Historical weather data, all-time temperature records, and monthly climate averages for Watertown, NY. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5th in Watertown lands right in that awkward shoulder season — expect a high around 48° and a low of 30°, with nearly a coin-flip chance of precipitation. The date has seen wilder swings than you might expect: a scorching 82° back in 1910, and a brutal 4° low in 1898. There's still a 10% shot at snow, so don't put the winter coat away just yet.
Watertown's weather has an extreme streak — from a 99° scorcher in July 1894 to a bone-chilling -39° in December 1933, a swing of 138 degrees across the record books. The city is also no stranger to legendary lake-effect events: a staggering 45 inches of snow fell in a single November day in 1900, a number that's hard to wrap your head around even by North Country standards.
If you're planning a visit, July 16–22 is your sweet spot, with average highs peaking around 81° — while late January through early February bottoms out at a frigid 27°. Late November into December is the wettest stretch of the year, averaging over an inch of precipitation per week, often falling as snow. Spring and fall are brief transitions; Watertown doesn't linger long between winter and summer.