Last updated: June 24, 2025
In Fountain Inn, United States, the average temperature in December hovers around 8°C (47°F), providing a cool and refreshing atmosphere. Expect temperatures to range from a chilly -7°C (20°F) at night to a pleasant high of 25°C (77°F) during the day. Rainfall is moderate, with an average of 123 mm (4.8 in) spread over 9 days, contributing to the region's lush greenery. Coupled with an average humidity of 87%, this month presents a unique blend of crisp air and gentle moisture—perfect for outdoor adventures or cozy indoor retreats.
In December in Fountain Inn, the average temperature is 8°C (47°F), with maximums reaching up to 25°C (77°F) and minimums dropping as low as -7°C (20°F). Be prepared for a wide range of temperatures during your travels, ensuring you pack accordingly for both warm and chilly conditions.
In Fountain Inn in December, the precipitation amount is 123 mm (4.8 in) over the course of 9 days.
In Fountain Inn in December, humidity is 87%. With an average temperature of 8°C (47°F), this humidity feels like a damp chill that clings to your skin, making outdoor exploration uncomfortably muggy despite the cool air.
In Fountain Inn in December, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Fountain Inn for better planning.
UV Risk Categories
Weather in Fountain Inn varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Fountain Inn, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 7°C (44°F) | 93 mm (3.7 inches) | 86% | moderate |
| February Weather | 10°C (50°F) | 133 mm (5.2 inches) | 85% | high |
| March Weather | 12°C (55°F) | 105 mm (4.1 inches) | 84% | very high |
| April Weather | 17°C (62°F) | 121 mm (4.8 inches) | 82% | very high |
| May Weather | 21°C (71°F) | 137 mm (5.4 inches) | 83% | extreme |
| June Weather | 25°C (77°F) | 89 mm (3.5 inches) | 82% | extreme |
| July Weather | 27°C (80°F) | 102 mm (4.0 inches) | 80% | extreme |
| August Weather | 26°C (79°F) | 128 mm (5.0 inches) | 74% | very high |
| September Weather | 23°C (74°F) | 131 mm (5.2 inches) | 75% | very high |
| October Weather | 18°C (65°F) | 117 mm (4.6 inches) | 79% | very high |
| November Weather | 11°C (51°F) | 95 mm (3.7 inches) | 87% | high |
| December Weather | 8°C (47°F) | 123 mm (4.8 inches) | 87% | moderate |