Unit System
The API allows specifying the units of returned data through the unit parameter.
| Unit System/Element | SI Scientific System | imperial Imperial | metric:v1 Metric V1 | metric:v2 Metric V2 | metric Default Metric |
|---|---|---|---|---|---|
| Actual Precipitation | Meter/second (meter/sec) | Inches/hour (in/hr) | Radar precipitation intensity (0~1) | Millimeters/hour (mm/hr) | Radar precipitation intensity (0~1) |
| Minute-by-Minute Forecast Precipitation | Meter/second (meter/sec) | Inches/hour (in/hr) | Radar precipitation intensity (0~1) | Millimeters/hour (mm/hr) | Radar precipitation intensity (0~1) |
| Hourly Forecast Precipitation | Meter/second (meter/sec) | Inches/hour (in/hr) | Radar precipitation intensity (0~1) | Millimeters/hour (mm/hr) | Millimeters/hour (mm/hr) |
| Daily Forecast Precipitation | Meter/second (meter/sec) | Inches/hour (in/hr) | Radar precipitation intensity (0~1) | Millimeters/hour (mm/hr) | Millimeters/hour (mm/hr) |
| Distance | Meter (m) | Miles (mi) | Kilometers (km) | Kilometers (km) | Kilometers (km) |
| Temperature | Kelvin (K) | Fahrenheit (℉) | Celsius (℃) | Celsius (℃) | Celsius (℃) |
| Pressure | Pascal (Pa) | Pascal (Pa) | Pascal (Pa) | Pascal (Pa) | Pascal (Pa) |
| Relative Humidity | 0~1 | 0~1 | 0~1 | 0~1 | 0~1 |
| Wind Direction | Radians | Clockwise from north (0~360°) | Clockwise from north (0~360°) | Clockwise from north (0~360°) | Clockwise from north (0~360°) |
| Wind Speed | Meters/second (m/s) | Miles/hour (mi/hr) | Kilometers/hour (km/hr) | Kilometers/hour (km/hr) | Kilometers/hour (km/hr) |
| Cloud Cover | 0~1 | 0~1 | 0~1 | 0~1 | 0~1 |
| Visibility | Meter (m) | Miles (mi) | Kilometers (km) | Kilometers (km) | Kilometers (km) |