IEM :: NWS COOP Daily Plotter

This application plots the once daily long term climate sites for a given date. The IEM maintains two datasets in this space. The first being the preliminary NWS COOP observations, which dates back to 2004 or so. For this dataset, an interactive map exists. The second being a more quality controlled and gap-filled dataset called "climodat". This data goes back much further.

Select State:	Select Datasource:	Select Parameter:	Timing	Year	Month	Day	Image Size
		Note: Temperature at Observation is only available for the "Preliminary" data source.						1 Day 1 Day

Show point labels

Snowfall data is not complete. Please be careful using the data.
Snowfall depth data only goes back to 1991 for Quality Controled source.
The preliminary data is for the date the observation was reported and not necessarily for the local date. The reports are around 7 AM, so the high temperature (for example) was most likely for the previous date.

Data Listing

# 2026-08-19 High Temperature
# Download From: https://mesonet.agron.iastate.edu/GIS/apps/coop/plot.phtml
# Download Date: 19 Aug 2026
# Data Contact: Daryl Herzmann akrherz@iastate.edu 515.294.5978
#-----------------------snip------------------
ID    , StationName         , County              , Date      ,   Latitude,  Longitude, Hour,       high

You should be able to 'copy & paste' this raw data listing into a simple text editor and save the data file on your machine. Most GIS systems can then import this dataset as a layer. You may have to omit the commented lines (#) if your GIS has trouble importing the data.