Weather forecast for tomorrow
Grantham, NH

Weather forecast for tomorrow

Thursday, Jun 19.

PM Thunderstorms
5:05 am

8:34 pm
EDT
PM Thunderstorms
86°F / 63°F
  • Wind: 12mph SSW
  • Humidity: 73%
  • Precip. probability: 72%
  • Precipitation: 0.51"
  • UV index: 8
Tomorrow, rain with scattered lightning is expected during the afternoon.
The likelihood of rainfall is high, and precipitation will be moderate. Temperatures are anticipated to range from a maximum of a tropical 86°F to a minimum of a comfortable 62.6°F.
The maximum heat index, which represents the influence of relative humidity on air temperature, is assessed at a very hot 96.8°F. Take into consideration that the heat index values are calculated for shade and light wind conditions. Bear in mind that direct sunshine exposure increases weather impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees.
The projected high resembles July more than June, matching 78.8°F rather than 72°F.
Sunrise will be at 5:05 am and sunset at 8:34 pm; tomorrow's daylight will last for 15h and 29min.

Frequently asked questions

What is the weather forecast for Grantham for tomorrow?
Tomorrow, afternoon storms could include thunder and brief downpours.
Will it rain tomorrow?
Moderate precipitation of 0.51" is anticipated. The likelihood of rainfall is 72%.
What will be the maximum temperature tomorrow?
Tomorrow, the highest temperature in Grantham will be 86°F, while the lowest temperature will be 62.6°F. The maximum heat index, which combines air temperature and relative humidity, is appraised at 96.8°F.
The highest temperature will be notably higher than the average maximum of 72°F in June. The lowest temperature will be also significantly higher than the average low of 50.9°F.
When is the sunrise / sunset tomorrow?
On Thursday, in Grantham, sunrise will be at 5:05 am and sunset at 8:34 pm (EDT).
How many hours of daylight will Grantham have tomorrow?
Tomorrow, the daylight will last for 15h and 29min.

Hourly weather forecast

12 am
  • 68°F
  • Feels like:
    70°F
Mostly Cloudy
Mostly Cloudy
  • Wind: 2mph S
  • Pressure: 29.83"Hg
  • Humidity: 99%
  • Precip. probability: 11%
  • Precipitation: 0"
  • Visibility: 5mi
2 am
  • 66°F
  • Feels like:
    68°F
Cloudy
Cloudy
  • Wind: 1mph S
  • Pressure: 29.83"Hg
  • Humidity: 97%
  • Precip. probability: 10%
  • Precipitation: 0"
  • Visibility: 1mi
4 am
  • 66°F
  • Feels like:
    68°F
Foggy
Foggy
  • Wind: 1mph S
  • Pressure: 29.8"Hg
  • Humidity: 97%
  • Precip. probability: 10%
  • Precipitation: 0"
  • Visibility: 0mi
Sunrise: 5:05 am
6 am
  • 66°F
  • Feels like:
    70°F
Foggy
Foggy
  • Wind: 1mph S
  • Pressure: 29.8"Hg
  • Humidity: 100%
  • Precip. probability: 10%
  • Precipitation: 0"
  • Visibility: 0mi
8 am
  • 70°F
  • Feels like:
    72°F
Cloudy
Cloudy
  • Wind: 2mph SSW
  • Pressure: 29.77"Hg
  • Humidity: 93%
  • Precip. probability: 13%
  • Precipitation: 0"
  • Visibility: 4mi
10 am
  • 75°F
  • Feels like:
    79°F
Mostly Cloudy
Mostly Cloudy
  • Wind: 4mph SSW
  • Pressure: 29.74"Hg
  • Humidity: 80%
  • Precip. probability: 12%
  • Precipitation: 0"
  • Visibility: 10mi
12 pm
  • 82°F
  • Feels like:
    86°F
Partly Cloudy
Partly Cloudy
  • Wind: 7mph SSW
  • Pressure: 29.71"Hg
  • Humidity: 65%
  • Precip. probability: 8%
  • Precipitation: 0"
  • Visibility: 10mi
2 pm
  • 84°F
  • Feels like:
    90°F
Scattered Thunderstorms
Scattered Thunderstorms
  • Wind: 11mph SSW
  • Pressure: 29.65"Hg
  • Humidity: 59%
  • Precip. probability: 48%
  • Precipitation: 0.08"
  • Visibility: 7mi
4 pm
  • 84°F
  • Feels like:
    88°F
Scattered Thunderstorms
Scattered Thunderstorms
  • Wind: 11mph SSW
  • Pressure: 29.59"Hg
  • Humidity: 63%
  • Precip. probability: 46%
  • Precipitation: 0.08"
  • Visibility: 7mi
6 pm
  • 79°F
  • Feels like:
    82°F
Thunderstorms
Thunderstorms
  • Wind: 12mph SW
  • Pressure: 29.59"Hg
  • Humidity: 70%
  • Precip. probability: 73%
  • Precipitation: 0.12"
  • Visibility: 6mi
8 pm
  • 75°F
  • Feels like:
    79°F
Cloudy
Cloudy
  • Wind: 9mph SW
  • Pressure: 29.59"Hg
  • Humidity: 78%
  • Precip. probability: 24%
  • Precipitation: 0"
  • Visibility: 7mi
Sunset: 8:34 pm
10 pm
  • 72°F
  • Feels like:
    72°F
Cloudy
Cloudy
  • Wind: 7mph SW
  • Pressure: 29.62"Hg
  • Humidity: 84%
  • Precip. probability: 17%
  • Precipitation: 0"
  • Visibility: 9mi
Tomorrow, weather will be unstable, and a combination of primarily cloud-filled and occasionally stormy, foggy and rain-soaked weather is predicted.
Rainfall is expected from 2 pm to 7 pm and at 9 pm. With moderate precipitation of 0.16", most rainfall is expected at 5 pm.
The temperature will be between the lowest temperature of 66.2°F and the highest temperature of 84.2°F. The hottest part of the day will be from 1 pm to 4 pm.
The temperature will be more close to what’s typical for July than the usual maximum in June. Forecast models suggest a low also more comparable to July's typical minimum of 57.2°F than June's usual 50.9°F.
Updated: Jun 18, 2025 @ 13:12:43 UTC
Published by: Weather U.S. | About Us
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