Weather forecast for tomorrow
Collinsville, IL

Weather forecast for tomorrow

Thursday, May 15.

Partly Cloudy
5:45 am

8:06 pm
CDT
Partly Cloudy
90°F / 61°F
  • Wind: 15mph SSW
  • Humidity: 68%
  • Precip. probability: 17%
  • Precipitation: 0"
  • UV index: 7
Tomorrow, in Collinsville, expect partly sunny skies with periods of cloudiness.
Temperature is expected to hit a high of a tropical 89.6°F during the day, dipping to a low of a breezy 60.8°F at night.
The maximum heat index, which calculates the temperature value influenced by the moisture in the air, is calculated to be a scorching 104°F. Take into consideration that the heat index values are calculated for shade and light wind conditions. Bear in mind that direct sunshine exposure increases weather impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees.
The forecast high is higher and more aligned with what is typical in June than in May.
Sunrise will be at 5:45 am and sunset at 8:06 pm; tomorrow's daylight will last for 14h and 21min.

Frequently asked questions

What is the weather forecast for Collinsville for tomorrow?
Tomorrow, a pleasant mix of sun and clouds will define the day.
What will be the maximum temperature tomorrow?
Tomorrow, the highest temperature will be 89.6°F, while the lowest temperature will be 60.8°F. The maximum heat index, which combines relative humidity and air temperature, is estimated at 104°F.
The maximum temperature will be notably higher than the average highest temperature of 74.5°F in May. The lowest temperature will be in line with the average low of 57.6°F.
What time are sunrise and sunset tomorrow?
On Thursday, in Collinsville, sunrise will be at 5:45 am and sunset at 8:06 pm (CDT).
How many hours of daylight will Collinsville have tomorrow?
In Collinsville, the length of the day tomorrow will be 14h and 21min.

Hourly weather forecast

12 am
  • 73°F
  • Feels like:
    73°F
Mostly Cloudy
Mostly Cloudy
  • Wind: 6mph SSE
  • Pressure: 29.59"Hg
  • Humidity: 87%
  • Precip. probability: 10%
  • Precipitation: 0"
  • Visibility: 10mi
2 am
  • 72°F
  • Feels like:
    75°F
Cloudy
Cloudy
  • Wind: 6mph SSE
  • Pressure: 29.56"Hg
  • Humidity: 88%
  • Precip. probability: 22%
  • Precipitation: 0"
  • Visibility: 10mi
4 am
  • 72°F
  • Feels like:
    73°F
Partly Cloudy
Partly Cloudy
  • Wind: 7mph SSE
  • Pressure: 29.53"Hg
  • Humidity: 88%
  • Precip. probability: 9%
  • Precipitation: 0"
  • Visibility: 10mi
Sunrise: 5:45 am
6 am
  • 70°F
  • Feels like:
    73°F
Partly Cloudy
Partly Cloudy
  • Wind: 6mph SSE
  • Pressure: 29.53"Hg
  • Humidity: 92%
  • Precip. probability: 10%
  • Precipitation: 0"
  • Visibility: 10mi
8 am
  • 73°F
  • Feels like:
    77°F
Partly Cloudy
Partly Cloudy
  • Wind: 9mph SSE
  • Pressure: 29.53"Hg
  • Humidity: 88%
  • Precip. probability: 7%
  • Precipitation: 0"
  • Visibility: 10mi
10 am
  • 81°F
  • Feels like:
    84°F
Mostly Cloudy
Mostly Cloudy
  • Wind: 12mph S
  • Pressure: 29.53"Hg
  • Humidity: 76%
  • Precip. probability: 4%
  • Precipitation: 0"
  • Visibility: 10mi
12 pm
  • 84°F
  • Feels like:
    90°F
Mostly Cloudy
Mostly Cloudy
  • Wind: 13mph S
  • Pressure: 29.53"Hg
  • Humidity: 67%
  • Precip. probability: 2%
  • Precipitation: 0"
  • Visibility: 10mi
2 pm
  • 88°F
  • Feels like:
    95°F
Mostly Cloudy
Mostly Cloudy
  • Wind: 14mph SSW
  • Pressure: 29.53"Hg
  • Humidity: 59%
  • Precip. probability: 2%
  • Precipitation: 0"
  • Visibility: 10mi
4 pm
  • 88°F
  • Feels like:
    93°F
Cloudy
Cloudy
  • Wind: 14mph SW
  • Pressure: 29.53"Hg
  • Humidity: 53%
  • Precip. probability: 6%
  • Precipitation: 0"
  • Visibility: 10mi
6 pm
  • 84°F
  • Feels like:
    88°F
Mostly Cloudy
Mostly Cloudy
  • Wind: 12mph SSW
  • Pressure: 29.56"Hg
  • Humidity: 55%
  • Precip. probability: 12%
  • Precipitation: 0"
  • Visibility: 10mi
8 pm
  • 79°F
  • Feels like:
    82°F
Partly Cloudy
Partly Cloudy
  • Wind: 8mph SW
  • Pressure: 29.59"Hg
  • Humidity: 63%
  • Precip. probability: 21%
  • Precipitation: 0"
  • Visibility: 10mi
Sunset: 8:06 pm
10 pm
  • 73°F
  • Feels like:
    75°F
Partly Cloudy
Partly Cloudy
  • Wind: 7mph WSW
  • Pressure: 29.65"Hg
  • Humidity: 69%
  • Precip. probability: 7%
  • Precipitation: 0"
  • Visibility: 10mi
Tomorrow, primarily gloomy and occasionally dry and sunny weather is expected.
The temperature will be between a minimum of 69.8°F and a maximum of 87.8°F. The feels-like temperature will vary between the lowest temperature of 71.6°F and the highest temperature of 95°F. The hottest part of the day will be from 2 pm to 4 pm.
The maximum temperature will be more alike with June's average high of 83.3°F than May's 74.5°F. The minimum temperature will be similar to May's average low of 57.6°F.
Updated: May 14, 2025 @ 22:51:52 UTC
Published by: Weather Atlas | About Us
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