Daily Historical Weather at a Point in North America (Daymet)

daymet/daily-point-weather

Daily surface weather for one latitude and longitude in North America, from the Daymet 1 km gridded dataset (Version 4 R1): maximum and minimum temperature in degrees Celsius, precipitation, shortwave radiation, vapor pressure, snow water equivalent and day length, for every day between a start and an end date. Covers 1980 to the latest full calendar year, with latitude 14.5 to 52.0 and longitude -131.0 to -53.0 only. Returns parallel arrays (year, day of year, one array per variable with its unit in the key), the point's elevation and the dataset citation. The response grows with the range and the variables (1980 to now of all seven is about 1.9 MB): ask for a few years at a time. Daymet data are provisional and subject to revision. Daymet data from the ORNL DAAC, served by Eden Engine; not an official ORNL or NASA product.

activeper callv1

Price

$0.0026 per call

You pay the price shown. If a call turns out to cost more than its quote, you pay the actual price, capped at twice the quote. No monthly minimum. Top-ups start at $5.

Data source

ORNL DAAC (Oak Ridge National Laboratory Distributed Active Archive Center)

Daymet data from the ORNL DAAC. How to cite: Thornton, M.M., R. Shrestha, Y. Wei, P.E. Thornton, S-C. Kao, and B.E. Wilson. 2022. Daymet: Daily Surface Weather Data on a 1-km Grid for North America, Version 4 R1. ORNL DAAC, Oak Ridge, Tennessee, USA. https://doi.org/10.3334/ORNLDAAC/2129. Daymet data are provisional and subject to revision. Served by Eden Engine; not an official ORNL DAAC product.

Use it

Five steps: search, inspect, learn, run, settle. No per-tool setup; your agent reaches this tool through the meta-tools it already has.

Connect once and your AI can find and run this tool, and any other it needs.

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agent

// 1. search: find the tool
omnial_search({ query: "what you need" })

// 2. inspect: price and input schema
omnial_inspect({ tool: "daymet/daily-point-weather" })

// 3. learn: read the usage guide at runtime
omnial_learn({ tool: "daymet/daily-point-weather" })

// 4. run: price the exact call first, then run it
omnial_execute({ tool: "daymet/daily-point-weather", input: { /* see input_schema */ }, dry_run: true })
omnial_execute({ tool: "daymet/daily-point-weather", input: { /* ... */ } })

// 5. settle: the call is charged when it finishes, nothing to do

Not connected yet? Point your MCP client at https://mcp.eden-engine.com/mcp, then copy a config for your client.

Pricing

Every charge this tool can incur.

Charge	Price
Per call	$0.0026

Updated: Oct 20, 2026

Input and output schemas

Input schema

input_schema.json

{
  "type": "object",
  "required": [
    "latitude",
    "longitude",
    "start",
    "end"
  ],
  "properties": {
    "end": {
      "type": "string",
      "pattern": "^(19[89][0-9]|20[0-9]{2})-(0[1-9]|1[0-2])-(0[1-9]|[12][0-9]|3[01])$",
      "description": "Last day to return, ISO 8601 date YYYY-MM-DD. The data end with the latest full calendar year."
    },
    "vars": {
      "type": "string",
      "default": "tmax,tmin,prcp",
      "pattern": "^(tmax|tmin|srad|vp|swe|prcp|dayl)(,(tmax|tmin|srad|vp|swe|prcp|dayl)){0,6}$",
      "description": "Variables to return, comma separated with no spaces: tmax maximum temperature, tmin minimum temperature, prcp precipitation, srad shortwave radiation, vp vapor pressure, swe snow water equivalent, dayl day length. Defaults to tmax,tmin,prcp."
    },
    "start": {
      "type": "string",
      "pattern": "^(19[89][0-9]|20[0-9]{2})-(0[1-9]|1[0-2])-(0[1-9]|[12][0-9]|3[01])$",
      "description": "First day to return, ISO 8601 date YYYY-MM-DD. The data begin in 1980."
    },
    "latitude": {
      "type": "number",
      "maximum": 52,
      "minimum": 14.5,
      "description": "Latitude in decimal degrees, north positive, between 14.5 and 52.0 (Oak Ridge, Tennessee is 35.96)."
    },
    "longitude": {
      "type": "number",
      "maximum": -53,
      "minimum": -131,
      "description": "Longitude in decimal degrees, west negative, between -131.0 and -53.0 (Oak Ridge, Tennessee is -84.29)."
    }
  },
  "additionalProperties": false
}

Output schema

output_schema.json

{
  "type": "object",
  "required": [
    "loc",
    "data"
  ],
  "properties": {
    "LCC": {
      "type": "array",
      "items": {
        "type": "number"
      },
      "description": "X and Y of the cell on the Daymet Lambert Conformal Conic grid."
    },
    "loc": {
      "type": "array",
      "items": {
        "type": "number"
      },
      "description": "The grid cell centre the request resolved to: [latitude, longitude]."
    },
    "Tile": {
      "type": "string",
      "description": "Daymet tile number."
    },
    "data": {
      "type": "object",
      "description": "One array per column, all the same length and in date order: year, yday (day of the year, 1 to 365) and one array per requested variable, keyed with its unit, for example 'tmax (deg c)' or 'prcp (mm/day)'.",
      "additionalProperties": {
        "type": "array",
        "items": {
          "type": [
            "number",
            "null"
          ]
        }
      }
    },
    "citation": {
      "type": "string",
      "description": "The dataset citation the service attaches to every response."
    },
    "Elevation": {
      "type": "string",
      "description": "Elevation of the grid cell, for example '320 m'."
    }
  },
  "description": "The Daymet daily series for one grid cell, as Daymet returns it with format=json.",
  "additionalProperties": true
}