Documentation for /cgi-bin/request/daily.py
This data source contains a combination of IEM computed calendar day summaries and some more official totals with some sites reporting explicit values. One should also note that typically the airport stations are for a 24 hour period over standard time, which means 1 AM to 1 AM daylight time.
Example Usage
Request all high temperature data for Ames, IA (AMW) for the month of January 2019:
https://mesonet.agron.iastate.edu/cgi-bin/request/daily.py?sts=2019-01-01&ets=2019-01-31&network=IA_ASOS&stations=AMW&var=max_temp_f&format=csv
Request daily precipitation and the climatology for all stations in Washington state on 23 June 2023 in Excel format:
https://mesonet.agron.iastate.edu/cgi-bin/request/daily.py?sts=2023-06-23&ets=2023-06-23&network=WA_ASOS&stations=_ALL&var=precip_in,climo_precip_in&format=excel
CGI Arguments
The following table lists the CGI arguments that are accepted by this service. A HTTP GET request is required. Fields of type Multi-Params or CSV value can accept either a comma separated list or multiple parameter and value combinations. For example, ?foo=1&foo=2 is equivalent to ?foo=1,2.
| Field | Type | Description |
|---|---|---|
| ets | string | End date to query |
| format | string | The format of the output |
| na | string | The NA value to use |
| network | string (required) | Network Identifier |
| station | Multi-Params or CSV value | Comma delimited or multi-param station identifiers, _ALL for all stations in network (deprecated) |
| stations | Multi-Params or CSV value | Comma delimited or multi-param station identifiers, _ALL for all stations in network |
| sts | string | Start date to query |
| var | Multi-Params or CSV value | Comma delimited or multi-param variable names to include in output, columns are: ['max_temp_f', 'min_temp_f', 'max_dewpoint_f', 'min_dewpoint_f', 'precip_in', 'avg_wind_speed_kts', 'avg_wind_drct', 'min_rh', 'avg_rh', 'max_rh', 'climo_high_f', 'climo_low_f', 'climo_precip_in', 'snow_in', 'snowd_in', 'min_feel', 'avg_feel', 'max_feel', 'max_wind_speed_kts', 'max_wind_gust_kts', 'srad_mj'] |
| year1 | integer | Start year when sts is not provided |
| month1 | integer | Start month when sts is not provided |
| day1 | integer | Start day when sts is not provided |
| year2 | integer | End year when ets is not provided |
| month2 | integer | End month when ets is not provided |
| day2 | integer | End day when ets is not provided |