Harper, IA Weather Forecast & Alerts

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

Current Conditions — Harper, IA

OSKALOOSA MUNI (KOOA)

Clear

53.8 F
Humidity:48%
Wind Speed: 0.0 mph
Barometer:30.05 in
Dewpoint:34.7 F
Visibility:10.00 mi
Precip:--
Heat Index:NA
Wind Chill:NA
May 1 2026, 09:55 AM CDT
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5-Day Forecast — Harper, IA

Friday

High 57 °F
Chance of T-storms
Friday
Night
Low 35 °F
Partly Cloudy
Saturday

High 60 °F
Mostly Sunny
Saturday
Night
Low 44 °F
Partly Cloudy
Sunday

High 73 °F
Mostly Cloudy
Sunday
Night
Low 48 °F
Partly Cloudy
Monday

High 78 °F
Isolated T-storm
Monday
Night
Low 46 °F
Chance of Showers
Tuesday

High 64 °F
Chance of Rain Showers

Detailed Forecast — Harper, IA

Friday
Chance of Thunderstorms. High near 57°F. Wind 5 to 12 mph, with gusts as high as 17 mph.
Friday Night
Partly Cloudy. Low around 35°F. Wind 5 to 8 mph, with gusts as high as 13 mph.
Saturday
Mostly Sunny. High near 60°F. Wind 6 to 8 mph, with gusts as high as 13 mph.
Saturday Night
Partly Cloudy. Low around 44°F. Wind 7 to 12 mph, with gusts as high as 20 mph.
Sunday
Mostly Cloudy. High near 73°F. Wind 10 to 15 mph, with gusts as high as 23 mph.
Sunday Night
Partly Cloudy. Low around 48°F. Wind around 7 mph, with gusts as high as 12 mph.
Monday
Isolated T-storm. High near 78°F. Wind 14 to 15 mph, with gusts as high as 23 mph.
Monday Night
Chance of Showers. Low around 46°F. Wind around 10 mph, with gusts as high as 18 mph.
Tuesday
Chance of Rain Showers. High near 64°F. Wind 10 to 14 mph, with gusts as high as 21 mph.
Tuesday Night
Chance of Rain. Low around 41°F. Wind around 7 mph, with gusts as high as 12 mph.
Wednesday
Slight Chance of Rain Showers. High near 60°F. Wind 12 to 15 mph, with gusts as high as 21 mph.
Wednesday Night
Partly Cloudy. Low around 39°F. Wind around 6 mph, with gusts as high as 9 mph.
Thursday
Partly Sunny. High near 64°F. Wind 9 to 15 mph, with gusts as high as 22 mph.
IA Radar
Current Radar • IA
Day 1 Outlook • May 1, 2026

Observation History — Harper, 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)
09:55 AM CDT 0.0 10.00 Clear -- 53.8 34.7 48% NA NA 30.05 1017.6
09:35 AM CDT 3.4 10.00 Clear -- 52.5 34.7 51% NA NA 30.05 1017.6
09:15 AM CDT 4.7 10.00 Clear -- 50.9 34.7 54% NA NA 30.05 1017.6
08:55 AM CDT NW 3.4 10.00 Clear -- 49.5 34.2 55% 48.7 NA 30.05 1017.6
08:35 AM CDT 4.7 10.00 Clear -- 48.4 34.9 59% 46.6 NA 30.05 1017.6
08:15 AM CDT W 5.8 10.00 Clear -- 46.6 34.3 62% 43.7 NA 30.06 1018.0
07:55 AM CDT 3.4 10.00 Clear -- NULL 34.5 % NA NA 30.06 1018.0
07:35 AM CDT SW 4.7 10.00 Clear -- 41.7 36.1 80% 38.7 NA 30.06 1018.0
07:15 AM CDT 3.4 10.00 Clear -- 39.2 35.1 85% 37.0 NA 30.06 1018.0
06:55 AM CDT 0.0 10.00 Clear -- 40.8 34.3 78% NA NA 30.05 1017.6
06:35 AM CDT 0.0 10.00 Partly Cloudy -- 41.0 34.0 76% NA NA 30.04 1017.3
06:15 AM CDT 0.0 10.00 Partly Cloudy -- 40.6 34.0 77% NA NA 30.04 1017.3
05:55 AM CDT 0.0 10.00 Mostly Cloudy -- 40.5 33.6 76% NA NA 30.04 1017.3
05:35 AM CDT 0.0 10.00 Partly Cloudy -- 39.9 32.9 76% NA NA 30.05 1017.6
05:15 AM CDT 0.0 10.00 Partly Cloudy -- 40.1 32.4 74% NA NA 30.05 1017.6
03:55 AM CDT 0.0 10.00 Clear -- 39.9 31.8 73% NA NA 30.05 1017.6
03:35 AM CDT W 3.4 10.00 Clear -- 40.3 32.0 72% 38.3 NA 30.05 1017.6
03:15 AM CDT 4.7 10.00 Clear -- 40.6 32.0 71% 37.4 NA 30.05 1017.6
02:55 AM CDT W 5.8 10.00 Clear -- 38.8 32.0 76% 34.5 NA 30.05 1017.6
02:35 AM CDT W 6.9 10.00 Clear -- 39.2 31.8 75% 34.2 NA 30.05 1017.6
02:15 AM CDT 6.9 10.00 Clear -- 39.6 31.6 73% 34.7 NA 30.05 1017.6
01:55 AM CDT 5.8 10.00 Clear -- 40.1 31.6 72% 36.0 NA 30.06 1018.0
01:35 AM CDT W 4.7 10.00 Clear -- 40.1 31.8 72% 36.9 NA 30.06 1018.0
01:15 AM CDT 6.9 10.00 Clear -- 41.2 32.0 70% 36.7 NA 30.07 1018.3

Regional Weather Observation

OSKALOOSA MUNI (KOOA)

Clear
53.8 F

OTTUMWA (KOTM)

Cloudy
51.8 F

PELLA (KPEA)

Clear
51.6 F

CEDAR RAPIDS (KCID)

Mostly Cloudy
48.2 F

FAIRFIELD (KFFL)

Fog/Mist
59.0 F

WASHINGTON (KAWG)

Mostly Cloudy
50.0 F
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