Weather forecast for tomorrowNorthumberland, PA

Weather forecast for tomorrow

Monday Oct 19, 2026

  • 68°F
  • 41°F
Sunny
Sunny
  • Precip. probability: 7%
  • Precipitation: 0"
  • Wind: 4mphN 2°
  • Humidity: 61%
  • UV index: 4
  • Sunrise: 7:23 am EDT
  • Sunset: 6:21 pm EDT
  • ▼
Tomorrow, in Northumberland, expect consistent sunshine and open skies.
A stark contrast will be evident between the daytime peak temperature of an agreeable 68°F and the nighttime low of a wintry 41°F.
Meteorological data shows 68°F is more characteristic of September's climate profile than October's.
Sunrise will be at 7:23 am and sunset at 6:21 pm; tomorrow's daylight will last for 10h and 58min.

Hourly overview

Hourly temperatures

Warmest hour: 3 pm 66°C.
Coldest hour: 6 am 34°C.

Chance of precipitation

Highest chance: 6 am 7%.

Hourly weather forecast

  • 12 am
  • 37°F
  • Feels like:
    37°F
Clear
Clear
  • Precip. probability: 5%
  • Precipitation: 0"
  • Wind: 0mphN 355°
  • Humidity: 97%
  • Pressure: 30.5"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 2 am
  • 37°F
  • Feels like:
    37°F
Clear
Clear
  • Precip. probability: 6%
  • Precipitation: 0"
  • Wind: 0mphN 356°
  • Humidity: 99%
  • Pressure: 30.5"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 4 am
  • 34°F
  • Feels like:
    34°F
Clear
Clear
  • Precip. probability: 6%
  • Precipitation: 0"
  • Wind: 1mphNNW 339°
  • Humidity: 100%
  • Pressure: 30.5"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 6 am
  • 34°F
  • Feels like:
    34°F
Clear
Clear
  • Precip. probability: 7%
  • Precipitation: 0"
  • Wind: 1mphNNW 345°
  • Humidity: 100%
  • Pressure: 30.5"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Sunrise: 7:23 am
  • 8 am
  • 34°F
  • Feels like:
    34°F
Sunny
Sunny
  • Precip. probability: 7%
  • Precipitation: 0"
  • Wind: 1mphN 351°
  • Humidity: 100%
  • Pressure: 30.5"Hg
  • Visibility: 8mi
  • UV index: 0
  • ▼
  • 10 am
  • 45°F
  • Feels like:
    45°F
Sunny
Sunny
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 1mphN 10°
  • Humidity: 76%
  • Pressure: 30.47"Hg
  • Visibility: 10mi
  • UV index: 2
  • ▼
  • 12 pm
  • 55°F
  • Feels like:
    55°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 2mphN 8°
  • Humidity: 51%
  • Pressure: 30.42"Hg
  • Visibility: 10mi
  • UV index: 4
  • ▼
  • 2 pm
  • 64°F
  • Feels like:
    64°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 3mphN 7°
  • Humidity: 39%
  • Pressure: 30.36"Hg
  • Visibility: 10mi
  • UV index: 4
  • ▼
  • 4 pm
  • 66°F
  • Feels like:
    66°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 3mphN 353°
  • Humidity: 39%
  • Pressure: 30.3"Hg
  • Visibility: 10mi
  • UV index: 1
  • ▼
  • 6 pm
  • 61°F
  • Feels like:
    61°F
Sunny
Sunny
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 2mphN 4°
  • Humidity: 51%
  • Pressure: 30.27"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Sunset: 6:21 pm
  • 8 pm
  • 52°F
  • Feels like:
    52°F
Clear
Clear
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 2mphN 358°
  • Humidity: 66%
  • Pressure: 30.27"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 10 pm
  • 46°F
  • Feels like:
    46°F
Clear
Clear
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 2mphN 352°
  • Humidity: 72%
  • Pressure: 30.27"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Tomorrow, on Monday, primarily mostly clear and occasionally dull weather is expected.
The temperature will vary between a minimum of 32°F and a maximum of 66.2°F. The warmest part of the day will be at 3 pm and 4 pm.
The day’s peak temperature will reflect September's norm of 73.2°F more than October's 61.2°F. The temperature low is forecasted to be in line with the usual October value of 44.2°F.
Updated: Oct 18, 2026 @ 11:35:22 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

Tomorrow, expect sunny weather with a crisp, clear sky.

Tomorrow, the highest temperature will be 68°F, while the lowest temperature will be 41°F.
The maximum temperature will be a couple of degrees higher than the average highest temperature of 61.2°F in October. The lowest temperature will be in line with the average low of 44.2°F.

On Monday, in Northumberland, sunrise will be at 7:23 am and sunset at 6:21 pm (EDT).

In Northumberland, tomorrow, there will be 10h and 58min of daylight.