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Heat Advisory HEAT ADVISORY - Lehigh Valley

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METRIC | IMPERIAL
Updated: 14-Jul-2026 @ 7:35pm   (0 sec ago)
Temperature Current Conditions Forecast / Storm Prediction
Currently Outside: Colder 1.7°F than last hour.

86.8°F

Heat Index:  91.4°F
Warm
High Today
90.8°F
4:48 PM 		Low Today
64.7°F
5:10 AM
Yest High
85.5°F
5:15 PM 		Yest Low
61.3°F
5:48 AM
Sta* High
94.0°F
2016 		Sta* Low
32.0°F
2014
* This Station's Records Since 06/2011
Sunny, Dry Sunny, Dry

Wind from W Wind:  W
5.9
Gusting to:
 6.0 mph
Current Rain Rain:
0.00in
Chandler Burning Index: LOW Current CBI
Fire Danger:
13.7 of 100
Tonight

Tonight: Mostly Clear
Mostly Clear
Wednesday

Wednesday: Mostly Sunny then Slight Chance Showers And Thunderstorms
Mostly Sunny then Slight Chance Showers And T-Storms
Wednesday
Night
Wednesday Night: Slight Chance Showers And Thunderstorms then Partly Cloudy
Slight Chance Showers And T-Storms then Partly Cloudy
Lo 74°F Hi 97°F Lo 71°F
SPC Activity Map
Dew Point Liquid Precipitation Wind Speed Sun/Moon
Current: Decreased 0.5°F since last hour. 69.7°F
Last Hour: Decreased 0.5°F since last hour. 0.5°F
High 2:09 PM: 73.1°F
Low 1:54 AM: 59.3°F
Record High: 81.1°F on
27-Jul-2023
Record Low: -19.8°F on
7-Jan-2014
Wetbulb: 75.3°F
Rain Today
rain graph
Today: 0.00in
Yesterday: 0.00in
Last 7 Days: 0.07in
Jul Rain: 1.55in
Jul to Date
  Avg:10 		0.00in
Jul to Date
  Diff from Avg:10 		Over 1.55in for the month 1.55in
Jul Avg: 4.95in
Diff from Avg: Under 3.4in for the month 3.40in
Season:1 14.31in
YTD
  Avg:11 		21.13in
YTD
  Diff from Avg:11 		Under 6.82in for the year 6.82in
Last Rain
Time/Date: 		10-Jul-2026
at 11:32 PM
81 rain days in 2026
7 days in July
3 days since last rain
Current: W  5.9mph
1Hr Average: 5.1mph
Wind Run: 73.14 miles
Wind Gust
Current: 6.0mph
Today: 18.4mph 5:04 PM
Month: 46.0mph 3-Jul
Year: 49.0mph 7-Feb
Record Gust: 53.0mph
19-Dec-2025
Sunlight:
14 hrs 51 min
21 sec
of Sunlight Today Which is
1 min 19 sec shorter than
yesterday
 (Noon) graph (Midnight)

Waxing Crescent
Waxing Crescent, 0 days, 13 hours, 52 minutes in cycle
0%
Illuminated
Humidity Barometer
Current: Increased 2% since last hour. 57%
Last Hour: Increased 2% since last hour. 2%
High 5:18 AM: 86%
Low 4:39 PM: 48%
Record High: 100%
30-May-2011
Record Low: 0%
31-Jul-2015
Current: Falling 0.006 inHg/hr 29.970inHg
Last Hour: Steady
High 12:03 AM: 30.163
Low 6:56 PM: 29.969
Record High: 30.933inHg
14-Dec-2024
Record Low: 28.860inHg
7-Feb-2020
Cooling Degree Days Snow3 Heat Index Air
Today: 5.6
Jul: 162.3
2026 to Date: 456.0
Heating Degree Days
2026 to Date: 3393.9
Today: 0.00in
Yesterday: 0.00in
Jul Snow: No Change 0.00in
Jul Avg: 0.00in
Diff from Avg: 0.00in
Season Total:2 16.80in
Snow Depth: 0.00in
0 snow days in July
1 snow day this season.2
Average 1st Snow:
0
Current: 91.4°F
High 5:18pm: 97.0°F
Yesterday: 87.8°F
Record: 114.6°F
2-Jul-2026
Quality
Index6:
101

Unhealthy for Sensitive Groups
Current UV Index Current Solar Energy
0.0
Sunburn in
720 Minutes 		Highest:
1:17 PM
5.1
85 W/m2
98%
W/m2 ⇒ SI Solar % ⇒ SI 		High Today:
12:40 PM
 787  W/m2
Record:
1363 W/m2
Almanac Irrigation Index5 Station All Time Records Cloud Level
Currently: Evening
YTD Avg Temp: 49.9°F
Sunrise: 5:43 am
Sunset: 8:33 pm
Moonrise: 5:36 am
Moonset: 8:17 pm
Full Moon: 29-Jul-2026
New Moon: 17:37 UTC
12-Aug-2026
Updated at Midnight
Current ET: 0.29in
7-Days Rain: 0.07in
7-Days ET: 1.09in
7-Day: 1.024in water in deficit of what evaporated in last 7 days. 1.024in
July: 0.35in water in deficit of what evaporated this month. 0.35in
HIGHS: LOWS:
102.3°F
2-Jul-2026 		-6.2°F
31-Jan-2019
Daytime Records
  95.2°F°F
03-Jul-2018 		  6.1°F°F
07-Jan-2014
Nitetime Records
  86.0°F°F
03-Jul-2026 		  -0.4°F°F
31-Jan-2019
ICN:18 | S3C2:1 | Ajax 3.xx
ISS:Ok | CON:4.7 | RCP:99%
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.   10 Historical average only to day 14 of just the month of July for this station since 2011.   11 Historical average rain this season to day 14 of July for this station since 2011.
 NWS Weather Forecast  -   Outlook Tonight & Wednesday
Tonight

Tonight: Mostly Clear
Mostly Clear

Lo 74°F 		NWS forecast: Mostly clear, with a low around 74. West wind around 10 mph.
Local station forecast: Mostly cloudy with little temp change, precipitation likely. 		Wednesday

Wednesday: Mostly Sunny then Slight Chance Showers And Thunderstorms
Mostly Sunny then Slight Chance Showers And T-Storms

Hi 97°F 		NWS forecast: A slight chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 97. Heat index values as high as 102. West wind 5 to 10 mph, with gusts as high as 25 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
 NWS Short Term Weather Forecast
Wednesday
Night
Wednesday Night: Slight Chance Showers And Thunderstorms then Partly Cloudy
Slight Chance Showers And T-Storms then Partly Cloudy
Thursday

Thursday: Mostly Sunny
Mostly Sunny
Thursday
Night
Thursday Night: Mostly Clear
Mostly Clear
Friday

Friday: Mostly Sunny
Mostly Sunny
Friday
Night
Friday Night: Slight Chance Rain Showers then Chance Showers And Thunderstorms
Slight Chance Rain Showers then Chance Showers And T-Storms
Saturday

Saturday: Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
Chance Showers And T-Storms then Showers And T-Storms Likely
Saturday
Night
Saturday Night: Showers And Thunderstorms Likely
Showers And T-Storms Likely
Lo 71°F Hi 93°F Lo 68°F Hi 89°F Lo 66°F Hi 86°F Lo 68°F
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