PRISM Monthly Spatial Climate Dataset AN81m

  • The PRISM datasets are gridded climate datasets for the conterminous United States, produced by the PRISM Climate Group at Oregon State University, providing monthly data from 1895 to 2025.

  • These datasets include bands for precipitation, temperature (mean, min, max), dew point temperature, and vapor pressure deficit (min, max), with a pixel size of 4638.3 meters.

  • While valuable for climate analysis, these datasets should not be used for calculating century-long climate trends due to variations from station equipment and location changes, among other factors.

  • The datasets are re-modeled several times until six months have elapsed, at which point they are considered permanent.

  • These PRISM datasets are available without restriction on use or distribution, with the request for proper attribution to PRISM.
OREGONSTATE/PRISM/AN81m
Dataset Availability
1895-01-01T00:00:00Z–2025-09-01T00:00:00Z
Dataset Provider
Earth Engine Snippet
ee.ImageCollection("OREGONSTATE/PRISM/AN81m")
Cadence
1 Month
Tags
climate geophysical monthly oregonstate precipitation pressure prism temperature vapor weather

Description

The PRISM daily and monthly datasets are gridded climate datasets for the conterminous United States, produced by the PRISM Climate Group at Oregon State University.

Grids are developed using PRISM (Parameter-elevation Regressions on Independent Slopes Model). PRISM interpolation routines simulate how weather and climate vary with elevation, and account for coastal effects, temperature inversions, and terrain barriers that can cause rain shadows. Station data are assimilated from many networks across the country. For more information, see the Descriptions of PRISM Spatial Climate Datasets.

Note

  • Warning, this dataset should not be used to calculate century-long climate trends due to non-climatic variations from to station equipment and location changes, openings and closings, varying observation times, and the use of relatively short-term networks. Please see the dataset documentation for more details.
  • It takes time for observation networks to conduct quality control and release station data. Therefore, PRISM datasets are re-modeled several times until six months have elapsed, when they are considered permanent. A release schedule is available.
  • For use of the 30 arc-second (~800 m) version of this dataset please contact the provider at prism-questions@nacse.org.

Bands

Pixel Size
4638.3 meters

Bands

Name Units Min Max Pixel Size Description
ppt mm 0* 2639.82* meters

Monthly total precipitation (including rain and melted snow)
tmean °C -30.8* 41.49* meters

Monthly average of daily mean temperature (calculated as (tmin+tmax)/2)
tmin °C -35.11* 34.72* meters

Monthly minimum temperature
tmax °C -29.8* 49.74* meters

Monthly average of daily maximum temperature
tdmean °C -30.7* 26.76* meters

Monthly average of daily mean dew point temperature
vpdmin hPa 0* 44.79* meters

Monthly average of daily minimum vapor pressure deficit
vpdmax hPa 0.009* 110.06* meters

Monthly average of daily maximum vapor pressure deficit
* estimated min or max value

Image Properties

Image Properties

Name Type Description
PRISM_CODE_VERSION STRING_LIST

List of code versions per-band, e.g: the first element is for the first band "ppt", the second element is for the second band "tmean"
PRISM_DATASET_CREATE_DATE STRING_LIST

List of original creation dates per-band
PRISM_DATASET_FILENAME STRING_LIST

List of original filenames for each band
PRISM_DATASET_TYPE STRING_LIST

List of dataset types per-band
PRISM_DATASET_VERSION STRING_LIST

List of dataset versions per-band e.g: D1 or D2 for daily products; M1, M2 or M3 for monthly products.
PRISM_DATASET_RELEASE_NUMBER STRING

An integer (1-7), stored as a string, indicating how many times a grid has been re-modeled in the 6-month window. Grids are considered stable after 6 months.

Terms of Use

Terms of Use

These PRISM datasets are available without restriction on use or distribution. PRISM Climate Group does request that the user give proper attribution and identify PRISM, where applicable, as the source of the data.

Citations

Citations:

DOIs

Explore with Earth Engine

Code Editor (JavaScript)

var dataset = ee.ImageCollection('OREGONSTATE/PRISM/AN81m')
                  .filter(ee.Filter.date('2018-07-01', '2018-07-31'));
var precipitation = dataset.select('ppt');
var precipitationVis = {
  min: 0.0,
  max: 300.0,
  palette: ['red', 'yellow', 'green', 'cyan', 'purple'],
};
Map.setCenter(-100.55, 40.71, 4);
Map.addLayer(precipitation, precipitationVis, 'Precipitation');
Open in Code Editor
The PRISM daily and monthly datasets are gridded climate datasets for the conterminous United States, produced by the PRISM Climate Group at Oregon State University. Grids are developed using PRISM (Parameter-elevation Regressions on Independent Slopes Model). PRISM interpolation routines simulate how weather and climate vary with elevation, and account for …
OREGONSTATE/PRISM/AN81m, climate,geophysical,monthly,oregonstate,precipitation,pressure,prism,temperature,vapor,weather
1895-01-01T00:00:00Z/2025-09-01T00:00:00Z
24 -125 50 -66
Google Earth Engine