Excessive Heat Warning — Greene, IL, Macoupin, IL, Montgomery, IL, Bond, IL, Fayette, IL, Clinton, IL, Marion, IL, Washington, IL, Randolph, IL, Adams, IL, Brown, IL, Pike, IL, Calhoun, IL, Jersey, IL, Knox, MO, Lewis, MO, Shelby, MO, Marion, MO, Monroe, MO, Ralls, MO, Pike, MO, Montgomery, MO, Lincoln, MO, Gasconade, MO, Warren, MO, Franklin, MO, Crawford, MO, Washington, MO, St. Francois, MO, Ste. Genevieve, MO, Iron, MO, Madison, MO, Reynolds, MO 9:00 PM Excessive Heat Watch 7:00 PM

Washington County, Missouri, United States

Last updated: 7:44 AM CDT  ·  Refresh
26°C
Feels like 31°
Partly Cloudy
▲ 37°  /  ▼ 23°
Wind
4 mph WSW
Humidity
87%
Dew Point
24°
Pressure
28.94 inHg
Visibility
6 mi
UV Index
4.0
Cloud Cover
57%
Sunrise
6:01 AM
Sunset
8:17 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Washington County is currently partly cloudy at 26°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 4077 J/kg) — isolated convective development possible. Sunrise: 6:01AM · Sunset: 8:17PM.

Alerts

Excessive Heat Warning
Greene, IL, Macoupin, IL, Montgomery, IL, Bond, IL, Fayette, IL, Clinton, IL, Marion, IL, Washington, IL, Randolph, IL, Adams, IL, Brown, IL, Pike, IL, Calhoun, IL, Jersey, IL, Knox, MO, Lewis, MO, Shelby, MO, Marion, MO, Monroe, MO, Ralls, MO, Pike, MO, Montgomery, MO, Lincoln, MO, Gasconade, MO, Warren, MO, Franklin, MO, Crawford, MO, Washington, MO, St. Francois, MO, Ste. Genevieve, MO, Iron, MO, Madison, MO, Reynolds, MO
Expires 9:00 PM
Excessive Heat Watch
Expires 7:00 PM
43 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
26°
16%
8 AM
28°
33%
9 AM
29°
32%
10 AM
31°
31%
11 AM
32°
25%
12 PM
33°
21%
1 PM
35°
35%
2 PM
36°
35%
3 PM
36°
35%
4 PM
35°
29%
5 PM
35°
29%
6 PM
33°
29%
7 PM
32°
29%
8 PM
31°
17%
9 PM
29°
17%
10 PM
29°
17%
11 PM
28°
17%
12 AM
27°
8%
1 AM
26°
3%
2 AM
26°
3%
3 AM
26°
3%
4 AM
26°
3%
5 AM
25°
3%
6 AM
25°
3%
7-Day Forecast
Today
37° 23°
Partly Cloudy with a 35% chance of rain.
Mon
39° 25°
Mostly Clear.
Tue
38° 23°
Partly Cloudy with a 20% chance of rain.
Wed
33° 19°
Mostly Clear with a 28% chance of rain.
Thu
34° 19°
Rain, 43% chance.
Fri
32° 20°
Rain, 82% chance.
Sat
32° 18°
Clear with a 52% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 26° Partly Cloudy 16% 4 mph WSW 87%
8 AM 28° Mostly Cloudy 33% 5 mph W 80%
9 AM 29° Mostly Cloudy 32% 5 mph W 74%
10 AM 31° Partly Cloudy 31% 6 mph W 68%
11 AM 32° Partly Cloudy 25% 6 mph W 63%
12 PM 33° Mostly Clear 21% 6 mph W 58%
1 PM 35° Mostly Clear 35% 7 mph W 54%
2 PM 36° Partly Cloudy 35% 7 mph W 51%
3 PM 36° Partly Cloudy 35% 7 mph WSW 48%
4 PM 35° Mostly Clear 29% 6 mph WSW 52%
5 PM 35° Partly Cloudy 29% 6 mph W 58%
6 PM 33° Mostly Cloudy 29% 7 mph WNW 64%
7 PM 32° Partly Cloudy 29% 6 mph ESE 66%
8 PM 31° Partly Cloudy 17% 4 mph S 65%
9 PM 29° Mostly Clear 17% 5 mph SSE 64%
10 PM 29° Mostly Clear 17% 4 mph S 65%
11 PM 28° Partly Cloudy 17% 4 mph S 68%
12 AM 27° Partly Cloudy 8% 4 mph SSW 71%
1 AM 26° Partly Cloudy 3% 5 mph SSW 72%
2 AM 26° Partly Cloudy 3% 5 mph SSW 72%
3 AM 26° Partly Cloudy 3% 6 mph SSW 72%
4 AM 26° Partly Cloudy 3% 6 mph SSW 73%
5 AM 25° Partly Cloudy 3% 5 mph SW 74%
6 AM 25° Partly Cloudy 3% 5 mph SW 75%
15-Day Forecast
Today
7/26
Partly Cloudy
35%
23°
37°
Mon
7/27
Mostly Clear
6%
25°
39°
Tue
7/28
Partly Cloudy
20%
23°
38°
Wed
7/29
Mostly Clear
28%
19°
33°
Thu
7/30
Rain
43%
19°
34°
Fri
7/31
Rain
82%
20°
32°
Sat
8/1
Clear
52%
18°
32°
Sun
8/2
Clear
18%
19°
32°
Mon
8/3
Drizzle
44%
19°
34°
Tue
8/4
Drizzle
51%
21°
35°
Wed
8/5
Drizzle
60%
22°
36°
Thu
8/6
Drizzle
60%
21°
35°
Fri
8/7
Drizzle
60%
21°
34°
Sat
8/8
Drizzle
60%
20°
34°
Sun
8/9
Drizzle
60%
21°
36°
43
Good
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

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

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
43 AQI 7.9 µg/m³
O3
Ground-level ozone
36 AQI 40 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Mon 43 Good 36 43
Tue 36 Good 32 36
Wed 87 Moderate 87 29
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 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE2202 J/kg
MLCAPE2027 J/kg
MUCAPE2373 J/kg
SBCIN-203 J/kg
MLCIN0 J/kg
Lifted Index-4.1
Kinematics
0–6 km Shear11 kt
0–1 km Shear17 kt
Eff. Shear17 kt
0–1 km SRH3
0–3 km SRH-36
Eff. SRH-36
Storm Motion311° @ 21 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index29.3
Thermo & Levels
PWAT1.54 in
0–3 km LR5.1 °C/km
700–500 LR5.7 °C/km
Total Totals45.4
LCL949 hPa
LFC721 hPa
EL168 hPa
Freezing Lvl16,608 ft