Last updated: June 24, 2025
In December, the average temperature in Ryland Heights, United States hovers around 4°C (39°F), with extremes ranging from a chilly -15°C (5°F) to a pleasant 20°C (67°F). Expect a total precipitation of 114 mm (4.5 in) over approximately 10 days, accompanied by a high average humidity of 87%. Be prepared for a damp and cool climate!
In December in Ryland Heights, the average temperature is 4°C (39°F), with maximums reaching 20°C (67°F) and minimums dropping as low as -15°C (5°F). Travelers should be prepared for a wide range of temperatures and dress in layers to stay comfortable throughout the day.
In Ryland Heights in December, the precipitation amount is 114 mm (4.5 in) over a period of 10 days.
In Ryland Heights in December, humidity is 87%. With an average temperature of 4°C (39°F), this humidity feels like a damp chill that seeps into your bones, making travel uncomfortable and gritty, as the air hangs heavy and clings to your skin.
In Ryland Heights 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 Ryland Heights, you can check the information here.
UV Risk Categories
Weather in Ryland Heights varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Ryland Heights, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 1°C (34°F) | 81 mm (3.2 inches) | 88% | moderate |
| February Weather | 3°C (38°F) | 112 mm (4.4 inches) | 88% | moderate |
| March Weather | 8°C (46°F) | 136 mm (5.3 inches) | 87% | high |
| April Weather | 12°C (55°F) | 129 mm (5.1 inches) | 85% | very high |
| May Weather | 19°C (66°F) | 132 mm (5.2 inches) | 81% | very high |
| June Weather | 23°C (74°F) | 148 mm (5.8 inches) | 82% | very high |
| July Weather | 25°C (78°F) | 116 mm (4.6 inches) | 81% | very high |
| August Weather | 24°C (75°F) | 93 mm (3.7 inches) | 73% | very high |
| September Weather | 21°C (71°F) | 91 mm (3.6 inches) | 73% | very high |
| October Weather | 15°C (60°F) | 98 mm (3.9 inches) | 78% | high |
| November Weather | 7°C (44°F) | 96 mm (3.8 inches) | 89% | moderate |
| December Weather | 4°C (39°F) | 114 mm (4.5 inches) | 87% | moderate |