Weather forecast for 10 daysGrantham, NH

Weather forecast for the weekend

Saturday Oct 17, 2026

  • 43°F
  • 27°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 11mphNW 322°
  • Humidity: 41%
  • UV index: 3
  • Sunrise: 7:05 am EDT
  • Sunset: 6:02 pm EDT
  • ▼
On Saturday, in Grantham, some passing clouds may drift through, but the sun will shine at times.
The highest forecasted temperature is a chilly 42.8°F, while the lowest temperature will be a freezing 26.6°F.
It will be colder, and the temperature will align more closely with November's average high of 42.6°F than October's.
Sunrise was at 7:05 am and sunset will be at 6:02 pm; the daylight will last for 10h and 57min.

Sunday Oct 18, 2026

  • 55°F
  • 30°F
Sunny
Sunny
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 4mphSW 227°
  • Humidity: 52%
  • UV index: 3
  • Sunrise: 7:06 am EDT
  • Sunset: 6:00 pm EDT
  • ▼
Tomorrow, on Sunday, October 18, sunny conditions are expected to continue.
The temperature scale will run from a maximum of a moderate 55.4°F to a minimum of a harsh 30.2°F.
October's standard high of 55.9°F is predicted to be reached during the day.
Sunrise will be at 7:06 am and sunset at 6:00 pm; tomorrow's daylight will last for 10h and 54min.

10-day overview

Daily temperatures

Warmest period: Monday - Tuesday 64°C.
Coldest day: today 43°C.

Chance of precipitation

Highest chance: Monday 26.10. 13%.

Long-term weather forecast

  • Saturday
  • Oct 17, 2026
  • 43°F
  • 27°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 11mphNW 322°
  • Humidity: 41%
  • UV index: 3
  • Sunrise: 7:05 am EDT
  • Sunset: 6:02 pm EDT
  • ▼
  • Sunday
  • Oct 18, 2026
  • 55°F
  • 30°F
Sunny
Sunny
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 4mphSW 227°
  • Humidity: 52%
  • UV index: 3
  • Sunrise: 7:06 am EDT
  • Sunset: 6:00 pm EDT
  • ▼
  • Monday
  • Oct 19, 2026
  • 64°F
  • 39°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 6%
  • Precipitation: 0"
  • Wind: 2mphS 176°
  • Humidity: 57%
  • UV index: 3
  • Sunrise: 7:07 am EDT
  • Sunset: 5:59 pm EDT
  • ▼
  • Tuesday
  • Oct 20, 2026
  • 64°F
  • 32°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 8%
  • Precipitation: 0"
  • Wind: 7mphN 352°
  • Humidity: 59%
  • UV index: 3
  • Sunrise: 7:09 am EDT
  • Sunset: 5:57 pm EDT
  • ▼
  • Wednesday
  • Oct 21, 2026
  • 57°F
  • 30°F
Sunny
Sunny
  • Precip. probability: 8%
  • Precipitation: 0"
  • Wind: 4mphENE 65°
  • Humidity: 59%
  • UV index: 3
  • Sunrise: 7:10 am EDT
  • Sunset: 5:56 pm EDT
  • ▼
  • Thursday
  • Oct 22, 2026
  • 61°F
  • 34°F
Sunny
Sunny
  • Precip. probability: 8%
  • Precipitation: 0"
  • Wind: 6mphNNW 343°
  • Humidity: 64%
  • UV index: 3
  • Sunrise: 7:11 am EDT
  • Sunset: 5:54 pm EDT
  • ▼
  • Friday
  • Oct 23, 2026
  • 54°F
  • 30°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 10%
  • Precipitation: 0"
  • Wind: 7mphN 352°
  • Humidity: 59%
  • UV index: 3
  • Sunrise: 7:12 am EDT
  • Sunset: 5:52 pm EDT
  • ▼
  • Saturday
  • Oct 24, 2026
  • 55°F
  • 30°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 7%
  • Precipitation: 0"
  • Wind: 6mphN 6°
  • Humidity: 59%
  • UV index: 3
  • Sunrise: 7:14 am EDT
  • Sunset: 5:51 pm EDT
  • ▼
  • Sunday
  • Oct 25, 2026
  • 59°F
  • 36°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 5%
  • Precipitation: 0"
  • Wind: 5mphNNW 341°
  • Humidity: 55%
  • UV index: 3
  • Sunrise: 7:15 am EDT
  • Sunset: 5:49 pm EDT
  • ▼
  • Monday
  • Oct 26, 2026
  • 61°F
  • 39°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 13%
  • Precipitation: 0"
  • Wind: 6mphNW 312°
  • Humidity: 59%
  • UV index: 3
  • Sunrise: 7:16 am EDT
  • Sunset: 5:48 pm EDT
  • ▼
Over the next ten days, a combination of dry and sunny and overcast weather is predicted.
Rain is not expected in Grantham in the upcoming days.
Temperature differences will be noticeable across the forecast period. Forecast highs will fluctuate between 42.8°F and 64.4°F, while the lowest night temperatures will vary also significantly, as the minimum temperature is expected to range between 26.6°F and 39.2°F.
With a maximum temperature of 64.4°F, Monday and Tuesday will be the warmest days; today is the coldest day, with a maximum temperature of 42.8°F.
Updated: Oct 17, 2026 @ 17:20:16 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

Today, some passing clouds may drift through, but the sun will shine at times.

Today, the highest temperature will be 42.8°F, while the lowest temperature will be 26.6°F.
The highest temperature today will be notably lower than the average maximum of 55.9°F in October. The lowest temperature today will be also noticeably lower than the average low of 40.6°F.

On Saturday, in Grantham, sunrise was at 7:05 am and sunset will be at 6:02 pm (EDT).

In Grantham, today, there will be 10h and 57min of daylight.

On Sunday, sunny and dry conditions are anticipated.

Tomorrow, the highest temperature in Grantham will be 55.4°F, while the lowest temperature will be 30.2°F.
The highest temperature tomorrow will be in line with the average maximum temperature in October. The lowest temperature will be notably lower than the average low of 40.6°F.

On Sunday, in Grantham, sunrise will be at 7:06 am and sunset at 6:00 pm (EDT).

Tomorrow, the daylight will last for 10h and 54min.