Manchester, New Hampshire – Scorching heat will grip southern New Hampshire Tuesday, July 29th, pushing the heat index close to 100 degrees along the I-93 corridor and putting residents at risk for heat-related illness. Expect the hottest conditions from 11 a.m. to 8 p.m., when a Heat Advisory remains in effect for Manchester, Nashua, and much of Rockingham, Merrimack, and Hillsborough counties.
According to the National Weather Service in Gray, Maine, heat index values will climb into the middle and upper 90s Tuesday afternoon, with little overnight relief. The advisory highlights the risk of dehydration, heat exhaustion, and even heat stroke, especially for those without air conditioning or those working outside. Officials urge everyone to drink plenty of fluids, stay out of direct sun, and check on neighbors and relatives—especially the elderly.
Hot, humid weather could also affect travel along I-93, Route 3, and local roadways, with increased risk of heat exhaustion for stranded drivers. City parks and pools may see larger crowds, and cooling centers are open in Manchester for anyone needing a safe place to escape the heat. Those with outdoor plans or work should reschedule for early morning or late evening hours.
Wednesday brings a chance of showers and thunderstorms by late afternoon, providing some brief relief, but the heat will linger until a cold front moves through midweek. The upcoming weekend offers a break, with dry, comfortable summer weather taking over as August begins.
Five-Day Forecast for Manchester, NH
- Tuesday, July 29: Sunny, dangerously hot. High 98°F. Heat index up to 100°. Light wind. Heat Advisory 11 a.m.–8 p.m.
- Wednesday, July 30: Showers and storms possible after 2 p.m. High 94°F. Chance of precipitation 40%.
- Thursday, July 31: Partly sunny, cooler. High near 79°F. Low humidity returns.
- Friday, August 1: Mostly clear, refreshing. High 80°F, low 54°F.
- Saturday, August 2: Sunny, pleasant. High 85°F.
- Sunday, August 3: Continued sunshine, high near 85°F.
Stay alert for additional advisories and remember: the worst heat is Tuesday, July 29th. More updates will be issued if conditions change.
