Hourly Weather Forecast - Johnston, IA

12 AM
27°F
10%
5mph
NNW
Partly Cloudy
Humidity
84%
Feels like
21°F
Dew Point
23°F
1 AM
27°F
10%
5mph
NNW
Mostly Cloudy
Humidity
81%
Feels like
21°F
Dew Point
22°F
2 AM
27°F
10%
5mph
NNW
Mostly Cloudy
Humidity
78%
Feels like
21°F
Dew Point
21°F
3 AM
27°F
10%
5mph
N
Mostly Cloudy
Humidity
74%
Feels like
21°F
Dew Point
20°F
4 AM
27°F
10%
5mph
N
Mostly Cloudy
Humidity
72%
Feels like
21°F
Dew Point
19°F
5 AM
26°F
10%
4mph
N
Partly Cloudy
Humidity
74%
Feels like
20°F
Dew Point
19°F
6 AM
24°F
10%
5mph
N
Partly Cloudy
Humidity
77%
Feels like
19°F
Dew Point
18°F
7 AM
24°F
10%
4mph
N
Partly Cloudy
Humidity
78%
Feels like
18°F
Dew Point
18°F
7:38 AM
8 AM
25°F
10%
4mph
N
Mostly Cloudy
Humidity
77%
Feels like
19°F
Dew Point
19°F
9 AM
26°F
10%
4mph
NNE
Cloudy
Humidity
73%
Feels like
21°F
Dew Point
19°F
10 AM
28°F
10%
5mph
N
Cloudy
Humidity
67%
Feels like
23°F
Dew Point
19°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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