Historical weather data, all-time temperature records, and monthly climate averages for Rockville, MD. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5 in Rockville tends to feel like spring is finally committing — average highs of 65° with lows around 40°. That said, the date has a wild range: it's hit 87° as recently as 2011 and plunged to 18° back in 1992. There's a 35% chance of rain today, but snow is off the table.
Rockville's weather has real teeth at the extremes — 105° in August 1997 and -11° in January 1985 represent a 116-degree swing over the historical record. A single day in June 1972 dumped nearly 6 inches of rain, and a February 2010 snowstorm buried the area under 20 inches in one shot.
Summer is the main event here, with highs averaging 90° in late July and the wettest stretch of the year arriving right on its heels. If you're avoiding heat and humidity, aim for May (77°) or September (80°) — warm but manageable. Winter is genuinely cold, with January and February highs stuck in the mid-to-upper 40s.