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Johnson County IA Weather - Overcast - 61°F
Overcast
61°F
Updated 2:35 am
Feels Like 56°F
Humidity 80%
Wind E 7 mph
Barometer  30.35 in
Dew Point 55°F
Johnson County IA Weather - Overcast - 16°C
Overcast
16°C
Updated 2:35 am
Feels Like 13°C
Humidity 80%
Wind E 11 km/h
Barometer  102.7 kPa
Dew Point 13°C
Johnson County, IA Weather and Current Conditionsjohnson county ia weather forecast

Johnson County, IA Weather Forecast

Johnson County Iowa WeatherJohnson County, Iowa Weather Weather Forecast
14 day API forecast for Johnson County, Iowa. Note. The 7-day weather forecast for Johnson County, IA is the most reliable and accurate forecast. This model should only be used as a likely scenario. It is difficult to predict weather more than 7 days in advance.
Johnson County, IA Weather Forecast Dated: 235 AM Thu Sep 24 2026
Expect a cool pattern with a mix of sun and clouds and occasional showers over the coming period. generally humid conditions and no major pressure swings will dominate.

Thursday, September 24, 2026

Mid-Morning
Johnson County Weather - 2026-09-24 - Morning - Cloudy
55°F 13°C
Cloudy
Mid-Afternoon
Johnson County Weather - 2026-09-24 - Afternoon - Overcast
68°F 20°C
Overcast
Early-Evening
Johnson County Weather - 2026-09-24 - Evening - Scattered Showers
65°F 19°C
Scattered Showers
Pleasant near 68°F 20°C, periods of heavy rain and gusty conditions, with steady humidity and steady pressure.

Friday, September 25, 2026

Mid-Morning
Johnson County Weather - 2026-09-25 - Morning - Drizzle
59°F 15°C
Drizzle
Mid-Afternoon
Johnson County Weather - 2026-09-25 - Afternoon - Scattered Showers
60°F 16°C
Scattered Showers
Early-Evening
Johnson County Weather - 2026-09-25 - Evening - Drizzle
58°F 15°C
Drizzle
Mildly cool near 60°F 16°C, scattered downpours possible, with steady humidity and steady pressure.

Saturday, September 26, 2026

Mid-Morning
Johnson County Weather - 2026-09-26 - Morning - Overcast
55°F 13°C
Overcast
Mid-Afternoon
Johnson County Weather - 2026-09-26 - Afternoon - Overcast
63°F 17°C
Overcast
Early-Evening
Johnson County Weather - 2026-09-26 - Evening - Overcast
63°F 17°C
Overcast
Comfortable at 63°F 17°C, overcast throughout the day, with steady humidity and steady pressure. Winds turning from the ESE to the SSE at 6 mph 10 km/h.

Sunday, September 27, 2026

Mid-Morning
Johnson County Weather - 2026-09-27 - Morning - Cloudy
58°F 15°C
Cloudy
Mid-Afternoon
Johnson County Weather - 2026-09-27 - Afternoon - Overcast
68°F 20°C
Overcast
Early-Evening
Johnson County Weather - 2026-09-27 - Evening - Sunny
65°F 18°C
Sunny
Mild temperatures up to 68°F 20°C, cloudy in the morning, overcast in the afternoon, and cloudy this evening, with steady humidity and steady pressure.

Monday, September 28, 2026

Mid-Morning
Johnson County Weather - 2026-09-28 - Morning - Overcast
59°F 15°C
Overcast
Mid-Afternoon
Johnson County Weather - 2026-09-28 - Afternoon - Sunny
70°F 21°C
Sunny
Early-Evening
Johnson County Weather - 2026-09-28 - Evening - Sunny
65°F 19°C
Sunny
Mild with a high of 70°F 21°C, overcast in the morning, becoming sunny through the afternoon and evening, with steady humidity and steady pressure. Winds blowing from the SSE at 9 mph 14 km/h.

Tuesday, September 29, 2026

Mid-Morning
Johnson County Weather - 2026-09-29 - Morning - Overcast
61°F 16°C
Overcast
Mid-Afternoon
Johnson County Weather - 2026-09-29 - Afternoon - Overcast
65°F 18°C
Overcast
Early-Evening
Johnson County Weather - 2026-09-29 - Evening - Heavy Rain
63°F 18°C
Heavy Rain
Mildly cool near 65°F 18°C, dry most of the day, with showers developing late, with increasing humidity and barometric pressure falling. Winds moving from the SSE to the W at 12 mph 19 km/h. Gusts up to 28 mph 44 km/h.

Wednesday, September 30, 2026

Mid-Morning
Johnson County Weather - 2026-09-30 - Morning - Light Showers
46°F 8°C
Light Showers
Mid-Afternoon
Johnson County Weather - 2026-09-30 - Afternoon - Scattered Showers
53°F 12°C
Scattered Showers
Early-Evening
Johnson County Weather - 2026-09-30 - Evening - Sunny
50°F 10°C
Sunny
Chilly near 53°F 12°C, periods of heavy rain and gusty conditions, with lower humidity and barometric pressure rising. Winds out of the WNW at 16 mph 26 km/h.

Thursday, October 1, 2026

Mid-Morning
Johnson County Weather - 2026-10-01 - Morning - Sunny
46°F 8°C
Sunny
Mid-Afternoon
Johnson County Weather - 2026-10-01 - Afternoon - Sunny
58°F 15°C
Sunny
Early-Evening
Johnson County Weather - 2026-10-01 - Evening - Sunny
55°F 13°C
Sunny
Cool with a high near 58°F 15°C, sunny throughout the day, with steady humidity and steady pressure. Winds shifting from the SW to the S at 7 mph 11 km/h.

Friday, October 2, 2026

Mid-Morning
Johnson County Weather - 2026-10-02 - Morning - Sunny
53°F 12°C
Sunny
Mid-Afternoon
Johnson County Weather - 2026-10-02 - Afternoon - Overcast
64°F 18°C
Overcast
Early-Evening
Johnson County Weather - 2026-10-02 - Evening - Overcast
59°F 15°C
Overcast
Refreshing around 64°F 18°C, sunny in the morning, overcast in the afternoon, and cloudy this evening, with steady humidity and steady pressure.

Saturday, October 3, 2026

Mid-Morning
Johnson County Weather - 2026-10-03 - Morning - Overcast
52°F 11°C
Overcast
Mid-Afternoon
Johnson County Weather - 2026-10-03 - Afternoon - Overcast
50°F 10°C
Overcast
Early-Evening
Johnson County Weather - 2026-10-03 - Evening - Scattered Showers
51°F 11°C
Scattered Showers
Cool and brisk at 50°F 10°C, periods of heavy rain and gusty conditions, with steady humidity and steady pressure. Winds turning from the WSW to the NW at 10 mph 16 km/h. Gusts up to 22 mph 36 km/h.

Sunday, October 4, 2026

Mid-Morning
Johnson County Weather - 2026-10-04 - Morning - Sunny
49°F 9°C
Sunny
Mid-Afternoon
Johnson County Weather - 2026-10-04 - Afternoon - Overcast
57°F 14°C
Overcast
Early-Evening
Johnson County Weather - 2026-10-04 - Evening - Overcast
55°F 13°C
Overcast
Chilly near 57°F 14°C, cloudy in the morning, becoming overcast through the afternoon and evening, with steady humidity and steady pressure.

Monday, October 5, 2026

Mid-Morning
Johnson County Weather - 2026-10-05 - Morning - Overcast
52°F 11°C
Overcast
Mid-Afternoon
Johnson County Weather - 2026-10-05 - Afternoon - Scattered Showers
61°F 16°C
Scattered Showers
Early-Evening
Johnson County Weather - 2026-10-05 - Evening - Overcast
62°F 16°C
Overcast
Cool with a high near 61°F 16°C, locally heavy downpours at times, with increasing humidity and steady pressure. Winds switching from the SSE to the W at 8 mph 13 km/h.

Tuesday, October 6, 2026

Mid-Morning
Johnson County Weather - 2026-10-06 - Morning - Overcast
47°F 9°C
Overcast
Mid-Afternoon
Johnson County Weather - 2026-10-06 - Afternoon - Overcast
56°F 14°C
Overcast
Early-Evening
Johnson County Weather - 2026-10-06 - Evening - Sunny
52°F 11°C
Sunny
Brisk around 56°F 14°C, overcast in the morning, partly cloudy in the afternoon, and sunny this evening, with steady humidity and steady pressure. Winds moving from the SE to the ENE at 4 mph 6 km/h.

Wednesday, October 7, 2026

Mid-Morning
Johnson County Weather - 2026-10-07 - Morning - Sunny
49°F 9°C
Sunny
Mid-Afternoon
Johnson County Weather - 2026-10-07 - Afternoon - Overcast
60°F 15°C
Overcast
Early-Evening
Johnson County Weather - 2026-10-07 - Evening - Cloudy
56°F 13°C
Cloudy
Mildly cool near 60°F 15°C, partly cloudy in the morning, overcast in the afternoon, and cloudy this evening, with steady humidity and barometric pressure falling. Winds swinging from the SE to the SSE at 7 mph 10 km/h.

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Weather by the Numbers

Thu, 24th
Johnson County IA Weather - Thursday, Sep 24, 2026 - Cloudy
Hi: 68°F 20°C
Lo: 53°F 11°C
Sunrise 06:56 AM
Sunset 07:00 PM
Wind ESE 8 mph13 km/h
Dew Point 55°F13°C
uv Index 5
Barometric Pressure 30.3 in1026 mb
POP 16% *
Humidity 72%
Fri, 25th
Johnson County IA Weather - Friday, Sep 25, 2026 - Mist
Hi: 62°F 17°C
Lo: 56°F 13°C
Sunrise 06:57 AM
Sunset 06:58 PM
Wind ESE 5 mph9 km/h
Dew Point 58°F14°C
uv Index 1
Barometric Pressure 30.27 in1025 mb
POP 38% *
Humidity 95%
Sat, 26th
Johnson County IA Weather - Saturday, Sep 26, 2026 - Overcast
Hi: 64°F 18°C
Lo: 55°F 13°C
Sunrise 06:58 AM
Sunset 06:56 PM
Wind ESE 8 mph13 km/h
Dew Point 51°F11°C
uv Index 1
Barometric Pressure 30.15 in1021 mb
POP 24% *
Humidity 81%
Sun, 27th
Johnson County IA Weather - Sunday, Sep 27, 2026 - Overcast
Hi: 69°F 20°C
Lo: 58°F 15°C
Sunrise 06:59 AM
Sunset 06:55 PM
Wind SE 4 mph7 km/h
Dew Point 51°F11°C
uv Index 2
Barometric Pressure 30.12 in1020 mb
POP 14% *
Humidity 62%
Mon, 28th
Johnson County IA Weather - Monday, Sep 28, 2026 - Overcast
Hi: 70°F 21°C
Lo: 56°F 13°C
Sunrise 07:00 AM
Sunset 06:53 PM
Wind SSE 11 mph18 km/h
Dew Point 51°F11°C
uv Index 4
Barometric Pressure 30 in1016 mb
POP 15% *
Humidity 62%
Tue, 29th
Johnson County IA Weather - Tuesday, Sep 29, 2026 - Overcast
Hi: 67°F 20°C
Lo: 54°F 12°C
Sunrise 07:01 AM
Sunset 06:51 PM
Wind SSE 15 mph23 km/h
Dew Point 51°F11°C
uv Index 4
Barometric Pressure 29.77 in1008 mb
POP 15% *
Humidity 62%
Wed, 30th
Johnson County IA Weather - Wednesday, Sep 30, 2026 - Patchy Rain Nearby
Hi: 55°F 13°C
Lo: 44°F 7°C
Sunrise 07:02 AM
Sunset 06:49 PM
Wind WNW 17 mph28 km/h
Dew Point 40°F5°C
uv Index 2
Barometric Pressure 29.91 in1013 mb
POP 21% *
Humidity 76%
Thu, 1st
Johnson County IA Weather - Thursday, Oct 1, 2026 - Sunny
Hi: 60°F 15°C
Lo: 41°F 5°C
Sunrise 07:03 AM
Sunset 06:48 PM
Wind S 7 mph11 km/h
Dew Point 39°F4°C
uv Index 4
Barometric Pressure 30.09 in1019 mb
POP 3% *
Humidity 58%
Fri, 2nd
Johnson County IA Weather - Friday, Oct 2, 2026 - Sunny
Hi: 64°F 18°C
Lo: 48°F 9°C
Sunrise 07:04 AM
Sunset 06:46 PM
Wind S 5 mph8 km/h
Dew Point 47°F8°C
uv Index 5
Barometric Pressure 29.97 in1015 mb
POP 9% *
Humidity 60%
Sat, 3rd
Johnson County IA Weather - Saturday, Oct 3, 2026 - Cloudy
Hi: 54°F 12°C
Lo: 48°F 9°C
Sunrise 07:05 AM
Sunset 06:44 PM
Wind N 14 mph22 km/h
Dew Point 42°F6°C
uv Index 3
Barometric Pressure 29.94 in1014 mb
POP 19% *
Humidity 72%
Sun, 4th
Johnson County IA Weather - Sunday, Oct 4, 2026 - Overcast
Hi: 58°F 14°C
Lo: 44°F 6°C
Sunrise 07:06 AM
Sunset 06:42 PM
Wind WNW 3 mph5 km/h
Dew Point 41°F5°C
uv Index 3
Barometric Pressure 30.15 in1021 mb
POP 14% *
Humidity 58%
Mon, 5th
Johnson County IA Weather - Monday, Oct 5, 2026 - Patchy Rain Nearby
Hi: 63°F 17°C
Lo: 49°F 9°C
Sunrise 07:08 AM
Sunset 06:41 PM
Wind S 12 mph19 km/h
Dew Point 48°F9°C
uv Index 3
Barometric Pressure 29.94 in1014 mb
POP 27% *
Humidity 71%
Tue, 6th
Johnson County IA Weather - Tuesday, Oct 6, 2026 - Overcast
Hi: 57°F 14°C
Lo: 45°F 7°C
Sunrise 07:09 AM
Sunset 06:39 PM
Wind NNE 7 mph12 km/h
Dew Point 39°F4°C
uv Index 3
Barometric Pressure 30.24 in1024 mb
POP 13% *
Humidity 60%
Wed, 7th
Johnson County IA Weather - Wednesday, Oct 7, 2026 - Cloudy
Hi: 60°F 16°C
Lo: 45°F 7°C
Sunrise 07:10 AM
Sunset 06:37 PM
Wind SE 9 mph15 km/h
Dew Point 40°F4°C
uv Index 3
Barometric Pressure 30.24 in1024 mb
POP 12% *
Humidity 55%
* POP = Probability of Precipitation. Data for 12:00 PM.