Johnson County, Iowa, United States

Last updated: 11:15 AM CDT · Refresh

18°C

Feels like 17°

Overcast

▲ 20° / ▼ 14°

Wind

12 mph NE

Humidity

94%

Dew Point

17°

Pressure

29.20 inHg

Visibility

4 mi

UV Index

2.3

Cloud Cover

97%

Sunrise

6:51 AM

Sunset

7:06 PM

Drag to pan · double-click to forecast a point

WeatherAI™ Analysis

WeatherAI Analysis: Johnson County is currently overcast at 18°C. Precipitation is likely — peak probability 54% around 11 AM. Sunrise: 6:51AM · Sunset: 7:06PM.

28 AQI · Good Dominant: O3 Air Quality

Hourly Forecast · Next 24 Hours

Now

18°

40%

12 PM

17°

52%

1 PM

17°

34%

2 PM

17°

34%

3 PM

17°

34%

4 PM

16°

34%

5 PM

17°

49%

6 PM

17°

45%

7 PM

17°

31%

8 PM

17°

31%

9 PM

17°

29%

10 PM

17°

37%

11 PM

17°

37%

12 AM

16°

34%

1 AM

16°

42%

2 AM

16°

41%

3 AM

16°

33%

4 AM

16°

37%

5 AM

14°

42%

6 AM

15°

43%

7 AM

15°

43%

8 AM

14°

43%

9 AM

14°

48%

10 AM

14°

48%

7-Day Forecast

Today

20° 14°

Overcast with a 49% chance of rain.

Mon

17° 12°

Overcast with a 66% chance of rain.

Tue

16° 9°

Mostly Cloudy with a 65% chance of rain.

Wed

19° 8°

Partly Cloudy.

Thu

20° 9°

Clear.

Fri

19° 12°

Clear.

Sat

19° 12°

Drizzle, 52% chance.

+ Feels like

TimeTempConditionsPrecipWindHumidity

Now 18° Overcast 40% 12 mph NE 94%

12 PM 17° Overcast 52% 13 mph NE 92%

1 PM 17° Overcast 34% 14 mph ENE 91%

2 PM 17° Overcast 34% 14 mph NE 91%

3 PM 17° Overcast 34% 14 mph NE 91%

4 PM 16° Overcast 34% 13 mph NE 91%

5 PM 17° Overcast 49% 13 mph NE 90%

6 PM 17° Overcast 45% 13 mph ENE 89%

7 PM 17° Overcast 31% 13 mph ENE 88%

8 PM 17° Overcast 31% 14 mph ENE 87%

9 PM 17° Overcast 29% 14 mph ENE 86%

10 PM 17° Overcast 37% 14 mph ENE 85%

11 PM 17° Overcast 37% 14 mph ENE 86%

12 AM 16° Overcast 34% 13 mph ENE 86%

1 AM 16° Overcast 42% 13 mph ENE 87%

2 AM 16° Overcast 41% 12 mph NE 86%

3 AM 16° Overcast 33% 11 mph NE 86%

4 AM 16° Overcast 37% 11 mph NE 86%

5 AM 14° Overcast 42% 11 mph ENE 85%

6 AM 15° Overcast 43% 11 mph ENE 85%

7 AM 15° Overcast 43% 12 mph ENE 85%

8 AM 14° Overcast 43% 12 mph ENE 86%

9 AM 14° Overcast 48% 12 mph ENE 87%

10 AM 14° Overcast 48% 12 mph ENE 87%

15-Day Forecast

Today

9/20

Overcast

49%

14°

20°

Mon

9/21

Overcast

66%

12°

17°

Tue

9/22

Mostly Cloudy

65%

9°

16°

Wed

9/23

Partly Cloudy

8°

19°

Thu

9/24

Clear

9°

20°

Fri

9/25

Clear

17%

12°

19°

Sat

9/26

Drizzle

52%

12°

19°

Sun

9/27

Drizzle

43%

11°

22°

Mon

9/28

Drizzle

44%

12°

23°

Tue

9/29

Drizzle

51%

13°

21°

Wed

9/30

Drizzle

60%

13°

21°

Thu

10/1

Drizzle

60%

12°

21°

Fri

10/2

Drizzle

60%

11°

20°

Sat

10/3

Drizzle

60%

11°

19°

Sun

10/4

Drizzle

60%

10°

18°

Good

U.S. Air Quality Index · Dominant: O3

50 100 150 200

Air quality is satisfactory and poses little or no health risk.

Pollutant Breakdown · Today

PM_2.5

Fine particulate matter

8 AQI 1.5 µg/m³

O₃

Ground-level ozone

Dominant

28 AQI 31 ppb

3-Day Outlook

DayAQICategoryO₃PM2.5

Mon 28 Good 28 8

Tue 19 Good 19 3

Wed 16 Good 16 7

About the Air Quality Index

0–50 Good

51–100 Moderate

101–150 Unhealthy for Sensitive Groups

151–200 Unhealthy

201–300 Very Unhealthy

301–500 Hazardous

The U.S. AQI runs 0–500. The overall value equals the highest individual pollutant sub-index, and the dominant pollutant is the one driving it. PM_2.5 (fine particles) is reported in µg/m³ and ozone (O₃) in ppb. Forecast source: NWS NAQFC.

Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio

RAP

Valid Sun Sep 20, 15:00'Z' · F0 · 130 (13 km CONUS/NA)

Hodograph · kt

0–1 1–3 3–6 6–9 km

Instability

SBCAPE2 J/kg

MLCAPE15 J/kg

MUCAPE1 J/kg

SBCIN-1 J/kg

MLCIN0 J/kg

Lifted Index4.0

Kinematics

0–6 km Shear23 kt

0–1 km Shear6 kt

Eff. Shear—

0–1 km SRH32

0–3 km SRH72

Eff. SRH—

Storm Motion345° @ 18 kt

0–1 km EHI0.0

Composite Parameters

Sig. Tornado0.0

STP (eff)—

Supercell—

K-Index30.5

Thermo & Levels

PWAT1.75 in

0–3 km LR3.9 °C/km

700–500 LR5.6 °C/km

Total Totals42.5

LCL975 hPa

LFC959 hPa

EL920 hPa

Freezing Lvl13,409 ft

Johnson County, Iowa, United States

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