Last updated: June 24, 2025
In December, the average temperature in Rancho Tehama Reserve, United States hovers around 8°C (47°F). Expect a range where the minimum dips to -1°C (30°F) and the maximum can reach up to 22°C (72°F). With an average humidity of 84% and 93 mm (3.7 in) of precipitation over 11 days, it’s wise to prepare for a mix of weather during your stay!
In December in Rancho Tehama Reserve, the average temperature is 8°C (47°F). The maximum can reach 22°C (72°F), while the minimum can drop as low as -1°C (30°F). Be prepared for a varied climate, making it a perfect time for layering your clothing when exploring.
In Rancho Tehama Reserve in December, the precipitation amount is 93 mm (3.7 in) over the course of 11 days, indicating that rain is expected to be fairly frequent during that time.
In Rancho Tehama Reserve in December, humidity is 84%. With an average temperature of 8°C (47°F), this humidity feels like a damp blanket wrapping around you, making travel feel heavy and a bit lethargic, as the air thickens with moisture and each step becomes a little more cumbersome.
In Rancho Tehama Reserve 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 Rancho Tehama Reserve, you can check the information here.
UV Risk Categories
Weather in Rancho Tehama Reserve varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Rancho Tehama Reserve, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 8°C (47°F) | 129 mm (5.1 inches) | 86% | moderate |
| February Weather | 10°C (49°F) | 126 mm (4.9 inches) | 84% | moderate |
| March Weather | 11°C (52°F) | 111 mm (4.4 inches) | 83% | high |
| April Weather | 15°C (60°F) | 54 mm (2.1 inches) | 80% | very high |
| May Weather | 20°C (68°F) | 40 mm (1.6 inches) | 80% | extreme |
| June Weather | 25°C (78°F) | 8 mm (0.3 inches) | 76% | extreme |
| July Weather | 29°C (84°F) | 1 mm (0.0 inches) | 70% | extreme |
| August Weather | 28°C (82°F) | 2 mm (0.1 inches) | 66% | very high |
| September Weather | 24°C (75°F) | 8 mm (0.3 inches) | 68% | very high |
| October Weather | 18°C (64°F) | 37 mm (1.5 inches) | 72% | high |
| November Weather | 12°C (54°F) | 59 mm (2.3 inches) | 84% | moderate |
| December Weather | 8°C (47°F) | 93 mm (3.7 inches) | 84% | moderate |