How Crowded Is Lowell in May?
May is a quiet month at Lowell National Historical Park, running about 0.8× the park's average month — roughly 7% of the year's visitors come in May. That puts it between the July peak and the December low. Overall our best-time score rates May as "Excellent" for a visit. Typical May weather averages a high near 70°F and a low around 45°F, with about 3.8" of precipitation. You'll get about 14.4 hours of daylight to explore.
Frequently Asked Questions
May is quiet at Lowell National Historical Park (about 0.8× the average month). Our best-time score rates it "Excellent". The single best month overall is September.
The busiest month is July and the quietest is December. May sits at about 0.8× the park's average, or 7% of annual visitation.
Source: National Park Service Visitor Use Statistics (1979–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-06-20.