Hourly Weather Forecast - Mount Vernon, IA

12 AM
19°F
0%
1mph
SSE
Partly Cloudy
Humidity
75%
Feels like
19°F
Dew Point
13°F
1 AM
18°F
0%
2mph
SE
Partly Cloudy
Humidity
77%
Feels like
18°F
Dew Point
12°F
2 AM
18°F
10%
2mph
SE
Partly Cloudy
Humidity
78%
Feels like
18°F
Dew Point
12°F
3 AM
18°F
10%
3mph
SSE
Partly Cloudy
Humidity
80%
Feels like
13°F
Dew Point
13°F
4 AM
18°F
10%
3mph
SSE
Partly Cloudy
Humidity
81%
Feels like
13°F
Dew Point
13°F
5 AM
18°F
10%
4mph
S
Partly Cloudy
Humidity
83%
Feels like
12°F
Dew Point
13°F
6 AM
18°F
10%
5mph
S
Partly Cloudy
Humidity
85%
Feels like
11°F
Dew Point
14°F
7 AM
19°F
10%
5mph
S
Partly Cloudy
Humidity
86%
Feels like
11°F
Dew Point
15°F
7:27 AM
8 AM
20°F
10%
6mph
S
Partly Cloudy
Humidity
86%
Feels like
12°F
Dew Point
17°F
9 AM
22°F
10%
6mph
S
Partly Cloudy
Humidity
86%
Feels like
14°F
Dew Point
19°F
10 AM
24°F
10%
8mph
SSW
Partly Cloudy
Humidity
85%
Feels like
16°F
Dew Point
21°F
11 AM
28°F
10%
9mph
SSW
Partly Cloudy
Humidity
81%
Feels like
19°F
Dew Point
23°F
12 PM
30°F
10%
10mph
SSW
Mostly Sunny
Humidity
80%
Feels like
22°F
Dew Point
25°F
1 PM
32°F
10%
10mph
SSW
Partly Cloudy
Humidity
81%
Feels like
23°F
Dew Point
27°F
2 PM
33°F
10%
10mph
SSW
Mostly Sunny
Humidity
83%
Feels like
24°F
Dew Point
28°F
3 PM
33°F
10%
10mph
SSW
Partly Cloudy
Humidity
85%
Feels like
25°F
Dew Point
29°F
4 PM
33°F
10%
9mph
SW
Partly Cloudy
Humidity
86%
Feels like
25°F
Dew Point
29°F
4:35 PM
5 PM
33°F
10%
9mph
SW
Mostly Cloudy
Humidity
88%
Feels like
26°F
Dew Point
30°F
6 PM
33°F
10%
9mph
SW
Cloudy
Humidity
88%
Feels like
26°F
Dew Point
30°F
7 PM
33°F
10%
9mph
WSW
Cloudy
Humidity
88%
Feels like
26°F
Dew Point
30°F
8 PM
33°F
10%
8mph
WSW
Mostly Cloudy
Humidity
87%
Feels like
27°F
Dew Point
30°F
9 PM
33°F
10%
8mph
WSW
Mostly Cloudy
Humidity
87%
Feels like
27°F
Dew Point
30°F
10 PM
33°F
10%
7mph
W
Mostly Cloudy
Humidity
86%
Feels like
27°F
Dew Point
29°F
11 PM
33°F
10%
7mph
WNW
Cloudy
Humidity
86%
Feels like
27°F
Dew Point
29°F

Rainfall Totals Through Wednesday A.M.

Heavy Rain Returns to Deluge Pacific Northwest

Another atmospheric river will hit the Pacific Northwest with heavy rain and high winds.

Monday's Weather Outlook

Today's Weather Outlook

How to Measure Snow via NWS

How To Measure Snow

Weekly Drought Map for December 11, 2025

Hit-or-Miss Precipitation Leads to Mixed Drought Results

A person standing in a snowy forest with their back to the camera. They are bundled up in a white hat and a brown jacket. (Image by StockSnap from Pixabay)

Common Cold Weather Illnesses

A strong cold-air-damming event from March 20, 2018.

Cold Air Damming - Cause And Effects

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