PRISM Monthly Spatial Climate Dataset AN81m

Dataset Availability
1895-01-01 - Present
Dataset Provider
Earth Engine Snippet
precipitation climate weather temperature geophysical vapor pressure monthly monthly prism oregonstate


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.


  • 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


2.5 arc minutes

Y Resolution
2.5 arc minutes


Name Units Min Max Description
ppt mm 0* 2639.82*

Monthly total precipitation (including rain and melted snow)

tmean °C -30.8* 41.49*

Monthly average of daily mean temperature (calculated as (tmin+tmax)/2)

tmin °C -35.11* 34.72*

Monthly minimum temperature

tmax °C -29.8* 49.74*

Monthly average of daily maximum temperature

tdmean °C -30.7* 26.76*

Monthly average of daily mean dew point temperature

vpdmin hPa 0* 44.79*

Monthly average of daily minimum vapor pressure deficit

vpdmax hPa 0.009* 110.06*

Monthly average of daily maximum vapor pressure deficit

* estimated min or max value

Image Properties

Image Properties

Name Type Description

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"


List of original creation dates per-band


List of original filenames for each band


List of dataset types per-band


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

status STRING

Data generated within 30 days of observation have the status "early". Data generated within 1-6 months of observation may have the status "provisional" and data older than 6 months are marked as "permanent".

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.


Explore in Earth Engine

var dataset = ee.ImageCollection('OREGONSTATE/PRISM/AN81m')
                  .filter('2018-07-01', '2018-07-31'));
var precipitation ='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');

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