Weather forecast for 10 daysMercersburg, PA
Weather forecast for the weekend
Sunday Oct 18, 2026
- 61°F
- 36°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 2mphNE 47°
- Humidity: 37%
- UV index: 4
- Sunrise: 7:25 am EDT
- Sunset: 6:28 pm EDT
- details ▼
On Sunday, in Mercersburg, sunny conditions are expected to continue.
The temperature scale will run from a maximum of an enjoyable 60.8°F to a minimum of a wintry 35.6°F.
The maximum temperature today is anticipated to reflect October's average high of 63.3°F.
Sunrise was at 7:25 am and sunset will be at 6:28 pm; the daylight will last for 11h and 3min.
The temperature scale will run from a maximum of an enjoyable 60.8°F to a minimum of a wintry 35.6°F.
The maximum temperature today is anticipated to reflect October's average high of 63.3°F.
Sunrise was at 7:25 am and sunset will be at 6:28 pm; the daylight will last for 11h and 3min.
10-day overview
Daily temperatures
Maximum temperature: 72°C.
Coldest day: today 61°C.
Coldest day: today 61°C.
Chance of precipitation
Highest chance: Tuesday 27.10. 11%.
Long-term weather forecast
- Sunday
- Oct 18, 2026
- 61°F
- 36°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 2mphNE 47°
- Humidity: 37%
- UV index: 4
- Sunrise: 7:25 am EDT
- Sunset: 6:28 pm EDT
- details ▼
- Monday
- Oct 19, 2026
- 68°F
- 45°F
Sunny
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 7mphN 356°
- Humidity: 48%
- UV index: 4
- Sunrise: 7:26 am EDT
- Sunset: 6:26 pm EDT
- details ▼
- Tuesday
- Oct 20, 2026
- 72°F
- 43°F
Sunny
- Precip. probability: 3%
- Precipitation: 0"
- Wind: 9mphN 356°
- Humidity: 49%
- UV index: 4
- Sunrise: 7:27 am EDT
- Sunset: 6:25 pm EDT
- details ▼
- Wednesday
- Oct 21, 2026
- 68°F
- 41°F
Sunny
- Precip. probability: 6%
- Precipitation: 0"
- Wind: 7mphN 2°
- Humidity: 49%
- UV index: 4
- Sunrise: 7:28 am EDT
- Sunset: 6:23 pm EDT
- details ▼
- Thursday
- Oct 22, 2026
- 68°F
- 45°F
Sunny
- Precip. probability: 4%
- Precipitation: 0"
- Wind: 9mphNNW 341°
- Humidity: 45%
- UV index: 4
- Sunrise: 7:29 am EDT
- Sunset: 6:22 pm EDT
- details ▼
- Friday
- Oct 23, 2026
- 63°F
- 36°F
Sunny
- Precip. probability: 6%
- Precipitation: 0"
- Wind: 8mphNNE 13°
- Humidity: 52%
- UV index: 4
- Sunrise: 7:30 am EDT
- Sunset: 6:21 pm EDT
- details ▼
- Saturday
- Oct 24, 2026
- 63°F
- 36°F
Mostly Sunny
- Precip. probability: 6%
- Precipitation: 0"
- Wind: 5mphNE 55°
- Humidity: 54%
- UV index: 4
- Sunrise: 7:31 am EDT
- Sunset: 6:19 pm EDT
- details ▼
- Sunday
- Oct 25, 2026
- 64°F
- 37°F
Mostly Sunny
- Precip. probability: 7%
- Precipitation: 0"
- Wind: 5mphNW 317°
- Humidity: 55%
- UV index: 4
- Sunrise: 7:32 am EDT
- Sunset: 6:18 pm EDT
- details ▼
- Monday
- Oct 26, 2026
- 72°F
- 45°F
Partly Cloudy
- Precip. probability: 6%
- Precipitation: 0"
- Wind: 6mphNW 317°
- Humidity: 57%
- UV index: 4
- Sunrise: 7:33 am EDT
- Sunset: 6:17 pm EDT
- details ▼
- Tuesday
- Oct 27, 2026
- 68°F
- 45°F
Partly Cloudy
- Precip. probability: 11%
- Precipitation: 0"
- Wind: 7mphNNW 348°
- Humidity: 59%
- UV index: 4
- Sunrise: 7:35 am EDT
- Sunset: 6:15 pm EDT
- details ▼
During the upcoming ten-day period, primarily clear and occasionally cloudy weather is predicted.
Rainfall is not anticipated in Mercersburg in the upcoming period.
In the upcoming period, the highest temperature will range between 60.8°F and 71.6°F, while nighttime temperatures are expected to vary from 35.6°F to 44.6°F.
Tuesday and next Monday, with the highest temperature of 71.6°F, will be the warmest days; today is the coldest day, with a maximum temperature of 60.8°F.
Rainfall is not anticipated in Mercersburg in the upcoming period.
In the upcoming period, the highest temperature will range between 60.8°F and 71.6°F, while nighttime temperatures are expected to vary from 35.6°F to 44.6°F.
Tuesday and next Monday, with the highest temperature of 71.6°F, will be the warmest days; today is the coldest day, with a maximum temperature of 60.8°F.
Updated: Oct 18, 2026 @ 14:18:51 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate
Frequently asked questions
On Sunday, sunshine is expected with little to no cloud cover.
Today, the highest temperature will be 60.8°F, while the lowest temperature will be 35.6°F.
Today, the maximum temperature will be in line with the average highest temperature in October. The lowest temperature will be significantly lower than the average low of 45.5°F.
Today, the maximum temperature will be in line with the average highest temperature in October. The lowest temperature will be significantly lower than the average low of 45.5°F.
On Sunday, in Mercersburg, sunrise was at 7:25 am and sunset will be at 6:28 pm (EDT).
In Mercersburg, today, there will be 11h and 3min of daylight.
