Last updated: June 24, 2025
In December, the average temperature in Smithfield, United States hovers around 1°C (35°F). Expect a chilly minimum of -17°C (2°F) and a warmer maximum of 17°C (64°F). During this month, anticipate about 119 mm (4.7 in) of precipitation spread over 9 days, contributing to an average humidity of 80%. Get ready for a cozy and wet experience!
In December in Smithfield, the average temperature is 1°C (35°F). Maximums can reach 17°C (64°F), while minimums can drop as low as -17°C (2°F). Be sure to bundle up and prepare for a mix of chilly and mild weather if you plan to travel during this time.
In Smithfield in December, the precipitation amount is 119 mm (4.7 in) occurring over a span of 9 days.
In Smithfield in December, humidity is 80%. With an average temperature of 1°C (35°F), this humidity feels like a cold, damp embrace that makes traveling quite uncomfortable, as it seeps into your clothes and makes the air feel heavier, making it hard to stay warm and dry while exploring.
In Smithfield in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Smithfield, you can visit Hourly UV Index in Smithfield.
UV Risk Categories
Weather in Smithfield varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Smithfield, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -1°C (31°F) | 70 mm (2.8 inches) | 84% | moderate |
| February Weather | 1°C (34°F) | 86 mm (3.4 inches) | 84% | moderate |
| March Weather | 4°C (39°F) | 96 mm (3.8 inches) | 82% | high |
| April Weather | 9°C (49°F) | 126 mm (5.0 inches) | 79% | very high |
| May Weather | 15°C (59°F) | 100 mm (3.9 inches) | 75% | very high |
| June Weather | 20°C (69°F) | 95 mm (3.7 inches) | 78% | very high |
| July Weather | 23°C (74°F) | 137 mm (5.4 inches) | 76% | very high |
| August Weather | 23°C (73°F) | 94 mm (3.7 inches) | 76% | very high |
| September Weather | 19°C (66°F) | 90 mm (3.5 inches) | 75% | very high |
| October Weather | 13°C (56°F) | 141 mm (5.6 inches) | 75% | high |
| November Weather | 6°C (43°F) | 97 mm (3.8 inches) | 80% | moderate |
| December Weather | 1°C (35°F) | 119 mm (4.7 inches) | 80% | low |