Last updated: June 24, 2025
In December, the average temperature in Warsaw, United States hovers around -4°C (25°F). While you might experience chilling lows of -25°C (-12°F), temperatures can peak at a mild 17°C (63°F). Expect about 46 mm (1.8 in) of precipitation spread over 6 days, coupled with a high average humidity of 84%. Be prepared for a mix of weather!
In December in Warsaw, the average temperature is -4°C (25°F), with maximums reaching 17°C (63°F) and minimums dropping as low as -25°C (-12°F). It's essential to pack for a wide range of temperatures and be prepared for cold weather while traveling during this time.
In Warsaw in December, the precipitation amount is 46 mm (1.8 in) over a span of 6 days.
In Warsaw in December, humidity is 84%. With an average temperature of -4°C (25°F), this humidity feels like a biting chill that seeps into your bones, making outdoor activities uncomfortable and travel less enjoyable.
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 | -9°C (17°F) | 35 mm (1.4 inches) | 87% | moderate |
| February Weather | -9°C (17°F) | 39 mm (1.5 inches) | 90% | moderate |
| March Weather | 1°C (33°F) | 65 mm (2.6 inches) | 85% | moderate |
| April Weather | 6°C (44°F) | 89 mm (3.5 inches) | 84% | very high |
| May Weather | 15°C (59°F) | 136 mm (5.3 inches) | 78% | very high |
| June Weather | 22°C (72°F) | 114 mm (4.5 inches) | 80% | very high |
| July Weather | 23°C (74°F) | 112 mm (4.4 inches) | 81% | very high |
| August Weather | 21°C (71°F) | 136 mm (5.3 inches) | 81% | very high |
| September Weather | 18°C (65°F) | 139 mm (5.5 inches) | 81% | very high |
| October Weather | 9°C (49°F) | 91 mm (3.6 inches) | 84% | moderate |
| November Weather | 1°C (34°F) | 37 mm (1.5 inches) | 88% | moderate |
| December Weather | -4°C (25°F) | 46 mm (1.8 inches) | 84% | low |