Weather forecast for todayMercersburg, PA

Weather forecast for today

Current condition 3:08 pm EDT

  • 55°F
  • Feels like:
    54°F
Sunny
Sunny
  • Precipitation: 0"
  • Wind: 13mphNNW 340°
  • Humidity: 35%
  • Dewpoint: 28°F
  • Pressure: 30.3"Hg
  • Visibility: 10mi
  • UV index: 3
  • ▼
Currently, sunlight is abundant, and the weather remains pleasant.
The temperature is a moderate 55.4°F, and the feels-like temperature is almost the same at 53.6°F. The current temperature is nearly at the maximum of today's expected 57.2°F.

Saturday Oct 17, 2026

  • 57°F
  • 36°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 12mphNNW 348°
  • Humidity: 36%
  • UV index: 3
  • Sunrise: 7:24 am EDT
  • Sunset: 6:29 pm EDT
  • ▼
Today, sunny skies are in store, with excellent visibility.
The maximum temperature will be a mild 57.2°F, while the minimum temperature will be a cold 35.6°F.
The forecasted high for today is forecasted to be relatively lower than the typical October maximum of 63.3°F.
Sunrise was at 7:24 am and sunset will be at 6:29 pm; the daylight will last for 11h and 5min.

Hourly overview

Hourly temperatures

Warmest period: 4 pm - 5 pm 55°C.
Coldest period: 11 pm - 12 am 43°C.

Chance of precipitation

Highest chance: 4 pm - 12 am 0%.

Hourly weather forecast

  • 4 pm
  • 55°F
  • Feels like:
    52°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 13mphNNW 346°
  • Humidity: 33%
  • Pressure: 30.3"Hg
  • Visibility: 10mi
  • UV index: 2
  • ▼
  • 5 pm
  • 55°F
  • Feels like:
    52°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 12mphNNW 348°
  • Humidity: 35%
  • Pressure: 30.3"Hg
  • Visibility: 10mi
  • UV index: 1
  • ▼
  • 6 pm
  • 52°F
  • Feels like:
    50°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 9mphNNW 347°
  • Humidity: 38%
  • Pressure: 30.33"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Sunset: 6:29 pm
  • 7 pm
  • 48°F
  • Feels like:
    46°F
Clear
Clear
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 7mphNNW 340°
  • Humidity: 44%
  • Pressure: 30.36"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 8 pm
  • 48°F
  • Feels like:
    45°F
Clear
Clear
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 6mphNNW 338°
  • Humidity: 46%
  • Pressure: 30.39"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 9 pm
  • 46°F
  • Feels like:
    43°F
Clear
Clear
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 6mphNNW 341°
  • Humidity: 51%
  • Pressure: 30.42"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 10 pm
  • 45°F
  • Feels like:
    43°F
Clear
Clear
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 5mphNNW 337°
  • Humidity: 54%
  • Pressure: 30.45"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 11 pm
  • 43°F
  • Feels like:
    41°F
Clear
Clear
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 4mphNNW 335°
  • Humidity: 58%
  • Pressure: 30.45"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 12 am
  • 43°F
  • Feels like:
    39°F
Clear
Clear
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 5mphNNW 337°
  • Humidity: 61%
  • Pressure: 30.47"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 1 am
  • 41°F
  • Feels like:
    37°F
Clear
Clear
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 5mphNNW 340°
  • Humidity: 63%
  • Pressure: 30.47"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
For the rest of Saturday, mostly cloudless and sunny weather is anticipated.
The temperature will be between a maximum of 55.4°F and a minimum of 42.8°F. The warmest part of the day will be at 4 pm and 5 pm.
The temperature is expected to be a couple of degrees lower than the average peak in October, which is 63.3°F. Today, expect the temperature to be more consistent with the typical minimum for November than for October.
Updated: Oct 17, 2026 @ 19:08:12 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

Currently (3:08 pm EDT) it is 55.4°F in Mercersburg.

Today, in Mercersburg, expect consistent sunshine and open skies.

Today, the maximum temperature will be 57.2°F, while the minimum temperature will be 35.6°F.
The maximum temperature will be slightly cooler than the average highest temperature of 63.3°F in October. Today, the lowest temperature will be notably lower than the average low of 45.5°F.

On Saturday, in Mercersburg, sunrise was at 7:24 am and sunset will be at 6:29 pm (EDT).

In Mercersburg, the length of the day today will be 11h and 5min.