Last updated: June 24, 2025
In Iowa Falls, United States, the average temperature in December hovers around -2°C (29°F). While you may experience chilly minimums of -23°C (-8°F), there's also the potential for a surprising high of 22°C (71°F). Over the month, expect about 35 mm (1.4 in) of precipitation spread across 5 days, with humidity averaging a brisk 83%. Prepare for quite the weather rollercoaster!
In December in Iowa Falls, the average temperature is -2°C (29°F), with maximums reaching 22°C (71°F) and minimums dropping as low as -23°C (-8°F). This wide temperature range makes it essential for travelers to pack accordingly, ensuring they are prepared for both chilly conditions and potential warmer days.
In Iowa Falls in December, the precipitation amount is 35 mm (1.4 in) over a span of 5 days.
In Iowa Falls in December, humidity is 83%. With an average temperature of -2°C (29°F), this humidity feels like a biting chill that seeps into your bones, making travel outside feel particularly uncomfortable and brisk, as the damp air enhances the cold sensation, leaving you longing for warmth and shelter.
In Iowa Falls 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 Iowa Falls, you can check the information here.
UV Risk Categories
Weather in Iowa Falls varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Iowa Falls, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -7°C (20°F) | 37 mm (1.4 inches) | 82% | moderate |
| February Weather | -7°C (20°F) | 47 mm (1.8 inches) | 84% | moderate |
| March Weather | 3°C (37°F) | 71 mm (2.8 inches) | 80% | high |
| April Weather | 8°C (47°F) | 80 mm (3.1 inches) | 81% | very high |
| May Weather | 16°C (61°F) | 158 mm (6.2 inches) | 74% | very high |
| June Weather | 23°C (73°F) | 117 mm (4.6 inches) | 80% | extreme |
| July Weather | 24°C (75°F) | 99 mm (3.9 inches) | 80% | very high |
| August Weather | 22°C (72°F) | 91 mm (3.6 inches) | 77% | very high |
| September Weather | 19°C (67°F) | 119 mm (4.7 inches) | 75% | very high |
| October Weather | 10°C (51°F) | 125 mm (4.9 inches) | 80% | high |
| November Weather | 2°C (36°F) | 45 mm (1.8 inches) | 87% | moderate |
| December Weather | -2°C (29°F) | 35 mm (1.4 inches) | 83% | moderate |