Precipitation Departures

Precipitation Departure Maps

New York/Pennsylvania

New Jersey

Delaware/Maryland/Virginia/West Virginia

MARFC Basins

All MARFC Counties

Text Data

Archived Departure Data and Maps

Monthly Departure Maps

2025

New York and Pennsylvania	New Jersey	Delaware, Maryland, Virginia, West Virginia	All MARFC Counties	MARFC Basins
January	January	January	January	January
February	February	February	February	February
March	March	March	March	March
April	April	April	April	April
May	May	May	May	May
June	June	June	June	June
July	July	July	July	July
August	August	August	August	August
September	September	September	September	September
October	October	October	October	October
November	November	November	November	November
December	December	December	December	December

New York and Pennsylvania	New Jersey	Delaware, Maryland, Virginia, West Virginia	All MARFC Counties	MARFC Basins
January	January	January	January	January
February	February	February	February	February
March	March	March	March	March
April	April	April	April	April
May	May	May	May	May
June	June	June	June	June
July	July	July	July	July
August	August	August	August	August
September	September	September	September	September
October	October	October	October	October
November	November	November	November	November
December	December	December	December	December

New York and Pennsylvania	New Jersey	Delaware, Maryland, Virginia, West Virginia	All MARFC Counties	MARFC Basins
January	January	January	January	January
February	February	February	February	February
March	March	March	March	March
April	April	April	April	April
May	May	May	May	May
June	June	June	June	June
July	July	July	July	July
August	August	August	August	August
September	September	September	September	September
October	October	October	October	October
November	November	November	November	November
December	December	December	December	December

For data before 2023, please contact the webmaster.

MARFC's county departure maps date back to August 1995, and our basin departure maps date back to January 2007.

Monthly Departure Text

2025

For data before 2023, please contact the webmaster.

Text data files begin February 1998

The county and basin "normal" precipitation values are derived from data generated by the PRISM (Parameter-elevation Regressions on Independent Slopes Model) Climate Group at Oregon State University.