Heat Advisory HEAT ADVISORY - Knox County

NWS Central Great Lakes Regional Radar WU East Central Satellite
Radar/Satellite images courtesy of NOAA/NWS and Weather Underground.
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METRIC | IMPERIAL
Updated: 06/28/2026 @ 1:15pm   (0 sec ago)
Temperature Current Conditions Forecast / Storm Prediction
Currently Outside: Warmer 3.8°F than last hour.

76.9°F

Comfortable
High Today
76.9°F
1:14 PM
Low Today
68.9°F
5:46 AM
Yest High
79.6°F
4:44 PM
Yest Low
66.5°F
12:00 AM
Sta* High
94.8°F
2019
Sta* Low
47.0°F
2017
* This Station's Records Since 1/2011
Rec* High
103.0°F
1901
Rec* Low
52.0°F
1950
* Records from Weather Underground
Cloudy, Humid Cloudy, Humid

Calm Wind:  W
0.0

Gusting to:
0.0 mph
Current Rain Rain:
0.12 in
Chandler Burning Index: LOW Current CBI
Fire Danger:
0.2 of 100
Today

Today: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Tonight

Tonight: Chance Showers And Thunderstorms then Partly Cloudy
Chance Showers And T-Storms then Partly Cloudy
Monday

Monday: Mostly Sunny
Mostly Sunny
Hi 85°F Lo 68°F Hi 90°F
SPC Activity Map
Dew Point Liquid Precipitation Wind Speed Sun/Moon
Current: Increased 1.2°F since last hour. 72°F
Last Hour: Increased 1.2°F since last hour. 1.2°F
High 1:14 PM: 72.0°F
Low 12:00 AM: 66.3°F
Record High: 83.5°F on
Jul-4-2025
Record Low: -40.7°F on
May-14-2018
Wetbulb: 73.6°F
Leaf Wet:7 0
Indoor Temp: 78.3°F
Rain Today
rain graph

Today: 0.12 in
Storm Rain: 0.40 in
Yesterday: 0.07 in
Last 7 Days: 1.18 in
Jun Rain: 3.76 in
Jun to Date
  Avg:10
0.00 in
Jun to Date
  Diff from Avg:10
Over 3.76 in for the month 3.76 in
Jun Avg: 2.32 in
Diff from Avg: Over 1.44 in for the month 1.44 in
Season:1 18.81 in
YTD
  Avg:11
14.56 in
YTD
  Diff from Avg:11
Over 4.25 in for the year 4.25 in
Last Rain
Time/Date:
Jun-28-2026
at 3:56 AM
86 rain days in 2026
14 days in June
0 days since last rain
Current: W  0.0 mph
1Hr Average: Calm
Wind Run: 0.06 miles
Wind Gust
Current: 0.0 mph
Today: 4.0 mph 1:03 PM
Month: 15.0 mph Jun-6
Year: 56.0 mph Feb-11
Record Gust: 56.0 mph
Feb-11-2026
Sunlight:
14 h 45 m 44 s
of Sunlight Yesterday
14 h 45 m 22 s
of Sunlight Today
Which is 22 sec shorter than
yesterday
14 h 44 m 56 s
of Sunlight Tomorrow
(Noon ?>) graph (Midnight
Legend

Waxing Gibbous
Waxing Gibbous, 13 days, 14 hours, 21 minutes in cycle
98%
Illuminated
Humidity Barometer
Current: Decreased 8% since last hour. 85%
Last Hour: Decreased 8% since last hour. 8%
High 11:04 AM: 95%
Low 1:09 PM: 85%
Record High: 99%
Jan-22-2017
Record Low: 0%
Mar-4-2022
Current: Falling 0.007  inHg/hr 30.895 inHg
Last Hour: Steady
High 12:32 PM: 30.911
Low 5:05 AM: 30.854
Record High: 31.946 inHg
Apr-23-2022
Record Low: 25.895 inHg
Apr-12-2021
Cooling Degree Days Lightning Strikes Heat Index Air
Today: 2.4
Jun: 154.9
2026 to Date: 251.8
Heating Degree Days
2026 to Date: 2957.9
Last Min: 0
Last 5 Mins: 0
Last 30 Mins: 0
Last 60 Mins: 0
Last 12 Hrs: 7
Jun: 2995
2026 to Date: 10595
Current: 76.9°F
High 1:14pm: 76.9°F
Yesterday: 79.6°F
Record: 127.2°F
Jun-2-2023
Quality
Index6:

28


Good
Density:
1.21 kg/m3
Current UV Index Current Solar Energy9
2.0
Sunburn in
56 Minutes
Highest:
12:59 PM
2.2
77 W/m2
8%
W/m2 SI
High Today:
12:37 PM
148  W/m2
Record:
2026 W/m2
Soil Conditions8 Irrigation Index5 Station All Time Records Cloud Level
2.4 in: 10.0 cb | 67°F
1.6 in: 5.0 cb | 68°F
0.8 in: 5.0 cb | 69°F
0.2 in: 6.0 cb | 70°F

Growing conditions
at the depth of:  0.2 in:


Soil moisture range is from
0-Wet to 200-Dry/Frozen
Updated at Midnight
Current ET: 0.04 in
7-Days Rain: 1.18 in
7-Days ET: 0.43 in
7-Day:  0.751 in water in excess of what evaporated in last 7 days. 0.751 in
June:  1.89 in water in excess of what evaporated this month. 1.89 in
HIGHS: LOWS:
99.5°F
Jun-21-2022
-12.5°F
Jan-31-2026
Daytime Records
  95.0°F°F
Jun-24-2025
  -2.6°F°F
Jan-30-2019
Nitetime Records
  84.2°F°F
Jun-23-2024
  -6.3°F°F
Jan-01-2018
ICN:18 | S3C2:4 | Ajax 3.xx
ISS:Ok | CON:4.7 | RCP:96%
METRIC | IMPERIAL
Updated: 06/28/2026 @ 1:15pm  
1 Rain season: Jan 1st to Dec 31st.   2 Snow season July 1st to June 30th.   3 Snow manually measured usually around 7AM and 7PM.   5 Estimated amount of water needed to replace the water used by plants and evaporation from the past week. (Negative numbers mean amount of water needed, positive numbers mean excess water is present).   6 Air Quality Index is provided by Minnesota Polution Control Agency and is updated hourly between the hours of 6AM and Midnight.   7 Leaf Wetness is surface moisture on foliage. 0 being totally dry and 15 being totally saturated.   8 Soil moisture and temperatures are from sensors burried in the ground at the levels specified.   9 Solar Index represents either an absolute scale of solar energy (W/m²) using the station’s recorded maximum or a percentage of computed theoretical solar maximum using the station’s location and time of day. These indices differ most when the sun is low on the horizon. The current scale is shown, and will toggle if it or the icon is clicked.   10 Historical average only to day 28 of just the month of June for this station since 2011.   11 Historical average rain this season to day 28 of June for this station since 2011.
 NWS Weather Forecast  -   Outlook Today & Tonight
Today

Today: Chance Showers And Thunderstorms
Chance Showers And T-Storms

Hi 85°F
NWS forecast: Patchy fog before 10am, then a slight chance of rain showers between 10am and 11am, then a chance of showers and thunderstorms between 11am and 2pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 85. Northeast wind around 2 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Local station forecast: Increasing clouds with little temp change.
Tonight

Tonight: Chance Showers And Thunderstorms then Partly Cloudy
Chance Showers And T-Storms then Partly Cloudy

Lo 68°F
NWS forecast: A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 68. Northeast wind around 2 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
 NWS Short Term Weather Forecast
Monday

Monday: Mostly Sunny
Mostly Sunny
Monday
Night
Monday Night: Partly Cloudy
Partly Cloudy
Tuesday

Tuesday: Sunny
Sunny
Tuesday
Night
Tuesday Night: Mostly Clear
Mostly Clear
Wednesday

Wednesday: Sunny
Sunny
Wednesday
Night
Wednesday Night: Clear
Clear
Thursday

Thursday: Sunny
Sunny
Hi 90°F Lo 73°F Hi 94°F Lo 74°F Hi 96°F Lo 75°F Hi 96°F
Script by: Scott of BurnsvilleWeatherLIVE.com
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