Last updated: June 24, 2025
In December, the average temperature in Warsaw, United States hovers around -1°C (31°F), with potential extremes ranging from a chilly -20°C (-3°F) to a mild 16°C (62°F). During this time, expect 97 mm (3.8 in) of precipitation over approximately 17 days, and embrace the cozy atmosphere with an average humidity of 87%.
In December in Warsaw, the average temperature is -1°C (31°F), with maximums reaching 16°C (62°F) and minimums dropping as low as -20°C (-3°F). It's essential to pack warm clothing and be prepared for a wide range of temperatures while exploring.
In Warsaw in December, the precipitation amount is 97 mm (3.8 in) spread over 17 days.
In Warsaw in December humidity is 87%. With an average temperature of -1°C (31°F), this humidity feels like a biting chill that seeps through your clothes, making traveling incredibly uncomfortable as it adds a layer of dampness to the already cold air, leaving you shivering and wishing for warmth.
In Warsaw in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Warsaw, you can visit Hourly UV Index in Warsaw.
UV Risk Categories
Weather in Warsaw varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Warsaw, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -4°C (25°F) | 83 mm (3.3 inches) | 91% | moderate |
| February Weather | -3°C (28°F) | 89 mm (3.5 inches) | 91% | moderate |
| March Weather | 1°C (34°F) | 81 mm (3.2 inches) | 88% | high |
| April Weather | 7°C (45°F) | 120 mm (4.7 inches) | 88% | very high |
| May Weather | 14°C (57°F) | 118 mm (4.6 inches) | 82% | very high |
| June Weather | 19°C (66°F) | 101 mm (4.0 inches) | 79% | very high |
| July Weather | 21°C (71°F) | 144 mm (5.7 inches) | 77% | very high |
| August Weather | 20°C (69°F) | 104 mm (4.1 inches) | 72% | very high |
| September Weather | 17°C (63°F) | 75 mm (3.0 inches) | 76% | very high |
| October Weather | 11°C (52°F) | 140 mm (5.5 inches) | 83% | high |
| November Weather | 3°C (38°F) | 94 mm (3.7 inches) | 88% | moderate |
| December Weather | -1°C (31°F) | 97 mm (3.8 inches) | 87% | low |