Weather forecast for todayCollinsville, IL

Weather forecast for today

Current condition 2:43 am CDT

  • 50°F
  • Feels like:
    50°F
Clear
Clear
  • Precipitation: 0"
  • Wind: 0mphW 280°
  • Humidity: 91%
  • Dewpoint: 48°F
  • Pressure: 30.34"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
In Collinsville, at the moment, the atmosphere is fresh and open, with clear skies above.
The temperature is a cool 50°F. The current temperature is far from today's maximum-anticipated 75.2°F.

Tuesday Oct 20, 2026

  • 75°F
  • 43°F
Sunny
Sunny
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 3mphESE 118°
  • Humidity: 56%
  • UV index: 4
  • Sunrise: 7:14 am CDT
  • Sunset: 6:14 pm CDT
  • ▼
On Tuesday, October 20, sunshine and minimal clouds are in the outlook.
Temperatures will see a substantial oscillation, reaching a high of a moderately hot 75.2°F and dropping to a low of a frosty 42.8°F.
The expected high of 75.2°F appears seasonally off, better matching September's typical values.
Sunrise will be at 7:14 am and sunset at 6:14 pm; the daylight will last for 11h and 1min.

Hourly overview

Hourly temperatures

Warmest hour: 3 pm 73°C.
Coldest hour: 6 am 45°C.

Chance of precipitation

Highest chance: 9 pm - 12 am 15%.

Hourly weather forecast

  • 4 am
  • 48°F
  • Feels like:
    48°F
Clear
Clear
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 0mphE 92°
  • Humidity: 94%
  • Pressure: 30.33"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 6 am
  • 45°F
  • Feels like:
    45°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 1mphE 95°
  • Humidity: 93%
  • Pressure: 30.36"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Sunrise: 7:14 am
  • 8 am
  • 46°F
  • Feels like:
    46°F
Sunny
Sunny
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 1mphE 96°
  • Humidity: 93%
  • Pressure: 30.36"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 10 am
  • 59°F
  • Feels like:
    59°F
Sunny
Sunny
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 2mphESE 117°
  • Humidity: 67%
  • Pressure: 30.36"Hg
  • Visibility: 10mi
  • UV index: 2
  • ▼
  • 12 pm
  • 68°F
  • Feels like:
    68°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 2mphSE 141°
  • Humidity: 46%
  • Pressure: 30.33"Hg
  • Visibility: 10mi
  • UV index: 4
  • ▼
  • 2 pm
  • 72°F
  • Feels like:
    72°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 3mphSE 136°
  • Humidity: 37%
  • Pressure: 30.3"Hg
  • Visibility: 10mi
  • UV index: 4
  • ▼
  • 4 pm
  • 72°F
  • Feels like:
    72°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 3mphESE 118°
  • Humidity: 35%
  • Pressure: 30.27"Hg
  • Visibility: 10mi
  • UV index: 1
  • ▼
  • 6 pm
  • 66°F
  • Feels like:
    66°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 3mphESE 102°
  • Humidity: 46%
  • Pressure: 30.24"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Sunset: 6:14 pm
  • 8 pm
  • 57°F
  • Feels like:
    57°F
Clear
Clear
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 1mphE 95°
  • Humidity: 70%
  • Pressure: 30.27"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 10 pm
  • 52°F
  • Feels like:
    52°F
Mostly Clear
Mostly Clear
  • Precip. probability: 15%
  • Precipitation: 0"
  • Wind: 1mphESE 108°
  • Humidity: 81%
  • Pressure: 30.27"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Today, in Collinsville, primarily sunny and occasionally cloudy weather is predicted.
The temperature will vary between the highest temperature of 73.4°F and the lowest temperature of 44.6°F. The warmest part of the day is expected around 3 pm.
The maximum temperature will align more closely with September's average high of 79°F than with October's 66°F. The expected low will be more comparable to what’s common in November than the current October average of 48.9°F.
Updated: Oct 20, 2026 @ 07:43:57 UTC
Published by: Weather Atlas | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

Currently (2:43 am CDT) it is 50°F in Collinsville.

Today, conditions will remain bright with clear skies.

Today, the maximum temperature in Collinsville will be 75.2°F, while the minimum temperature will be 42.8°F.
The highest temperature will be significantly higher than the average maximum of 66°F in October. The lowest temperature will be a couple of degrees lower than the average low of 48.9°F.

On Tuesday, in Collinsville, sunrise will be at 7:14 am and sunset at 6:14 pm (CDT).

Today, the daylight will last for 11h and 1min.