Last updated: June 24, 2025
In December, the average temperature in John Sam Lake, United States hovers around 5°C (42°F). During this time, you might encounter a minimum of -8°C (18°F), while the maximum can reach up to 12°C (55°F). Expect 247 mm (9.7 in) of precipitation spread over 20 days, contributing to an average humidity of 88%. Be prepared for damp conditions while enjoying the crisp air of early December!
In December, in John Sam Lake, the average temperature is 5°C (42°F). Maximums can reach 12°C (55°F), while minimums can drop as low as -8°C (18°F). Be sure to pack warm clothing if you plan to visit during this time!
In John Sam Lake in December, the precipitation amount is 247 mm (9.7 in) over the course of 20 days.
In John Sam Lake in December humidity is 88%. With an average temperature of 5°C (42°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities less appealing and leading you to seek warmth indoors instead.
In John Sam Lake in December, the maximum UV index is 1, which corresponds to a low Exposure Category. This means you have a time to burn of 45 minutes. For more details, you can check the Hourly UV Index in John Sam Lake.
UV Risk Categories
Weather in John Sam Lake varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in John Sam Lake, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 5°C (42°F) | 219 mm (8.6 inches) | 86% | low |
| February Weather | 4°C (40°F) | 209 mm (8.2 inches) | 86% | moderate |
| March Weather | 7°C (44°F) | 165 mm (6.5 inches) | 87% | moderate |
| April Weather | 9°C (49°F) | 138 mm (5.4 inches) | 84% | high |
| May Weather | 13°C (55°F) | 87 mm (3.4 inches) | 81% | very high |
| June Weather | 15°C (60°F) | 81 mm (3.2 inches) | 82% | very high |
| July Weather | 17°C (64°F) | 31 mm (1.2 inches) | 79% | very high |
| August Weather | 18°C (65°F) | 33 mm (1.3 inches) | 63% | very high |
| September Weather | 15°C (60°F) | 114 mm (4.5 inches) | 62% | high |
| October Weather | 11°C (51°F) | 196 mm (7.7 inches) | 83% | moderate |
| November Weather | 8°C (46°F) | 254 mm (10.0 inches) | 89% | low |
| December Weather | 5°C (42°F) | 247 mm (9.7 inches) | 88% | low |