1. ISU Soil Moisture Network
  2. Minute/Hourly Download
Legacy "ISU AgClimate" 1986-~2013
Hourly Data
Daily Data
"ISU Soil Moisture Network" ~2013-present
  Hourly Data
Inversion Data
Daily Data

Minute/Hourly Data:

the present data collection interval from this network is every 15 minutes for the vineyard sites and every minute for the others. the minute interval data only started in 2021 though. The default download is to provide the hourly data.

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

Select Time Resolution:

Select station(s):

View station metadata





























Select the time interval:

Year:Month:Day:
Starting On:
Ending On:

Options:

Select from available variables
Reference Evapotranspiration (alfalfa)














The Ames-AEA, Ames-Kitchen, Ames-Hinds, and Jefferson locations have the CS SoilVue 10 installed, but the depth of installation varies by site with the first depth at the Ames-AEA location being at 14 inches.

or select from the following depths:













Vineyard Station-only Variables








How should the data be formatted?:  

How should missing values be represented?:

Timezone for Data:

Submit your request:

Description of variables in download

station
National Weather Service Location Identifier for the site. this is a five character identifier.
valid
Timestamp of the observation either in CST or CDT
tmpf
Air Temperature [F]
relh
Relative Humidity [%]
solar
Solar Radiation [Joule/m2]
precip
One Hour Precipitation [inch]
speed
Wind Speed [mph], 10 minute average, 10 ft above ground
drct
Wind Direction [degrees North], 10 minute average, 10 ft above ground
et
Potential Evapotranspiration (Alfalfa) [inch]
soil04t
4 inch Depth Soil Temperature [F]
soil12t
12 inch Depth Soil Temperature [F]
soil24t
24 inch Depth Soil Temperature [F]
soil50t
50 inch Depth Soil Temperature [F]
soil12vwc
12 inch Depth Soil Volumetric Water Content [%]
soil24vwc
24 inch Depth Soil Volumetric Water Content [%]
soil50vwc
50 inch Depth Soil Volumetric Water Content [%]

Publications Citing IEM Data

These are publications that have cited the usage of data from this page. This list is not exhaustive, so please let us know if you have a publication that should be added. Hopefully by early 2025, this listing can be more complete.