Allen Weather & Climate: Best Time to Visit

Depending on the time of the year, temperatures range from very warm to moderate in Allen. On average, daytime temperatures range from a very warm 33°C (91°F) in January to a moderate 13°C (55°F) in July.

Nighttime temperatures range from 17°C (63°F) in January to 2°C (36°F) in July.

Check out our detailed temperature page for more information.

Temperature ranges by month

Allen has a relatively dry climate with low precipitation, averaging 260 mm (10 in) of rain/snowfall annually. The seasons in Allen bring significant changes in precipitation. The wettest month, October, receives moderate rainfall, with an average of 33 mm (1.3 in) of precipitation. This rainfall is distributed across 4 rainy days.

In contrast, the driest month, August, experiences much less rainfall, totaling 14 mm (0.6 in) over 3 rainy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our Allen Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

In Allen, summer days are longer and more sunny, with daily sunshine hours peaking at 10.5 hours in January. As the darker season arrives, the brightness of the sun becomes less. June sees a soft sun for only 4.0 hours per average day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

Daily percentage of sunshine

The relative humidity is moderate throughout the year in Allen.

The city experiences its highest humidity in June, reaching 69%. In January, the humidity drops to its lowest level at 37%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year