Last updated: June 24, 2025
In December, the average temperature in Grimes, United States hovers around -1°C (31°F). You'll want to prepare for a wide range of temperatures, with a minimum dipping to -23°C (-9°F) and a maximum soaring up to 22°C (73°F). Expect some drizzle as well, with an average precipitation of 37 mm (1.5 in) spread over 5 days. Don't forget to account for the high humidity, averaging at 83%!
In December in Grimes, the average temperature is -1°C (31°F). Maximum temperatures can reach 22°C (73°F), while minimum temperatures can plummet to as low as -23°C (-9°F). Be prepared for a wide temperature range if you're planning to travel during this month!
In Grimes in December, the precipitation amount is 37 mm (1.5 in) spread over a period of 5 days.
In Grimes in December humidity is 83%. With an average temperature of -1°C (31°F), this humidity feels like a heavy, icy blanket enveloping you, making each step outside feel like a struggle against the cold, damp air that clings to your skin, often leaving you wishing for warmth and refuge indoors.
In Grimes in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Grimes, you can check the information here.
UV Risk Categories
Weather in Grimes varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Grimes, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -6°C (22°F) | 37 mm (1.4 inches) | 78% | moderate |
| February Weather | -5°C (23°F) | 40 mm (1.6 inches) | 80% | moderate |
| March Weather | 4°C (40°F) | 81 mm (3.2 inches) | 77% | high |
| April Weather | 9°C (49°F) | 75 mm (2.9 inches) | 77% | very high |
| May Weather | 17°C (62°F) | 169 mm (6.7 inches) | 77% | very high |
| June Weather | 23°C (74°F) | 109 mm (4.3 inches) | 81% | extreme |
| July Weather | 25°C (77°F) | 76 mm (3.0 inches) | 81% | very high |
| August Weather | 23°C (74°F) | 87 mm (3.4 inches) | 77% | very high |
| September Weather | 20°C (69°F) | 120 mm (4.7 inches) | 73% | very high |
| October Weather | 11°C (53°F) | 128 mm (5.0 inches) | 75% | high |
| November Weather | 3°C (39°F) | 39 mm (1.5 inches) | 85% | moderate |
| December Weather | -1°C (31°F) | 37 mm (1.5 inches) | 83% | moderate |