10-Day Weather Forecast - Saint Johns, IL

Sunny, hot with highs in the upper 90s. Southwest winds around 5 mph. Highest heat index readings heat index readings up to 106 in the afternoon.

Mostly clear. Lows in the mid 70s. Calm winds.

Sunny, hot with highs around 100. West winds around 5 mph. Highest heat index readings heat index readings up to 107 in the afternoon.

Mostly clear. Lows in the lower 70s. North winds around 5 mph in the evening, becoming light and variable.

Mostly clear. Hot. Highs in the mid 90s.

Mostly clear. Hot. Lows in the upper 60s.

Mostly clear. Hot. Highs in the mid 90s.

Mostly clear. Hot. Lows in the upper 60s.

Mostly clear. Hot. Highs in the mid 90s.

Mostly clear. Hot. Lows in the mid 70s.

Mostly clear. Hot. Highs in the upper 90s.

Mostly clear. Hot. Lows in the mid 70s.

Mostly sunny. Highs in the mid 90s.

Clear with a slight chance of rain. Chance of precipitation 25%. Low temperature around 74F. Dew point will be around 70F with an average humidity of 70%. Winds will be 4 mph from the SW.

Sunny. High temperature around 92F. Dew point will be around 69F with an average humidity of 61%. Winds will be 5 mph from the SW.

Clear. Low temperature around 70F. Dew point will be around 69F with an average humidity of 74%. Winds will be 2 mph from the SE.

Sunny. High temperature around 89F. Dew point will be around 68F with an average humidity of 66%. Winds will be 4 mph from the S.

Clear. Low temperature around 69F. Dew point will be around 67F with an average humidity of 73%. Winds will be 2 mph from the SE.