Historical weather data, all-time temperature records, and monthly climate averages for Londonderry, NH. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in Londonderry sits squarely in the 'anything goes' zone of early spring — average highs of 50° with lows still dipping to 34°. The date has seen a 62-degree swing in extremes, from a balmy 75° in 2010 to a brutal 13° back in 1954. There's still a 7% chance of snow today, so don't put those boots away just yet.
Londonderry earns its New England stripes with a 123-degree spread between its all-time records — 103° of scorching heat in July 2011 and a bone-chilling -20° in February 1967. Its wettest single day came from a September 1954 storm that dumped nearly 5 inches, while a March 2018 nor'easter buried the area under 16.6 inches of snow in one shot.
Summer peaks mid-July with average highs of 85°, making late July the sweet spot for warm-weather visits, while mid-January bottoms out at a frigid 33°. Spring is the wettest stretch of the year, with late March into early April averaging nearly an inch of precipitation per week. If you're planning around comfort, aim for June through August — but pack layers, because New Hampshire always keeps you guessing.