Hourly Weather Forecast - Johnston, IA

12 AM
14°F
0%
12mph
NW
Clear
Humidity
59%
Feels like
1°F
Dew Point
2°F
1 AM
14°F
0%
10mph
NW
Clear
Humidity
58%
Feels like
1°F
Dew Point
2°F
2 AM
13°F
0%
9mph
NW
Clear
Humidity
57%
Feels like
1°F
Dew Point
1°F
3 AM
13°F
0%
8mph
NW
Clear
Humidity
56%
Feels like
2°F
Dew Point
1°F
4 AM
13°F
0%
6mph
NW
Clear
Humidity
56%
Feels like
3°F
Dew Point
0°F
5 AM
13°F
0%
6mph
NW
Clear
Humidity
55%
Feels like
4°F
Dew Point
0°F
6 AM
12°F
0%
5mph
NNW
Clear
Humidity
56%
Feels like
4°F
Dew Point
0°F
7 AM
13°F
0%
5mph
N
Partly Cloudy
Humidity
55%
Feels like
5°F
Dew Point
0°F
7:37 AM
8 AM
15°F
0%
5mph
SE
Partly Cloudy
Humidity
55%
Feels like
7°F
Dew Point
1°F
9 AM
17°F
0%
5mph
SE
Mostly Cloudy
Humidity
53%
Feels like
8°F
Dew Point
2°F
10 AM
19°F
0%
6mph
SE
Mostly Cloudy
Humidity
50%
Feels like
10°F
Dew Point
4°F
11 AM
21°F
0%
8mph
SSE
Mostly Cloudy
Humidity
48%
Feels like
12°F
Dew Point
5°F
12 PM
24°F
0%
9mph
SSE
Partly Cloudy
Humidity
46%
Feels like
14°F
Dew Point
6°F
1 PM
26°F
0%
11mph
SSE
Partly Cloudy
Humidity
43%
Feels like
16°F
Dew Point
7°F
2 PM
28°F
0%
11mph
SSE
Partly Cloudy
Humidity
42%
Feels like
18°F
Dew Point
8°F
3 PM
29°F
0%
12mph
SSE
Mostly Sunny
Humidity
42%
Feels like
19°F
Dew Point
9°F
4 PM
29°F
0%
12mph
SSE
Partly Cloudy
Humidity
43%
Feels like
20°F
Dew Point
10°F
4:46 PM
5 PM
29°F
0%
11mph
SSE
Mostly Cloudy
Humidity
45%
Feels like
19°F
Dew Point
10°F
6 PM
29°F
0%
11mph
SSE
Cloudy
Humidity
45%
Feels like
19°F
Dew Point
10°F
7 PM
29°F
0%
11mph
SSE
Cloudy
Humidity
50%
Feels like
19°F
Dew Point
13°F
8 PM
29°F
0%
11mph
S
Cloudy
Humidity
55%
Feels like
20°F
Dew Point
15°F
9 PM
30°F
0%
11mph
S
Cloudy
Humidity
59%
Feels like
21°F
Dew Point
18°F
10 PM
31°F
0%
11mph
S
Cloudy
Humidity
61%
Feels like
22°F
Dew Point
19°F
11 PM
31°F
0%
11mph
S
Mostly Cloudy
Humidity
61%
Feels like
22°F
Dew Point
20°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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