Historical weather data, all-time temperature records, and monthly climate averages for Allen, TX. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5th in Allen lands right in the sweet spot of spring, with average highs of 74° and lows around 48°. The date has seen some wild swings over 96 years of records — a sweltering 98° back in 1927 and a teeth-chattering 25° low in 1920. There's about a 1-in-4 chance of rain today, so keep an umbrella handy.
Allen's weather has a flair for the dramatic — the thermometer has swung from a brutal -7° in January 1930 all the way up to 118° in August 1936, a range of 125 degrees. On the wet side, a single day in September 1964 dumped 12.1 inches of rain, and that same year delivered the snowiest day on record with 7 inches in January.
Summers here are long and serious — highs average 96° through July and August, with the hottest stretch peaking the week of August 6th. If you're looking for relief, January is your best bet, with highs only reaching the mid-50s. Spring is the wettest season, with late April averaging the most precipitation of any week at 1.43 inches.