Last updated: June 24, 2025
In La Grange, United States, the average temperature in December hovers around 9°C (49°F). While you may experience chilly nights with minimums dipping to -7°C (19°F), the days can warm up to a pleasant 25°C (78°F). Be prepared for some rain as you can expect about 107 mm (4.2 in) of precipitation over 10 days. Don't forget your umbrella, as the average humidity is quite high at 86%!
In December in La Grange, the average temperature is 9°C (49°F), with maximums reaching 25°C (78°F) and minimums dropping as low as -7°C (19°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.
In La Grange in December, the precipitation amount is 107 mm (4.2 in) accumulated over a period of 10 days.
In La Grange 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 La Grange 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 La Grange for better planning.
UV Risk Categories
Weather in La Grange varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in La Grange, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 7°C (45°F) | 88 mm (3.5 inches) | 85% | moderate |
| February Weather | 10°C (51°F) | 85 mm (3.3 inches) | 82% | high |
| March Weather | 12°C (54°F) | 72 mm (2.8 inches) | 81% | very high |
| April Weather | 17°C (63°F) | 104 mm (4.1 inches) | 80% | very high |
| May Weather | 22°C (71°F) | 115 mm (4.5 inches) | 81% | extreme |
| June Weather | 25°C (77°F) | 139 mm (5.5 inches) | 81% | extreme |
| July Weather | 27°C (81°F) | 127 mm (5.0 inches) | 81% | extreme |
| August Weather | 26°C (79°F) | 159 mm (6.3 inches) | 80% | very high |
| September Weather | 24°C (75°F) | 148 mm (5.8 inches) | 79% | very high |
| October Weather | 19°C (67°F) | 65 mm (2.5 inches) | 80% | very high |
| November Weather | 12°C (53°F) | 88 mm (3.5 inches) | 85% | moderate |
| December Weather | 9°C (49°F) | 107 mm (4.2 inches) | 86% | moderate |