What is today's weather forecast for Saint Johns, IL?

Today's forecast for Saint Johns shows a low of 59 degrees Fahrenheit. Mostly cloudy, with a low around 59.

What is the 7-day weather forecast for Saint Johns, IL?

The 7-day forecast for Saint Johns shows highs from 59 to 77 degrees and lows from 36 to 59 degrees Fahrenheit. Expect precipitation on 5 days with chances of 20% or higher.

Will it rain in Saint Johns, IL this week?

Yes, rain is possible in Saint Johns this week. Precipitation chances: Monday (70% chance), Tuesday (50% chance), Wednesday (50% chance), Thursday (50% chance), Friday (50% chance).

How accurate is the Saint Johns weather forecast?

WeatherForYou provides highly accurate Saint Johns forecasts using National Weather Service data and current conditions from the nearest available weather stations, often miles closer than regional airports, for the most precise local forecasts.

Saint Johns, IL Weather Forecast and Current Conditions

Current Conditions From Nearby Station

Switch to Metric Units

64°F
Feels Like 64°F

Humidity 81% Dew Point 58°F Wind SSE 1 MPH Gusts 4 Barometer 29.89 in.759.2 mm

Report from a MADIS/MESONET weather station 12.2 miles SSE of central Saint Johns
at 12:55 AM Sat, Nov 15, 2025

Point Forecast at a Glance

FriNov 14

SatNov 15

SunNov 16

MonNov 17

30%

TueNov 18

50%

WedNov 19

50%

ThuNov 20

50%

7-Day Temperature Trend

Week Ahead Summary

Sharp cooling trend with high temperatures dropping from 77°F to 65°F, falling as low as 59°F. Unsettled weather expected with rain likely on at least 4 days.

Climate Context

This week's forecast shows temperatures running 9°F above the historical average for November. Normal highs for this period are around 55°F with lows around 35°F.

This Date in Weather History

1986 - An early season cold wave set more than 200 records from the northwestern U.S. to the east coast over a seven day period. For some places it proved to be the coldest weather of the winter season.

Saint Johns, IL 7 Day Weather Forecast Details

Friday Nov 14

Night: Mostly cloudy, with a low around 59. South southwest wind around 11 mph, with gusts as high as 20 mph.

Saturday Nov 15

Day: Mostly sunny, with a high near 77. Southwest wind 11 to 16 mph, with gusts as high as 23 mph.

Night: Mostly clear, with a low around 45. West southwest wind 6 to 8 mph becoming north northwest after midnight.

Sunday Nov 16

Day: Sunny, with a high near 60. North wind 3 to 7 mph.

Night: Mostly clear, with a low around 36. Light and variable wind.

Monday Nov 17

Day: A 30 percent chance of showers after noon. Mostly sunny, with a high near 60. Light east wind becoming east southeast 5 to 10 mph in the morning.

Night: Showers likely. Mostly cloudy, with a low around 47. East southeast wind 8 to 10 mph. Chance of precipitation is 70%.

Tuesday Nov 18

Day: A chance of showers before noon. Partly sunny, with a high near 64. Southeast wind 7 to 11 mph becoming northwest in the afternoon.

Night: A slight chance of showers after midnight. Mostly cloudy, with a low around 40. Northeast wind 3 to 6 mph.

Wednesday Nov 19

Day: A chance of showers, mainly after noon. Partly sunny, with a high near 59. East southeast wind 5 to 7 mph.

Night: A chance of showers. Mostly cloudy, with a low around 46. South southeast wind 5 to 8 mph.

Thursday Nov 20

Day: Showers likely. Mostly cloudy, with a high near 65. South southeast wind 8 to 11 mph becoming west southwest in the afternoon.

Night: Showers likely. Mostly cloudy, with a low around 46. West southwest wind 7 to 9 mph becoming south southeast after midnight.

Friday Nov 21

Day: A chance of showers. Partly sunny, with a high near 61. Southeast wind 9 to 11 mph becoming south southwest in the afternoon.

How We Provide Better Local Weather

Current conditions: We use the nearest available station to your location - including professional MESONET/MADIS and local weather stations - often miles closer than regional airports.

Forecasts: National Weather Service point forecasts predict for your specific area, not broad regional zones, making them far more relevant to your location.

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