Sandy climate

Sandy Weather in December

NOAA 1991-2020 normals for Headworks Portland Wtr B, 10.1 km from Sandy

Average highs run from 45°F on December 1 to 43°F on December 31, and lows from 37°F to 35°F. Normal precipitation for the month is 11.67 in over about 23 wet days.

December day by day

The normal high and low for each date, and the record, in °F.

Normal daily high and low temperature at Sandy, in °F, with the record for each date.020406080151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

December at a glance

Average high
43°F
Average low
35°F
Precipitation
11.67 in
Snowfall
0.6 in
Record high
69°FDec 4, 2023
Record low
13°FDec 9, 2013
Chance of a freeze
98%
Daylight
8 h 59 min to 8 h 47 min
Cloud cover
78%
Humidity
92%
Dew point
35°F
Wind
6.5 mph

Every day of the month

A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.

DateNormal highNormal lowRecord highRecord lowChance wetChance of snow
Dec 145°F37°F65°F 202129°F 201473%1%
Dec 245°F37°F56°F 200827°F 201473%1%
Dec 344°F36°F62°F 202326°F 201373%1%
Dec 444°F36°F69°F 202325°F 200973%1%
Dec 544°F36°F65°F 202322°F 200973%1%
Dec 644°F36°F60°F 202324°F 201373%1%
Dec 744°F36°F62°F 201520°F 201373%1%
Dec 844°F36°F64°F 201515°F 201374%1%
Dec 943°F36°F60°F 200413°F 201374%1%
Dec 1043°F35°F65°F 202523°F 200974%2%
Dec 1143°F35°F65°F 201421°F 200974%2%
Dec 1243°F35°F62°F 201027°F 201174%2%
Dec 1343°F35°F58°F 201020°F 200974%2%
Dec 1443°F35°F63°F 200223°F 200874%2%
Dec 1543°F35°F61°F 200621°F 200874%2%
Dec 1643°F35°F61°F 202520°F 200874%2%
Dec 1743°F35°F59°F 199921°F 200874%2%
Dec 1843°F35°F58°F 201827°F 200574%2%
Dec 1943°F35°F59°F 201923°F 199874%2%
Dec 2043°F35°F60°F 201416°F 199874%2%
Dec 2143°F35°F63°F 202017°F 200874%2%
Dec 2243°F35°F56°F 201419°F 199874%2%
Dec 2343°F35°F55°F 202419°F 202274%2%
Dec 2443°F35°F53°F 202423°F 199874%2%
Dec 2543°F34°F63°F 200526°F 200873%2%
Dec 2643°F34°F56°F 202428°F 201173%2%
Dec 2743°F35°F57°F 202228°F 202173%2%
Dec 2843°F35°F58°F 201125°F 200673%2%
Dec 2943°F35°F57°F 199827°F 202173%2%
Dec 3043°F35°F55°F 199826°F 201073%2%
Dec 3143°F35°F53°F 202026°F 202173%2%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Sandy, in percent, and of at least 0.1 inch of snowfall.0204060801102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (PST).

December 1
sunrise 7:29 AM, sunset 4:28 PM
December 31
sunrise 7:49 AM, sunset 4:36 PM

Every day of December: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00353770 (Headworks Portland Wtr B), public domain. Records: NOAA GHCN-Daily, station USW00024242, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.