Historical weather data, all-time temperature records, and monthly climate averages for McLean, VA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5th in McLean sits right in the sweet spot of spring, with 74 years of data pointing to a mild 65° high and a cool 40° low. There's a 35% chance of rain, though snow is essentially off the table at this point. The range of what's possible is wide — this date has seen an 87° scorcher in 2011 and a brutal 18° low back in 1992.
McLean's weather has real range — from a suffocating 105° on August 17, 1997 to a bone-cracking -11° on January 21, 1985, a spread of 116 degrees. A single day in June 1972 dumped 5.92 inches of rain, and a February 2010 snowstorm buried the area under 20 inches in one shot.
Summers are legitimately hot here — the warmest week of the year averages a 90° high, and June through August all push into the mid-to-upper 80s. January is the coolest month, with highs only reaching the mid-40s during the coldest stretch of winter. If you're trying to dodge rain, note that late July is the wettest stretch of the year, averaging over an inch of precipitation in a single week.