Weather forecast for 10 daysMertztown, PA

Weather forecast for the weekend

Sunday Oct 18, 2026

  • 59°F
  • 34°F
Sunny
Sunny
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 2mphNNE 19°
  • Humidity: 52%
  • UV index: 4
  • Sunrise: 7:17 am EDT
  • Sunset: 6:18 pm EDT
  • ▼
Today, conditions will remain bright with clear skies.
The maximum temperature will be a refreshing 59°F, while the minimum predicted temperature is an icy 33.8°F.
Today's high is forecasted to coincide with the typical October maximum of 62.1°F.
Sunrise will be at 7:17 am and sunset at 6:18 pm; the daylight will last for 11h and 1min.

10-day overview

Daily temperatures

Warmest day: Tuesday 70°C.
Minimum temperature: 59°C.

Chance of precipitation

Highest chance: Sunday 25.10. 7%.

Long-term weather forecast

  • Sunday
  • Oct 18, 2026
  • 59°F
  • 34°F
Sunny
Sunny
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 2mphNNE 19°
  • Humidity: 52%
  • UV index: 4
  • Sunrise: 7:17 am EDT
  • Sunset: 6:18 pm EDT
  • ▼
  • Monday
  • Oct 19, 2026
  • 66°F
  • 43°F
Sunny
Sunny
  • Precip. probability: 6%
  • Precipitation: 0"
  • Wind: 6mphNNE 25°
  • Humidity: 57%
  • UV index: 4
  • Sunrise: 7:18 am EDT
  • Sunset: 6:16 pm EDT
  • ▼
  • Tuesday
  • Oct 20, 2026
  • 70°F
  • 41°F
Sunny
Sunny
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 9mphNNE 15°
  • Humidity: 51%
  • UV index: 4
  • Sunrise: 7:19 am EDT
  • Sunset: 6:15 pm EDT
  • ▼
  • Wednesday
  • Oct 21, 2026
  • 64°F
  • 43°F
Sunny
Sunny
  • Precip. probability: 4%
  • Precipitation: 0"
  • Wind: 9mphNNE 28°
  • Humidity: 51%
  • UV index: 4
  • Sunrise: 7:20 am EDT
  • Sunset: 6:14 pm EDT
  • ▼
  • Thursday
  • Oct 22, 2026
  • 66°F
  • 43°F
Sunny
Sunny
  • Precip. probability: 6%
  • Precipitation: 0"
  • Wind: 9mphN 353°
  • Humidity: 47%
  • UV index: 4
  • Sunrise: 7:21 am EDT
  • Sunset: 6:12 pm EDT
  • ▼
  • Friday
  • Oct 23, 2026
  • 61°F
  • 34°F
Sunny
Sunny
  • Precip. probability: 5%
  • Precipitation: 0"
  • Wind: 8mphNNE 13°
  • Humidity: 52%
  • UV index: 4
  • Sunrise: 7:22 am EDT
  • Sunset: 6:11 pm EDT
  • ▼
  • Saturday
  • Oct 24, 2026
  • 59°F
  • 32°F
Sunny
Sunny
  • Precip. probability: 4%
  • Precipitation: 0"
  • Wind: 5mphNE 40°
  • Humidity: 55%
  • UV index: 4
  • Sunrise: 7:23 am EDT
  • Sunset: 6:09 pm EDT
  • ▼
  • Sunday
  • Oct 25, 2026
  • 61°F
  • 34°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 7%
  • Precipitation: 0"
  • Wind: 4mphNNW 330°
  • Humidity: 57%
  • UV index: 4
  • Sunrise: 7:24 am EDT
  • Sunset: 6:08 pm EDT
  • ▼
  • Monday
  • Oct 26, 2026
  • 68°F
  • 43°F
Sunny
Sunny
  • Precip. probability: 6%
  • Precipitation: 0"
  • Wind: 6mphNW 323°
  • Humidity: 57%
  • UV index: 4
  • Sunrise: 7:26 am EDT
  • Sunset: 6:07 pm EDT
  • ▼
  • Tuesday
  • Oct 27, 2026
  • 64°F
  • 39°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 6%
  • Precipitation: 0"
  • Wind: 7mphN 353°
  • Humidity: 61%
  • UV index: 4
  • Sunrise: 7:27 am EDT
  • Sunset: 6:05 pm EDT
  • ▼
Primarily sun-filled and occasionally dull weather is anticipated.
Rainfall is not forecasted in Mertztown in the upcoming period.
In the upcoming days, the highest temperature will vary between 59°F and 69.8°F, while the lowest temperature will be between 32°F and 42.8°F.
Tuesday is expected to be the warmest, reaching up to 69.8°F; Sunday and Saturday, with the highest temperature of 59°F, will be the coldest days.
Updated: Oct 18, 2026 @ 11:05:43 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

On Sunday, sunshine is forecasted under mostly clear skies.

Today, the maximum temperature will be 59°F, while the minimum temperature will be 33.8°F.
The highest temperature today will be in line with the average maximum temperature in October. The lowest temperature will be noticeably lower than the average low of 46°F.

On Sunday, in Mertztown, sunrise will be at 7:17 am and sunset at 6:18 pm (EDT).

In Mertztown, the length of the day today will be 11h and 1min.