# Weather Codes

When you request the `weather` field group (`include=weather`), every time-series row includes a
`weather_code`. It describes the weather conditions at the site for that interval.

| Code       | Description                                          |
|------------|------------------------------------------------------|
| 0          | Clear sky                                            |
| 1, 2, 3    | Mainly clear, partly cloudy, overcast                |
| 45, 48     | Fog and depositing rime fog                          |
| 51, 53, 55 | Drizzle: light, moderate, dense                      |
| 56, 57     | Freezing drizzle: light and dense                    |
| 61, 63, 65 | Rain: slight, moderate, heavy                        |
| 66, 67     | Freezing rain: light and heavy                       |
| 71, 73, 75 | Snowfall: slight, moderate, heavy                    |
| 77         | Snow grains                                          |
| 80, 81, 82 | Rain showers: slight, moderate, violent              |
| 85, 86     | Snow showers: slight and heavy                       |
| 95         | Thunderstorm                                         |
| 96, 99     | Thunderstorm with slight and heavy hail              |

:::note
`weather_code` is part of the `weather` field group and is not returned by default. Add
`include=weather` to your request — see the [Forecasts](/en/v2/api/forecast) and
[Historical Data](/en/v2/api/historical) pages. Daily aggregates report the dominant weather code
of the day.
:::