Heat Waves

Unless otherwise noted, the real-time data on this page are provided in the public domain by NOAA, the National Weather Service, the Climate Prediction Center, and the Weather Prediction Center. The images below are clickable, and you will be directed to the original source for more information.

Disclaimer: The information provided in this page is for general situational awareness and amateur forecasting purposes only and should not supersede the information provided by local officials during life-or-death situations. Reload this page for the latest updates.

QUICK LINKS: Situational Awareness | High Temperature Forecasts (Day 1-6) | Extended Heat Index Forecasts (Day 3-14)

Situational Awareness



San Diego




New York



Current Air Temperature

Data from surface station observations. Updated hourly.

Current temperature maps courtesy of the Oklahoma Mesonet.

Current Apparent Air Temperature

Data from surface station observations. Updated hourly.

NWS apparent temperature charts: Heat Index and Wind Chill


Yesterday’s Normal High Temperature

Yesterday’s Actual High Temperature

Yesterday’s temperature maps courtesy of Penn State e-Wall.


Today’s Ultraviolet Radiation Index

More information: CPC UV Index

Today’s Ultraviolet Radiation Alerts

More information: CPC Experimental UV Alerts

High Temperature Forecasts (Day 1-6)


Forecast Highs (Day 1)

Forecast Highs (Day 2)

Forecast Highs (Day 3)

Forecast Highs (Day 4)

Forecast Highs (Day 5)

Forecast Highs (Day 6)

Extended Heat Index Forecasts (Day 3-14)


Forecast Max Heat Index (Day 3)

Forecast Max Heat Index (Day 4)

Forecast Max Heat Index (Day 5)

Forecast Max Heat Index (Day 6)


Heat Index Outlook (Day 6-10)


Heat Index Outlook (Day 8-14)

More maps: WPC Heat Index Forecasts