---
updatedAt: 2025-02-19T23:47:14.000Z
agentTools:
  projectIndex: https://apidocs.tempestwx.com/llms.txt
---

# Default Units

When not specified, the Tempest API endpoints return data in our default units.  The default units for each parameter are listed below.

| Parameter       | Default Units           |
| :-------------- | :---------------------- |
| Temperature     | Celsius                 |
| Pressure        | Millibars               |
| Wind            | Meters per second (m/s) |
| Distance        | Kilometers              |
| Brightness      | Lux                     |
| Solar Radiation | W/m²                    |