# NWS API: Get National Weather Service forecast

> Looks up the National Weather Service seven-day day and night forecast for a U.S. city, address, or ZIP code. Forecast availability depends on NWS land-grid coverage.

Unofficial. Not affiliated with or endorsed by NWS.

- Page: https://fous.com/methods/weather.gov/get-forecast
- Method: `weather.gov/get_forecast`, version 1
- Website: weather.gov
- Returns: matched place, forecast office, update time, grid position, coordinates, and day and night forecast periods
- Effect: read (it gets data and changes nothing)
- Sign-in: none needed
- Cost: 1 credit per completed run (1¢ with pay as you go); failed runs are free
- Verified: Nov 2, 2026

## Inputs

| Field | Type | Required | In the run below | Description |
|---|---|---|---|---|
| `units` | string | no | `"fahrenheit"` | Temperature units, such as fahrenheit or celsius. One of "fahrenheit", "celsius". Default "fahrenheit". |
| `location` | string | yes | `"Denver, CO"` | U.S. city, street address, or ZIP code, such as Denver, CO or 10001. |

## Output

From a run on Oct 23, 2026, shortened. Its input:

```json
{
  "units": "fahrenheit",
  "location": "Denver, CO"
}
```

Its output:

```json
{
  "periods": [
    {
      "name": "Overnight",
      "wind": "10 mph S",
      "end_time": "2026-10-23T06:00:00-06:00",
      "page_link": "https://forecast.weather.gov/MapClick.php?lat=39.738453&lon=-104.984853",
      "start_time": "2026-10-23T01:00:00-06:00",
      "temperature": 55,
      "short_forecast": "Chance Rain Showers",
      "temperature_unit": "F",
      "detailed_forecast": "A chance of rain showers before 3am. Cloudy. Low around 55, with temperatures rising to around 58 overnight. South wind around 10 mph, with gusts as high as 16 mph. Chance of precipitation is 30%.",
      "chance_of_precipitation_percent": 26
    },
    {
      "name": "Friday",
      "wind": "9 to 16 mph SSW",
      "end_time": "2026-10-23T18:00:00-06:00",
      "page_link": "https://forecast.weather.gov/MapClick.php?lat=39.738453&lon=-104.984853",
      "start_time": "2026-10-23T06:00:00-06:00",
      "temperature": 78,
      "short_forecast": "Mostly Sunny",
      "temperature_unit": "F",
      "detailed_forecast": "Mostly sunny. High near 78, with temperatures falling to around 76 in the afternoon. South southwest wind 9 to 16 mph, with gusts as high as 25 mph.",
      "chance_of_precipitation_percent": 4
    },
    {
      "name": "Friday Night",
      "wind": "3 to 12 mph WSW",
      "end_time": "2026-10-24T06:00:00-06:00",
      "page_link": "https://forecast.weather.gov/MapClick.php?lat=39.738453&lon=-104.984853",
      "start_time": "2026-10-23T18:00:00-06:00",
      "temperature": 48,
      "short_forecast": "Partly Cloudy",
      "temperature_unit": "F",
      "detailed_forecast": "Partly cloudy. Low around 48, with temperatures rising to around 51 overnight. West southwest wind 3 to 12 mph, with gusts as high as 18 mph.",
      "chance_of_precipitation_percent": 0
    }
  ],
  "latitude": 39.738453,
  "longitude": -104.984853,
  "update_time": "2026-10-23T06:46:33+00:00",
  "matched_place": "Denver, CO, USA",
  "forecast_office": "Denver/Boulder, CO",
  "forecast_grid_position": "BOU/63,61"
}
```

## Run it

From code, with a Fous API key in `FOUS_API_KEY`; the answer's `data` holds the output:

```bash
curl https://api.fous.com/v1/runs \
  -H "Authorization: Bearer $FOUS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"method":"weather.gov/get_forecast","input":{"units":"fahrenheit","location":"Denver, CO"}}'
```

From an AI agent connected to the Fous MCP server: its `run` with the same method and input. To connect one, give it `set up https://fous.com/SKILL.md`.

## Ask your agent

- What's the seven-day forecast for Denver, CO with day and night periods in fahrenheit?
- Can you pull up the NWS weekly forecast for ZIP code 10001 in celsius?
- I need the 7-day weather outlook for 1600 Pennsylvania Ave NW, Washington DC, including overnight lows.
- Check weather.gov for the coming week's forecast in Austin, Texas, please.
- Get me the National Weather Service day and night forecast for Portland, OR 97205 using celsius units.

## Input schema

```json
{
  "type": "object",
  "required": [
    "location"
  ],
  "properties": {
    "units": {
      "enum": [
        "fahrenheit",
        "celsius"
      ],
      "type": "string",
      "default": "fahrenheit",
      "description": "Temperature units, such as fahrenheit or celsius."
    },
    "location": {
      "type": "string",
      "minLength": 1,
      "description": "U.S. city, street address, or ZIP code, such as Denver, CO or 10001."
    }
  },
  "additionalProperties": false
}
```

## Output schema

```json
{
  "type": "object",
  "required": [
    "matched_place",
    "forecast_office",
    "update_time",
    "forecast_grid_position",
    "latitude",
    "longitude",
    "periods"
  ],
  "properties": {
    "periods": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "name",
          "start_time",
          "end_time",
          "temperature",
          "temperature_unit",
          "chance_of_precipitation_percent",
          "wind",
          "short_forecast",
          "detailed_forecast",
          "page_link"
        ],
        "properties": {
          "name": {
            "type": "string"
          },
          "wind": {
            "type": [
              "string",
              "null"
            ]
          },
          "end_time": {
            "type": "string"
          },
          "page_link": {
            "type": "string"
          },
          "start_time": {
            "type": "string"
          },
          "temperature": {
            "type": [
              "integer",
              "null"
            ]
          },
          "short_forecast": {
            "type": [
              "string",
              "null"
            ]
          },
          "temperature_unit": {
            "type": "string"
          },
          "detailed_forecast": {
            "type": [
              "string",
              "null"
            ]
          },
          "chance_of_precipitation_percent": {
            "type": [
              "integer",
              "null"
            ]
          }
        },
        "additionalProperties": false
      },
      "description": "Day and night forecast periods in time order."
    },
    "latitude": {
      "type": "number",
      "description": "Latitude of the matched place.",
      "x-fous-developer": true
    },
    "longitude": {
      "type": "number",
      "description": "Longitude of the matched place.",
      "x-fous-developer": true
    },
    "update_time": {
      "type": "string",
      "description": "Time the forecast was updated, ISO 8601 with offset."
    },
    "matched_place": {
      "type": "string",
      "description": "Matched U.S. place or address."
    },
    "forecast_office": {
      "type": "string",
      "description": "Name of the responsible National Weather Service office."
    },
    "forecast_grid_position": {
      "type": "string",
      "description": "NWS office and grid coordinates.",
      "x-fous-developer": true
    }
  },
  "additionalProperties": false
}
```

## See more

- [NWS API: Get hourly forecast](https://fous.com/methods/weather.gov/get-hourly-forecast.md): Looks up a US city, street address or ZIP code and returns up to 156 hourly National Weather Service forecasts for it.
- [NWS API: Get current conditions](https://fous.com/methods/weather.gov/get-current-conditions.md): Gets the latest observed weather from a nearby National Weather Service station for a US city, address, or ZIP code. Measurements the station does not report are null.
- [NWS API: List weather alerts](https://fous.com/methods/weather.gov/list-weather-alerts.md): Lists active US weather watches, warnings and advisories for a city, address, ZIP code or state, most severe first, then newest.
- [The Weather Channel API: Get daily forecast](https://fous.com/methods/weather.com/get-daily-forecast.md): Gets The Weather Channel's daily forecast for a city, address, ZIP code or postcode: up to 15 upcoming days with highs, lows, conditions, rain chance, wind, humidity, UV and sun times.
- [MSN API: Get forecast](https://fous.com/methods/msn.com/get-forecast.md): Gets up to 10 days of MSN Weather forecasts for a city, address, or ZIP code, with optional hourly forecasts for the next 24 hours.
- [The Weather Channel API: Get current weather](https://fous.com/methods/weather.com/get-current-weather.md): Gets current conditions and today's high and low from The Weather Channel for a city, postcode, ZIP code or street address worldwide. Street addresses are geocoded exactly first; some observations omit gusts or other measurements.
- [AccuWeather API: Get current weather](https://fous.com/methods/accuweather.com/get-current-weather.md): Gets current conditions and RealFeel for a city or postal code on AccuWeather. The UV level follows standard UV-index ranges. Air quality is null unless it is shown with the current conditions.
- [MSN API: Get current weather](https://fous.com/methods/msn.com/get-current-weather.md): Gets current MSN Weather conditions for a city, address or ZIP code. The place is found through OpenStreetMap Nominatim. Matches for broad searches are approximate.
- [All NWS methods](https://fous.com/methods/weather.gov.md)