Weather forecast for tomorrow
Saint Peters, PA

Weather forecast for tomorrow

Thursday, Jun 19.

PM Thunderstorms
5:31 am

8:37 pm
EDT
PM Thunderstorms
88°F / 63°F
  • Wind: 12mph SW
  • Humidity: 72%
  • Precip. probability: 48%
  • Precipitation: 0.2"
  • UV index: 9
On Thursday, June 19, rumbling thunderstorms could affect the area later in the afternoon.
With a low probability, light precipitation is predicted for tomorrow. The highest anticipated temperature is a tropical 87.8°F, while the lowest temperature will be a breezy 62.6°F.
The maximum heat index, which calculates the temperature value influenced by the moisture in the air, is computed to be a torrid 100.4°F. Take into consideration that the heat index values are calculated for shade and light wind conditions. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees.
Forecast models suggest hotter conditions, with a peak that mirrors July's climate average rather than June's.
Sunrise will be at 5:31 am and sunset at 8:37 pm; tomorrow's daylight will last for 15h and 5min.

Frequently asked questions

What is the weather forecast for Saint Peters for tomorrow?
On Thursday, thunder and rain showers will move in during the afternoon.
Will it rain tomorrow?
With a probability of 48%, light precipitation of 0.2" is anticipated.
What will be the highest temperature tomorrow?
Tomorrow, the highest temperature will be 87.8°F, while the lowest temperature will be 62.6°F. The maximum heat index, which indicates how humid air affects the felt temperature, is computed to be 100.4°F.
The highest temperature will be uncommonly higher than the average maximum of 78.1°F in June. The lowest temperature will be in line with the average low of 59.4°F.
When is the sunrise / sunset tomorrow?
On Thursday, in Saint Peters, sunrise will be at 5:31 am and sunset at 8:37 pm (EDT).
How long will the day be tomorrow?
In Saint Peters, tomorrow, there will be 15h and 5min of daylight.

Hourly weather forecast

12 am
  • 73°F
  • Feels like:
    73°F
Mostly Clear
Mostly Clear
  • Wind: 2mph WSW
  • Pressure: 29.85"Hg
  • Humidity: 94%
  • Precip. probability: 3%
  • Precipitation: 0"
  • Visibility: 8mi
2 am
  • 72°F
  • Feels like:
    75°F
Clear
Clear
  • Wind: 3mph WSW
  • Pressure: 29.85"Hg
  • Humidity: 95%
  • Precip. probability: 9%
  • Precipitation: 0"
  • Visibility: 8mi
4 am
  • 72°F
  • Feels like:
    73°F
Mostly Clear
Mostly Clear
  • Wind: 3mph WSW
  • Pressure: 29.85"Hg
  • Humidity: 95%
  • Precip. probability: 9%
  • Precipitation: 0"
  • Visibility: 7mi
Sunrise: 5:31 am
6 am
  • 70°F
  • Feels like:
    73°F
Mostly Sunny
Mostly Sunny
  • Wind: 2mph SW
  • Pressure: 29.83"Hg
  • Humidity: 95%
  • Precip. probability: 9%
  • Precipitation: 0"
  • Visibility: 6mi
8 am
  • 75°F
  • Feels like:
    81°F
Mostly Sunny
Mostly Sunny
  • Wind: 3mph SW
  • Pressure: 29.83"Hg
  • Humidity: 89%
  • Precip. probability: 9%
  • Precipitation: 0"
  • Visibility: 10mi
10 am
  • 81°F
  • Feels like:
    86°F
Sunny
Sunny
  • Wind: 6mph SW
  • Pressure: 29.83"Hg
  • Humidity: 77%
  • Precip. probability: 10%
  • Precipitation: 0"
  • Visibility: 10mi
12 pm
  • 86°F
  • Feels like:
    91°F
Sunny
Sunny
  • Wind: 9mph SW
  • Pressure: 29.8"Hg
  • Humidity: 66%
  • Precip. probability: 7%
  • Precipitation: 0"
  • Visibility: 10mi
2 pm
  • 88°F
  • Feels like:
    93°F
Showers
Showers
  • Wind: 11mph SW
  • Pressure: 29.74"Hg
  • Humidity: 59%
  • Precip. probability: 39%
  • Precipitation: 0.04"
  • Visibility: 7mi
4 pm
  • 84°F
  • Feels like:
    90°F
Scattered Thunderstorms
Scattered Thunderstorms
  • Wind: 12mph SW
  • Pressure: 29.74"Hg
  • Humidity: 65%
  • Precip. probability: 37%
  • Precipitation: 0.12"
  • Visibility: 7mi
6 pm
  • 82°F
  • Feels like:
    88°F
Scattered Thunderstorms
Scattered Thunderstorms
  • Wind: 9mph SW
  • Pressure: 29.71"Hg
  • Humidity: 68%
  • Precip. probability: 37%
  • Precipitation: 0.04"
  • Visibility: 7mi
8 pm
  • 77°F
  • Feels like:
    81°F
Cloudy
Cloudy
  • Wind: 7mph SW
  • Pressure: 29.74"Hg
  • Humidity: 76%
  • Precip. probability: 24%
  • Precipitation: 0"
  • Visibility: 7mi
Sunset: 8:37 pm
10 pm
  • 73°F
  • Feels like:
    75°F
Mostly Cloudy
Mostly Cloudy
  • Wind: 7mph WSW
  • Pressure: 29.77"Hg
  • Humidity: 79%
  • Precip. probability: 14%
  • Precipitation: 0"
  • Visibility: 7mi
Tomorrow, on Thursday, weather will be unstable, and a mix of dry and sunny, overcast, lightning-active and rain-filled weather is anticipated.
Rainfall is anticipated from 2 pm to 6 pm. With light precipitation of 0.12", most rainfall is expected at 4 pm.
The temperature will be between a minimum of 69.8°F and a maximum of 87.8°F. The hottest part of the day will be around 2 pm.
The forecasted high is more consistent with July's typical maximum of 83.7°F than the usual for June. The temperature low is forecasted to be close to the usual June value of 59.4°F.
Updated: Jun 18, 2025 @ 22:17:08 UTC
Published by: Weather U.S. | About Us
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