Live Weather & Forecast

Weather in Mount Vernon

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

Flag of United States
Overcast
18°C
Feels like 18°C
64°F / Feels 64°F
Overcast
Mount Vernon, Iowa
🌞 Daytime
Updated: 2026-04-15 15:00
💧
Humidity
90%
💨
Wind
21.6 km/h SW
🌬️
Wind Gust
30.4 km/h
🌡️
Pressure
1007 mb
👁️
Visibility
16 km
☀️
UV Index
2.6 (Low)
🌧️
Precipitation
0.01 mm
☁️
Cloud Cover
100%
💦
Dew Point
16.9°C
🌐
Wind Degree
217°

Air Quality Index

US EPA: Good UK DEFRA: Low (1)
CO
166.9 μg/m³
NO₂
4.9 μg/m³
O₃
69 μg/m³
SO₂
1.2 μg/m³
PM 2.5
4.1 μg/m³
PM 10
5 μg/m³

Weather Alerts 5

Met · Severe · Future
Flood Watch issued April 15 at 2:50AM CDT until April 16 at 12:00AM CDT by NWS Quad Cities IA IL

* WHAT...Flash flooding caused by excessive rainfall is possible. * WHERE...Portions of northwest Illinois, including the following counties, Carroll, Jo Daviess and Stephenson and Iowa, including the following counties, Benton, Buchanan, Delaware, Dubuque, Jackson, Jones and Linn. * WHEN...Through this evening. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and...

You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.

Met · Severe · Future
Flood Watch issued April 15 at 12:38PM CDT until April 16 at 12:00AM CDT by NWS Quad Cities IA IL

* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of northwest Illinois, including the following counties, Carroll, Jo Daviess and Stephenson and Iowa, including the following counties, Benton, Buchanan, Delaware, Dubuque, Jackson, Jones and Linn. * WHEN...Until midnight CDT tonight. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks,...

You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.

Met · Severe · Expected
Flood Warning issued April 15 at 9:02AM CDT until April 17 at 11:00PM CDT by NWS Quad Cities IA IL

...The National Weather Service in Quad Cities IA IL has issued a Flood Warning for the following rivers in Iowa... Iowa River at Marengo affecting Benton and Iowa Counties. * WHAT...Minor flooding is forecast. * WHERE...Iowa River at Marengo. * WHEN...From Thursday afternoon to late Friday evening. * IMPACTS...At 15.0 feet, Water reaches the bottom of the levee surrounding Marengo. Water aff...

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Additional information is available at www.weather.gov/quadcities. The next statement will be issued by Thursday morning at 915 AM CDT.

Met · Severe · Immediate
Flood Warning issued April 14 at 8:49PM CDT until April 16 at 3:00PM CDT by NWS Quad Cities IA IL

...The Flood Warning continues for the following rivers in Iowa... Wapsipinicon River near De Witt 4S affecting Clinton and Scott Counties. * WHAT...Moderate flooding is occurring and moderate flooding is forecast. * WHERE...Wapsipinicon River near De Witt 4S. * WHEN...Until Thursday afternoon. * IMPACTS...At 12.5 feet, water affects old U.S. Highway 61 near the river. * ADDITIONAL DETAILS.....

Motorists should not attempt to drive around barricades or drive cars through flooded areas. Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Caution is urged when walking near riverbanks. The next statement will be issued by Wednesday evening at 90...

Met · Severe · Immediate
Flood Warning issued April 15 at 9:51AM CDT by NWS Quad Cities IA IL

...The Flood Warning is extended for the following rivers in Iowa... Wapsipinicon River near De Witt 4S affecting Clinton and Scott Counties. * WHAT...Moderate flooding is occurring and moderate flooding is forecast. This approaches the flood of record. * WHERE...Wapsipinicon River near De Witt 4S. * WHEN...Until further notice. * IMPACTS...At 12.0 feet, Overbank flooding occurs. Water affect...

Motorists should not attempt to drive around barricades or drive cars through flooded areas. Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Caution is urged when walking near riverbanks. The next statement will be issued by Thursday morning at 100...

Today's Hourly Forecast

24-hour breakdown for Mount Vernon, Iowa

12 AM
Partly Cloudy
21°
Partly Cloudy
💧 68% 💨 22.3 km/h
1 AM
Moderate rain
20°
Moderate rain
💧 86% 💨 30.6 km/h 🌧️ 100%
2 AM
Patchy rain nearby
20°
Patchy rain nearby
💧 89% 💨 27.4 km/h 🌧️ 100%
3 AM
Patchy rain nearby
19°
Patchy rain nearby
💧 90% 💨 29.5 km/h 🌧️ 100%
4 AM
Patchy rain nearby
19°
Patchy rain nearby
💧 93% 💨 8.3 km/h 🌧️ 100%
5 AM
Patchy light drizzle
18°
Patchy light drizzle
💧 95% 💨 8.6 km/h 🌧️ 100%
6 AM
Moderate rain at times
17°
Moderate rain at times
💧 90% 💨 6.1 km/h 🌧️ 100%
7 AM
Patchy rain nearby
17°
Patchy rain nearby
💧 92% 💨 11.2 km/h 🌧️ 100%
8 AM
Patchy rain nearby
17°
Patchy rain nearby
💧 93% 💨 15.5 km/h 🌧️ 86%
9 AM
Sunny
18°
Sunny
💧 91% 💨 18.4 km/h
10 AM
Partly Cloudy
19°
Partly Cloudy
💧 91% 💨 23 km/h
11 AM
Cloudy
19°
Cloudy
💧 89% 💨 24.8 km/h
12 PM
Light drizzle
19°
Light drizzle
💧 89% 💨 23 km/h 🌧️ 100%
1 PM
Overcast
20°
Overcast
💧 86% 💨 25.6 km/h
2 PM
Patchy rain nearby
20°
Patchy rain nearby
💧 85% 💨 24.1 km/h 🌧️ 75%
3 PM
Overcast
18°
Overcast
💧 90% 💨 21.6 km/h 🌧️ 69%
4 PM
Light drizzle
20°
Light drizzle
💧 91% 💨 20.5 km/h 🌧️ 100%
5 PM
Cloudy
21°
Cloudy
💧 90% 💨 19.1 km/h
6 PM
Sunny
21°
Sunny
💧 86% 💨 19.8 km/h
7 PM
Sunny
20°
Sunny
💧 91% 💨 15.8 km/h
8 PM
Patchy rain nearby
19°
Patchy rain nearby
💧 93% 💨 12.2 km/h 🌧️ 66%
9 PM
Cloudy
18°
Cloudy
💧 87% 💨 10.4 km/h
10 PM
Partly Cloudy
17°
Partly Cloudy
💧 89% 💨 13 km/h
11 PM
Partly Cloudy
17°
Partly Cloudy
💧 93% 💨 13.3 km/h

3-Day Forecast

Daily overview for Mount Vernon, Iowa

Today
Heavy rain
Heavy rain
22° / 16°
🌧️ 88% chance of rain
💧 Avg. humidity: 89%
💨 Max wind: 30.6 km/h
🌧️ Total precip: 27.82 mm
☀️ UV Index: 1.2
🌅 Sunrise: 06:25 AM
🌇 Sunset: 07:47 PM
🌙 Waning Crescent
🌑 Moon: 8% lit
Thu, Apr 16
Patchy rain nearby
Patchy rain nearby
25° / 14°
🌧️ 68% chance of rain
💧 Avg. humidity: 79%
💨 Max wind: 19.1 km/h
🌧️ Total precip: 1.29 mm
☀️ UV Index: 1.7
🌅 Sunrise: 06:23 AM
🌇 Sunset: 07:48 PM
🌙 Waning Crescent
🌑 Moon: 3% lit
Fri, Apr 17
Heavy rain
Heavy rain
25° / 13°
🌧️ 89% chance of rain
💧 Avg. humidity: 82%
💨 Max wind: 37.1 km/h
🌧️ Total precip: 68.87 mm
☀️ UV Index: 1.6
🌅 Sunrise: 06:22 AM
🌇 Sunset: 07:49 PM
🌙 New Moon
🌑 Moon: 0% lit

Best Time to Visit Mount Vernon

Plan your trip to Mount Vernon, 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 Mount Vernon 🗓 View Holidays 2026

Frequently Asked Questions

What is the current weather in Mount Vernon?
Current conditions in Mount Vernon: Overcast, temperature 18°C, humidity 90%.
What is the best time to visit Mount Vernon?
The best time to visit Mount Vernon is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Mount Vernon?
Mount Vernon is located at approximately 41.9° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Mount Vernon?
The wettest period in Mount Vernon is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Mount Vernon?
For visits to Mount Vernon during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Mount Vernon in?
Mount Vernon is located in United States, in the state of Iowa.
What are the public holidays in Mount Vernon in 2026?
View the 2026 public holidays for Mount Vernon on our Holidays page.
What are the GPS coordinates used for the weather forecast in Mount Vernon?
The weather forecast for Mount Vernon uses coordinates 41.9222, -91.4171.