Last updated: June 24, 2025
In Marengo, United States, the average temperature during December hovers around 5°C (41°F). Expect a chilly climate with minimum temperatures dipping to -14°C (7°F) and peaking at a pleasant 22°C (71°F). During this month, you'll encounter approximately 108 mm (4.3 in) of precipitation spread over 10 days, contributing to an average humidity level of 87%. Prepare accordingly for a mix of cool temperatures and damp weather!
In December in Marengo, the average temperature is 5°C (41°F), with maximums reaching 22°C (71°F) and minimums dropping as low as -14°C (7°F). Travelers should be prepared for a wide range of temperatures and should pack accordingly.
In Marengo in December, the total precipitation amount is 108 mm (4.3 in) spread over a duration of 10 days.
In Marengo in December humidity is 87%. With an average temperature of 5°C (41°F), this humidity feels like a heavy, damp blanket enveloping you, making every step seem laborious and the chill more biting, which can be quite challenging for traveling.
In Marengo 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 Marengo, you can check the information here.
UV Risk Categories
Weather in Marengo varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Marengo, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 2°C (35°F) | 89 mm (3.5 inches) | 87% | moderate |
| February Weather | 4°C (39°F) | 127 mm (5.0 inches) | 85% | moderate |
| March Weather | 9°C (48°F) | 136 mm (5.4 inches) | 86% | high |
| April Weather | 13°C (56°F) | 135 mm (5.3 inches) | 84% | very high |
| May Weather | 20°C (67°F) | 139 mm (5.5 inches) | 79% | very high |
| June Weather | 24°C (75°F) | 146 mm (5.8 inches) | 82% | extreme |
| July Weather | 26°C (79°F) | 98 mm (3.9 inches) | 79% | very high |
| August Weather | 25°C (76°F) | 93 mm (3.7 inches) | 70% | very high |
| September Weather | 22°C (72°F) | 104 mm (4.1 inches) | 69% | very high |
| October Weather | 16°C (60°F) | 106 mm (4.2 inches) | 76% | high |
| November Weather | 7°C (45°F) | 94 mm (3.7 inches) | 88% | moderate |
| December Weather | 5°C (41°F) | 108 mm (4.3 inches) | 87% | moderate |