Harlan, IA Weather Forecast & Alerts

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

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Current Conditions — Harlan, IA

DENISON (KDNS)

Fog/Mist

62.6 F
Humidity:100%
Wind Speed:S 12.8 G 19.7 mph
Barometer:29.63 in
Dewpoint:62.6 F
Visibility:5.00 mi
Precip:--
Heat Index:NA
Wind Chill:NA
Apr 23 2026, 07:15 AM CDT
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5-Day Forecast — Harlan, IA

Thursday

High 73 °F
T-storms Likely
Thursday
Night
Low 42 °F
Chance of T-storms
Friday

High 64 °F
Mostly Sunny
Friday
Night
Low 41 °F
Partly Cloudy
Saturday

High 62 °F
Chance of Rain Showers
Saturday
Night
Low 46 °F
Chance of Rain
Sunday

High 64 °F
T-storms Likely
Sunday
Night
Low 48 °F
T-storms
Monday

High 62 °F
Rain Showers Likely

Detailed Forecast — Harlan, IA

Thursday
Thunderstorms Likely. High near 73°F. Wind 9 to 20 mph, with gusts as high as 30 mph.
Thursday Night
Chance of Thunderstorms. Low around 42°F. Wind 8 to 10 mph, with gusts as high as 20 mph.
Friday
Mostly Sunny. High near 64°F. Wind 7 to 10 mph, with gusts as high as 17 mph.
Friday Night
Partly Cloudy. Low around 41°F. Wind around 5 mph, with gusts as high as 10 mph.
Saturday
Chance of Rain Showers. High near 62°F. Wind 7 to 12 mph, with gusts as high as 16 mph.
Saturday Night
Chance of Rain. Low around 46°F. Wind around 6 mph, with gusts as high as 12 mph.
Sunday
Thunderstorms Likely. High near 64°F. Wind 15 to 16 mph, with gusts as high as 24 mph.
Sunday Night
Thunderstorms. Low around 48°F. Wind around 13 mph, with gusts as high as 20 mph.
Monday
Rain Showers Likely. High near 62°F. Wind 15 to 17 mph, with gusts as high as 24 mph.
Monday Night
Partly Cloudy. Low around 39°F. Wind around 10 mph, with gusts as high as 17 mph.
Tuesday
Partly Sunny. High near 59°F. Wind 7 to 12 mph, with gusts as high as 18 mph.
Tuesday Night
Slight Chance of Showers. Low around 39°F. Wind around 3 mph, with gusts as high as 8 mph.
Wednesday
Chance of Rain Showers. High near 60°F. Wind 8 to 9 mph, with gusts as high as 15 mph.
IA Radar
Current Radar • IA
Day 1 Outlook • April 23, 2026

Observation History — Harlan, 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)
07:15 AM CDT S 12.8 G 19.7 5.00 Fog/Mist -- 62.6 62.6 100% NA NA 29.63 1003.4
06:55 AM CDT S 11.4 G 18.3 3.00 Fog/Mist -- 62.6 62.6 100% NA NA 29.64 1003.7
06:35 AM CDT S 13.9 2.00 Fog/Mist -- 62.6 62.6 100% NA NA 29.65 1004.1
06:15 AM CDT 7.00 Cloudy -- 66.2 66.2 100% NA NA 29.66 1004.4
05:55 AM CDT 13.9 G 25.3 10.00 Cloudy -- 66.2 66.2 100% NA NA 29.66 1004.4
05:35 AM CDT G 30.0 10.00 Cloudy -- 66.2 66.2 100% NA NA 29.63 1003.4
05:15 AM CDT G 28.9 10.00 Cloudy -- 66.2 66.2 100% NA NA 29.62 1003.1
04:55 AM CDT G 33.3 10.00 Cloudy -- 66.2 66.2 100% NA NA 29.62 1003.1
04:35 AM CDT G 31.1 10.00 Cloudy -- 64.4 64.4 100% NA NA 29.63 1003.4
04:15 AM CDT G 28.9 10.00 Cloudy -- 64.4 64.4 100% NA NA 29.64 1003.7
03:55 AM CDT G 31.1 10.00 Cloudy -- 64.4 64.4 100% NA NA 29.64 1003.7
03:35 AM CDT G 31.1 10.00 Cloudy -- 64.4 64.4 100% NA NA 29.65 1004.1
03:15 AM CDT S 19.7 G 30.0 10.00 Cloudy and Windy -- 64.4 64.4 100% NA NA 29.68 1004.8
02:55 AM CDT G 35.8 10.00 Cloudy -- 64.4 64.4 100% NA NA 29.68 1004.8
02:35 AM CDT G 33.3 10.00 Cloudy -- 64.4 64.4 100% NA NA 29.68 1005.1
02:15 AM CDT G 36.9 10.00 Cloudy -- 64.4 64.4 100% NA NA 29.68 1005.1
01:55 AM CDT G 31.1 10.00 Cloudy -- 64.4 62.6 94% NA NA 29.68 1005.1
01:35 AM CDT G 28.9 10.00 Cloudy -- 64.4 62.6 94% NA NA 29.69 1005.4
01:15 AM CDT S 19.7 G 27.7 10.00 Mostly Cloudy and Windy -- 62.6 62.6 100% NA NA 29.70 1005.8
12:55 AM CDT 10.00 Mostly Clear -- 62.6 62.6 100% NA NA 29.71 1006.1
12:35 AM CDT G 27.7 10.00 Clear -- 62.6 62.6 100% NA NA 29.72 1006.4
12:15 AM CDT G 31.1 10.00 Clear -- NULL % NA NA M
11:55 PM CDT G 30.0 10.00 Clear -- 64.4 60.8 88% NA NA 29.73 1006.8
11:35 PM CDT S 19.7 G 27.7 10.00 Clear and Windy -- 64.4 59.0 83% NA NA 29.74 1007.1

Regional Weather Observation

DENISON (KDNS)

Fog/Mist
62.6 F

HARLAN MUNI (KHNR)

Fog/Mist
64.4 F

ATLANTIC (KAIO)

Fog/Mist
NULL F

OMAHA/EPPLEY (KOMA)

Light Rain
64.4 F

COUNCIL BLUFFS (KCBF)

Light Rain and Fog/Mist
64.4 F

OFFUTT AFB/BELLE (KOFF)

Light Drizzle
66.2 F
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