Last updated: June 24, 2025
In Johnstonville, United States, the average temperature in December hovers around -1°C (31°F), with extremes ranging from a chilly -13°C (9°F) to a mild 13°C (55°F). Visitors can expect 63 mm (2.5 in) of precipitation spread over 9 days, while the air carries an average humidity of 86%. Bundle up and be prepared for those damp, cool days!
In December in Johnstonville, the average temperature is -1°C (31°F). Maximum temperatures can reach 13°C (55°F), while the minimum can drop as low as -13°C (9°F). Be sure to pack warm layers and prepare for a mix of temperatures during your travels.
In Johnstonville in December, the total precipitation amount is 63 mm (2.5 in) spread over a duration of 9 days.
In Johnstonville in December humidity is 86%. With an average temperature of -1°C (31°F), this humidity feels like an eerie chill enveloping you, making travel uncomfortable as the damp air bites into your skin and the cold seeps through even the warmest of clothes, creating an atmosphere that is heavy and uninviting.
In Johnstonville 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 Johnstonville, you can check the information here.
UV Risk Categories
Weather in Johnstonville varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Johnstonville, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 0°C (32°F) | 88 mm (3.5 inches) | 86% | moderate |
| February Weather | 0°C (33°F) | 93 mm (3.7 inches) | 87% | moderate |
| March Weather | 3°C (38°F) | 75 mm (3.0 inches) | 86% | very high |
| April Weather | 8°C (47°F) | 38 mm (1.5 inches) | 83% | very high |
| May Weather | 13°C (56°F) | 40 mm (1.6 inches) | 72% | extreme |
| June Weather | 19°C (67°F) | 10 mm (0.4 inches) | 67% | extreme |
| July Weather | 24°C (75°F) | 7 mm (0.3 inches) | 56% | extreme |
| August Weather | 23°C (73°F) | 7 mm (0.3 inches) | 42% | extreme |
| September Weather | 18°C (64°F) | 16 mm (0.6 inches) | 46% | very high |
| October Weather | 10°C (51°F) | 32 mm (1.2 inches) | 67% | high |
| November Weather | 5°C (41°F) | 39 mm (1.5 inches) | 86% | moderate |
| December Weather | -1°C (31°F) | 63 mm (2.5 inches) | 86% | moderate |