Historical weather data, all-time temperature records, and monthly climate averages for Greater Upper Marlboro, MD. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in Upper Marlboro sits right in the swing of spring — expect a high around 60° and a low near 42°, with a 30% chance of rain. The date has a wild range in the books: a toasty 85° back in 1956, and a bitter 27° low in 1954. No snow risk today, though.
Upper Marlboro has seen some serious extremes over its 77-year record. The mercury once hit 102° on July 31, 1954, and plunged to -3° on January 9, 1970 — a 105-degree spread that captures just how much this mid-Atlantic location can swing. August 12, 1955 brought the wettest single day on record at 6.4 inches, while February 15, 1958 buried the area under 13.6 inches of snow.
Upper Marlboro peaks in late June through early July, with average highs reaching 87° the week of June 25. If you're cold-averse, avoid January 8–14, when highs average just 41°. Late August is the wettest stretch of the year, so plan outdoor events accordingly.