Last updated: June 24, 2025
In December, the average temperature in Warsaw, United States hovers around 9°C (49°F), offering a cool yet refreshing atmosphere. Be prepared for a range of temperatures, as it can dip to a chilly -6°C (21°F) at its lowest and rise to a pleasant 25°C (78°F) at its peak. Expect 111 mm (4.4 in) of precipitation over approximately 10 days, contributing to an average humidity of a cozy 86%.
In December in Warsaw, the average temperature is 9°C (49°F), with maximums reaching 25°C (78°F) and minimums dropping as low as -6°C (21°F). Travelers should be prepared for a wide range of temperatures, packing layers to ensure comfort during their visit.
In Warsaw in December, the precipitation amount is 111 mm (4.4 in) over a span of 10 days.
In Warsaw in December, humidity is 86%. With an average temperature of 9°C (49°F), this humidity feels like a damp chill in the air, making travel uncomfortable as the moisture clings to your skin and thickens the atmosphere, creating a sense of heaviness that can tire you quickly.
In Warsaw in December, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Warsaw for better planning.
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 | 7°C (46°F) | 87 mm (3.4 inches) | 85% | moderate |
| February Weather | 10°C (51°F) | 86 mm (3.4 inches) | 82% | high |
| March Weather | 12°C (55°F) | 69 mm (2.7 inches) | 81% | very high |
| April Weather | 17°C (63°F) | 94 mm (3.7 inches) | 80% | very high |
| May Weather | 22°C (72°F) | 123 mm (4.8 inches) | 81% | extreme |
| June Weather | 25°C (77°F) | 159 mm (6.3 inches) | 81% | extreme |
| July Weather | 27°C (80°F) | 139 mm (5.5 inches) | 81% | extreme |
| August Weather | 26°C (79°F) | 178 mm (7.0 inches) | 80% | very high |
| September Weather | 24°C (75°F) | 183 mm (7.2 inches) | 79% | very high |
| October Weather | 19°C (67°F) | 59 mm (2.3 inches) | 80% | very high |
| November Weather | 12°C (54°F) | 83 mm (3.3 inches) | 85% | moderate |
| December Weather | 9°C (49°F) | 111 mm (4.4 inches) | 86% | moderate |