Weather forecast for todaySaint Johns, IL

Weather forecast for today

Current condition 12:15 am CDT

  • 39°F
  • Feels like:
    39°F
Clear
Clear
  • Precipitation: 0"
  • Wind: 0mphW 280°
  • Humidity: 100%
  • Dewpoint: 39°F
  • Pressure: 30.49"Hg
  • Visibility: 9mi
  • UV index: 0
  • ▼
Currently, skies are clear and bright, offering ideal outdoor conditions.
The temperature is an icy 39.2°F. The current temperature is at the minimum anticipated for today.

Sunday Oct 18, 2026

  • 66°F
  • 39°F
Sunny
Sunny
  • Precip. probability: 5%
  • Precipitation: 0"
  • Wind: 6mphSE 140°
  • Humidity: 52%
  • UV index: 5
  • Sunrise: 7:08 am CDT
  • Sunset: 6:15 pm CDT
  • ▼
On Sunday, October 18, bright and sunny weather is expected.
The day's temperature range will span from a high of an enjoyable 66.2°F to a minimum of a cold 39.2°F.
The highest temperature for today is predicted to reflect October's average of 67.1°F.
Sunrise will be at 7:08 am and sunset at 6:15 pm; the daylight will last for 11h and 7min.

Hourly overview

Hourly temperatures

Warmest hour: 4 pm 66°C.
Coldest period: 4 am - 7 am 37°C.

Chance of precipitation

Highest chance: 7 am 3%.

Hourly weather forecast

  • 2 am
  • 39°F
  • Feels like:
    39°F
Clear
Clear
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 1mphESE 103°
  • Humidity: 100%
  • Pressure: 30.47"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 4 am
  • 37°F
  • Feels like:
    37°F
Clear
Clear
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 1mphESE 107°
  • Humidity: 90%
  • Pressure: 30.47"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 6 am
  • 37°F
  • Feels like:
    37°F
Clear
Clear
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 2mphESE 116°
  • Humidity: 92%
  • Pressure: 30.47"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Sunrise: 7:08 am
  • 8 am
  • 39°F
  • Feels like:
    39°F
Sunny
Sunny
  • Precip. probability: 5%
  • Precipitation: 0"
  • Wind: 2mphESE 122°
  • Humidity: 89%
  • Pressure: 30.5"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 10 am
  • 52°F
  • Feels like:
    52°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 5mphSE 141°
  • Humidity: 60%
  • Pressure: 30.5"Hg
  • Visibility: 10mi
  • UV index: 2
  • ▼
  • 12 pm
  • 59°F
  • Feels like:
    59°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 6mphSSE 147°
  • Humidity: 43%
  • Pressure: 30.47"Hg
  • Visibility: 10mi
  • UV index: 5
  • ▼
  • 2 pm
  • 64°F
  • Feels like:
    64°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 6mphSSE 148°
  • Humidity: 37%
  • Pressure: 30.42"Hg
  • Visibility: 10mi
  • UV index: 4
  • ▼
  • 4 pm
  • 66°F
  • Feels like:
    66°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 6mphSSE 147°
  • Humidity: 33%
  • Pressure: 30.36"Hg
  • Visibility: 10mi
  • UV index: 1
  • ▼
  • 6 pm
  • 61°F
  • Feels like:
    61°F
Sunny
Sunny
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 4mphSE 128°
  • Humidity: 42%
  • Pressure: 30.36"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Sunset: 6:15 pm
  • 8 pm
  • 52°F
  • Feels like:
    52°F
Clear
Clear
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 2mphESE 111°
  • Humidity: 66%
  • Pressure: 30.36"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 10 pm
  • 48°F
  • Feels like:
    48°F
Clear
Clear
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 2mphESE 116°
  • Humidity: 78%
  • Pressure: 30.36"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Today, in Saint Johns, mostly cloudless and sunny weather is anticipated.
The temperature will vary between a minimum of 37.4°F and a maximum of 66.2°F. The warmest part of the day is expected around 4 pm.
The maximum temperature will be consistent with the average high of 67.1°F in October. Today, expect the temperature to be more consistent with the typical minimum for November than for October.
Updated: Oct 18, 2026 @ 05:15:34 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

Currently (12:15 am CDT) it is 39.2°F in Saint Johns.

Today, sunshine and minimal clouds are in the outlook.

Today, the highest temperature will be 66.2°F, while the lowest temperature will be 39.2°F.
The maximum temperature today will be in line with the average highest temperature in October. Today, the lowest temperature will be uncommonly lower than the average low of 49.3°F.

On Sunday, in Saint Johns, sunrise will be at 7:08 am and sunset at 6:15 pm (CDT).

Today, the daylight will last for 11h and 7min.