Last updated: June 24, 2025
In December, the average temperature in Keller, United States is a crisp 11°C (51°F). Be prepared for a wide temperature range, with minimums dipping to -6°C (22°F) and maximums soaring up to 29°C (84°F). Expect about 52 mm (2.0 in) of precipitation spread over 7 days, accompanied by an average humidity of 87%, creating a refreshing atmosphere.
In December in Keller, the average temperature is 11°C (51°F). The maximum can reach 29°C (84°F), and the minimum can be as low as -6°C (22°F). Be prepared for a wide range of temperatures, making it essential to pack layers for your trip.
In Keller in December, the precipitation amount is 52 mm (2.0 in) over a duration of 7 days.
In Keller in December humidity is 87%. With an average temperature of 11°C (51°F), this humidity feels like a damp chill wrapping around you, making outdoor excursions a bit uncomfortable as the air feels thick and heavy, urging you to seek shelter more often than not.
In Keller in December, 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 Keller for better planning.
UV Risk Categories
Weather in Keller varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Keller, focusing on differences in temperature, rainfall, humidity, and UV levels.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | 8°C (46°F) | 52 mm (2.0 inches) | 80% | moderate |
February Weather | 9°C (49°F) | 89 mm (3.5 inches) | 79% | high |
March Weather | 16°C (60°F) | 100 mm (3.9 inches) | 78% | very high |
April Weather | 18°C (65°F) | 104 mm (4.1 inches) | 78% | very high |
May Weather | 24°C (75°F) | 150 mm (5.9 inches) | 81% | extreme |
June Weather | 27°C (82°F) | 88 mm (3.5 inches) | 78% | extreme |
July Weather | 30°C (85°F) | 40 mm (1.6 inches) | 73% | extreme |
August Weather | 29°C (85°F) | 87 mm (3.4 inches) | 66% | extreme |
September Weather | 26°C (79°F) | 79 mm (3.1 inches) | 65% | very high |
October Weather | 20°C (68°F) | 133 mm (5.2 inches) | 72% | very high |
November Weather | 13°C (56°F) | 54 mm (2.1 inches) | 82% | high |
December Weather | 11°C (51°F) | 52 mm (2.0 inches) | 87% | moderate |