Last updated: June 24, 2025
In Crystal Lake, United States, the average temperature in January hovers around -1°C (30°F), with extremes ranging from a chilly -24°C (-10°F) to a pleasant 19°C (67°F). Expect about 69 mm (2.7 in) of precipitation over 8 days, contributing to an average humidity of 84%, making this month a mix of cold and wet weather.
In January in Crystal Lake, the average temperature is -1°C (30°F), with a maximum that can reach 19°C (67°F) and a minimum that can drop as low as -24°C (-10°F). Travelers should be prepared for a wide range of temperatures, from chilly to surprisingly warm, making it essential to pack layers and stay versatile in their clothing choices.
In Crystal Lake in January, the precipitation amount is 69 mm (2.7 in) that falls over a period of 8 days.
In Crystal Lake in January, humidity is 84%. With an average temperature of -1°C (30°F), this humidity feels like a sharp chill that seeps into your bones, making travel uncomfortable as the wetness in the air intensifies the cold, leaving you yearning for warmth and shelter.
In Crystal Lake in January, 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 Crystal Lake, you can check the information here.
UV Risk Categories
Weather in Crystal Lake varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Crystal Lake, focusing on differences in temperature, rainfall, humidity, and UV levels.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | -1°C (30°F) | 69 mm (2.7 inches) | 84% | moderate |
February Weather | 0°C (32°F) | 88 mm (3.5 inches) | 82% | moderate |
March Weather | 3°C (38°F) | 85 mm (3.4 inches) | 81% | high |
April Weather | 9°C (49°F) | 128 mm (5.0 inches) | 78% | very high |
May Weather | 15°C (59°F) | 110 mm (4.3 inches) | 69% | very high |
June Weather | 20°C (69°F) | 79 mm (3.1 inches) | 69% | very high |
July Weather | 23°C (74°F) | 141 mm (5.6 inches) | 62% | very high |
August Weather | 23°C (73°F) | 86 mm (3.4 inches) | 65% | very high |
September Weather | 19°C (66°F) | 101 mm (4.0 inches) | 68% | very high |
October Weather | 13°C (56°F) | 138 mm (5.4 inches) | 74% | high |
November Weather | 5°C (42°F) | 92 mm (3.6 inches) | 82% | moderate |
December Weather | 1°C (34°F) | 121 mm (4.8 inches) | 80% | low |