Weather forecast for 10 daysMerrimack, NH

Weather forecast for the weekend

Saturday Oct 17, 2026

  • 48°F
  • 28°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 15mphNNW 328°
  • Humidity: 44%
  • UV index: 4
  • Sunrise: 7:02 am EDT
  • Sunset: 6:00 pm EDT
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Today, sun and clouds will share the sky, creating a partly cloudy day.
The temperature will fluctuate from a high of a chilly 48.2°F to a low of a harsh 28.4°F.
The weather today is colder, with a maximum expected near 46.6°F - more like November than October.
Sunrise was at 7:02 am and sunset will be at 6:00 pm; the daylight will last for 10h and 59min.

Sunday Oct 18, 2026

  • 57°F
  • 32°F
Sunny
Sunny
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 4mphSW 227°
  • Humidity: 47%
  • UV index: 4
  • Sunrise: 7:03 am EDT
  • Sunset: 5:58 pm EDT
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Tomorrow, in Merrimack, bright and sunny weather is expected.
Temperatures are forecasted to range from a maximum of a mild 57.2°F to a minimum of a wintry 32°F.
Tomorrow, the forecasted maximum temperature should be consistent with October's typical high of 59.2°F.
Sunrise will be at 7:03 am and sunset at 5:58 pm; tomorrow's daylight will last for 10h and 56min.

10-day overview

Daily temperatures

Maximum temperature: 66°C.
Coldest day: today 48°C.

Chance of precipitation

Highest chance: Monday 26.10. 18%.

Long-term weather forecast

  • Saturday
  • Oct 17, 2026
  • 48°F
  • 28°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 15mphNNW 328°
  • Humidity: 44%
  • UV index: 4
  • Sunrise: 7:02 am EDT
  • Sunset: 6:00 pm EDT
  • ▼
  • Sunday
  • Oct 18, 2026
  • 57°F
  • 32°F
Sunny
Sunny
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 4mphSW 227°
  • Humidity: 47%
  • UV index: 4
  • Sunrise: 7:03 am EDT
  • Sunset: 5:58 pm EDT
  • ▼
  • Monday
  • Oct 19, 2026
  • 63°F
  • 39°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 6%
  • Precipitation: 0"
  • Wind: 5mphESE 119°
  • Humidity: 61%
  • UV index: 4
  • Sunrise: 7:04 am EDT
  • Sunset: 5:57 pm EDT
  • ▼
  • Tuesday
  • Oct 20, 2026
  • 66°F
  • 39°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 6%
  • Precipitation: 0"
  • Wind: 8mphNNE 13°
  • Humidity: 60%
  • UV index: 3
  • Sunrise: 7:05 am EDT
  • Sunset: 5:55 pm EDT
  • ▼
  • Wednesday
  • Oct 21, 2026
  • 59°F
  • 37°F
Sunny
Sunny
  • Precip. probability: 5%
  • Precipitation: 0"
  • Wind: 9mphNE 39°
  • Humidity: 58%
  • UV index: 3
  • Sunrise: 7:06 am EDT
  • Sunset: 5:54 pm EDT
  • ▼
  • Thursday
  • Oct 22, 2026
  • 59°F
  • 41°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 14%
  • Precipitation: 0"
  • Wind: 6mphN 5°
  • Humidity: 66%
  • UV index: 3
  • Sunrise: 7:08 am EDT
  • Sunset: 5:52 pm EDT
  • ▼
  • Friday
  • Oct 23, 2026
  • 59°F
  • 41°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 10%
  • Precipitation: 0"
  • Wind: 8mphNNE 12°
  • Humidity: 58%
  • UV index: 3
  • Sunrise: 7:09 am EDT
  • Sunset: 5:51 pm EDT
  • ▼
  • Saturday
  • Oct 24, 2026
  • 57°F
  • 39°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 13%
  • Precipitation: 0"
  • Wind: 7mphNNE 24°
  • Humidity: 61%
  • UV index: 3
  • Sunrise: 7:10 am EDT
  • Sunset: 5:49 pm EDT
  • ▼
  • Sunday
  • Oct 25, 2026
  • 61°F
  • 41°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 13%
  • Precipitation: 0"
  • Wind: 6mphNNE 20°
  • Humidity: 65%
  • UV index: 3
  • Sunrise: 7:11 am EDT
  • Sunset: 5:48 pm EDT
  • ▼
  • Monday
  • Oct 26, 2026
  • 66°F
  • 43°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 18%
  • Precipitation: 0"
  • Wind: 6mphNNW 342°
  • Humidity: 64%
  • UV index: 3
  • Sunrise: 7:12 am EDT
  • Sunset: 5:46 pm EDT
  • ▼
It is expected that a combination of cloudy and clear weather is forecasted.
Rain is not anticipated in Merrimack in the upcoming period.
The temperature will vary considerably in the next ten days. Highs will range from 48.2°F to 66.2°F, while the lowest night temperatures will vary also significantly, as the minimum temperature is expected to range between 28.4°F and 42.8°F.
The warmest days will be Tuesday and next Monday, with a maximum of 66.2°F; today is the coldest day, with a maximum temperature of 48.2°F.
Updated: Oct 17, 2026 @ 13:55:27 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

On Saturday, in Merrimack, thin clouds will pass through at times, but overall, it will remain bright.

Today, the highest temperature will be 48.2°F, while the lowest temperature will be 28.4°F.
The highest temperature will be noticeably lower than the average maximum of 59.2°F in October. The lowest temperature will be also uncommonly lower than the average low of 44.6°F.

On Saturday, in Merrimack, sunrise was at 7:02 am and sunset will be at 6:00 pm (EDT).

Today, the daylight will last for 10h and 59min.

Tomorrow, in Merrimack, sunshine and minimal clouds are in the outlook.

Tomorrow, the highest temperature will be 57.2°F, while the lowest temperature will be 32°F.
The maximum temperature will be in line with the average highest temperature of 59.2°F in October. Tomorrow, the lowest temperature will be noticeably lower than the average low of 44.6°F.

On Sunday, in Merrimack, sunrise will be at 7:03 am and sunset at 5:58 pm (EDT).

Tomorrow, the daylight will last for 10h and 56min.