DTN Parameters API
This API offers climatological data for any numerical month and day, including leap day (February 29).It’s possible to aggregate certain parameters over multiple days. To request an aggregation, just substitute the desired parameter name and specify an `interval` greater than 1 day (see `Endpoints` section for details). For example, if air temperature maximum average (`airTempMaxAvg`) has corresponding parameters `airTempMaxAvgMax`, `airTempMaxAvgAvg`, request parameter `airTempMaxAvgAvg` with `interval=2` in the query string to obtain the 2 day average daily maximum air temperature average.Expand the table below to view available environmental parameters and each one's description and unit of measurement. The API returns all parameters by default unless specific parameters are requested.The table that follow identify which parameters have corresponding aggregation parameter names. Click to expand...| Parameter | Default | Description | Metric units | Imperial units | Aggregation Parameters ||--------------------------|---------|-------------|--------------|----------------|------------------------|| airTempAvg | Yes | Average daily air temperature at 2 meters above ground level. | degree Celsius | degree Fahrenheit |airTempAvgAvg|| airTempStdDev | Yes | Standard deviation of daily average air temperature at 2 meters above ground level. | degree Celsius | degree Fahrenheit |airTempStdDevAvg|| airTempMaxAvg | Yes | Average daily maximum air temperature at 2 meters above ground level. | degree Celsius | degree Fahrenheit |airTempMaxAvgMax, airTempMaxAvgAvg|| airTempMaxStdDev | Yes | Standard deviation of daily maximum air temperature at 2 meters above ground level. | degree Celsius | degree Fahrenheit |airTempMaxStdDevAvg|| airTempMinAvg | Yes | Average daily minimum air temperature at 2 meters above ground level. | degree Celsius | degree Fahrenheit |airTempMinAvgMin, airTempMinAvgAvg|| airTempMinStdDev | Yes | Standard deviation of daily minimum air temperature at 2 meters above ground level. | degree Celsius | degree Fahrenheit |airTempMinStdDevAvg|| dewPointAvg | Yes | Average daily dew point temperature at 2 meters above ground level. | degree Celsius | degree Fahrenheit |dewPointAvgAvg|| dewPointStdDev | Yes | Standard deviation of daily average dew point temperature at 2 meters above ground level. | degree Celsius | degree Fahrenheit |dewPointStdDevAvg|| potentialEvapotranspirationAmountAvg | Yes | Average daily reference evapotranspiration (amount of water that would transpire and evaporate from a hypothetical reference crop when ample water is available). | millimeter | inch |potentialEvapotranspirationAmountAvgSum|| longWaveRadiationAvg | Yes | Average daily downwelling longWave radiation flux (energy emitted from non-solar radiation sources). | watt per square meter | watt per square meter |longWaveRadiationAvgMax, longWaveRadiationAvgMin, longWaveRadiationAvgAvg|| longWaveRadiationStdDev | Yes | Standard deviation of daily downwelling longWave radiation flux. | watt per square meter | watt per square meter |longWaveRadiationStdDevAvg|| precipAmountAvg | Yes | Average daily accumulated liquid-equivalent precipitation. | millimeter | inch |precipAmountAvgAvg, precipAmountAvgSum|| shortWaveRadiationAvg | Yes | Average daily downwelling shortWave radiation flux (high-energy solar radiation that reaches Earth’s surface). | watt per square meter | watt per square meter |shortWaveRadiationAvgMax, shortWaveRadiationAvgMin, shortWaveRadiationAvgAvg|| shortWaveRadiationStdDev | Yes | Standard deviation of daily downwelling shortWave radiation flux. | watt per square meter | watt per square meter |shortWaveRadiationStdDevAvg|| sunshineDurationAvg | Yes | Average daily duration of sunshine based on cloud cover and downwelling shortWave radiation. | minute | minute |sunshineDurationAvgAvg, sunshineDurationAvgSum|| surfacePressureAvg | Yes | Average daily surface barometric pressure. | hectopascal | millibar |surfacePressureAvgAvg|| surfacePressureStdDev | Yes | Standard deviation of daily surface barometric pressure. | hectopascal | millibar |surfacePressureStdDevAvg|| windSpeedAvg | Yes | Average daily wind speed at 10 meters above ground level. | meter per second | mile per hour |windSpeedAvgAvg|| windSpeedStdDev | Yes | Standard deviation of daily wind speed at 10 meters above ground level. | meter per second | mile per hour |windSpeedStdDevAvg|
DTN Parameters API is one of 99 APIs that DTN publishes on the APIs.io network, described by a machine-readable OpenAPI specification.
Tagged areas include Parameters. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, an API reference, and release notes.
This API exposes 3 operations across 3 paths, and defines 4 schemas. It is described by OpenAPI 3.2.0, at version 1.0.
Requests are made against 9 base URLs: https://climatology.api.dtn.com, https://lightning.api.dtn.com, https://weather.api.dtn.com, https://pavement-condition.prd.wx.zones.dtn.com/v2, https://pavement-condition.stg.wx.zones.dtn.com/v2, https://precipitation.api.dtn.com, https://probabilistic.api.dtn.com, https://renewables.api.dtn.com, https://soil.api.dtn.com.
Metadata
The identity and technical contract details declared by the specification.
Authentication & Security 1
DTN Parameters API declares
1 security scheme
for authenticating requests.
It supports OAuth 2.0 (clientCredentials) using the clientCredentials flow.
clientCredentials— Using DAIS for M2M/API Auth You have been given a Client ID and a Client Secret, which are used to request a DTN Access Token. DTN Access Tokens are required w…
Paths & Operations 3
Across 3 paths, the API surfaces 3 operations — 3 GET. Each is listed below with its method, path, parameters, and response codes.
This API offers climatological data for any numerical month and day, including leap day (February 29). It’s possible to aggregate certain parameters over multiple days. To request…
Schemas 4
The contract defines 4 schemas that model the data the API accepts and returns. The most detailed are Parameter (7 properties), Error (5 properties). Each schema is shown below with its type and property counts.
Specification
The full machine-readable OpenAPI contract behind this narrative.
Source
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