Excessive Heat 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, Louisa, IA, Jefferson, IA, Henry, IA, Des Moines, IA, Van Buren, IA, Lee, IA, Whiteside, IL, Rock Island, IL, Henry, IL, Bureau, IL, Putnam, IL, Mercer, IL, Henderson, IL, Warren, IL, Hancock, IL, McDonough, IL, Scotland, MO, Clark, MO 9:00 PM Extreme Heat Watch 10:00 PM

Jefferson County, Iowa, United States

Last updated: 7:44 AM CDT  ·  Refresh
26°C
Feels like 31°
Fog
▲ 38°  /  ▼ 24°
Wind
4 mph SSW
Humidity
95%
Dew Point
25°
Pressure
29.10 inHg
Visibility
0 mi
UV Index
3.4
Cloud Cover
71%
Sunrise
5:58 AM
Sunset
8:29 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Jefferson County is currently fog at 26°C. Precipitation is likely — peak probability 51% around 5 PM. Atmospheric instability is elevated (CAPE up to 3798 J/kg) — isolated convective development possible. Sunrise: 5:58AM · Sunset: 8:29PM.

Alerts

Excessive Heat 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, Louisa, IA, Jefferson, IA, Henry, IA, Des Moines, IA, Van Buren, IA, Lee, IA, Whiteside, IL, Rock Island, IL, Henry, IL, Bureau, IL, Putnam, IL, Mercer, IL, Henderson, IL, Warren, IL, Hancock, IL, McDonough, IL, Scotland, MO, Clark, MO
Expires 9:00 PM
Extreme Heat Watch
Expires 10:00 PM
52 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
26°
11%
8 AM
27°
29%
9 AM
29°
21%
10 AM
32°
21%
11 AM
34°
14%
12 PM
35°
14%
1 PM
36°
15%
2 PM
37°
18%
3 PM
38°
19%
4 PM
38°
41%
5 PM
36°
51%
6 PM
34°
45%
7 PM
33°
40%
8 PM
31°
28%
9 PM
29°
32%
10 PM
28°
31%
11 PM
28°
32%
12 AM
28°
23%
1 AM
27°
17%
2 AM
27°
17%
3 AM
26°
18%
4 AM
26°
13%
5 AM
26°
9%
6 AM
26°
9%
7-Day Forecast
Today
38° 24°
Partly Cloudy with a 41% chance of rain.
Mon
38° 24°
Partly Cloudy with a 25% chance of rain.
Tue
32° 21°
Partly Cloudy.
Wed
31° 19°
Mostly Clear with a 32% chance of rain.
Thu
32° 18°
Rain, 64% chance.
Fri
29° 20°
Rain, 64% chance.
Sat
29° 18°
Rain, 55% chance.
TimeTempConditionsPrecipWindHumidity
Now 26° Fog 11% 4 mph SSW 95%
8 AM 27° Mostly Cloudy 29% 6 mph SSW 90%
9 AM 29° Partly Cloudy 21% 6 mph SW 84%
10 AM 32° Partly Cloudy 21% 6 mph SW 77%
11 AM 34° Mostly Cloudy 14% 6 mph WSW 69%
12 PM 35° Mostly Cloudy 14% 5 mph WSW 63%
1 PM 36° Mostly Cloudy 15% 4 mph W 59%
2 PM 37° Partly Cloudy 18% 4 mph W 55%
3 PM 38° Partly Cloudy 19% 5 mph WNW 51%
4 PM 38° Partly Cloudy 41% 4 mph WNW 52%
5 PM 36° Partly Cloudy 51% 4 mph S 54%
6 PM 34° Partly Cloudy 45% 5 mph S 57%
7 PM 33° Partly Cloudy 40% 4 mph S 60%
8 PM 31° Partly Cloudy 28% 5 mph S 63%
9 PM 29° Partly Cloudy 32% 6 mph SSW 65%
10 PM 28° Partly Cloudy 31% 7 mph SSW 68%
11 PM 28° Partly Cloudy 32% 7 mph SSW 71%
12 AM 28° Partly Cloudy 23% 7 mph SW 74%
1 AM 27° Partly Cloudy 17% 6 mph SW 76%
2 AM 27° Partly Cloudy 17% 6 mph SSW 79%
3 AM 26° Partly Cloudy 18% 6 mph SSW 82%
4 AM 26° Partly Cloudy 13% 6 mph S 83%
5 AM 26° Partly Cloudy 9% 6 mph S 84%
6 AM 26° Partly Cloudy 9% 7 mph SSE 85%
15-Day Forecast
Today
7/26
Partly Cloudy
41%
24°
38°
Mon
7/27
Partly Cloudy
25%
24°
38°
Tue
7/28
Partly Cloudy
14%
21°
32°
Wed
7/29
Mostly Clear
32%
19°
31°
Thu
7/30
Rain
64%
18°
32°
Fri
7/31
Rain
64%
20°
29°
Sat
8/1
Rain
55%
18°
29°
Sun
8/2
Clear
18%
18°
31°
Mon
8/3
Drizzle
44%
18°
33°
Tue
8/4
Clear
44%
21°
35°
Wed
8/5
Drizzle
60%
19°
33°
Thu
8/6
Drizzle
60%
19°
32°
Fri
8/7
Drizzle
60%
19°
33°
Sat
8/8
Rain
90%
20°
35°
Sun
8/9
Drizzle
60%
21°
36°
52
Moderate
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

Air quality is acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
52 AQI 9.8 µg/m³
O3
Ground-level ozone
36 AQI 39 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Mon 52 Moderate 36 52
Tue 49 Good 33 49
Wed 56 Moderate 34 56
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 LCLLFCEL0°C Temperature (°C) Pressure (hPa)
Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio
RAP
Valid Sun Jul 26, 11:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE3040 J/kg
MLCAPE2719 J/kg
MUCAPE4710 J/kg
SBCIN-322 J/kg
MLCIN0 J/kg
Lifted Index-8.6
Kinematics
0–6 km Shear35 kt
0–1 km Shear15 kt
Eff. Shear31 kt
0–1 km SRH-37
0–3 km SRH-138
Eff. SRH-149
Storm Motion268° @ 21 kt
0–1 km EHI-0.7
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index24.9
Thermo & Levels
PWAT1.63 in
0–3 km LR4.3 °C/km
700–500 LR7.6 °C/km
Total Totals46.4
LCL974 hPa
LFC707 hPa
EL160 hPa
Freezing Lvl15,495 ft