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Johnson County
 Details for Johnson County Extreme Heat Warning
Extreme Heat Warning EXTREME HEAT WARNING - Johnson County
NWS North Mississippi Valley Regional Radar WU Central Satellite
Radar/Satellite images courtesy of NOAA/NWS and Weather Underground.
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Updated: @ 06-Sep-2026 4:30am  
Summary / Temperature Wind Rain Outlook
Clear Clear
Currently: 77.0, Max: 82.0, Min: 77.0 77°F
Colder 0.9°F than last hour.

Comfortable

Feels like: 77°F

24-hr difference
3.2°FWarmer 3.2°F than yesterday at this time.
  Today Yesterday
High: 82°F
12:30am 		103.8°F
2:40pm
Low: 77°F
4:30am 		73.6°F
4:50am
Calm SW
0
Gust:
 0 mph
0 Bft - Calm
Today: 0 mph 12:01am
Rain Today: 0 in
Rain Rate (/hr): 0 in
Rain Yesterday: 0 in
Storm Rain: 0 in
This Month: 0 in
Season Total: 78.28 in
18 days since last rain.
Sunday

Sunday: Mostly Sunny then Chance Showers And Thunderstorms
Mostly Sunny then Chance Showers And T-Storms
Humidity & Barometer Almanac Moon
Humidity: 82 % Increased 1.0% since last hour.
Dew Point: 71.1°F Decreased 0.5°F since last hour.
Barometer: 29.82 inHg Rising 0.01 inHg/hr
Baro Trend: Steady
Sunrise: 6:52am
Sunset: 7:41pm
Moonrise: 1:23am
Moonset: 5:09pm
Waning Crescent
Waning Crescent, Moon at 23 days in cycle
27%
Illuminated
UV Index Solar Radiation
   0    None
High: 0 @ 12:01am
0 W/m2
High: 0 @  12:01am
 NWS Weather Forecast  - Outlook
Overnight

Overnight: Mostly Clear
Mostly Clear
Sunday

Sunday: Mostly Sunny then Chance Showers And Thunderstorms
Mostly Sunny then Chance Showers And T-Storms
Sunday
Night
Sunday Night: Chance Showers And Thunderstorms then Partly Cloudy
Chance Showers And T-Storms then Partly Cloudy
Labor
Day
Labor Day: Sunny
Sunny
Monday
Night
Monday Night: Mostly Clear
Mostly Clear
Tuesday

Tuesday: Sunny
Sunny
Tuesday
Night
Tuesday Night: Mostly Clear
Mostly Clear
Lo 74 °F Hi 98 °F Lo 73 °F Hi 96 °F Lo 74 °F Hi 99 °F Lo 77 °F
Detailed National Weather Service Forecast