Allen weather by month
Average highs run from 56°F in January to 95°F in July, and January nights average 34°F. It gets 38 inches of rain and melted snow a year, with almost no snow. Expect about 97 days a year at 90°F or hotter. The most comfortable months are March to April and October to November.
Best time to visit Allen
For comfortable weather, go in March to April and October to November. In those months the average high stays between 62°F and 86°F, nights average 42°F or warmer, and rain stays under 4.5 inches for the month.
Month by month
| Month | High | Low | Precip. | Snow | Wet days | Days 90°F+ | Nights below 32°F | Feels |
|---|---|---|---|---|---|---|---|---|
| January | 56°F | 34°F | 2.7 in | 0.0 in | 4 | 0 | 16 | cool |
| February | 60°F | 38°F | 2.6 in | 0.0 in | 4 | 0 | 10 | cool |
| March | 68°F | 46°F | 3.5 in | 0.0 in | 5 | 0 | 3 | mild |
| April | 75°F | 53°F | 3.6 in | 0.0 in | 5 | 0 | 0 | mild |
| May | 83°F | 62°F | 4.8 in | 0.0 in | 6 | 5 | 0 | warm |
| June | 91°F | 70°F | 3.6 in | 0.0 in | 5 | 20 | 0 | hot |
| July | 95°F | 74°F | 2.0 in | 0.0 in | 3 | 27 | 0 | very hot |
| August | 96°F | 73°F | 1.7 in | 0.0 in | 3 | 27 | 0 | very hot |
| September | 88°F | 66°F | 2.8 in | 0.0 in | 4 | 15 | 0 | hot |
| October | 78°F | 54°F | 4.4 in | 0.0 in | 5 | 3 | 0 | warm |
| November | 66°F | 44°F | 3.2 in | 0.0 in | 4 | 0 | 4 | mild |
| December | 57°F | 36°F | 3.5 in | 0.2 in | 4 | 0 | 14 | cool |
| Year | 76°F avg | 54°F avg | 38.3 in | 0.2 in | 54 | 97 | 48 |
"Wet days" are days with at least 0.1 inch of precipitation. "Feels" is a plain-language label for the average high. Normals for 1991-2020 from NOAA NCEI, station Mckinney Municipal Airport, TX (USW00053914), 5.3 miles from the city center; snowfall from Lavon Dam, TX. Averages describe typical conditions, not a forecast.
Sunrise, sunset and daylight in Allen
The shortest day is December 21, with 9h 57m of daylight; the longest is June 21, with 14h 20m. The earliest sunset comes around November 26 (5:19 pm) and the latest around June 24 (8:39 pm). The sun sets after 8 pm on 128 days a year.
| On the 15th of | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 7:30 am | 5:42 pm | 10h 12m |
| February | 7:10 am | 6:11 pm | 11h 01m |
| March | 7:36 am | 7:34 pm | 11h 57m |
| April | 6:56 am | 7:56 pm | 13h 00m |
| May | 6:27 am | 8:19 pm | 13h 52m |
| June | 6:17 am | 8:36 pm | 14h 19m |
| July | 6:28 am | 8:36 pm | 14h 07m |
| August | 6:49 am | 8:11 pm | 13h 22m |
| September | 7:10 am | 7:32 pm | 12h 22m |
| October | 7:31 am | 6:52 pm | 11h 22m |
| November | 6:57 am | 5:24 pm | 10h 27m |
| December | 7:22 am | 5:20 pm | 9h 58m |
Calculated for 2026 at the center of Allen with NOAA's solar equations, in local clock time (Central Time, including daylight saving time where it applies). Times shift by a minute or two from year to year.
Is Allen getting warmer?
The last 10 years averaged 2.3°F warmer than the 20th century. See the climate stripes for Allen.Frequently asked questions
What is the warmest month in Allen?
August is the warmest month, with an average high of 96°F and an average low of 73°F (NOAA 1991-2020 normals).
What is the coldest month in Allen?
January is the coldest, with average lows of 34°F and highs of 56°F.
What is the rainiest month in Allen?
May gets the most precipitation, 4.8 inches on average. August is the driest at 1.7 inches.
Does it snow in Allen?
Very little. The normal yearly snowfall is under one inch.
When is the best time to visit Allen?
For comfortable weather, March to April and October to November. Those months average highs between 62 and 86°F with lows of 42°F or more and modest rain.
Thinking of moving to Allen?
See what homes, rent and everyday prices cost, who lives there and how it compares with nearby cities on the full Allen profile.
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