Weather forecast for tomorrow
Union, IL

Weather forecast for tomorrow

Tuesday, Jun 17.

PM Thunderstorms
5:15 am

8:34 pm
CDT
PM Thunderstorms
86°F / 64°F
  • Wind: 10mph WSW
  • Humidity: 69%
  • Precip. probability: 64%
  • Precipitation: 0.67"
  • UV index: 7
Tomorrow, rumbles of thunder are possible along with moderate rain in the afternoon.
With a high probability, moderate precipitation is anticipated. Temperature span will be from a high of a hot 86°F to a low of a comfortable 64.4°F.
The maximum heat index, which reflects the perceived temperature due to humidity levels, is computed to be a sizzling 95°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.
It will feel hotter, with a temperature more typical of July's average maximum of 79.7°F.
Sunrise will be at 5:15 am and sunset at 8:34 pm; tomorrow's daylight will last for 15h and 19min.

Frequently asked questions

What is the weather forecast for Union for tomorrow?
Tomorrow, rainy weather and thunderstorms are expected in the afternoon.
Will it rain tomorrow?
Moderate precipitation of 0.67" is forecasted in Union, Illinois. The chance of rainfall is 64%.
What will be the highest temperature tomorrow?
Tomorrow, the highest temperature will be 86°F, while the lowest temperature will be 64.4°F. The maximum heat index, which calculates the temperature value influenced by the moisture in the air, is computed to be 95°F.
The maximum temperature will be significantly higher than the average highest temperature of 76.5°F in June. The lowest temperature will be a few degrees higher than the average low of 59°F.
When are sunrise and sunset tomorrow?
On Tuesday, in Union, sunrise will be at 5:15 am and sunset at 8:34 pm (CDT).
How long will the day be tomorrow?
Tomorrow, the daylight will last for 15h and 19min.

Hourly weather forecast

12 am
  • 72°F
  • Feels like:
    72°F
Partly Cloudy
Partly Cloudy
  • Wind: 5mph S
  • Pressure: 29.83"Hg
  • Humidity: 74%
  • Precip. probability: 2%
  • Precipitation: 0"
  • Visibility: 10mi
2 am
  • 68°F
  • Feels like:
    68°F
Partly Cloudy
Partly Cloudy
  • Wind: 5mph SSW
  • Pressure: 29.83"Hg
  • Humidity: 86%
  • Precip. probability: 3%
  • Precipitation: 0"
  • Visibility: 10mi
4 am
  • 68°F
  • Feels like:
    68°F
Partly Cloudy
Partly Cloudy
  • Wind: 6mph SSW
  • Pressure: 29.8"Hg
  • Humidity: 90%
  • Precip. probability: 6%
  • Precipitation: 0"
  • Visibility: 10mi
Sunrise: 5:15 am
6 am
  • 68°F
  • Feels like:
    70°F
Partly Cloudy
Partly Cloudy
  • Wind: 6mph SW
  • Pressure: 29.77"Hg
  • Humidity: 93%
  • Precip. probability: 12%
  • Precipitation: 0"
  • Visibility: 10mi
8 am
  • 73°F
  • Feels like:
    75°F
Partly Cloudy
Partly Cloudy
  • Wind: 7mph SW
  • Pressure: 29.77"Hg
  • Humidity: 87%
  • Precip. probability: 13%
  • Precipitation: 0"
  • Visibility: 10mi
10 am
  • 79°F
  • Feels like:
    82°F
Partly Cloudy
Partly Cloudy
  • Wind: 9mph WSW
  • Pressure: 29.77"Hg
  • Humidity: 72%
  • Precip. probability: 12%
  • Precipitation: 0"
  • Visibility: 10mi
12 pm
  • 84°F
  • Feels like:
    88°F
Mostly Cloudy
Mostly Cloudy
  • Wind: 9mph WSW
  • Pressure: 29.77"Hg
  • Humidity: 61%
  • Precip. probability: 18%
  • Precipitation: 0"
  • Visibility: 10mi
2 pm
  • 84°F
  • Feels like:
    90°F
Few Showers
Few Showers
  • Wind: 9mph WSW
  • Pressure: 29.74"Hg
  • Humidity: 61%
  • Precip. probability: 34%
  • Precipitation: 0.04"
  • Visibility: 10mi
4 pm
  • 84°F
  • Feels like:
    88°F
Scattered Thunderstorms
Scattered Thunderstorms
  • Wind: 10mph SW
  • Pressure: 29.71"Hg
  • Humidity: 62%
  • Precip. probability: 48%
  • Precipitation: 0.08"
  • Visibility: 7mi
6 pm
  • 81°F
  • Feels like:
    84°F
Thunderstorms
Thunderstorms
  • Wind: 7mph W
  • Pressure: 29.74"Hg
  • Humidity: 66%
  • Precip. probability: 64%
  • Precipitation: 0.08"
  • Visibility: 6mi
8 pm
  • 75°F
  • Feels like:
    77°F
Showers
Showers
  • Wind: 5mph WNW
  • Pressure: 29.74"Hg
  • Humidity: 76%
  • Precip. probability: 37%
  • Precipitation: 0.04"
  • Visibility: 7mi
Sunset: 8:34 pm
10 pm
  • 70°F
  • Feels like:
    72°F
Cloudy
Cloudy
  • Wind: 3mph W
  • Pressure: 29.77"Hg
  • Humidity: 90%
  • Precip. probability: 24%
  • Precipitation: 0"
  • Visibility: 7mi
Tomorrow, on Tuesday, a combination of cloudy, rain-filled and lightning-active weather is predicted.
Rain is forecasted at 7 am, and from 2 pm to 9 pm and at 11 pm. With moderate precipitation of 0.24", most rainfall is expected at 3 pm.
The temperature will be between a minimum of 68°F and a maximum of 84.2°F. The hottest part of the day will be from noon to 4 pm.
The forecasted high is more consistent with July's typical maximum of 79.7°F than the usual for June. The lowest temperature is expected to be moderately higher than the average minimum in June, typically 59°F.
Updated: Jun 17, 2025 @ 02:29:55 UTC
Published by: Weather U.S. | About Us
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