State of Climate Adaptation
VILLAGE OF SILVERTON
APPENDIX OF CLIMATE DATA

APRIL 2020
DECEMBER 2019

Photo: Jesse Schpakowski

Contents
Figure A-1: Historic and projected average annual temperature ....................................................................................... 2
Figure A-2: Historic and projected average spring temperature ........................................................................................ 2
Figure A-3: Historic and projected average summer temperature ..................................................................................... 2
Figure A-4: Historic and projected average fall temperature............................................................................................. 3
Figure A-5: Historic and projected average winter temperature ........................................................................................ 3
Figure A-6: Historic and projected annual number of days over 30o C ............................................................................. 3
Figure A-7: Historic and projected number of summer days over 30o C ........................................................................... 4
Figure A-8: Historic and projected annual number of days with maximum temperature over 90th percentile in the 19611990 period ......................................................................................................................................................................... 4
Figure A-9: Historic and projected annual number of daily freeze-thaw cycles ............................................................... 4
Figure A-10: Historic and projected number of daily freeze-thaw cycles in winter .......................................................... 5
Figure A-11: Historic and projected growing season length ............................................................................................. 5
Figure A-12: Historic and projected growing degree days ................................................................................................ 5
Figure A-13: Historic and projected total annual precipitation ......................................................................................... 6
Figure A-14: Historic and projected total spring precipitation .......................................................................................... 6
Figure A-15: Historic and projected total summer precipitation ....................................................................................... 6
Figure A-16: Historic and projected total fall precipitation ............................................................................................... 7
Figure A-17: Historic and projected total winter precipitation .......................................................................................... 7
Figure A-18: Historic and projected maximum 1-day precipitation .................................................................................. 7
Figure A-19: Historic and projected maximum dry spell length ....................................................................................... 8
Figure A-20: Historic and projected annual precipitation above the 95th percentile in the 1961-1990 period .................. 8
Figure A-21: Historic and projected number of days of precipitation above the 95th percentile in the 1961-1990 period 8

This appendix provides additional climate data to accompany the State of Climate Adaptation report for the Village of
Silverton. Please refer to the full report for more detail.

1

Figure A-1: Historic and
projected average annual
temperature

Figure A-2: Historic and
projected average spring
temperature

Figure A-3: Historic and
projected average summer
temperature

2

Figure A-4: Historic and
projected average fall
temperature

Figure A-5: Historic and
projected average winter
temperature

Figure A-6: Historic and
projected annual number of days
over 30o C

3

Figure A-7: Historic and
projected number of summer
days over 30o C

Figure A-8: Historic and
projected annual number of days
with maximum temperature over
90th percentile in the 1961-1990
period

Figure A-9: Historic and
projected annual number of daily
freeze-thaw cycles

4

Figure A-10: Historic and
projected number of daily freezethaw cycles in winter

Figure A-11: Historic and
projected growing season length

Figure A-12: Historic and
projected growing degree days

5

Figure A-13: Historic and
projected total annual
precipitation

Figure A-14: Historic and
projected total spring
precipitation

Figure A-15: Historic and
projected total summer
precipitation

6

Figure A-16: Historic and
projected total fall precipitation

Figure A-17: Historic and
projected total winter
precipitation

Figure A-18: Historic and
projected maximum 1-day
precipitation

7

Figure A-19: Historic and
projected maximum dry spell
length

Figure A-20: Historic and
projected annual precipitation
above the 95th percentile in the
1961-1990 period

Figure A-21: Historic and
projected number of days of
precipitation above the 95th
percentile in the 1961-1990
period

8