Last updated: June 24, 2025
In Ankeny, United States, the average temperature in December hovers around -1°C (31°F), but be prepared for extremes—minimums can plunge to -23°C (-8°F), while highs may reach 22°C (73°F). Expect approximately 37 mm (1.4 in) of precipitation spread over 5 days, and brace yourself for an average humidity level of 83%, making it a brisk and damp month overall!
In December in Ankeny, the average temperature is -1°C (31°F), with maximums reaching up to 22°C (73°F) and minimums dropping as low as -23°C (-8°F). Be prepared for a wide range of temperatures while traveling during this time.
In Ankeny in December, the precipitation amount is 37 mm (1.4 in) spread over a duration of 5 days.
In Ankeny 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 Ankeny 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 Ankeny, you can check the information here.
UV Risk Categories
Weather in Ankeny varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Ankeny, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -6°C (22°F) | 38 mm (1.5 inches) | 78% | moderate |
| February Weather | -5°C (23°F) | 42 mm (1.6 inches) | 80% | moderate |
| March Weather | 4°C (39°F) | 81 mm (3.2 inches) | 77% | high |
| April Weather | 9°C (49°F) | 77 mm (3.0 inches) | 77% | very high |
| May Weather | 17°C (62°F) | 168 mm (6.6 inches) | 77% | very high |
| June Weather | 23°C (74°F) | 112 mm (4.4 inches) | 81% | extreme |
| July Weather | 25°C (77°F) | 74 mm (2.9 inches) | 81% | very high |
| August Weather | 23°C (74°F) | 83 mm (3.3 inches) | 77% | very high |
| September Weather | 20°C (68°F) | 122 mm (4.8 inches) | 73% | very high |
| October Weather | 11°C (53°F) | 133 mm (5.2 inches) | 75% | high |
| November Weather | 3°C (38°F) | 41 mm (1.6 inches) | 85% | moderate |
| December Weather | -1°C (31°F) | 37 mm (1.4 inches) | 83% | moderate |