Live Weather & Forecast

Weather in Sullivan

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

Flag of United States
Overcast
24°C
Feels like 25°C
75°F / Feels 78°F
Overcast
Sullivan, Indiana
🌙 Nighttime
Updated: 2026-04-12 22:30
💧
Humidity
41%
💨
Wind
28.8 km/h SSW
🌬️
Wind Gust
48.7 km/h
🌡️
Pressure
1015 mb
👁️
Visibility
16 km
☀️
UV Index
0 (Low)
🌧️
Precipitation
0 mm
☁️
Cloud Cover
100%
💦
Dew Point
11.6°C
🌐
Wind Degree
191°

Air Quality Index

US EPA: Good UK DEFRA: Low (1)
CO
146.9 μg/m³
NO₂
3.1 μg/m³
O₃
106 μg/m³
SO₂
4.7 μg/m³
PM 2.5
5.4 μg/m³
PM 10
5.7 μg/m³

Weather Alerts 2

Met · Severe · Immediate
Flood Warning issued April 12 at 12:09PM EDT until April 13 at 10:00PM EDT by NWS Indianapolis IN

...The Flood Warning continues for the following rivers in Illinois and Indiana... Wabash River at Hutsonville and Riverton. .The last of lowland flooding continues along a short portion of the Wabash River in western Indiana, affecting the Hutsonville and Riverton areas. Flooding is expected to end there on Monday. The crest as of early Sunday afternoon was just downstream of Mount Carmel. Th...

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Caution is urged when walking near riverbanks. Additional information is available at www.weather.gov/ind. The next statement should be issued this evening by around 1130 PM EDT /1030 PM CDT/.

Effective: 2026-04-12T12:09:00-04:00  ·  Expires: 2026-04-12T23:30:00-04:00
Met · Severe · Immediate
Flood Warning issued April 12 at 12:09PM EDT until April 14 at 12:30AM EDT by NWS Indianapolis IN

...The Flood Warning continues for the following rivers in Illinois and Indiana... Wabash River at Hutsonville and Riverton. .The last of lowland flooding continues along a short portion of the Wabash River in western Indiana, affecting the Hutsonville and Riverton areas. Flooding is expected to end there on Monday. The crest as of early Sunday afternoon was just downstream of Mount Carmel. Th...

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Caution is urged when walking near riverbanks. Additional information is available at www.weather.gov/ind. The next statement should be issued this evening by around 1130 PM EDT /1030 PM CDT/.

Effective: 2026-04-12T12:09:00-04:00  ·  Expires: 2026-04-12T23:30:00-04:00

Today's Hourly Forecast

24-hour breakdown for Sullivan, Indiana

12 AM
Clear
16°
Clear
💧 76% 💨 13.3 km/h
1 AM
Clear
15°
Clear
💧 80% 💨 14.4 km/h
2 AM
Clear
15°
Clear
💧 84% 💨 14.4 km/h
3 AM
Clear
14°
Clear
💧 85% 💨 15.1 km/h
4 AM
Clear
14°
Clear
💧 89% 💨 14.8 km/h
5 AM
Clear
14°
Clear
💧 91% 💨 15.1 km/h
6 AM
Clear
13°
Clear
💧 91% 💨 14.8 km/h
7 AM
Clear
14°
Clear
💧 92% 💨 13 km/h
8 AM
Mist
15°
Mist
💧 94% 💨 13.7 km/h
9 AM
Sunny
17°
Sunny
💧 87% 💨 18.4 km/h
10 AM
Sunny
21°
Sunny
💧 78% 💨 20.9 km/h
11 AM
Sunny
23°
Sunny
💧 67% 💨 23 km/h
12 PM
Sunny
26°
Sunny
💧 55% 💨 25.6 km/h
1 PM
Sunny
27°
Sunny
💧 43% 💨 27.4 km/h
2 PM
Sunny
27°
Sunny
💧 39% 💨 31 km/h
3 PM
Sunny
27°
Sunny
💧 39% 💨 29.9 km/h
4 PM
Sunny
28°
Sunny
💧 38% 💨 27.7 km/h
5 PM
Sunny
28°
Sunny
💧 35% 💨 28.8 km/h
6 PM
Sunny
27°
Sunny
💧 36% 💨 29.2 km/h
7 PM
Sunny
25°
Sunny
💧 41% 💨 29.9 km/h
8 PM
Sunny
24°
Sunny
💧 43% 💨 30.6 km/h
9 PM
Clear
23°
Clear
💧 48% 💨 29.9 km/h
10 PM
Overcast
24°
Overcast
💧 41% 💨 28.8 km/h
11 PM
Clear
22°
Clear
💧 49% 💨 32.8 km/h

3-Day Forecast

Daily overview for Sullivan, Indiana

Today
Sunny
Sunny
29° / 13°
🌧️ 0% chance of rain
💧 Avg. humidity: 64%
💨 Max wind: 32.8 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.8
🌅 Sunrise: 07:17 AM
🌇 Sunset: 08:24 PM
🌙 Waning Crescent
🌑 Moon: 33% lit
Mon, Apr 13
Patchy rain nearby
Patchy rain nearby
23° / 18°
🌧️ 70% chance of rain
💧 Avg. humidity: 78%
💨 Max wind: 35.3 km/h
🌧️ Total precip: 1.8 mm
☀️ UV Index: 1
🌅 Sunrise: 07:16 AM
🌇 Sunset: 08:25 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Tue, Apr 14
Thundery outbreaks in nearby
Thundery outbreaks in nearby
27° / 18°
🌧️ 0% chance of rain
💧 Avg. humidity: 80%
💨 Max wind: 34.2 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.9
🌅 Sunrise: 07:14 AM
🌇 Sunset: 08:26 PM
🌙 Waning Crescent
🌑 Moon: 15% lit

Best Time to Visit Sullivan

Plan your trip to Sullivan, 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 Sullivan 🗓 View Holidays 2026

Frequently Asked Questions

What is the current weather in Sullivan?
Current conditions in Sullivan: Overcast, temperature 24°C, humidity 41%.
What is the best time to visit Sullivan?
The best time to visit Sullivan is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Sullivan?
Sullivan is located at approximately 39.1° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Sullivan?
The wettest period in Sullivan is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Sullivan?
For visits to Sullivan during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Sullivan in?
Sullivan is located in United States, in the state of Indiana.
What are the public holidays in Sullivan in 2026?
View the 2026 public holidays for Sullivan on our Holidays page.
What are the GPS coordinates used for the weather forecast in Sullivan?
The weather forecast for Sullivan uses coordinates 39.0953, -87.4078.