Last updated: June 24, 2025
In December, the average temperature in Warsaw, United States hovers around 2°C (37°F). Expect chilly lows of -15°C (5°F) and occasional highs reaching up to 18°C (65°F). With 98 mm (3.9 in) of precipitation spread over 11 days, it's a wet month, complemented by a high average humidity of 86%.
In December in Warsaw, the average temperature is 2°C (37°F), with maximums reaching 18°C (65°F) and minimums dipping as low as -15°C (5°F). This wide range of temperatures suggests that travelers should be prepared for both mild days and cold nights while visiting.
In Warsaw in December, the total precipitation amount is 98 mm (3.9 in) over the course of 11 days.
In Warsaw in December, humidity is 86%. With an average temperature of 2°C (37°F), this humidity feels like a chilly dampness that clings to your clothes and makes outdoor activities quite uncomfortable for traveling.
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 | -1°C (31°F) | 87 mm (3.4 inches) | 88% | moderate |
| February Weather | 1°C (35°F) | 108 mm (4.2 inches) | 88% | moderate |
| March Weather | 6°C (42°F) | 108 mm (4.3 inches) | 87% | high |
| April Weather | 11°C (52°F) | 129 mm (5.1 inches) | 87% | very high |
| May Weather | 17°C (63°F) | 126 mm (4.9 inches) | 81% | very high |
| June Weather | 22°C (71°F) | 136 mm (5.4 inches) | 83% | very high |
| July Weather | 24°C (76°F) | 116 mm (4.6 inches) | 82% | very high |
| August Weather | 23°C (73°F) | 87 mm (3.4 inches) | 76% | very high |
| September Weather | 20°C (69°F) | 103 mm (4.0 inches) | 77% | very high |
| October Weather | 14°C (58°F) | 105 mm (4.1 inches) | 82% | high |
| November Weather | 6°C (42°F) | 97 mm (3.8 inches) | 89% | moderate |
| December Weather | 2°C (37°F) | 98 mm (3.9 inches) | 86% | low |