Frost Risk

Agriculture Math & Calculations Credits / request: 1

Counts frost nights where daily minimum temperature is at or below a threshold.

GET https://api.apikodu.com/api/v1/agriculture/frostrisk

Documentation

Overview

Frost nights below a threshold. Weather data © Copernicus ERA5 / ERA5-Land (contains modified Copernicus Climate Change Service information) / Open-Meteo / OpenWeather / MET Norway.

Authentication

Every request requires the x-api-key header. Credits used and remaining quota are returned in response headers (x-api-credits-used, x-api-remaining-credits, x-rate-limit-*).

Request

GET https://api.apikodu.com/api/v1/agriculture/frostrisk?latitude=39.92&longitude=32.87&horizonDays=10&threshold=0

GET query or POST JSON (with dailyTemps). If fromDate/toDate are omitted, horizonDays is used (default 10).

Parameters

Name	Type	Required	Default	Options	Description
`fromDate`	string	Optional	—	—	YYYY-MM-DD. Empty uses today plus horizonDays.
`toDate`	string	Optional	—	—	YYYY-MM-DD
`threshold`	number	Optional	`0`	—	Frost threshold °C. Default 0. -20..5.
`latitude`	number	Optional	—	—	Required without dailyTemps.
`longitude`	number	Optional	—	—	Longitude.
`includeBreakdown`	boolean	Optional	`true`	`true` `false`	Night breakdown.
`horizonDays`	integer	Optional	`10`	—	Forecast horizon in days when fromDate/toDate are omitted. Default 10. Range 1–10.

Response

Name	Type	Description
`frostNights`	integer	Number of nights with tmin <= threshold.
`threshold`	number	Frost threshold °C used.
`minTemperature`	number	Lowest tmin °C in the window. Null when no data.
`firstFrostDate`	string	First frost night YYYY-MM-DD. Null if none.
`lastFrostDate`	string	Last frost night YYYY-MM-DD. Null if none.
`hoursBelow`	integer	Hours with temperature at or below the threshold. Null when hourly data is missing.
`horizonDays`	integer	Forecast horizon used. Null when dates were supplied.
`fromDate`	string	Window start YYYY-MM-DD.
`toDate`	string	Window end YYYY-MM-DD.
`daysTotal`	integer	Calendar days in the window (fromDate..toDate).
`daysWithData`	integer	Days that have temperature data.
`missingCount`	integer	Days without data. missingDates.Length.
`missingDates`	array	YYYY-MM-DD list of missing days.
`gridLatitude`	number	0.1° cell latitude. Null when dailyTemps was used.
`gridLongitude`	number	0.1° cell longitude. Null when dailyTemps was used.
`nights`	array	Frost nights when includeBreakdown=true. Empty array when false.
`nights[].date`	string	Frost night YYYY-MM-DD.
`nights[].tmin`	number	Minimum temperature °C that night.
`method`	string	Calculation method. daily-tmin-threshold for this API.
`source`	string	user: dailyTemps or et0Mm. db: tarim_hava cell.
`disclaimer`	string	Decision-support disclaimer. Not agronomic advice. When source is database: Weather data © Copernicus ERA5 / ERA5-Land (contains modified Copernicus Climate Change Service information) / Open-Meteo / OpenWeather / MET Norway.

Errors

HTTP	code	Description
`400`	`-249`	Body missing (POST) or threshold outside -20..5.
`400`	`-254`	fromDate/toDate missing, not YYYY-MM-DD, or the window exceeds 366 days.
`400`	`-255`	latitude/longitude are required without dailyTemps. Latitude -90..90, longitude -180..180.
`429`	`-316`	Daily new location (cell) limit (50) reached. Previously requested locations keep working; new locations next day (UTC). Retry-After header gives seconds until end of day.
`503`	`-256`	Cell created; Worker is filling the last 730 days. Retry in a few minutes.
`400`	`-251`	No weather for this location/date (and no dailyTemps).
`401`	`-100`	x-api-key is missing, empty, malformed, inactive, banned, expired, IP-restricted, or not allowed for this API.
`429`	`-221`	Per-minute request limit exceeded. Response headers: x-rate-limit-limit, x-rate-limit-remaining, x-rate-limit-reset.
`429`	—	Package credit quota cannot cover this request. Body may be { error, limit, currentUsage, requestCost } (no code field).
`500`	`-1`	Unexpected server error. message is a generic error text without technical details.

Notes

Success body is { data: { ... } }. Error body is { code, message }. code is an ApiResponseCode enum value (negative integer).

Sample response

{
  "data": {
    "frostNights": 2,
    "threshold": 0.0,
    "minTemperature": -3.1,
    "firstFrostDate": "2026-04-04",
    "lastFrostDate": "2026-04-12",
    "fromDate": "2026-04-01",
    "toDate": "2026-04-30",
    "daysTotal": 30,
    "daysWithData": 30,
    "missingCount": 0,
    "method": "daily-tmin-threshold",
    "source": "user",
    "disclaimer": "Decision support only. Not agronomic advice."
  }
}

Code samples

  
      const response = await fetch('https://api.apikodu.com/api/v1/agriculture/frostrisk', {
        method: 'GET',
        headers: {
          'x-api-key': 'YOUR_API_KEY'
        }
      });

      const data = await response.json();
      console.log(data);

  
      import requests

      headers = {
          'x-api-key': 'YOUR_API_KEY'
      }

      response = requests.get('https://api.apikodu.com/api/v1/agriculture/frostrisk', headers=headers)
      print(response.json())

  
      using var client = new HttpClient();
      client.DefaultRequestHeaders.Add("x-api-key", "YOUR_API_KEY");

      var response = await client.GetStringAsync("https://api.apikodu.com/api/v1/agriculture/frostrisk");
      Console.WriteLine(response);

  
      $response = file_get_contents('https://api.apikodu.com/api/v1/agriculture/frostrisk', false, stream_context_create([
          'http' => [
              'header' => "x-api-key: YOUR_API_KEY"
          ]
      ]));

      print_r(json_decode($response, true));

  
      curl -X GET 'https://api.apikodu.com/api/v1/agriculture/frostrisk' \
        -H 'x-api-key: YOUR_API_KEY'

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