy days, coupled with high humidity at 95%. In contrast, March presents a notable drop in minimum temperature to -25°C (-13°F), yet it enjoys a slightly warmer maximum of 11°C (52°F) and the same average temperature of -2°C. Precipitation decreases to 43 mm (1.7 in) over 11 days, and humidity remains slightly lower at 93%. For a detailed overview, check out Haemeenlinna weather in March.
December weather is characterized by its frigid temperatures, with averages around -2°C (29°F), and occasional highs reaching just 5°C (42°F). The month is also quite damp, experiencing 63 mm (2.5 in) of precipitation over 14 days, coupled with a high humidity level of 95%. In contrast, April brings a noticeable warming trend, with temperatures ranging from a minimum of -13°C (9°F) to a maximum of 21°C (70°F) and an average of 3°C (38°F). Although April sees less precipitation at 46 mm (1.8 in) over 12 days and lower humidity (86%), the overall climate feels much more inviting compared to the harsh cold of December. For more information on what to expect, check out Haemeenlinna weather in April.
In December, the weather is markedly colder, with temperatures ranging from a chilling minimum of -20°C (-5°F) to a maximum of just 5°C (42°F), resulting in an average of -2°C (29°F). The month is also characterized by high humidity levels at 95% and frequent precipitation, with rain or snow occurring on 14 days, accumulating to 63 mm (2.5 in) of moisture. In contrast, May brings a significant warming trend, with temperatures ranging from a minimum of -4°C (26°F) to a summery maximum of 28°C (82°F), leading to a more pleasant average of 10°C (50°F). Precipitation during May is slightly lower at 60 mm (2.4 in) but occurs over fewer days, just 10 in total, accompanied by a reduced humidity level of 75%. For a detailed look at weather patterns, you can check Haemeenlinna weather in May.
December and June present stark contrasts in weather. In December, temperatures can plunge as low as -20°C (-5°F), with an average around -2°C (29°F) and a maximum reaching only 5°C (42°F). The month is characterized by high humidity at 95% and about 63 mm (2.5 in) of precipitation spread over 14 days. In contrast, June boasts much milder and warmer conditions, with temperatures ranging from a minimum of 2°C (35°F) to a comfortable average of 16°C (61°F) and a maximum that can soar to 31°C (88°F). Although June sees slightly higher precipitation at 71 mm (2.8 in) over just 10 days, the humidity is lower at 75%. For more details, check out Haemeenlinna weather in June.
December and July present starkly contrasting weather conditions. In December, temperatures can plummet to a chilling minimum of -20°C (-5°F), with an average around -2°C (29°F) and a maximum reaching 5°C (42°F). The month is characterized by high humidity at 95% and frequent precipitation on about 14 days, accumulating to 63 mm (2.5 in). In contrast, July brings much warmer weather with minimum temperatures of 6°C (44°F) and averages around 17°C (63°F), peaking at a pleasant 31°C (88°F). While July experiences slightly more precipitation at 85 mm (3.4 in), it does so over fewer days, with rain occurring roughly 11 times, and humidity levels are lower at 80%. For more details on July weather, visit Haemeenlinna weather in July.
December and August in Hämeenlinna showcase drastically different weather patterns. In December, temperatures plummet to a minimum of -20°C (-5°F), with an average of -2°C (29°F) and a maximum of 5°C (42°F). The month is characterized by high humidity at 95% and frequent precipitation, with 63 mm (2.5 in) falling over 14 days. In contrast, August offers a much milder climate, where temperatures can range from a minimum of 5°C (42°F) to a maximum of 30°C (86°F), averaging 16°C (61°F). While it experiences slightly more precipitation at 80 mm (3.2 in) over 13 days, the humidity is lower at 83%. For more insights on weather conditions in August, visit Haemeenlinna weather in August.
In December, temperatures plummet, with lows reaching as low as -20°C (-5°F) and an average of -2°C (29°F), while September enjoys a milder climate with temperatures ranging from -2°C (29°F) to a comfortable maximum of 23°C (74°F). Precipitation levels are fairly similar, with December receiving 63 mm (2.5 in) over 14 days, compared to September's 65 mm (2.6 in) over 13 days. Humidity is more pronounced in December at 95%, whereas September has a slightly lower humidity level of 90%, contributing to the refreshing feel of early autumn. For more insights into September weather, you can explore Haemeenlinna weather in September.
In comparing the weather of December and October, December is characterized by significantly colder temperatures, with a minimum of -20°C (-5°F) and an average of -2°C (29°F), while October offers milder conditions, ranging from a minimum of -6°C (22°F) to a maximum of 18°C (65°F). Furthermore, December's precipitation totals 63 mm (2.5 in) over 14 days, slightly less than October's 75 mm (2.9 in) across 15 days. Humidity is slightly higher in December at 95% compared to October’s 93%. For a more detailed look at October weather patterns, you can check Haemeenlinna weather in October.
In comparing the weather of December to November, December is notably colder, with average temperatures dipping to -2°C (29°F) compared to November's average of 2°C (36°F). The minimum temperatures in December reach a frigid -20°C (-5°F), while November sees milder lows at -11°C (13°F). Precipitation is slightly higher in December, totaling 63 mm (2.5 in) over 14 days, compared to 52 mm (2.1 in) over just 11 days in November. Humidity also remains high in both months, with December at 95% and November at 94%. For more details on November weather, you can check Haemeenlinna weather in November.
As December rolls into Hämeenlinna, the weather transforms significantly when compared to the milder autumn months. With an average temperature of -2°C (29°F) and the potential to dip as low as -20°C (-5°F), it's a stark contrast to the preceding seasons. The high humidity levels, reaching up to 95%, coupled with approximately 14 days of precipitation, make for crisp, chilly days that often feel heavier than the numbers suggest. This colder spell marks the transition into a true winter atmosphere, inviting both residents and visitors to embrace the festive spirit while navigating the picturesque, yet frosty landscape. For a more detailed look at Hämeenlinna's yearly weather patterns, check out the Haemeenlinna Climate.