PLYMOUTH

OTIS

LEE

WARE

BARRE

BECKET

PETERSHAM

SAVOY

BOSTON

ATHOL

TAUNTON

MONSON

COLRAIN

NEW SALEM

DARTMOUTH

CARVER

PERU

BARNSTABLE

WESTPORT

SHEFFIELD

HOLDEN

BLANDFORD

CONWAY

FALMOUTH

REHOBOTH

SUTTON

ORANGE

WESTFIELD

ASHFIELD

CHARLTON

SANDISFIELD

MIDDLEBOROUGH

PALMER

SANDWICH

DOUGLAS

CHESTER

GROTON

ROWE

WARWICK

GRANVILLE

RUTLAND

NANTUCKET

HEATH

HARDWICK

PITTSFIELD

BOURNE

HAWLEY

WINDSOR

IPSWICH

WAREHAM

HANCOCK

BELCHERTOWN

EASTON

TOLLAND

ASHBY

SPENCER

ROYALSTON

FALL RIVER

LAKEVILLE

GILL

NORTON

WENDELL

GRANBY

LUDLOW

BRIMFIELD

ANDOVER

HAVERHILL

PELHAM

ADAMS

OXFORD

LENOX

STERLING

WINCHENDON

WARREN

UPTON

FREETOWN

HADLEY

PRINCETON

TRURO

STOW

WILLIAMSTOWN

DEERFIELD

STURBRIDGE

WORCESTER

ACTON

ASHBURNHAM

ROCHESTER

UXBRIDGE

SHARON

TOWNSEND

FLORIDA

AMHERSTWASHINGTON

HARVARD

DENNIS

NORTHFIELD

DALTON

MONTAGUE

HUBBARDSTON

WESTFORD

FRANKLIN

AGAWAM

DUDLEY

CHESHIRE

TEMPLETON

MASHPEE

SOUTHWICK

BILLERICA

DRACUT

SUDBURY

WESTMINSTER

BOLTON

CONCORD

SPRINGFIELD

BOXFORD

OAKHAM

DIGHTON

MONTEREY

FITCHBURG

HINGHAMGRAFTON

HOLYOKE

NEWBURY

HARWICH

HOPKINTON

DUXBURY

SWANSEA

LANCASTER

ATTLEBORO

METHUEN

CANTON

WALES

GARDNER

NORTHAMPTON

CHICOPEE

LEOMINSTER

NEW MARLBOROUGH

EDGARTOWN

LEYDEN

BREWSTER

YARMOUTH

MARSHFIELD

LEVERETT

GREAT BARRINGTON

NATICK

LEICESTER

LUNENBURG

WHATELY

LYNN

WALPOLE

DOVER

HINSDALE

QUINCY

NORWELL

ESSEX

HALIFAX

RAYNHAM

WORTHINGTON

PEMBROKE

NEWTON

CHESTERFIELD

ROWLEY

GOSHEN

MENDON

HUNTINGTON

SHUTESBURY

PEPPERELL

WESTON

HAMPTON

RUSSELLAUBURN

FRAMINGHAM

MILLIS

BRIDGEWATER

SEEKONK

PAXTON

WRENTHAM

SHELBURNE

BROCKTON

PHILLIPSTON

CHILMARK

ERVING

CHARLEMONT

SOUTHAMPTON

PLAINFIELD

SHIRLEY

HANSON

WILBRAHAM

MIDDLEFIELD

KINGSTON

BERLIN

BOYLSTON

BUCKLAND

BERKLEY

AYER

LOWELL

MILTON

MANSFIELD

WEST TISBURY

MARION

HATFIELD

LANESBOROUGHPEABODY

WESTHAMPTON

RICHMOND

LINCOLN

SCITUATE

GREENFIELD

ACUSHNET

WELLFLEET

BEVERLY

HOLLISTON

WILLIAMSBURG

TEWKSBURY

MILFORD

CUMMINGTON

CHELMSFORD

MILLBURY

WAYLAND

EGREMONT

LITTLETON

STOCKBRIDGE

CARLISLE

NORFOLK

NORTH ANDOVER

HANOVER

TYRINGHAM

BERNARDSTON

SHREWSBURY

WEYMOUTH

WEBSTER

HAMILTON

BELLINGHAM

ORLEANS

MEDFIELD

LEXINGTON

FOXBOROUGH

SALISBURY

SHERBORN

WOBURN

ALFORD

DANVERS

BEDFORD

DUNSTABLE

NORTH ADAMS

WALTHAM

EASTHAM

SOUTHBRIDGE

PLYMPTON

MARLBOROUGH

HOLLAND

HUDSON

ASHLAND

SAUGUS

NEW

BEDFORD

WESTBOROUGH

MEDWAY

WILMINGTON

STOUGHTON

BROOKFIELD

NEEDHAM

CHATHAM

NEW BRAINTREE

BRAINTREE

MIDDLETON

DEDHAM

AMESBURY

NORTHBRIDGE

SALEM

MONROE

SOUTH

.HADLEY

MATTAPOISETT

TOPSFIELD

FAIRHAVEN

WEST BROOKFIELD

READING

NORTHBOROUGH

GLOUCESTER

NORTH

BROOKFIELD

SUNDERLAND

TYNGSBOROUGH

MOUNT

WASHINGTON

PLAINVILLE

MONTGOMERY

ABINGTON

LYNNFIELD

NORWOOD RANDOLPH

CLARKSBURG

WESTWOOD

ROCKLAND

BURLINGTON

COHASSET

NEW ASHFORD

SOUTHBOROUGH

WEST

STOCKBRIDGE

EASTHAMPTON

WEST NEWBURY

WEST SPRINGFIELD

WENHAM

GEORGETOWN

WELLESLEY

EAST BRIDGEWATER

BLACKSTONE

MEDFORD

CLINTON

AVON

MERRIMAC

NORTHATTLEBOROUGH

NORTH READING

WEST

BOYLSTON

TISBURY

GOSNOLD

GROVELAND

WEST BRIDGEWATER

SOMERSET

WHITMAN

REVERE

BOXBOROUGH

WAKEFIELD

LAWRENCE

HOLBROOK

LONGMEADOW

EAST

LONGMEADOW

ROCKPORT

PROVINCETOWN

MALDEN

CAMBRIDGE

OAK BLUFFS

STONEHAM

BROOKLINE

GAY HEAD

EAST

BROOKFIELD

MANCHESTER

MAYNARD

NEWBURYPORT

MILLVILLE

HULL

BELMONT

HOPEDALE

MELROSE

WINCHESTER

ARLINGTON

EVERETT

SOMERVILLE

WATERTOWN

CHELSEA

SWAMPSCOTT

73°

73°

72°

72°

71°

71°

70°

70°

41°30"

70°

41°30"

42° 42°

42°30"42°30"

Average maximum monthly temperature, in degrees Fahrenheit—Based on PRISM data for 1971 to 2000. Grid resolution isapproximately 783.8 meters

47 to less than 48

46 to less than 47

45 to less than 46

44 to less than 45

43 to less than 44

42 to less than 43

Boundary—Based on USGS 1:24,000 Digital Line Graph data

StateTownCoastWatershed

EXPLANATION

25 0 25 KILOMETERS

SCALE 1:400,00025 MILES025

U.S. DEPARTMENT OF THE INTERIORU.S. GEOLOGICAL SURVEY

Base from U.S. Geological Survey digital data, 1:24,000Lambert conformal conic projection1983 North American datum

Prepared in cooperation with theMASSACHUSETTS DEPARTMENT OF ENVIRONMENTAL PROTECTION

ReferencesDaly, C., Gibson, W.P., Taylor, G.H., Johnson, G.L., Pasteris, P., 2002,A knowledge-based approach to the statistical mapping of climate:Climate Research, v. 22, p. 99–113.

PRISM Climate Group, 2006, United States average maximum monthly temperature 1971–2000: Oregon State University, http://www.prismclimate.org, created 12 June 2009

1

2

34

5

67

8

9 10

11

1213

1516

17

18 19

20

21

22

23

24

2526

27

2

17

14

14

12

19

15

9 21

14

1 - BLACKSTONE2 - BOSTON HARBOR3 - BUZZARDS BAY4 - CAPE COD5 - CHARLES6 - CHICOPEE7 - CONNECTICUT8 - DEERFIELD9 - FARMINGTON10 - FRENCH11 - HOUSATONIC12 - HUDSON13 - IPSWICH14 - ISLANDS

15 - MERRIMACK16 - MILLERS17 - NARRAGANSETT BAY18 - NASHUA19 - NORTH COASTAL20 - PARKER21 - QUINEBAUG22 - SHAWSHEEN23 - SOUTH COASTAL24 - SuAsCo25 - TAUNTON26 - TEN MILE27 - WESTFIELD

EXPLANATION

Basin Index Executive Office of Energyand Environmental Affairs100 Cambridge Street, Suite 900Boston, Massachusetts 02114

Phone: 617-626-1000Fax: 617-626-1181

MassDEP Headquarters1 Winter StreetBoston, Massachusetts 02108

Phone: 617-292-5500Fax: 617-556-1049

U.S. Geological SurveyMassachusetts-Rhode Island Water Science Center 10 Bearfoot RdNorthborough, Massachusetts 01532

Phone: 508-490-5000Fax: 508-490-5068

E N V I R O N M E N T A LP R O T E C T I O N

M a s s a c h u s e t t sD e p a r t m e n t

of

EXECUTIVE OFFICE of ENERGY

& ENVIRONMENTAL AFFAIRS

Revised May 2010

U.S. Geological Survey and the U.S. Environmental Protection Agency, National Hydrography Dataset Medium Resolution, 1:100,000, 2005;Office of Geographic and Environmental Information (MassGIS), Commonwealth of Massachusetts, Executive Office of Energy and Environmental Affairs;

U.S. Geological Survey Topographic Quadrangle Images, 1:25,000, 2001; Hydrography, 1:100,000, 2000; Community Boundaries, 1:25,000, 2002;Strahler, A.N., 1952, Hypsometric (area altitude) analysis of erosional topology: Geological Society of America Bulletin, 63, p. 1,117–1,142

SCIENTIFIC INVESTIGATIONS REPORT 2009–5227Average maximum monthly temperature—APPENDIX 1, FIGURE 1-3

Archfield, S. A., Vogel, R. M., Steeves, P. A., Brandt, S. L., Weiskel, P. K., and Garabedian, S. P., 2010The Massachusetts Sustainable-Yield Estimator:

A decision-support tool to assess water availability at ungaged stream locaions in Massachusetts

Average Maximum Monthly Temperature, in Degrees Fahrenheit, for Massachusetts as Computed over the Period 1971–2000 Using the Parameter-Elevation Regressions on Independent Slopes (PRISM) Model

ByLance J. Ostiguy, Peter K. Weiskel, and Stacey A. Archfield

2010