Last updated: June 24, 2025
In December, the average temperature in West Lafayette, United States hovers around 2°C (35°F). Expect a wide range of temperatures, with a minimum of -24°C (-11°F) and a maximum reaching 18°C (64°F). You'll also experience an average precipitation of 62 mm (2.4 in), spread across about 9 days. The air will feel quite humid, with an average humidity level of 86%.
In December in West Lafayette, the average temperature is 2°C (35°F), with maximums reaching 18°C (64°F) and minimums dropping as low as -24°C (-11°F). Be prepared for a wide range of temperatures, so pack accordingly for your trip!
In West Lafayette in December, the precipitation amount is 62 mm (2.4 in) over the course of 9 days.
In West Lafayette in December humidity is 86%. With an average temperature of 2°C (35°F), this humidity feels like a damp chill that seeps into your bones, making traveling quite uncomfortable as your clothes cling to you and the cold air cuts through any warmth you try to find.
In West Lafayette 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 West Lafayette, you can visit Hourly UV Index in West Lafayette.
UV Risk Categories
Weather in West Lafayette varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in West Lafayette, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -2°C (29°F) | 74 mm (2.9 inches) | 85% | moderate |
| February Weather | -1°C (31°F) | 77 mm (3.0 inches) | 85% | moderate |
| March Weather | 5°C (42°F) | 106 mm (4.2 inches) | 86% | high |
| April Weather | 11°C (52°F) | 97 mm (3.8 inches) | 87% | very high |
| May Weather | 18°C (64°F) | 152 mm (6.0 inches) | 81% | very high |
| June Weather | 23°C (74°F) | 100 mm (3.9 inches) | 82% | extreme |
| July Weather | 25°C (77°F) | 99 mm (3.9 inches) | 81% | very high |
| August Weather | 23°C (74°F) | 101 mm (4.0 inches) | 79% | very high |
| September Weather | 21°C (70°F) | 65 mm (2.6 inches) | 78% | very high |
| October Weather | 14°C (57°F) | 112 mm (4.4 inches) | 81% | high |
| November Weather | 5°C (41°F) | 75 mm (3.0 inches) | 89% | moderate |
| December Weather | 2°C (35°F) | 62 mm (2.4 inches) | 86% | low |