Hourly Weather Forecast - Johnston, IA

12 AM
32°F
0%
11mph
S
Mostly Cloudy
Humidity
62%
Feels like
23°F
Dew Point
20°F
1 AM
33°F
0%
11mph
SSW
Partly Cloudy
Humidity
60%
Feels like
25°F
Dew Point
21°F
2 AM
35°F
0%
11mph
SSW
Mostly Clear
Humidity
58%
Feels like
27°F
Dew Point
22°F
3 AM
36°F
0%
11mph
SSW
Mostly Clear
Humidity
57%
Feels like
29°F
Dew Point
22°F
4 AM
37°F
0%
10mph
SSW
Mostly Clear
Humidity
57%
Feels like
30°F
Dew Point
23°F
5 AM
36°F
10%
9mph
SW
Mostly Clear
Humidity
60%
Feels like
29°F
Dew Point
24°F
6 AM
36°F
10%
8mph
SW
Mostly Clear
Humidity
64%
Feels like
29°F
Dew Point
25°F
7 AM
35°F
10%
8mph
SW
Partly Cloudy
Humidity
67%
Feels like
29°F
Dew Point
25°F
7:37 AM
8 AM
36°F
10%
7mph
WSW
Partly Cloudy
Humidity
69%
Feels like
30°F
Dew Point
27°F
9 AM
38°F
10%
7mph
WSW
Mostly Cloudy
Humidity
68%
Feels like
32°F
Dew Point
28°F
10 AM
39°F
10%
8mph
W
Mostly Cloudy
Humidity
67%
Feels like
34°F
Dew Point
29°F
11 AM
41°F
10%
8mph
WNW
Cloudy
Humidity
66%
Feels like
36°F
Dew Point
31°F
12 PM
42°F
10%
8mph
NW
Cloudy
Humidity
65%
Feels like
37°F
Dew Point
31°F
1 PM
42°F
10%
8mph
NW
Cloudy
Humidity
65%
Feels like
37°F
Dew Point
31°F
2 PM
41°F
10%
9mph
NW
Cloudy
Humidity
67%
Feels like
36°F
Dew Point
31°F
3 PM
39°F
10%
8mph
NNW
Cloudy
Humidity
70%
Feels like
33°F
Dew Point
30°F
4 PM
37°F
10%
8mph
NNW
Mostly Cloudy
Humidity
72%
Feels like
30°F
Dew Point
28°F
4:47 PM
5 PM
34°F
10%
8mph
NNW
Mostly Cloudy
Humidity
76%
Feels like
27°F
Dew Point
27°F
6 PM
32°F
10%
8mph
NNW
Mostly Cloudy
Humidity
80%
Feels like
25°F
Dew Point
27°F
7 PM
31°F
10%
8mph
NNW
Mostly Cloudy
Humidity
87%
Feels like
23°F
Dew Point
28°F
8 PM
30°F
10%
8mph
NNW
Mostly Cloudy
Humidity
87%
Feels like
23°F
Dew Point
27°F
9 PM
29°F
10%
7mph
NNW
Partly Cloudy
Humidity
88%
Feels like
22°F
Dew Point
26°F
10 PM
28°F
10%
6mph
NNW
Partly Cloudy
Humidity
87%
Feels like
22°F
Dew Point
25°F
11 PM
28°F
10%
6mph
NNW
Partly Cloudy
Humidity
86%
Feels like
21°F
Dew Point
24°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

loading ad...

Today's National Outlook

Hurricane Tracker

Allergy Forecast

Snow & Ski Forecast

Traffic Cameras

Weather Cameras

Traffic Cameras

Weather Cameras

Outdoor Sports Guide