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)

Mostly Cloudy

64.4 F
Humidity:100%
Wind Speed: G 30.0 mph
Barometer:29.59 in
Dewpoint:64.4 F
Visibility:9.00 mi
Precip:--
Heat Index:NA
Wind Chill:NA
Apr 23 2026, 08:55 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 60 °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 16 to 17 mph, with gusts as high as 25 mph.
Sunday Night
Thunderstorms. Low around 48°F. Wind around 14 mph, with gusts as high as 21 mph.
Monday
Rain Showers Likely. High near 60°F. Wind around 20 mph, with gusts as high as 28 mph.
Monday Night
Partly Cloudy. Low around 37°F. Wind around 9 mph, with gusts as high as 18 mph.
Tuesday
Partly Sunny. High near 59°F. Wind 6 to 9 mph, with gusts as high as 15 mph.
Tuesday Night
Slight Chance of Showers. Low around 41°F.
Wednesday
Chance of Rain Showers. High near 64°F. Wind 7 to 8 mph, with gusts as high as 14 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)
08:55 AM CDT G 30.0 9.00 Mostly Cloudy -- 64.4 64.4 100% NA NA 29.59 1002.0
08:35 AM CDT G 26.4 9.00 Mostly Cloudy -- 64.4 64.4 100% NA NA 29.60 1002.4
08:15 AM CDT 9.00 Mostly Cloudy -- 64.4 64.4 100% NA NA 29.61 1002.7
07:55 AM CDT S 17.2 G 23.0 7.00 Mostly Cloudy -- 64.4 64.4 100% NA NA 29.61 1002.7
07:35 AM CDT 17.2 7.00 Mostly Cloudy -- 62.6 62.6 100% NA NA 29.62 1003.1
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

Regional Weather Observation

DENISON (KDNS)

Mostly Cloudy
64.4 F

HARLAN MUNI (KHNR)

Cloudy
64.4 F

ATLANTIC (KAIO)

Cloudy
66.2 F

OMAHA/EPPLEY (KOMA)

Cloudy
66.2 F

COUNCIL BLUFFS (KCBF)

Cloudy
66.2 F

OFFUTT AFB/BELLE (KOFF)

Cloudy
67.6 F
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