Historical weather data, all-time temperature records, and monthly climate averages for Catonsville, MD. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5 in Catonsville typically lands in that sweet spot of early spring — average highs of 61° and lows of 40°, with a 28% chance of rain but essentially no snow risk. The date has seen wild swings over 86 years of records, from a balmy 84° in 2010 to a teeth-chattering 26° back in 1964.
Catonsville has earned its Mid-Atlantic stripes the hard way — a punishing 106° in July 2011 on one end, and a brutal -7° in January 1963 on the other. Summer storms can be ferocious too; a single day in August 2014 dropped 6.3 inches of rain, and a January 2016 snowstorm buried the area under 25.5 inches.
Summers here are legitimately hot, with average highs peaking around 89° in late July and the mercury staying in the mid-to-upper 80s through August. If you're cold-averse, avoid mid-January, when highs average just 41°. The wettest stretch falls around late May into early June, so pack accordingly for late spring trips.