Examples of Timeseries Requests

August 11, 2022 · View on GitHub

This page has example queries. For more indepth instructions on how to make them see Using the Timeseries API -page.

Feel free to contribute your own examples on this page!

How to Use the Examples

Please note that some data in the examples are only only available for commercial use and are therefore not found in the FMI Open Data.

For FMI Open Data replace the host part in the example URLs with opendata.fmi.fi.

For commercial use replace the host part with data.fmi.fi and add your personal apikey with /apikey/WriteApiKeyHere/timeseries before the querystring.

Most examples here format the output as styled HTML for testing purposes. Use Json or other machine readable formats for any real use.

Observations

Basic query for surface weather observations in a point

http://smartmet.fmi.fi/timeseries?precision=double&timestep=data&param=utctime,fmisid,stationname,stationlat,stationlon,distance,TA_PT1H_AVG&producer=observations_fmi&latlon=60.1757,24.9336&starttime=2018-05-14T00:00:00&endtime=2018-05-15T00:00:00&tz=UTC&format=debug

The param field defines what values to return in results.

  • utctime: Time of observation in UTC
  • fmisid: FMI's ID-number of weather station
  • stationname: Name of the weather station
  • stationlat: Latitude of the weather stations location
  • stationlon: Longitude of the weather stations location
  • distance: Distance from requested location to the weather station in meters
  • TA_PT1H_AVG: The actual weather observation. Temperature of the past hour.

Other querystring fields in the example are used to filte

  • precision=double: Allow decimals in number values of observations
  • timestep=data: Request that all available observations within the time rage are returned for requested parameters
  • producer=observations_fmi: Use FMI's observation stations
  • latlon=60.1757,24.9336: Point of interest where the nearest observations should be returned
  • format=debug: Return human readable HTML-table (use format=json for Json-formatted data)

The weather observations, if any is availble, are within the requested time range, including the start and end times.

  • starttime=2018-05-14T00:00:00: Get observations made later or at this time
  • endtime=2018-05-15T00:00:00: Get observations made before or at this time
  • tz=UTC: Given times are in UTC timezone. This can be replaced with a Z at the end of timestrings.

Returns and array of Json objects.

[
  {
    "utctime":"20180514T000000",
    "fmisid":100971,
    "stationname":"Helsinki Kaisaniemi",
    "stationlat":60.1752300,
    "stationlon":24.9445900,
    "distance":0.6,
    "TA_PT1H_AVG":13.0
  },
...
]

Temperatures on All Weather Stations in Finland

This uses the groupareas=0 field to return data as multiple items. Parameter is TA_PT1H_AVG but might as well be Temperature.

http://smartmet.fmi.fi/timeseries?producer=observations_fmi&area=Finland&param=utctime,fmisid,stationname,TA_PT1H_AVG&format=debug&starttime=2018-07-07T00:00:00Z&endtime=2018-07-07T00:00:00Z&groupareas=0

Solar observations

http://smartmet.fmi.fi/timeseries?producer=observations_fmi&place=kumpula&param=utctime,fmisid,stationname,GLOB_PT1H_SUM&format=debug&tz=utc&starttime=2018-07-07T00:00:00

Sensor number

http://smartmet.fmi.fi/timeseries?param=time,name,t2m(:1),t2m(:11)&fmisid=101004&producer=observations_fmi&format=ascii&timeformat=sql&timestep=data&precision=double&starttime=202002200800&endtime=202002200810

Sensor number and quality flag

http://smartmet.fmi.fi/timeseries?param=time,name,t2m(:1),t2m(:11),t2m(:1:qc),t2m(:11:qc)&fmisid=101004&producer=observations_fmi&format=ascii&timeformat=sql&timestep=data&precision=double&starttime=202002200800&endtime=202002200810

Station information

Use lang=fi|en|sv to set preferred language in results.

http://smartmet.fmi.fi/timeseries?producer=observations_fmi&latlon=60.20,24.96&param=utctime,TA_PT1H_AVG,fmisid,wmo,region,country,stationname,elevation,stationlatitude,stationlongitude,distance&format=debug&timesteps=1

Foreign observations

Use lang=fi|en|sv to set preferred language in results.

http://smartmet.fmi.fi/timeseries?producer=foreign&place=Tokyo&param=utctime,temperature,elevation,country,region,latitude,longitude&format=debug

Time aggregation

http://smartmet.fmi.fi/timeseries?producer=observations_fmi&latlon=60.20,24.96&param=fmisid,stationname,utctime,TA_PT1H_AVG,mean_t(TA_PT1H_AVG:3h)&format=debug&starttime=2018-08-08T00:00:00&timesteps=24&tz=utc

Area aggregation

http://smartmet.fmi.fi/timeseries?format=debug&area=Helsinki&param=fmisid,name,time,min(TA_PT1H_AVG)%20as%20mintemp,max(TA_PT1H_AVG)%20as%20maxtemp%20,mean(TA_PT1H_AVG)%20as%20meantemp&producer=observations_fmi&numberofstations=50

Lightning data

http://smartmet.fmi.fi/timeseries?producer=flash&starttime=2018-08-01T00:00:00&endtime=2018-08-01T01:00:00&param=utctime,flash_id,peak_current,latitude,longitude&bbox=6,51.3,49,70.2&format=json

Heating Requirement Number

These calculated values are not available in the opendata.

The parameter HDD_P1D_AVG aka. "lämmitystarveluku" or "astepäiväluku" in Finnish.

Example to get a single values for all availble weather startions for given time

http://smartmet.fmi.fi/timeseries?producer=observations_fmi&param=stationname,utctime,HDD_P1D_AVG&precision=double&keyword=synop_fi&starttime=2021-05-01T00:00:00Z&timestep=data&timesteps=1&format=json

For any particular location use use for example fmisid instead of keyword.

http://smartmet.fmi.fi/timeseries?producer=observations_fmi&param=stationname,utctime,HDD_P1D_AVG&precision=double&fmisid=151049&starttime=2021-05-01T00:00:00Z&timestep=data&timesteps=1&format=json

Forecast

ECMWF Calibrated Fractiles

Availabe only available for commercial use and are therefore not found in the FMI Open Data.

Example returns latest forecast for Helsinki

/timeseries?producer=ecmwf_eurooppa_calibrated_fractiles&format=json&param=TemperatureF10,TemperatureF90,TemperatureDeviation,WindSpeedF90,WindSpeedF10,TotalPrecipitationF90,TotalPrecipitationF10&place=Helsinki

MetCoOp NowCasting

Example returns latest forecast for Helsinki:

/timeseries?producer=metcoop_scandinavia_nowcast_surface&format=json&param=utctime,Pressure,Temperature,WindDirection,WindSpeedMS&place=Helsinki