Hourly Weather Forecast - Johnston, IA

12 AM
31°F
10%
9mph
S
Cloudy
Humidity
56%
Feels like
22°F
Dew Point
17°F
1 AM
31°F
10%
9mph
SW
Cloudy
Humidity
58%
Feels like
23°F
Dew Point
18°F
2 AM
30°F
10%
9mph
WNW
Mostly Cloudy
Humidity
60%
Feels like
22°F
Dew Point
18°F
3 AM
29°F
10%
9mph
NW
Mostly Cloudy
Humidity
62%
Feels like
20°F
Dew Point
17°F
4 AM
27°F
10%
9mph
NNW
Mostly Cloudy
Humidity
65%
Feels like
18°F
Dew Point
17°F
5 AM
25°F
30%
10mph
N
30 % Chance of Heavy Snow
Humidity
66%
Feels like
15°F
Dew Point
15°F
6 AM
22°F
30%
10mph
NNE
30 % Chance of Heavy Snow
Humidity
69%
Feels like
11°F
Dew Point
13°F
7 AM
19°F
10%
10mph
NNE
Partly Cloudy
Humidity
62%
Feels like
8°F
Dew Point
9°F
7:35 AM
8 AM
18°F
10%
10mph
N
Sunny
Humidity
65%
Feels like
6°F
Dew Point
8°F
9 AM
18°F
10%
11mph
N
Sunny
Humidity
63%
Feels like
5°F
Dew Point
7°F
10 AM
18°F
10%
11mph
N
Mostly Sunny
Humidity
59%
Feels like
5°F
Dew Point
6°F
11 AM
18°F
10%
12mph
NNE
Partly Cloudy
Humidity
56%
Feels like
5°F
Dew Point
5°F
12 PM
18°F
10%
12mph
NNE
Mostly Cloudy
Humidity
54%
Feels like
5°F
Dew Point
4°F
1 PM
18°F
10%
12mph
NNE
Mostly Cloudy
Humidity
52%
Feels like
5°F
Dew Point
4°F
2 PM
18°F
10%
12mph
NNE
Cloudy
Humidity
51%
Feels like
5°F
Dew Point
3°F
3 PM
18°F
10%
12mph
NNE
Cloudy
Humidity
49%
Feels like
5°F
Dew Point
2°F
4 PM
17°F
10%
12mph
NNE
Mostly Cloudy
Humidity
47%
Feels like
4°F
Dew Point
1°F
5 PM
16°F
10%
11mph
NNE
Partly Cloudy
Humidity
49%
Feels like
3°F
Dew Point
0°F
5:18 PM
6 PM
14°F
10%
11mph
NNE
Partly Cloudy
Humidity
53%
Feels like
1°F
Dew Point
1°F
7 PM
13°F
10%
11mph
NNE
Partly Cloudy
Humidity
55%
Feels like
-1°F
Dew Point
-1°F
8 PM
11°F
10%
11mph
NNE
Mostly Cloudy
Humidity
56%
Feels like
-3°F
Dew Point
-1°F
9 PM
11°F
10%
11mph
NNE
Mostly Cloudy
Humidity
57%
Feels like
-4°F
Dew Point
-1°F
10 PM
10°F
10%
11mph
NNE
Cloudy
Humidity
58%
Feels like
-5°F
Dew Point
-2°F

Snow Forecast through Sunday

Unrelenting Storm Track Brings Snow to Great Lakes & Northeast

A couple low pressure systems will produce additional snowfall across the Great Lakes, Upper Midwest, and Northeast this weekend into the upcoming week.

Weekend Weather Outlook

Weekend Weather Outlook

Weekly Drought Map for January 15, 2026

Active Weather Creates Mix of Improvements, Degradations to Drought Depiction

Vehicle driving in wintry conditions

Prepare Your Car for Cold Weather

(Image provided by NOAA)

Polar Vortex: What Is It?

People skating on a frozen pond on a clear day. (Image by Q K from Pixabay)

Safety Tips For Icy Surfaces

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