Indiana · NWS LOT office

St. John, IN weather

It is 53°F and cloudy at Lansing Municipal Airport as of Oct 28, 3:55 AM CDT. Overnight: Mostly Cloudy, low near 49°F, 2% chance of precipitation. Forecast from the National Weather Service, issued Oct 28, 3:35 AM CDT.

Updated Oct 28, 4:28 AM CDT (snapshot)

Current conditions

Temperature

53°F

Cloudy

Wind

Calm

Humidity 82% · dew point 48°F

Pressure · visibility

30.22 inHg

Visibility 10 mi

Observed at Lansing Municipal Airport (KIGQ), Oct 28, 3:55 AM CDT. Station readings can lag or be missing.

Alerts for this area

No active NWS alerts cover the St. John forecast zone right now.

Around the NWS LOT forecast area

No active alerts in zones served by the LOT office near St. John.

From the alert snapshot of Oct 28, 2026, 5:12 AM EDT. Indiana has 2 active alerts: see them all.

For official warnings, check weather.gov and your local authorities. OpenForecast repeats National Weather Service alerts and may be delayed or incomplete. Follow instructions from emergency officials.

Next 24 hours

Hourly forecast for St. John (local time)
TimeTempForecastPrecip. chanceWind
Wed 6 AM51°FMostly Sunny1% 0 mph
Wed 7 AM50°FMostly Sunny1% 0 mph
Wed 8 AM51°FMostly Sunny1%S 5 mph
Wed 9 AM57°FMostly Sunny1%S 5 mph
Wed 10 AM61°FSunny0%SSW 5 mph
Wed 11 AM66°FSunny0%SSW 10 mph
Wed 12 PM69°FSunny0%SSW 10 mph
Wed 1 PM72°FSunny0%SSW 10 mph
Wed 2 PM74°FSunny0%SSW 10 mph
Wed 3 PM74°FSunny0%SSW 10 mph
Wed 4 PM73°FSunny1%S 10 mph
Wed 5 PM71°FSunny1%S 10 mph
Wed 6 PM68°FMostly Clear1%S 5 mph
Wed 7 PM65°FMostly Clear1%S 5 mph
Wed 8 PM63°FMostly Clear1%S 5 mph
Wed 9 PM62°FMostly Clear1%S 10 mph
Wed 10 PM61°FMostly Clear1%S 10 mph
Wed 11 PM60°FMostly Clear1%S 10 mph
Thu 12 AM60°FMostly Clear1%S 10 mph
Thu 1 AM60°FMostly Clear1%S 10 mph
Thu 2 AM59°FMostly Clear1%S 10 mph
Thu 3 AM59°FPartly Cloudy2%SSW 10 mph
Thu 4 AM59°FPartly Cloudy3%SSW 10 mph
Thu 5 AM58°FPartly Cloudy4%SSW 10 mph

Hourly values come from the NWS gridded forecast for the 2.5 km grid square that covers the city's center point. Conditions elsewhere in St. John can differ.

7-day forecast

Overnight

Low 49°F

Mostly cloudy, with a low around 49. South wind around 0 mph.

Wednesday

High 74°F·Low 57°F

Sunny. High near 74, with temperatures falling to around 71 in the afternoon. South wind 0 to 10 mph, with gusts as high as 20 mph.

Wednesday Night: Partly cloudy, with a low around 57. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.

Thursday

High 72°F·Low 46°F

A chance of rain showers between 9am and 3pm. Partly sunny, with a high near 72. West wind 5 to 15 mph. Chance of precipitation is 30%.

Thursday Night: Mostly clear, with a low around 46. North wind 0 to 5 mph, with gusts as high as 10 mph.

Friday

High 65°F·Low 49°F

Mostly sunny, with a high near 65.

Friday Night: A slight chance of rain showers between 7pm and 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 49.

Saturday

High 64°F·Low 50°F

A chance of showers and thunderstorms. Mostly cloudy, with a high near 64.

Saturday Night: A slight chance of rain showers. Mostly cloudy, with a low around 50.

Sunday

High 68°F·Low 51°F

A chance of rain showers. Mostly cloudy, with a high near 68.

Sunday Night: A chance of rain showers. Mostly cloudy, with a low around 51.

Monday

High 68°F·Low 53°F

A chance of rain showers. Mostly cloudy, with a high near 68.

Monday Night: A chance of rain showers. Mostly cloudy, with a low around 53.

Tuesday

High 68°F

Rain showers likely. Mostly cloudy, with a high near 68.

Nearby cities

Larger cities in the area

Other cities in Lake County

See every city we cover in Indiana, or check all active alerts.

About this forecast

Forecast office
St. John is served by the National Weather Service LOT forecast office, forecast zone INZ001, county zone INC089.
Location used
The Census Bureau's internal point for St. John (41.4418, -87.4678), in Lake County. Population: 24,250 (2024 estimate), number 42 of the 48 Indiana cities on this site.
Radar
Nearest NWS radar: KLOT. View it on radar.weather.gov.

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Sources

  • Forecast, hourly forecast, observations and alerts: National Weather Service API, api.weather.gov/points/41.4418,-87.4678 (forecast issued Oct 28, 3:35 AM CDT).
  • Official forecast page: forecast.weather.gov.
  • City location and population: U.S. Census Bureau, Vintage 2024 population estimates and 2024 Gazetteer files.
  • Snapshot taken Oct 28, 2026. The NWS and Census Bureau do not endorse OpenForecast.

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