Historical weather data, all-time temperature records, and monthly climate averages for Fort Washington, MD. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5th in Fort Washington runs mild but variable — expect a high near 61° and a low around 37°, though history shows the date can swing wildly, from a brutal 25° in 1965 to a shirt-sleeve 80° just this year in 2025. There's a 1-in-3 chance of rain, so keep an umbrella handy, but snow is essentially off the table.
Fort Washington has seen some serious weather extremes over its 69 years of records — from a scorching 100° in June 1969 to a bone-chilling -10° in January 1961, a 110-degree swing. On the wet side, a single day in September 1966 dumped 4.57 inches of rain, and that same year January dropped 18.7 inches of snow in one storm.
Summer is the main event here, with late June through early July averaging highs of 86-87° — prime time for outdoor plans, though late August brings the wettest stretch of the year at over 1.6 inches per week. If you're heat-averse, aim for spring or fall, when highs sit in the comfortable 53-68° range; January and February are the coolest months, with average highs barely cracking 40-44°.