Last updated: June 24, 2025
In December, the average temperature in Mountain Grove, United States hovers around 5°C (41°F). Expect a chilly minimum of -13°C (8°F), while temperatures can soar to a comfortable 25°C (77°F) on warmer days. Be prepared for some rain, as 65 mm (2.5 in) of precipitation is likely over 7 days. Moreover, with an average humidity of 86%, it’s advisable to dress in layers to stay cozy!
In December in Mountain Grove, the average temperature is 5°C (41°F), with maximums reaching 25°C (77°F) and minimums dropping as low as -13°C (8°F). Be prepared for a wide range of temperatures when planning your trip.
In Mountain Grove in December, the precipitation amount is 65 mm (2.5 in) over a span of 7 days.
In Mountain Grove in December humidity is 86%. With an average temperature of 5°C (41°F), this humidity feels like a heavy, damp blanket wrapping around you, making outdoor activities uncomfortable and travel quite challenging due to the chill combined with the stickiness in the air.
In Mountain Grove 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 Mountain Grove, you can check the information here.
UV Risk Categories
Weather in Mountain Grove varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Mountain Grove, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 1°C (35°F) | 74 mm (2.9 inches) | 83% | moderate |
| February Weather | 3°C (37°F) | 96 mm (3.8 inches) | 81% | high |
| March Weather | 9°C (48°F) | 141 mm (5.6 inches) | 80% | high |
| April Weather | 12°C (55°F) | 177 mm (7.0 inches) | 80% | very high |
| May Weather | 18°C (65°F) | 183 mm (7.2 inches) | 83% | very high |
| June Weather | 23°C (74°F) | 81 mm (3.2 inches) | 83% | extreme |
| July Weather | 26°C (78°F) | 82 mm (3.2 inches) | 76% | extreme |
| August Weather | 24°C (76°F) | 100 mm (3.9 inches) | 69% | very high |
| September Weather | 22°C (72°F) | 48 mm (1.9 inches) | 68% | very high |
| October Weather | 14°C (58°F) | 124 mm (4.9 inches) | 72% | high |
| November Weather | 7°C (45°F) | 68 mm (2.7 inches) | 83% | moderate |
| December Weather | 5°C (41°F) | 65 mm (2.5 inches) | 86% | moderate |