Historical weather data, all-time temperature records, and monthly climate averages for Union Market, DC. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in DC lands right in the heart of spring's transition — historically, highs average 65° with lows still dipping to a crisp 41°. There's nearly a coin-flip chance of rain (47%), though snow is essentially off the table. The date has seen wild swings over 75 years of records, from a scorching 85° in 1963 to a brutal 25° low in 1965.
Union Market sits in one of the mid-Atlantic's most weather-extreme cities — DC has logged a punishing 106° (July 2011) and a bone-chilling -10° (January 1982), a 116-degree spread between its all-time records. A single June day in 2006 dropped 7.37 inches of rain, and a January 1966 snowstorm buried the city under 16 inches.
DC runs hot in summer and genuinely cold in winter — the warmest stretch of the year (July 16–22) averages a sweaty 90° high, while mid-January cools to just 43°. Summer is also the wettest season, with July averaging over an inch of rain per week. If you're planning a visit, May (77°) and September (81°) offer the best balance of warmth without peak summer heat and humidity.