Weather forecast for tomorrow
Mertztown, PA

Weather forecast for tomorrow

Thursday, Jun 19.

PM Thunderstorms
5:30 am

8:37 pm
EDT
PM Thunderstorms
88°F / 61°F
  • Wind: 13mph SW
  • Humidity: 72%
  • Precip. probability: 76%
  • Precipitation: 0.28"
  • UV index: 9
Tomorrow, on Thursday, June 19, passing thunderstorms may develop after midday.
The chance of precipitation is high. However, the rain will be light. The temperature will peak at a blazing 87.8°F during the day, dropping to a low of a breezy 60.8°F at night.
The maximum heat index, which combines relative humidity and air temperature, is estimated at a torrid 100.4°F. Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
With a forecast of 87.8°F, the day’s weather feels closer to July than June.
Sunrise will be at 5:30 am and sunset at 8:37 pm; tomorrow's daylight will last for 15h and 7min.

Frequently asked questions

What is the weather forecast for Mertztown for tomorrow?
On Thursday, in Mertztown, thunderstorms are expected in the afternoon.
Will it rain tomorrow?
With a probability of 76%, light precipitation of 0.28" is anticipated.
What will be the highest temperature tomorrow?
Tomorrow, the maximum temperature will be 87.8°F, while the minimum temperature will be 60.8°F. The maximum heat index, which indicates how humid air affects the felt temperature, is evaluated at 100.4°F.
The highest temperature will be notably higher than the average maximum of 77.5°F in June. The lowest temperature will be in line with the average low of 58.3°F.
When are sunrise and sunset tomorrow in Mertztown?
On Thursday, in Mertztown, sunrise will be at 5:30 am and sunset at 8:37 pm (EDT).
How many hours of daylight will Mertztown have tomorrow?
In Mertztown, Pennsylvania, tomorrow, there will be 15h and 7min of daylight.

Hourly weather forecast

12 am
  • 72°F
  • Feels like:
    75°F
Partly Cloudy
Partly Cloudy
  • Wind: 2mph SW
  • Pressure: 29.85"Hg
  • Humidity: 95%
  • Precip. probability: 9%
  • Precipitation: 0"
  • Visibility: 5mi
2 am
  • 72°F
  • Feels like:
    73°F
Partly Cloudy
Partly Cloudy
  • Wind: 3mph SW
  • Pressure: 29.83"Hg
  • Humidity: 97%
  • Precip. probability: 9%
  • Precipitation: 0"
  • Visibility: 6mi
4 am
  • 70°F
  • Feels like:
    73°F
Partly Cloudy
Partly Cloudy
  • Wind: 3mph SW
  • Pressure: 29.83"Hg
  • Humidity: 97%
  • Precip. probability: 9%
  • Precipitation: 0"
  • Visibility: 6mi
Sunrise: 5:30 am
6 am
  • 70°F
  • Feels like:
    73°F
Partly Cloudy
Partly Cloudy
  • Wind: 2mph SSW
  • Pressure: 29.83"Hg
  • Humidity: 97%
  • Precip. probability: 9%
  • Precipitation: 0"
  • Visibility: 5mi
8 am
  • 75°F
  • Feels like:
    79°F
Partly Cloudy
Partly Cloudy
  • Wind: 4mph SW
  • Pressure: 29.83"Hg
  • Humidity: 91%
  • Precip. probability: 10%
  • Precipitation: 0"
  • Visibility: 10mi
10 am
  • 81°F
  • Feels like:
    86°F
Mostly Sunny
Mostly Sunny
  • Wind: 7mph SW
  • Pressure: 29.8"Hg
  • Humidity: 75%
  • Precip. probability: 10%
  • Precipitation: 0"
  • Visibility: 10mi
12 pm
  • 84°F
  • Feels like:
    91°F
Partly Cloudy
Partly Cloudy
  • Wind: 11mph SW
  • Pressure: 29.77"Hg
  • Humidity: 66%
  • Precip. probability: 6%
  • Precipitation: 0"
  • Visibility: 10mi
2 pm
  • 88°F
  • Feels like:
    93°F
Scattered Thunderstorms
Scattered Thunderstorms
  • Wind: 13mph SW
  • Pressure: 29.74"Hg
  • Humidity: 60%
  • Precip. probability: 35%
  • Precipitation: 0.04"
  • Visibility: 7mi
4 pm
  • 86°F
  • Feels like:
    91°F
Thunderstorms
Thunderstorms
  • Wind: 9mph WSW
  • Pressure: 29.71"Hg
  • Humidity: 63%
  • Precip. probability: 76%
  • Precipitation: 0.12"
  • Visibility: 6mi
6 pm
  • 81°F
  • Feels like:
    84°F
Cloudy
Cloudy
  • Wind: 9mph WSW
  • Pressure: 29.74"Hg
  • Humidity: 69%
  • Precip. probability: 22%
  • Precipitation: 0"
  • Visibility: 8mi
8 pm
  • 77°F
  • Feels like:
    81°F
Cloudy
Cloudy
  • Wind: 8mph WSW
  • Pressure: 29.77"Hg
  • Humidity: 70%
  • Precip. probability: 6%
  • Precipitation: 0"
  • Visibility: 10mi
Sunset: 8:37 pm
10 pm
  • 72°F
  • Feels like:
    73°F
Mostly Cloudy
Mostly Cloudy
  • Wind: 7mph W
  • Pressure: 29.8"Hg
  • Humidity: 75%
  • Precip. probability: 6%
  • Precipitation: 0"
  • Visibility: 10mi
Tomorrow, on Thursday, weather will be unstable, and a combination of primarily cloudy and occasionally turbulent, rain-soaked and bright weather is anticipated.
Rain is anticipated from 2 pm to 5 pm. The most intense rain will be falling at 3 pm and 4 pm.
The temperature will be between the lowest temperature of 69.8°F and the highest temperature of 87.8°F. The hottest part of the day is anticipated around 2 pm.
The maximum is expected to resemble July's average high of 83.8°F rather than June's. The lowest temperature is consistent with June's typical minimum of 58.3°F.
Updated: Jun 18, 2025 @ 10:49:02 UTC
Published by: Weather U.S. | About Us
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