Miami - South Florida

Weather Forecast Office

Heat Forecast Page

NWS Miami Heat Webpage
Visit Heat.Gov for Additional Heat Resources

These graphics are updated at least once per day, shortly after 4 AM Eastern Time.
They can be magnified (enlarged) by left clicking on them, and resized back to original size with a second click.

South Florida's Expected Heat Indices Today

Please see county-specific tabs above for additional graphics.

What is Heat Index?

The Heat Index is a measure of how hot it really feels when relative humidity is factored in with the actual air temperature. To find the Heat Index temperature, look at the Heat Index Chart below or check our Heat Index Calculator. As an example, if the air temperature is 96°F and the relative humidity is 65%, the heat index--how hot it feels--is 121°F. The red area without numbers indicates extreme danger. The National Weather Service will initiate alert procedures when the Heat Index is expected to exceed 105°-110°F (depending on local climate) for at least 2 consecutive days.

NWS also offers a Heat Index chart for areas with high heat but low relative humidity. Since heat index values were devised for shady, light wind conditions, exposure to full sunshine can increase heat index values by up to 15°F. Also, strong winds, particularly with very hot, dry air, can be extremely hazardous.

What is Wet Globe Temperature?

What is Wet Bulb Globe Temperature (WBGT)? Check out this handout and video to learn about WBGT.

WBGT uses temperature, humidity, wind, solar radiation, and other weather parameters. It’s a particularly effective indicator of heat stress for active populations such as outdoor workers and athletes.

WBGT can be used to inform activity modifications during exercise or outdoor work. For instance, The American College of Sports Medicine bases its guidelines for the intensity of sport practices on WBGT, and it is therefore utilized by athletic programs in many school districts.

The Occupational Safety and Health Administration (OSHA) recommends protective measures for outdoor work:

Acclimatize workers starting the first day working in the heat and after any extended absences
Provide shade for outdoor work sites
Schedule work earlier or later in the day
Use work/rest schedules
Limit strenuous work (eg., carrying heavy loads)
Use relief workers when needed

For more information:

Expected Heat Index (℉) for Miami-Dade County

These maps are the official NWS heat index temperature forecast in degrees Fahrenheit during the time period shown on the graphic. These heat index values are determined by NWS forecasters to be the most likely outcome based on evaluation of data from computer models, satellite, radar, and other observations.

Day 1	Day 2	Day 3	Day 4
Day 5

Wet Bulb Globe Temperature Risk for Miami-Dade County

The Wet Bulb Globe Temperature (WBGT) is an indicator of heat related stress on the human body at work (or play) in direct sunlight. It takes into account multiple atmospheric variables, including: temperature, humidity, wind speed, sun angle, and cloud cover. Military agencies, OSHA, activities associations and many others use the WBGT Risk as a guide to managing workload or activity level. These graphics don't depict the actual WBGT forecast, but rather will depict the associated risk level for each given time period.

Day 1	Day 2	Day 3	Day 4
Day 5

Expected Heat Index (℉) for Broward County

These maps are the official NWS heat index temperature forecast in degrees Fahrenheit during the time period shown on the graphic. These heat index temperatures are determined by NWS forecasters to be the most likely outcome based on evaluation of data from computer models, satellite, radar, and other observations.

Day 1	Day 2	Day 3	Day 4
Day 5

Wet Bulb Globe Temperature Risk for Broward County

The Wet Bulb Globe Temperature (WBGT) is an indicator of heat related stress on the human body at work (or play) in direct sunlight. It takes into account multiple atmospheric variables, including: temperature, humidity, wind speed, sun angle, and cloud cover. Military agencies, OSHA, activities associations and many others use the WBGT Risk as a guide to managing workload or activity level. These graphics don't depict the actual WBGT forecast, but rather will depict the associated risk level for each given time period.

Day 1	Day 2	Day 3	Day 4
Day 5

Expected Heat Index (℉) for Palm Beach County

These maps are the official NWS heat index temperature forecast in degrees Fahrenheit during the time period shown on the graphic. These heat index temperatures are determined by NWS forecasters to be the most likely outcome based on evaluation of data from computer models, satellite, radar, and other observations.

Day 1	Day 2	Day 3	Day 4
Day 5

Wet Bulb Globe Temperature Risk for Palm Beach County

The Wet Bulb Globe Temperature (WBGT) is an indicator of heat related stress on the human body at work (or play) in direct sunlight. It takes into account multiple atmospheric variables, including: temperature, humidity, wind speed, sun angle, and cloud cover. Military agencies, OSHA, activities associations and many others use the WBGT Risk as a guide to managing workload or activity level. These graphics don't depict the actual WBGT forecast, but rather will depict the associated risk level for each given time period.

Day 1	Day 2	Day 3	Day 4
Day 5

Expected Heat Index (℉) for Collier County

These maps are the official NWS heat index temperature forecast in degrees Fahrenheit during the time period shown on the graphic. These heat index temperatures are determined by NWS forecasters to be the most likely outcome based on evaluation of data from computer models, satellite, radar, and other observations.

Day 1	Day 2	Day 3	Day 4
Day 5

Wet Bulb Globe Temperature Risk for Collier County

The Wet Bulb Globe Temperature (WBGT) is an indicator of heat related stress on the human body at work (or play) in direct sunlight. It takes into account multiple atmospheric variables, including: temperature, humidity, wind speed, sun angle, and cloud cover. Military agencies, OSHA, activities associations and many others use the WBGT Risk as a guide to managing workload or activity level. These graphics don't depict the actual WBGT forecast, but rather will depict the associated risk level for each given time period..

Day 1	Day 2	Day 3	Day 4
Day 5

Expected Heat Index (℉) for Hendry County

These maps are the official NWS heat index temperature forecast in degrees Fahrenheit during the time period shown on the graphic. These heat index temperatures are determined by NWS forecasters to be the most likely outcome based on evaluation of data from computer models, satellite, radar, and other observations.

Day 1	Day 2	Day 3	Day 4
Day 5

Wet Bulb Globe Temperature Risk for Hendry County

The Wet Bulb Globe Temperature (WBGT) is an indicator of heat related stress on the human body at work (or play) in direct sunlight. It takes into account multiple atmospheric variables, including: temperature, humidity, wind speed, sun angle, and cloud cover. Military agencies, OSHA, activities associations and many others use the WBGT Risk as a guide to managing workload or activity level. These graphics don't depict the actual WBGT forecast, but rather will depict the associated risk level for each given time period..

Day 1	Day 2	Day 3	Day 4
Day 5

Expected Heat Index (℉) for Glades County

These maps are the official NWS heat index forecast in degrees Fahrenheit during the time period shown on the graphic. These heat index temperatures are determined by NWS forecasters to be the most likely outcome based on evaluation of data from computer models, satellite, radar, and other observations.

Day 1	Day 2	Day 3	Day 4
Day 5

Wet Bulb Globe Temperature Risk for Glades County

The Wet Bulb Globe Temperature (WBGT) is an indicator of heat related stress on the human body at work (or play) in direct sunlight. It takes into account multiple atmospheric variables, including: temperature, humidity, wind speed, sun angle, and cloud cover. Military agencies, OSHA, activities associations and many others use the WBGT Risk as a guide to managing workload or activity level. These graphics don't depict the actual WBGT forecast, but rather will depict the associated risk level for each given time period.

Day 1	Day 2	Day 3	Day 4
Day 5

Expected 12 Hour Rainfall (in.)

These maps are the official NWS rainfall forecast in inches during the time period shown on the graphic. These rainfall amounts are determined by NWS forecasters to be the most likely outcome based on evaluation of data from computer models, satellite, radar, and other observations.

Day 1	Night 1	Day 2	Night 2
Day 3	Night 3	Day 4	Night 4
Day 5	Night 5	Day 6	Night 6
Day 7	Night 7

Greatest 12 Hour Possible Rainfall (in.)

These maps depict a reasonable upper-end rainfall amount for the time period shown on the graphic, based on many computer model simulations of possible rainfall totals. These higher amounts are an unlikely scenario, with only a 1 in 10, or 10% chance that more rain will fall, and a 9 in 10, or 90% chance that less rain will fall. These amounts can help serve as an upper-end scenario for planning purposes.

Day 1	Night 1	Day 2	Night 2
Day 3	Night 3	Day 4	Night 4
Day 5	Night 5	Day 6	Night 6
Day 7	Night 7

Least Possible 12 Hour Rainfall (in.)

These maps depict a reasonable lower-end rainfall amount for the time period shown on the graphic, based on many computer model simulations of possible rainfall totals. These lower amounts are an unlikely scenario, with a 9 in 10, or 90% chance that more rain will fall, and only a 1 in 10, or 10% chance that less rain will fall. These amounts can help serve as a lower-end scenario for planning purposes. On many occasions these graphics will be blank, which depicts that the low end is for no measurable rainfall.

Day 1	Night 1	Day 2	Night 2
Day 3	Night 3	Day 4	Night 4
Day 5	Night 5	Day 6	Night 6
Day 7	Night 7

Expected 24 Hour Rainfall (in.)

These maps are the official NWS rainfall forecast in inches during the time period shown on the graphic. These rainfall amounts are determined by NWS forecasters to be the most likely outcome based on evaluation of data from computer models, satellite, radar, and other observations.

Day 1	Day 2	Day 3	Day 4
Day 5	Day 6	Day 7

Greatest 24 Hour Possible Rainfall (in.)

These maps depict a reasonable upper-end rainfall amount for the time period shown on the graphic, based on many computer model simulations of possible rainfall totals. These higher amounts are an unlikely scenario, with only a 1 in 10, or 10% chance that more rain will fall, and a 9 in 10, or 90% chance that less rain will fall. These amounts can help serve as an upper-end scenario for planning purposes.

Day 1	Day 2	Day 3	Day 4
Day 5	Day 6	Day 7

Least Possible 24 Hour Rainfall (in.)

These maps depict a reasonable lower-end rainfall amount for the time period shown on the graphic, based on many computer model simulations of possible rainfall totals. These lower amounts are an unlikely scenario, with a 9 in 10, or 90% chance that more rain will fall, and only a 1 in 10, or 10% chance that less rain will fall. These amounts can help serve as a lower-end scenario for planning purposes. On many occasions these graphics will be blank, which depicts that the low end is for no measurable rainfall.

Day 1	Day 2	Day 3	Day 4
Day 5	Day 6	Day 7

Expected Rainfall (in.)

These maps are the official NWS rainfall forecast in inches during the time period shown on the graphic. These rainfall amounts are determined by NWS forecasters to be the most likely outcome based on evaluation of data from computer models, satellite, radar, and other observations.

Day 1-2	Day 1-3	Day 1-5	Day 1-7
Day 2-3	Day 3-4	Day 4-5	Day 6-7

Greatest Possible Rainfall (in.)

These maps depict a reasonable upper-end rainfall amount for the time period shown on the graphic, based on many computer model simulations of possible rainfall totals. These higher amounts are an unlikely scenario, with only a 1 in 10, or 10% chance that more rain will fall, and a 9 in 10, or 90% chance that less rain will fall. These amounts can help serve as an upper-end scenario for planning purposes.

Day 1-2	Day 1-3	Day 1-5	Day 1-7
Day 2-3	Day 3-4	Day 4-5	Day 6-7

Least Possible Rainfall (in.)

These maps depict a reasonable lower-end rainfall amount for the time period shown on the graphic, based on many computer model simulations of possible rainfall totals. These lower amounts are an unlikely scenario, with a 9 in 10, or 90% chance that more rain will fall, and only a 1 in 10, or 10% chance that less rain will fall. These amounts can help serve as a lower-end scenario for planning purposes. On many occasions these graphics will be blank, which depicts that the low end is for no measurable rainfall.

Day 1-2	Day 1-3	Day 1-5	Day 1-7
Day 2-3	Day 3-4	Day 4-5	Day 6-7