CIMIS Hourly Data - Multiple Stations

Archive of CIMIS weather station hourly measurements from 2010-2025 for 18 different stations.

Data and Resources

Additional Info

Field Value
Last Updated November 10, 2025, 16:21 (UTC)
Created November 10, 2025, 16:21 (UTC)
accessRights <p>This dataset is publicly available for research and educational use.</p><p>Original data were collected by the California Department of Water Resources (CIMIS Program) and redistributed through F3 Innovate for open research purposes.</p>
columnDataDict { "columns": [ { "name": "Stn Id", "description": "Unique numeric identifier assigned to the CIMIS station.", "units": null, "notes": "Station #80 corresponds to Fresno State." }, { "name": "Stn Name", "description": "Common name of the CIMIS station.", "units": null, "notes": "" }, { "name": "CIMIS Region", "description": "Regional grouping used by CIMIS (e.g., San Joaquin Valley).", "units": null, "notes": "" }, { "name": "Date", "description": "Calendar date of observation.", "units": "YYYY-MM-DD", "notes": "" }, { "name": "Hour (PST)", "description": "Observation hour in Pacific Standard Time.", "units": "HHMM", "notes": "Local station time; not UTC." }, { "name": "Jul", "description": "Julian day of year.", "units": "day-of-year", "notes": "" }, { "name": "ETo (mm)", "description": "Reference evapotranspiration calculated by CIMIS using the Penman-Monteith equation.", "units": "millimeters per day", "notes": "" }, { "name": "ETo qc", "description": "Quality-control flag for ETo.", "units": null, "notes": "Blank indicates no issue." }, { "name": "Precip (mm)", "description": "Precipitation amount.", "units": "millimeters per hour", "notes": "" }, { "name": "Precip qc", "description": "Quality-control flag for Precipitation.", "units": null, "notes": "" }, { "name": "Sol Rad (W/sq.m)", "description": "Incoming solar radiation.", "units": "watts per square meter", "notes": "" }, { "name": "Sol Rad qc", "description": "Quality-control flag for Solar Radiation.", "units": null, "notes": "" }, { "name": "Vap Pres (kPa)", "description": "Mean vapor pressure representing atmospheric humidity.", "units": "kilopascals", "notes": "" }, { "name": "Vap Pres qc", "description": "Quality-control flag for Vapor Pressure.", "units": null, "notes": "" }, { "name": "Air Temp (C)", "description": "Air temperature measured at 1.5 meters above ground.", "units": "°C", "notes": "" }, { "name": "Air Temp qc", "description": "Quality-control flag for Air Temperature.", "units": null, "notes": "" }, { "name": "Rel Hum (%)", "description": "Relative humidity.", "units": "percent", "notes": "" }, { "name": "Rel Hum qc", "description": "Quality-control flag for Relative Humidity.", "units": null, "notes": "" }, { "name": "Dew Point (C)", "description": "Dew-point temperature derived from vapor pressure.", "units": "°C", "notes": "" }, { "name": "Dew Point qc", "description": "Quality-control flag for Dew Point.", "units": null, "notes": "" }, { "name": "Wind Speed (m/s)", "description": "Mean wind speed measured at 2 meters above ground.", "units": "meters per second", "notes": "" }, { "name": "Wind Speed qc", "description": "Quality-control flag for Wind Speed.", "units": null, "notes": "" }, { "name": "Wind Dir (0-360)", "description": "Mean wind direction.", "units": "degrees from north", "notes": "0 = North, 90 = East, 180 = South, 270 = West." }, { "name": "Wind Dir qc", "description": "Quality-control flag for Wind Direction.", "units": null, "notes": "" }, { "name": "Soil Temp (C)", "description": "Soil temperature measured at 15 cm depth.", "units": "°C", "notes": "" }, { "name": "Soil Temp qc", "description": "Quality-control flag for Soil Temperature.", "units": null, "notes": "" } ] }
creationMethod <p>Original hourly weather data were downloaded from the California Irrigation Management Information System (CIMIS) web portal (<a href="https://cimis.water.ca.gov/?utm_source=chatgpt.com" rel="noopener noreferrer" target="_blank" style="color: inherit;">https://cimis.water.ca.gov/</a>) for 18 different stations. Data spanning 2010–2025 were exported through the CIMIS online interface as CSV files, concatenated, and minimally cleaned for formatting consistency.</p><p>The processed dataset was then uploaded to an S3 bucket and registered through the National Data Platform for use in the F3 Innovate Frost Risk Forecast Data Challenge.</p>
creatorEmail cimisinfo@water.ca.gov
creatorName California Department of Water Resources (CIMIS Program)
creatorWebsite https://cimis.water.ca.gov/
dataAuthType public
dataBbox { "type": "Feature", "geometry": { "type": "Polygon", "coordinates": [ [ [-121.659730, 35.205810], [-118.778437, 35.205810], [-118.778437, 38.887603], [-121.659730, 38.887603], [-121.659730, 35.205810] ] ] }, "properties": { "description": "Bounding box encompassing all 18 CIMIS stations across California’s Central Valley and adjacent regions.", "projection": "EPSG:4326 (WGS84)", "west": -121.659730, "east": -118.778437, "south": 35.205810, "north": 38.887603 } }
dataBboxFormat geojson
dataProvenance [{"date":"2025-11-01","name":"Data downloaded from CIMIS portal"},{"date":"2025-11-09","name":"Dataset uploaded to S3 for publication on NDP"}]
dataType CSV
datasetVersion v1.0
docsURL https://cimis.water.ca.gov/Resources.aspx
endDateTime 2025-09-28T00:00
issueDate 2025-11-09
lang en
lastUpdateDate 2025-11-09
license cc-by
ndp_creator_md5 d17b3c429094e728489075ce907e2a94
pocEmail ryan@f3innovate.org
pocName Ryan Dinubilo
pocWebsite https://f3i.org
publisherEmail ryan@f3innovate.org
publisherName F3 Innovate
publisherWebsite https://f3i.org
purpose <p>Primary dataset for the Frost Risk Forecast Data Challenge</p>
spatialCov { "type": "FeatureCollection", "description": "Hourly meteorological observations from 18 California Irrigation Management Information System (CIMIS) stations distributed across California's Central Valley and adjacent regions. Each feature represents a point-based observation site used for frost risk forecasting.", "features": [ { "type": "Feature", "properties": { "id": 2, "name": "Five Points", "county": "Fresno", "elev_m": 285 }, "geometry": { "type": "Point", "coordinates": [-120.112906, 36.336222] } }, { "type": "Feature", "properties": { "id": 7, "name": "Firebaugh/Telles", "county": "Fresno", "elev_m": 185 }, "geometry": { "type": "Point", "coordinates": [-120.590980, 36.851248] } }, { "type": "Feature", "properties": { "id": 15, "name": "Stratford", "county": "Kings", "elev_m": 193 }, "geometry": { "type": "Point", "coordinates": [-119.851408, 36.158138] } }, { "type": "Feature", "properties": { "id": 39, "name": "Parlier", "county": "Fresno", "elev_m": 337 }, "geometry": { "type": "Point", "coordinates": [-119.504120, 36.597481] } }, { "type": "Feature", "properties": { "id": 47, "name": "Brentwood", "county": "Contra Costa", "elev_m": 45 }, "geometry": { "type": "Point", "coordinates": [-121.659730, 37.928154] } }, { "type": "Feature", "properties": { "id": 70, "name": "Manteca", "county": "San Joaquin", "elev_m": 38 }, "geometry": { "type": "Point", "coordinates": [-121.223194, 37.834822] } }, { "type": "Feature", "properties": { "id": 71, "name": "Modesto", "county": "Stanislaus", "elev_m": 35 }, "geometry": { "type": "Point", "coordinates": [-121.187764, 37.645222] } }, { "type": "Feature", "properties": { "id": 80, "name": "Fresno State", "county": "Fresno", "elev_m": 339 }, "geometry": { "type": "Point", "coordinates": [-119.742308, 36.820833] } }, { "type": "Feature", "properties": { "id": 105, "name": "Westlands", "county": "Fresno", "elev_m": 191 }, "geometry": { "type": "Point", "coordinates": [-120.381811, 36.634028] } }, { "type": "Feature", "properties": { "id": 124, "name": "Panoche", "county": "Fresno", "elev_m": 183 }, "geometry": { "type": "Point", "coordinates": [-120.731665, 36.890096] } }, { "type": "Feature", "properties": { "id": 125, "name": "Arvin-Edison", "county": "Kern", "elev_m": 508 }, "geometry": { "type": "Point", "coordinates": [-118.778437, 35.205810] } }, { "type": "Feature", "properties": { "id": 131, "name": "Fair Oaks", "county": "Sacramento", "elev_m": 265 }, "geometry": { "type": "Point", "coordinates": [-121.218872, 38.649964] } }, { "type": "Feature", "properties": { "id": 146, "name": "Belridge", "county": "Kern", "elev_m": 410 }, "geometry": { "type": "Point", "coordinates": [-119.691144, 35.505833] } }, { "type": "Feature", "properties": { "id": 182, "name": "Delano", "county": "Tulare", "elev_m": 300 }, "geometry": { "type": "Point", "coordinates": [-119.255846, 35.833059] } }, { "type": "Feature", "properties": { "id": 194, "name": "Oakdale", "county": "Stanislaus", "elev_m": 183 }, "geometry": { "type": "Point", "coordinates": [-120.852101, 37.720739] } }, { "type": "Feature", "properties": { "id": 195, "name": "Auburn", "county": "Placer", "elev_m": 935 }, "geometry": { "type": "Point", "coordinates": [-121.102908, 38.887603] } }, { "type": "Feature", "properties": { "id": 205, "name": "Coalinga", "county": "Fresno", "elev_m": 730 }, "geometry": { "type": "Point", "coordinates": [-120.360270, 36.175833] } }, { "type": "Feature", "properties": { "id": 206, "name": "Denair II", "county": "Stanislaus", "elev_m": 150 }, "geometry": { "type": "Point", "coordinates": [-120.754531, 37.545869] } } ] }
spatialCovFormat geojson
spatialProjection EPSG:4326 (WGS 84 – Latitude/Longitude)
spatialRes 100 meter
startDateTime 2010-09-28T01:00
status submitted
temporalRes hours
theme ["Weather"]
timezone PST
updateFreq As needed
uploadType dataset
usageInfo <p>Please cite the California Irrigation Management Information System (CIMIS) as the original data provider:</p><ul><li><strong>California Department of Water Resources (DWR), California Irrigation Management Information System (CIMIS).</strong></li></ul><p><br></p><p>When using or publishing results derived from this dataset, please include the following acknowledgment:</p><p><br></p><p>“Data were obtained from the California Irrigation Management Information System (CIMIS), operated by the California Department of Water Resources, and republished by F3 Innovate via the National Data Platform (NDP).”</p><p><br></p><p>Users are responsible for ensuring proper attribution and compliance with CIMIS data-use policies: https://cimis.water.ca.gov/</p>