Historical weather data, all-time temperature records, and monthly climate averages for Hazelwood, MO. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5th in Hazelwood sits squarely in spring transition territory — expect something in the low 60s for a high and low 40s overnight, based on 88 years of data. The date has seen wild swings though, from a balmy 91° in 1988 to a bitter 26° back in 1944. Rain is a real possibility at 39%, but snow is nearly off the table at just 2%.
Hazelwood earns its Midwest stripes with some serious extremes — the thermometer has hit 115° in July 1954 and crashed to -18° in January 1985, a swing of 133 degrees. Nearly 8.64 inches of rain fell in a single day in July 2022, and a March 2013 snowstorm dropped 12.4 inches in one shot.
Summer is the main event here, with highs averaging 89-90° in mid-July and the late June through early July stretch being the wettest of the year at over an inch per week. If you're avoiding heat, aim for the shoulder seasons — April and October both average highs in the upper 60s to low 70s. Winter is cold but not brutal, with January highs hovering around 38-39°.