Last updated: June 24, 2025
In January, the average temperature in Allen, United States hovers around 8°C (47°F). Temperatures can dip as low as -11°C (12°F), while the mercury may soar to a pleasant 26°C (78°F). Expect about 59 mm (2.3 in) of precipitation spread over 7 days, and prepare for a relatively high average humidity of 80%.
In January in Allen, the average temperature is 8°C (47°F). Maximums can reach 26°C (78°F), and minimums can drop to as low as -11°C (12°F). Be prepared for a wide range of temperatures and pack accordingly for your travels!
In Allen in January, the precipitation amount is 59 mm (2.3 in) over a span of 7 days.
In Allen in January, humidity is 80%. With an average temperature of 8°C (47°F), this humidity feels like you're walking through a heavy mist, making your clothes cling to your skin and every step prone to a shiver, which can be quite uncomfortable for traveling.
In Allen in January, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Allen for better planning.
UV Risk Categories
Weather in Allen varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Allen, focusing on differences in temperature, rainfall, humidity, and UV levels.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | 8°C (47°F) | 59 mm (2.3 inches) | 80% | moderate |
February Weather | 9°C (49°F) | 102 mm (4.0 inches) | 79% | high |
March Weather | 15°C (60°F) | 120 mm (4.7 inches) | 78% | very high |
April Weather | 18°C (65°F) | 121 mm (4.8 inches) | 78% | very high |
May Weather | 23°C (74°F) | 177 mm (7.0 inches) | 81% | extreme |
June Weather | 27°C (81°F) | 86 mm (3.4 inches) | 78% | extreme |
July Weather | 29°C (85°F) | 50 mm (2.0 inches) | 73% | extreme |
August Weather | 29°C (85°F) | 98 mm (3.9 inches) | 66% | extreme |
September Weather | 26°C (79°F) | 92 mm (3.6 inches) | 65% | very high |
October Weather | 20°C (68°F) | 146 mm (5.8 inches) | 72% | very high |
November Weather | 13°C (56°F) | 58 mm (2.3 inches) | 82% | high |
December Weather | 11°C (51°F) | 67 mm (2.6 inches) | 87% | moderate |