IEM Computed Daily Summary of Observations

This page allows you to download the IEM computed daily summary of whatever observations the IEM collected for a given observation site. You can also download data from COOP networks with this interface, in which case the "daily" data are effectively the once-daily observations. If you request all stations, you can only request up to 1 year of data at a time.

Backend documentation exists for those wishing to script against this service.

Select network to download from:


Select inclusive date period:


Select from available daily variables

Note: Values of 0.0001 inches are Trace Reports

How to represent missing values:

Download Data Format: