Live Weather & Forecast

Weather in St. John

Indiana, United States · Real-time conditions & 3-day outlook

Flag of United States
Light rain
20°C
Feels like 20°C
68°F / Feels 68°F
Light rain
St. John, Indiana
🌙 Nighttime
Updated: 2026-04-12 21:15
💧
Humidity
59%
💨
Wind
26.6 km/h SSW
🌬️
Wind Gust
38.9 km/h
🌡️
Pressure
1011 mb
👁️
Visibility
16 km
☀️
UV Index
0 (Low)
🌧️
Precipitation
0.01 mm
☁️
Cloud Cover
100%
💦
Dew Point
10.4°C
🌐
Wind Degree
196°

Air Quality Index

US EPA: Good UK DEFRA: Low (1)
CO
149.9 μg/m³
NO₂
3.5 μg/m³
O₃
96 μg/m³
SO₂
2.2 μg/m³
PM 2.5
6.9 μg/m³
PM 10
7.1 μg/m³

Weather Alerts 2

Met · Severe · Immediate
Flood Warning issued April 12 at 10:22AM CDT until April 14 at 1:00AM CDT by NWS Chicago IL

...The Flood Warning continues for the following rivers in Indiana... Kankakee River at Dunns Bridge affecting Porter and Jasper Counties. Kankakee River at Shelby affecting Newton and Lake IN Counties. For the Kankakee River...including Dunns Bridge...Minor flooding is occurring. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Kankakee River from Near I-65 and...

A Flood Warning means water levels above flood stage are imminent or may already be occurring. Persons along rivers and streams in the warned area should take immediate precautions to protect life and property. These forecasts are based on observed precipitation as well as forecast precipitation...

Effective: 2026-04-12T10:22:00-05:00  ·  Expires: 2026-04-13T04:30:00-05:00
Met · Severe · Immediate
Flood Warning issued April 12 at 10:22AM CDT until April 12 at 10:00PM CDT by NWS Chicago IL

...The Flood Warning continues for the following rivers in Indiana... Kankakee River at Dunns Bridge affecting Porter and Jasper Counties. Kankakee River at Shelby affecting Newton and Lake IN Counties. For the Kankakee River...including Dunns Bridge...Minor flooding is occurring. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Kankakee River from US-421 south o...

A Flood Warning means water levels above flood stage are imminent or may already be occurring. Persons along rivers and streams in the warned area should take immediate precautions to protect life and property. These forecasts are based on observed precipitation as well as forecast precipitation...

Effective: 2026-04-12T10:22:00-05:00  ·  Expires: 2026-04-12T22:00:00-05:00

Today's Hourly Forecast

24-hour breakdown for St. John, Indiana

12 AM
Clear
11°
Clear
💧 70% 💨 14.8 km/h
1 AM
Clear
11°
Clear
💧 71% 💨 17.6 km/h
2 AM
Clear
11°
Clear
💧 72% 💨 18.4 km/h
3 AM
Clear
10°
Clear
💧 74% 💨 18.4 km/h
4 AM
Clear
10°
Clear
💧 77% 💨 19.4 km/h
5 AM
Clear
10°
Clear
💧 80% 💨 20.2 km/h
6 AM
Clear
11°
Clear
💧 82% 💨 21.2 km/h
7 AM
Sunny
11°
Sunny
💧 86% 💨 22.7 km/h
8 AM
Sunny
13°
Sunny
💧 88% 💨 23.8 km/h
9 AM
Sunny
15°
Sunny
💧 85% 💨 25.2 km/h
10 AM
Sunny
19°
Sunny
💧 80% 💨 27.4 km/h
11 AM
Sunny
22°
Sunny
💧 71% 💨 29.5 km/h
12 PM
Sunny
25°
Sunny
💧 60% 💨 31.7 km/h
1 PM
Sunny
26°
Sunny
💧 45% 💨 32.8 km/h
2 PM
Partly Cloudy
27°
Partly Cloudy
💧 42% 💨 33.8 km/h
3 PM
Partly Cloudy
27°
Partly Cloudy
💧 42% 💨 32.4 km/h
4 PM
Sunny
27°
Sunny
💧 39% 💨 30.2 km/h
5 PM
Sunny
27°
Sunny
💧 39% 💨 31.7 km/h
6 PM
Sunny
28°
Sunny
💧 40% 💨 32.4 km/h
7 PM
Sunny
26°
Sunny
💧 40% 💨 32.4 km/h
8 PM
Clear
24°
Clear
💧 44% 💨 35.6 km/h
9 PM
Light rain
20°
Light rain
💧 59% 💨 26.6 km/h 🌧️ 77%
10 PM
Patchy rain nearby
22°
Patchy rain nearby
💧 51% 💨 32.4 km/h 🌧️ 100%
11 PM
Patchy rain nearby
21°
Patchy rain nearby
💧 57% 💨 36.4 km/h 🌧️ 100%

3-Day Forecast

Daily overview for St. John, Indiana

Today
Patchy rain nearby
Patchy rain nearby
28° / 10°
🌧️ 85% chance of rain
💧 Avg. humidity: 62%
💨 Max wind: 36.4 km/h
🌧️ Total precip: 0.17 mm
☀️ UV Index: 1.6
🌅 Sunrise: 06:15 AM
🌇 Sunset: 07:27 PM
🌙 Waning Crescent
🌑 Moon: 33% lit
Mon, Apr 13
Patchy rain nearby
Patchy rain nearby
24° / 17°
🌧️ 87% chance of rain
💧 Avg. humidity: 84%
💨 Max wind: 38.9 km/h
🌧️ Total precip: 4.05 mm
☀️ UV Index: 1.1
🌅 Sunrise: 06:13 AM
🌇 Sunset: 07:28 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Tue, Apr 14
Thundery outbreaks in nearby
Thundery outbreaks in nearby
25° / 19°
🌧️ 0% chance of rain
💧 Avg. humidity: 88%
💨 Max wind: 29.5 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.3
🌅 Sunrise: 06:11 AM
🌇 Sunset: 07:29 PM
🌙 Waning Crescent
🌑 Moon: 15% lit

Best Time to Visit St. John

Plan your trip to St. John, United States around the most favorable weather conditions.

Peak Season
June – September
Warm, dry summers — ideal for outdoor activities.
Shoulder Season
April – May, October
Fewer crowds, moderate prices, mild weather.
Off Season
November – March
Cooler temperatures; some regions may experience rain or snow.
← Back to St. John 🗓 View Holidays 2026

Frequently Asked Questions

What is the current weather in St. John?
Current conditions in St. John: Light rain, temperature 20°C, humidity 59%.
What is the best time to visit St. John?
The best time to visit St. John is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in St. John?
St. John is located at approximately 41.5° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in St. John?
The wettest period in St. John is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to St. John?
For visits to St. John during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is St. John in?
St. John is located in United States, in the state of Indiana.
What are the public holidays in St. John in 2026?
View the 2026 public holidays for St. John on our Holidays page.
What are the GPS coordinates used for the weather forecast in St. John?
The weather forecast for St. John uses coordinates 41.45, -87.47.