PRISM

Datasets:

• PRISM (daily and monthly aggregations)

Description: Gridded climate datasets for the conterminous United States

Organization: Oregon State University

Website: PRISM Website

Google Earth Engine Catalog: 

• PRISM DAILY Info (OREGONSTATE/PRISM/AN81d)
• PRISM MONTHLY Info (OREGONSTATE/PRISM/AN81m)

Spatial resolution: 4-km grid (1/24-deg)

Time Span: 1981 to Present (updated every day)

Variables:

• Minimum/Maximum/Mean Temperature
• Mean Dew Point Temperature
• Precipitation
• Minimum/Maximum Vapor Pressure Deficit
• Potential Evapotranspiration (Hargreaves method)
• Potential Water Deficit (precipitation minus potential evapotranspiration)
• Standardized precipitation index (SPI)
• Evaporative Drought Demand Index (EDDI) utilizing the Hargreaves PET
• Standardized precipitation evapotranspiration index (SPEI)

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.

References:

• Daly, C., Halbleib, M., Smith, J.I., Gibson, W.P., Doggett, M.K., Taylor, G.H., Curtis, J., and Pasteris, P.A. 2008. Physiographically-sensitive mapping of temperature and precipitation across the conterminous United States. International Journal of Climatology, 28: 2031-2064.(PDF)
• Daly, C., J.I. Smith, and K.V. Olson. 2015. Mapping atmospheric moisture climatologies across the conterminous United States. PloS ONE 10(10):e0141140. doi:10.1371/journal.pone.0141140. (PDF)