Last updated: June 24, 2025
In Armstrong, United States during December, the average temperature hovers around -3°C (26°F), with extremes ranging from a frigid -24°C (-11°F) to a pleasant 19°C (67°F). Rainfall is moderate, with 43 mm (1.7 in) of precipitation spread over about 5 days. You'll also find the average humidity quite high at 83%, creating a chilly yet intriguing atmosphere.
In December in Armstrong, the average temperature is -3°C (26°F), with maximums reaching 19°C (67°F) and minimums dipping as low as -24°C (-11°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.
In Armstrong in December, the precipitation amount is 43 mm (1.7 in) over the course of 5 days.
In Armstrong in December, humidity is 83%. With an average temperature of -3°C (26°F), this humidity feels like a heavy blanket of cold air enveloping you, making it challenging to stay warm while traveling. The dampness seeps into your clothing, creating an uncomfortable chill that lingers even indoors, often requiring extra layers and careful planning for outdoor activities.
In Armstrong 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 Armstrong, you can check the information here.
UV Risk Categories
Weather in Armstrong varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Armstrong, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -8°C (18°F) | 34 mm (1.3 inches) | 82% | moderate |
| February Weather | -8°C (18°F) | 41 mm (1.6 inches) | 84% | moderate |
| March Weather | 1°C (35°F) | 73 mm (2.9 inches) | 80% | moderate |
| April Weather | 7°C (45°F) | 94 mm (3.7 inches) | 81% | very high |
| May Weather | 15°C (60°F) | 148 mm (5.8 inches) | 74% | very high |
| June Weather | 22°C (73°F) | 119 mm (4.7 inches) | 80% | very high |
| July Weather | 24°C (75°F) | 110 mm (4.3 inches) | 80% | very high |
| August Weather | 21°C (71°F) | 113 mm (4.4 inches) | 77% | very high |
| September Weather | 19°C (66°F) | 111 mm (4.4 inches) | 75% | very high |
| October Weather | 9°C (49°F) | 94 mm (3.7 inches) | 80% | moderate |
| November Weather | 2°C (35°F) | 34 mm (1.3 inches) | 87% | moderate |
| December Weather | -3°C (26°F) | 43 mm (1.7 inches) | 83% | moderate |