Last updated: June 24, 2025
In December, the average temperature in Helena-West Helena, United States hovers around 9°C (49°F). Expect a minimum chill of -8°C (19°F) and a warm maximum of 26°C (80°F). Rainfall can add to the atmosphere, with 144 mm (5.7 in) expected over 10 days. Additionally, the humidity remains notably high at 88%, creating a unique, if not slightly damp, experience.
In December in Helena-West Helena, the average temperature is 9°C (49°F). Maximums can reach 26°C (80°F), and minimums can be as low as -8°C (19°F). This diverse temperature range makes Helena-West Helena an interesting destination for travelers who appreciate both mild and chilly weather experiences.
In Helena-West Helena in December, the precipitation amount is 144 mm (5.7 in) over a duration of 10 days.
In Helena-West Helena in December, humidity is 88%. With an average temperature of 9°C (49°F), this humidity feels like a damp chill that seeps into your bones, making traveling uncomfortable and requiring extra layers to stay warm and dry.
In Helena-West Helena 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 Helena-West Helena for better planning.
UV Risk Categories
Weather in Helena-West Helena varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Helena-West Helena, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 7°C (44°F) | 107 mm (4.2 inches) | 84% | moderate |
| February Weather | 9°C (48°F) | 185 mm (7.3 inches) | 83% | high |
| March Weather | 14°C (57°F) | 172 mm (6.8 inches) | 81% | very high |
| April Weather | 17°C (62°F) | 146 mm (5.7 inches) | 81% | very high |
| May Weather | 23°C (73°F) | 138 mm (5.5 inches) | 83% | extreme |
| June Weather | 26°C (79°F) | 133 mm (5.2 inches) | 83% | extreme |
| July Weather | 28°C (82°F) | 124 mm (4.9 inches) | 81% | extreme |
| August Weather | 27°C (81°F) | 114 mm (4.5 inches) | 74% | very high |
| September Weather | 25°C (77°F) | 92 mm (3.6 inches) | 71% | very high |
| October Weather | 19°C (66°F) | 111 mm (4.4 inches) | 76% | high |
| November Weather | 11°C (52°F) | 82 mm (3.2 inches) | 84% | high |
| December Weather | 9°C (49°F) | 144 mm (5.7 inches) | 88% | moderate |