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Grantham, NH Weather Forecast

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Grantham, NH Weather Forecast

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Grantham NH weather - Mist - 58°F
Mist
58°F
Updated 11:33 am
Feels Like 61°F
Humidity 83%
Wind N 0 mph
Barometer  30.12 in
Dew Point 53°F
Grantham NH weather - Mist - 14°C
Mist
14°C
Updated 11:33 am
Feels Like 16°C
Humidity 83%
Wind N 0 km/h
Barometer  102 kPa
Dew Point 12°C
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Grantham Weather Forecast

TODAY TONIGHT THURSDAY THURSDAY NIGHT FRIDAY FRIDAY NIGHT SATURDAY SATURDAY NIGHT SUNDAY SUNDAY NIGHT MONDAY MONDAY NIGHT
Grantham, NH Weather - Today Patchy Fog Grantham, NH Weather - Tonight Patchy Fog Grantham, NH Weather - Thursday Patchy Fog Grantham, NH Weather - Thursday Night Partly Cloudy Grantham, NH Weather - Friday Showers Likely Grantham, NH Weather - Friday Night Chance Of Showers Grantham, NH Weather - Saturday Mostly Sunny Grantham, NH Weather - Saturday Night Partly Cloudy Grantham, NH Weather - Sunday Partly Sunny Grantham, NH Weather - Sunday Night Chance Of Showers Grantham, NH Weather - Monday Partly Sunny Grantham, NH Weather - Monday Night Mostly Clear
Patchy Fog Patchy Fog Patchy Fog Partly Cloudy Showers Likely Chance of Showers Mostly Sunny Partly Cloudy Partly Sunny Chance of Showers Partly Sunny Mostly Clear
Hi: 69°FHi: 21°C
 Lo: 51°FLo: 11°C Hi: 71°FHi: 22°C
 Lo: 60°FLo: 16°C Hi: 71°FHi: 22°C
 Lo: 49°FLo: 9°C Hi: 61°FHi: 16°C
 Lo: 40°FLo: 4°C Hi: 61°FHi: 16°C
 Lo: 45°FLo: 7°C Hi: 59°FHi: 15°C
 Lo: 35°FLo: 2°C
POP: 70% POP: 50% POP: 40%
POP = Probability of Precipitation.
Weather Outlook Updated: 801 AM EDT Wed Sep 30 2026 Grantham, NH Weather - WeatherWorld.com

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Issued: 625 AM EDT Wed Sep 30 2026

Key Messages

1. Temperatures continue an upward trend today into Thursday with high pressure providing fair weather.

2. Strong cold fronts Friday then again Monday cross the region, bringing brief rain chances and bursts of crisp fall weather.


Discussion

... KEY MESSAGE 1 DESCRIPTION...

Broad high pressure along the East Coast will become centered south of New England today through Thursday. This will provide fair weather while parts of today will feature more clouds than sun with more in the way of ...