Freeze Warning — Buchanan, IA, Delaware, IA, Dubuque, IA, Benton, IA, Linn, IA, Jones, IA, Jackson, IA, Iowa, IA, Johnson, IA, Cedar, IA, Clinton, IA, Muscatine, IA, Scott, IA, Keokuk, IA, Washington, IA, Jefferson, IA, Jo Daviess, IL, Stephenson, IL, Carroll, IL, Whiteside, IL, Rock Island, IL 9:00 AM

Johnson County, Iowa, United States

Last updated: 7:19 PM CDT  ·  Refresh
8°C
Feels like 6°
Mostly Clear
▲ 11°  /  ▼ 1°
Wind
11 mph NNW
Humidity
70%
Dew Point
3°
Pressure
29.64 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
20%
Sunrise
7:18 AM
Sunset
6:23 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Johnson County is currently mostly clear at 8°C. Dry conditions are expected through the next 24 hours. Sunrise: 7:18AM · Sunset: 6:23PM.

Alerts

Freeze Warning
Buchanan, IA, Delaware, IA, Dubuque, IA, Benton, IA, Linn, IA, Jones, IA, Jackson, IA, Iowa, IA, Johnson, IA, Cedar, IA, Clinton, IA, Muscatine, IA, Scott, IA, Keokuk, IA, Washington, IA, Jefferson, IA, Jo Daviess, IL, Stephenson, IL, Carroll, IL, Whiteside, IL, Rock Island, IL
Expires 9:00 AM
22 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
8°
8%
8 PM
8°
8%
9 PM
7°
3%
10 PM
6°
3%
11 PM
5°
3%
12 AM
4°
3%
1 AM
4°
3%
2 AM
3°
3%
3 AM
3°
3%
4 AM
3°
3%
5 AM
1°
3%
6 AM
1°
3%
7 AM
1°
3%
8 AM
3°
3%
9 AM
6°
3%
10 AM
8°
3%
11 AM
9°
3%
12 PM
10°
3%
1 PM
13°
3%
2 PM
14°
3%
3 PM
14°
3%
4 PM
14°
3%
5 PM
11°
3%
6 PM
10°
3%
7-Day Forecast
Tonight
11° 1°
Mostly Clear.
Sat
14° 1°
Clear.
Sun
19° 3°
Clear.
Mon
22° 5°
Clear.
Tue
22° 8°
Clear.
Wed
24° 10°
Clear.
Thu
26° 12°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 8° Mostly Clear 8% 11 mph NNW 70%
8 PM 8° Mostly Clear 8% 10 mph NNW 72%
9 PM 7° Clear 3% 8 mph NNW 75%
10 PM 6° Clear 3% 8 mph NNW 78%
11 PM 5° Clear 3% 7 mph N 80%
12 AM 4° Clear 3% 6 mph N 82%
1 AM 4° Clear 3% 5 mph N 83%
2 AM 3° Clear 3% 4 mph NNW 83%
3 AM 3° Clear 3% 4 mph NNW 83%
4 AM 3° Clear 3% 4 mph NW 83%
5 AM 1° Clear 3% 3 mph WNW 83%
6 AM 1° Clear 3% 3 mph W 83%
7 AM 1° Clear 3% 3 mph SW 81%
8 AM 3° Clear 3% 4 mph SSW 75%
9 AM 6° Clear 3% 5 mph SSW 67%
10 AM 8° Clear 3% 7 mph SSW 60%
11 AM 9° Clear 3% 8 mph SSW 54%
12 PM 10° Clear 3% 8 mph SSW 50%
1 PM 13° Clear 3% 9 mph SSW 46%
2 PM 14° Clear 3% 9 mph SSW 44%
3 PM 14° Clear 3% 9 mph SSW 44%
4 PM 14° Clear 3% 9 mph SSW 45%
5 PM 11° Clear 3% 9 mph SSW 50%
6 PM 10° Clear 3% 8 mph SSW 55%
15-Day Forecast
Today
10/16
Mostly Clear
8%
1°
11°
Sat
10/17
Clear
3%
1°
14°
Sun
10/18
Clear
3%
3°
19°
Mon
10/19
Clear
3%
5°
22°
Tue
10/20
Clear
3%
8°
22°
Wed
10/21
Clear
3%
10°
24°
Thu
10/22
Clear
3%
12°
26°
Fri
10/23
Clear
17%
13°
26°
Sat
10/24
Clear
44%
12°
27°
Sun
10/25
Clear
44%
8°
20°
Mon
10/26
Rain
50%
7°
17°
Tue
10/27
Clear
60%
7°
17°
Wed
10/28
Drizzle
60%
7°
18°
Thu
10/29
Drizzle
60%
8°
19°
Fri
10/30
Drizzle
60%
8°
18°
22
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
PM2.5
Fine particulate matter
19 AQI 3.4 µg/m³
O3
Ground-level ozone
Dominant
22 AQI 25 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 22 Good 22 19
Sun 27 Good 27 12
Mon 28 Good 28 22
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. PM2.5 (fine particles) is reported in µg/m³ and ozone (O3) in ppb. Forecast source: NWS NAQFC.

1000850700500400300250200150100 -40-30-20-10010203040 0.41247101624 LCL0°C Temperature (°C) Pressure (hPa)
Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio
RAP
Valid Fri Oct 16, 23:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 60 70 80 90 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE0 J/kg
MLCAPE3 J/kg
MUCAPE0 J/kg
SBCIN—
MLCIN0 J/kg
Lifted Index14.8
Kinematics
0–6 km Shear47 kt
0–1 km Shear20 kt
Eff. Shear—
0–1 km SRH105
0–3 km SRH118
Eff. SRH—
Storm Motion25° @ 40 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index-22.7
Thermo & Levels
PWAT0.35 in
0–3 km LR4.9 °C/km
700–500 LR4.7 °C/km
Total Totals31.0
LCL925 hPa
LFC—
EL—
Freezing Lvl4,121 ft