Frost Advisory Will Impact New Hampshire

The National Weather Service issued a frost advisory for southern New Hampshire starting at midnight.

Updated on Oct. 6, 2026 in Forecasts

Macro detail of ice crystals on fallen leaves on a forest floor, illustrating an autumn frost advisory. — The National Weather Service issued a frost advisory for southern New Hampshire as overnight temperatures drop into the 30s starting Tuesday. AI Illustration. Upload story photo >

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A frost advisory will take effect across southern New Hampshire beginning October 7, 2026. Overnight temperatures are expected to drop into the 30s as the advisory persists through the early morning hours.

Why it matters

The advisory alerts residents to cold conditions that could harm sensitive outdoor vegetation and require protective measures. It marks a significant shift in weather as temperatures begin to reach near-freezing levels across the state.

A frost advisory is in effect for southern New Hampshire with temperatures falling into the 30s, while a hard freeze is possible in central and northern regions. The conditions remain in effect until Wednesday at 8 a.m.

The players

National Weather Service

This federal agency is responsible for providing weather forecasts, warnings, and hazardous weather information to the public.

The details

Central and northern parts of the state face the potential for a hard freeze as cold air moves through the area. Conditions are expected to moderate on Wednesday with rising temperatures, though showers are forecast to return later in the week.

The frost advisory begins at 12:00 a.m. on October 7, 2026.
The frost advisory expires at 8:00 a.m. on October 7, 2026.

Seasonal Patterns

This frost advisory follows the National Weather Service's Frost Advisory criteria for temperatures dipping into the 30s. The alert marks a standard transition into colder autumn conditions that frequently trigger protective measures for sensitive vegetation across the state.

Residents in southern New Hampshire should cover sensitive plants or bring potted vegetation indoors to prevent damage from the expected frost. Motorists should remain alert for potentially slick spots on roads during the early morning hours until the advisory ends.

The takeaway

The arrival of freezing temperatures serves as a reminder to finalize winter preparations for home gardens and outdoor equipment. Keeping track of local forecasts will be essential as the region prepares for changing conditions throughout the remainder of the week.