The Weather Channel Real Feel Temperature Calculation
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Reviewed by Calculator Editorial Team
The Weather Channel's RealFeel temperature is a more accurate representation of how hot or cold it feels to the human body, taking into account factors like wind, humidity, and sun exposure. This calculation helps provide a more intuitive understanding of weather conditions than the standard temperature reading.
How RealFeel Works
RealFeel temperature is calculated using a proprietary algorithm developed by The Weather Channel. This algorithm considers multiple environmental factors that affect human perception of temperature, including:
- Air temperature
- Humidity levels
- Wind speed
- Sun exposure
- Precipitation
The algorithm combines these factors to produce a single number that represents what the temperature "feels like" to the average person. This is particularly useful for planning outdoor activities, travel, and daily life decisions.
RealFeel temperature is not an official meteorological standard but rather a proprietary calculation used by The Weather Channel to provide more intuitive weather information.
The Formula
The exact formula used by The Weather Channel is proprietary and not publicly disclosed. However, we can describe the general approach:
RealFeel = f(T, RH, WS, S, P)
Where:
- T = Air temperature (°F or °C)
- RH = Relative humidity (%)
- WS = Wind speed (mph or km/h)
- S = Sun exposure (W/m²)
- P = Precipitation (mm or inches)
The function f() combines these variables using a complex algorithm that accounts for their relative importance in different weather conditions. The algorithm is designed to match human perception studies and field observations.
Interpreting RealFeel
RealFeel temperatures are typically presented alongside the actual temperature. Here's how to interpret the difference:
| Difference | Meaning |
|---|---|
| RealFeel higher than actual temperature | Feels warmer than the actual temperature (e.g., high humidity) |
| RealFeel lower than actual temperature | Feels cooler than the actual temperature (e.g., wind chill effect) |
| RealFeel close to actual temperature | Feels similar to the actual temperature (comfortable conditions) |
For example, if the actual temperature is 75°F (24°C) but the RealFeel is 82°F (28°C), it feels significantly warmer due to high humidity. Conversely, if the actual temperature is 32°F (0°C) but the RealFeel is 25°F (-4°C), it feels much colder due to wind.
Example Calculation
Let's look at an example where:
- Actual temperature: 78°F (25.6°C)
- Humidity: 65%
- Wind speed: 5 mph (8 km/h)
- Sun exposure: Moderate (500 W/m²)
- Precipitation: None
Using The Weather Channel's algorithm (simplified for illustration), the calculation might proceed as follows:
- Adjust for humidity: +3°F (1.7°C)
- Adjust for wind: -1°F (-0.6°C)
- Adjust for sun: +2°F (1.1°C)
- Final RealFeel: 78 + 3 - 1 + 2 = 82°F (27.8°C)
In this example, the RealFeel temperature of 82°F (27.8°C) indicates that the conditions feel significantly warmer than the actual temperature of 78°F (25.6°C).
Frequently Asked Questions
What is the difference between RealFeel and heat index?
The Weather Channel's RealFeel temperature is similar to the heat index but considers more factors than just temperature and humidity. RealFeel also accounts for wind, sun exposure, and precipitation, providing a more comprehensive representation of how weather conditions feel to the human body.
Is RealFeel temperature an official standard?
No, RealFeel temperature is a proprietary calculation developed by The Weather Channel. It is not an official meteorological standard but is widely used to provide more intuitive weather information.
How accurate is RealFeel temperature?
RealFeel temperature is designed to match human perception studies and field observations. While it provides a more intuitive representation of weather conditions, it should be used as a guide rather than a precise scientific measurement.
Can RealFeel temperature be negative?
Yes, RealFeel temperature can be negative, especially in cold weather conditions with high wind speeds. In such cases, the RealFeel temperature will be lower than the actual temperature due to the wind chill effect.