Feels Like Temperature Calculator
Enter air temperature, humidity, and wind speed to calculate heat index or wind chill.
Results are planning references for outdoor activity. Sun exposure, clothing, activity, and health can change how the weather actually feels.
Weather inputs
Auto select checks temperature, humidity, and wind speed before choosing an applicable method.
Weather examples
Feels-like result
Estimated feels like
38.7°C
Air temperature 32.0°C · Difference +6.7°C
Method used
Heat Index
Temperature and humidity meet the Heat Index application conditions.
Values used
Reference status
Extreme caution
Heat illness is possible with prolonged exposure or activity; reduce outdoor intensity.
This is an input-based reference level, not an official weather alert.
Usage Tips
Check the apparent temperature before the air temperature
The same 30°C day can feel much hotter when humidity is high, and a freezing day can feel colder when the wind is strong. Before outdoor exercise, commuting, or travel plans, check humidity and wind speed together with the air temperature to understand how the weather will actually feel.
What is Feels Like Temperature Calculator?
The Feels Like Temperature Calculator estimates apparent temperature from air temperature, humidity, and wind speed. It selects a heat-index, wind-chill, or reference result for outdoor planning and does not diagnose personal health risk.
How to Use
- 1 Choose Auto, Heat index, or Wind chill mode.
- 2 Use temperature, humidity, and wind for Auto; temperature and humidity for Heat Index; or temperature and wind for Wind Chill.
- 3 Review the difference from air temperature, method, and reference status, then copy.
Choose heat index or wind chill by its input conditions
Last reviewed: August 1, 2026Feels-like temperature flow
heat feel = NWS simple estimate → Heat Index regression; cold feel = 13.12 + 0.6215T − 11.37V^0.16 + 0.3965TV^0.16
The NWS Heat Index sequence applies the Rothfusz regression when the average of the simple estimate and air temperature reaches 80°F. Wind Chill uses Celsius temperature T and km/h wind V at or below 10°C with wind above 3mph (about 4.8km/h); unsupported conditions remain an air-temperature reference.
A hot 35°C day with 70% humidity
- • Temperature 35°C
- • Humidity 70%
- • Automatic mode
- 1. Convert 35°C to 95°F and meet the Heat Index condition
- 2. The calculated feel is about 50.34°C and the method is heat
At 35°C and 70% humidity, the tool uses Heat Index and reports a feel of about 50.34°C.
How to read the result
- High humidity slows sweat evaporation, while strong wind can increase heat loss in cold conditions.
- Automatic mode chooses heat, cold, or reference based on the supplied weather conditions.
Conditions that change the result
- Heat reference levels use 80°F, 90°F, 103°F, and 125°F boundaries; Wind Chill applies at or below 10°C with wind above 3mph (about 4.8km/h).
- Clothing, direct sun, exercise, and health status can change how the same value feels, and the reference status is not an official weather alert.
Common input mistakes
- Do not force a heat formula on a cold windy day or a wind-chill formula on a hot humid day.
- A feels-like value is not a personal diagnosis of heat illness or hypothermia risk.
Reference Knowledge
- ● Feels-like temperature can change depending on humidity and wind speed.
- ● Heat feels-like temperature references Heat Index formula methods widely used by NOAA/National Weather Service.
- ● Cold feels-like temperature references Wind Chill formula methods used by National Weather Service.
- ● The Heat Index follows the NWS sequence by checking the simple estimate before applying the Rothfusz regression when its threshold is met.
- ● When conditions fall outside the formula range, the calculator shows a reference value close to the actual air temperature instead of forcing the formula.
- ● On hot days, high humidity can reduce sweat evaporation and make the air feel hotter.
- ● On cold days, stronger wind removes heat from the skin faster and makes it feel colder.
- ● Heat Index represents shade and light-wind conditions; direct sun can make it feel up to about 15°F hotter.
- ● The result and status level are planning references, not an official weather alert or personal health diagnosis.
FAQ
Q. How do I use the feels-like temperature calculator?
Auto mode uses temperature, humidity, and wind. Heat Index uses temperature and humidity, while Wind Chill uses temperature and wind.
Q. Why does humidity matter?
On hot days, high humidity makes it harder for sweat to evaporate, so the air can feel hotter.
Q. Why does wind speed matter?
On cold days, wind removes heat from the skin faster, making the air feel colder.
Q. Are heat index and wind chill calculated differently?
Yes. Heat index mainly uses temperature and humidity, while wind chill mainly uses temperature and wind speed.
Q. Can the result differ from a weather app?
Yes. Weather apps may use different formulas, observation data, or local conditions, so this calculator is best used as a reference.
Q. Is the reference status an official weather alert?
No. It is an input-based reference level using NWS formula ranges. Check the relevant weather authority for official alerts.
