Walnut, IA Weather Forecast & Alerts

Current conditions, 5-day forecast, and active NWS weather alerts for Walnut, IA.

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Current Conditions — Walnut, IA

HARLAN MUNI (KHNR)

Clear

66.2 F
Humidity:73%
Wind Speed:S 18.3 G 26.4 mph
Barometer:29.77 in
Dewpoint:57.2 F
Visibility:10.00 mi
Precip:--
Heat Index:NA
Wind Chill:NA
Apr 22 2026, 08:55 PM CDT
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5-Day Forecast — Walnut, IA

Wednesday

High 80 °F
Forecast Missing
Wednesday
Night
Low 59 °F
Isolated T-storm
Thursday

High 73 °F
T-storms
Thursday
Night
Low 44 °F
T-storms Likely
Friday

High 66 °F
Mostly Sunny
Friday
Night
Low 41 °F
Mostly Clear
Saturday

High 64 °F
Isolated T-storm
Saturday
Night
Low 46 °F
Chance of Rain
Sunday

High 66 °F
T-storms Likely

Detailed Forecast — Walnut, IA

Wednesday
Slight Chance of Showers. High near 80°F. Wind around 20 mph, with gusts as high as 29 mph.
Wednesday Night
Isolated T-storm. Low around 59°F. Wind 20 to 22 mph, with gusts as high as 31 mph.
Thursday
Thunderstorms. High near 73°F. Wind 14 to 23 mph, with gusts as high as 31 mph.
Thursday Night
Thunderstorms Likely. Low around 44°F. Wind 8 to 14 mph, with gusts as high as 20 mph.
Friday
Mostly Sunny. High near 66°F. Wind 10 to 14 mph, with gusts as high as 20 mph.
Friday Night
Mostly Clear. Low around 41°F. Wind around 7 mph, with gusts as high as 13 mph.
Saturday
Isolated T-storm. High near 64°F. Wind 9 to 12 mph, with gusts as high as 17 mph.
Saturday Night
Chance of Rain. Low around 46°F. Wind around 7 mph, with gusts as high as 13 mph.
Sunday
Thunderstorms Likely. High near 66°F. Wind around 18 mph, with gusts as high as 26 mph.
Sunday Night
Thunderstorms. Low around 48°F. Wind around 16 mph, with gusts as high as 22 mph.
Monday
Rain Showers Likely. High near 62°F. Wind 22 to 25 mph, with gusts as high as 33 mph.
Monday Night
Partly Cloudy. Low around 39°F. Wind around 15 mph, with gusts as high as 22 mph.
Tuesday
Partly Sunny. High near 59°F. Wind 6 to 9 mph, with gusts as high as 14 mph.
Tuesday Night
Slight Chance of Rain. Low around 39°F. Wind around 3 mph, with gusts as high as 7 mph.
IA Radar
Current Radar • IA
Day 1 Outlook • April 23, 2026

Observation History — Walnut, IA

Time Wind
(mph)		 Vis
(mi)		 Weather Precip (in) Temperature (F) Relative
Humidity		 Wind
Chill
(F)		 Heat
Index
(F)		 Pressure
Air Dwpt altimeter
(in)		 sea level
(mb)
08:55 PM CDT S 18.3 G 26.4 10.00 Clear -- 66.2 57.2 73% NA NA 29.77 1008.1
08:35 PM CDT S 20.8 G 28.9 10.00 Mostly Clear and Windy -- 68.0 57.2 68% NA NA 29.76 1007.8
08:15 PM CDT S 18.3 G 31.1 10.00 Clear -- 69.8 57.2 64% NA NA 29.75 1007.5
07:55 PM CDT S 20.8 G 31.1 10.00 Clear and Windy -- 71.6 57.2 60% NA 71.2 29.74 1007.1
07:35 PM CDT S 26.4 G 35.8 10.00 Clear and Breezy -- 73.4 57.2 57% NA 73.0 29.73 1006.8
06:55 PM CDT S 21.9 G 31.1 10.00 Clear and Windy -- 75.2 57.2 54% NA 75.0 29.74 1007.1
06:35 PM CDT S 23.0 G 33.3 10.00 Clear and Windy -- 75.2 57.2 54% NA 75.0 29.75 1007.5
06:15 PM CDT G 31.1 10.00 Clear -- 77.0 57.2 50% NA 76.8 29.76 1007.8
05:55 PM CDT G 33.3 10.00 Clear -- 77.0 55.4 47% NA 76.6 29.75 1007.5
05:35 PM CDT G 33.3 10.00 Clear -- 77.0 55.4 47% NA 76.6 29.76 1007.8
05:15 PM CDT S 23.0 G 32.2 10.00 Clear and Windy -- 78.8 55.4 45% NA 78.4 29.77 1008.1
04:55 PM CDT S 18.3 G 30.0 10.00 Clear -- 78.8 55.4 45% NA 78.4 29.77 1008.1
04:35 PM CDT S 18.3 G 31.1 10.00 Clear -- 78.8 57.2 48% NA 78.6 29.77 1008.1
04:15 PM CDT S 23.0 G 28.9 10.00 Clear and Windy -- 78.8 57.2 48% NA 78.6 29.78 1008.5
03:55 PM CDT S 24.2 G 30.0 10.00 Clear and Windy -- 78.8 57.2 48% NA 78.6 29.78 1008.5
03:35 PM CDT S 24.2 G 31.1 10.00 Clear and Windy -- 78.8 57.2 48% NA 78.6 29.79 1008.8
02:55 PM CDT 10.00 Clear -- 77.0 57.2 50% NA 76.8 29.82 1009.8
02:35 PM CDT S 23.0 G 32.2 10.00 Clear and Windy -- 77.0 57.2 50% NA 76.8 29.83 1010.2
02:15 PM CDT 10.00 Clear -- 77.0 57.2 50% NA 76.8 29.83 1010.2
01:55 PM CDT S 23.0 10.00 Clear and Windy -- 75.2 57.2 54% NA 75.0 29.85 1010.8
01:35 PM CDT S 19.7 G 28.9 10.00 Clear and Windy -- 75.2 59.0 57% NA 75.0 29.86 1011.2
01:15 PM CDT 10.00 Clear -- 73.4 57.2 57% NA 73.0 29.86 1011.2
12:55 PM CDT S 23.0 10.00 Clear and Windy -- 73.4 57.2 57% NA 73.0 29.87 1011.5
12:35 PM CDT 19.7 G 25.3 10.00 Clear and Windy -- 73.4 59.0 61% NA 73.2 29.89 1012.2

Regional Weather Observation

HARLAN MUNI (KHNR)

Clear
66.2 F

DENISON (KDNS)

Clear
68.0 F

ATLANTIC (KAIO)

Partly Cloudy
66.2 F

COUNCIL BLUFFS (KCBF)

Cloudy and Windy
68.0 F

OMAHA/EPPLEY (KOMA)

Cloudy and Windy
69.8 F

RED OAK (KRDK)

Cloudy and Windy
68.0 F
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