Last updated: June 24, 2025
In December, the average temperature in Murphysboro, United States hovers around 5°C (42°F). Expect a chill as lows can dive to -14°C (7°F), while highs may reach a pleasant 23°C (73°F). With 86 mm (3.4 in) of precipitation over about 8 days, don’t forget your umbrella! The air is fairly humid too, with an average humidity level of 88%.
In December in Murphysboro, the average temperature is 5°C (42°F), with maximums reaching up to 23°C (73°F) and minimums dropping as low as -14°C (7°F). This wide temperature range suggests that travelers should be prepared for both mild and cold conditions during their visit.
In Murphysboro in December, the precipitation amount reaches 86 mm (3.4 in) over the course of 8 days.
In Murphysboro in December humidity is 88%. With an average temperature of 5°C (42°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities less appealing and leading you to seek warmth indoors instead.
In Murphysboro 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 Murphysboro, you can check the information here.
UV Risk Categories
Weather in Murphysboro varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Murphysboro, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 2°C (35°F) | 98 mm (3.9 inches) | 86% | moderate |
| February Weather | 4°C (39°F) | 115 mm (4.5 inches) | 84% | moderate |
| March Weather | 9°C (49°F) | 147 mm (5.8 inches) | 84% | high |
| April Weather | 14°C (57°F) | 145 mm (5.7 inches) | 80% | very high |
| May Weather | 20°C (69°F) | 142 mm (5.6 inches) | 82% | extreme |
| June Weather | 25°C (77°F) | 97 mm (3.8 inches) | 83% | extreme |
| July Weather | 27°C (81°F) | 90 mm (3.5 inches) | 79% | very high |
| August Weather | 25°C (77°F) | 85 mm (3.4 inches) | 76% | very high |
| September Weather | 23°C (73°F) | 75 mm (2.9 inches) | 75% | very high |
| October Weather | 16°C (61°F) | 116 mm (4.5 inches) | 74% | high |
| November Weather | 8°C (46°F) | 91 mm (3.6 inches) | 85% | moderate |
| December Weather | 5°C (42°F) | 86 mm (3.4 inches) | 88% | moderate |