Weather in St. Johns, Illinois
Live weather conditions. Source: Open-Meteo
Updated May 24, 2026 · 05:00 PM ET · Refreshes every hour
Weather data temporarily unavailable.
About Weather in St. Johns
St. Johns is located in Illinois (coordinates: 38.034854°N, 89.238563°W). Weather data is sourced from Open-Meteo, a free and open meteorological API using data from national weather services including NOAA.
All temperatures are displayed in Fahrenheit. Wind speed is in miles per hour.