Historical weather data, all-time temperature records, and monthly climate averages for Gaithersburg, MD. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in Gaithersburg runs mild but unpredictable — expect a high near 62° and a low around 41°, though history shows anything is possible. On this date in 2011, temperatures hit 82°, while 2013 brought a brutal 22° low. There's nearly a coin-flip chance of rain today, but snow is off the table.
Gaithersburg has seen the full extremes of mid-Atlantic weather, from a sweltering 100° in July 2011 to a brutal -12° in January 1994 — a 112-degree swing over 33 years of records. Hurricane Sandy dropped a jaw-dropping 5.45 inches of rain in a single day in October 2012, and the January 2016 blizzard buried the area under 24 inches of snow.
Summer is the clear peak here, with highs reaching 85-86° in mid-July before tapering off through fall. Winters are cold but not extreme — January highs hover around 37-39° — and the shoulder seasons in April and October offer pleasant mid-60s weather. If you're trying to dodge rain, avoid early September, when weekly precipitation averages a soaking 1.42 inches.