Sandy climate

Sandy Weather in May

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

Average highs run from 61°F on May 1 to 66°F on May 31, and lows from 43°F to 48°F. Normal precipitation for the month is 5.72 in over about 16 wet days.

May 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.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

May at a glance

Average high
64°F
Average low
46°F
Precipitation
5.72 in
Record high
96°FMay 22, 2001
Record low
34°FMay 1, 2013
Chance of a freeze
3%
Daylight
14 h 19 min to 15 h 24 min
Cloud cover
70%
Humidity
82%
Dew point
48°F
Wind
4.5 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
May 161°F43°F88°F 201434°F 201358%0%
May 261°F43°F88°F 201634°F 200658%0%
May 362°F43°F91°F 202636°F 200657%0%
May 462°F44°F85°F 201735°F 200257%0%
May 562°F44°F84°F 201335°F 200756%0%
May 662°F44°F84°F 201337°F 200056%0%
May 763°F44°F86°F 201637°F 200055%0%
May 863°F44°F80°F 200734°F 200255%0%
May 963°F45°F84°F 201535°F 200654%0%
May 1063°F45°F92°F 202434°F 199954%0%
May 1163°F45°F91°F 202436°F 201253%0%
May 1264°F45°F89°F 202337°F 201153%0%
May 1364°F45°F92°F 202336°F 202253%0%
May 1464°F45°F90°F 202338°F 200753%0%
May 1564°F46°F92°F 202338°F 200252%0%
May 1664°F46°F90°F 200838°F 200252%0%
May 1765°F46°F92°F 200839°F 200352%0%
May 1865°F46°F85°F 202339°F 200352%0%
May 1965°F46°F84°F 200838°F 200352%0%
May 2065°F46°F82°F 202339°F 200151%0%
May 2165°F47°F86°F 200140°F 200951%0%
May 2265°F47°F96°F 200143°F 199951%0%
May 2365°F47°F89°F 200139°F 200551%0%
May 2466°F47°F80°F 199941°F 200550%0%
May 2566°F47°F84°F 202345°F 200550%0%
May 2666°F47°F88°F 200539°F 199950%0%
May 2766°F47°F90°F 200545°F 199950%0%
May 2866°F47°F93°F 202044°F 200149%0%
May 2966°F48°F88°F 200937°F 200149%0%
May 3066°F48°F89°F 200741°F 199949%0%
May 3166°F48°F94°F 200141°F 202649%0%

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.02040601102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (PDT).

May 1
sunrise 5:57 AM, sunset 8:16 PM
May 31
sunrise 5:25 AM, sunset 8:49 PM

Every day of May: 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.