Sandy climate

Sandy Weather in September

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

Average highs run from 75°F on September 1 to 67°F on September 30, and lows from 53°F to 48°F. Normal precipitation for the month is 3.42 in over about 9 wet days.

September 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

September at a glance

Average high
72°F
Average low
51°F
Precipitation
3.42 in
Record high
98°FSep 2, 2017
Record low
37°FSep 27, 1999
Chance of a freeze
0%
Days of 90°F or more
1.5
Daylight
13 h 15 min to 11 h 45 min
Cloud cover
49%
Humidity
68%
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
Sep 175°F53°F94°F 199844°F 199923%0%
Sep 275°F53°F98°F 201743°F 200823%0%
Sep 375°F53°F96°F 202046°F 199924%0%
Sep 475°F53°F95°F 200345°F 201424%0%
Sep 575°F52°F98°F 202446°F 200224%0%
Sep 675°F52°F96°F 202444°F 200225%0%
Sep 774°F52°F93°F 201143°F 199926%0%
Sep 874°F52°F89°F 200843°F 200226%0%
Sep 974°F52°F91°F 201145°F 200727%0%
Sep 1074°F52°F95°F 201344°F 200827%0%
Sep 1173°F52°F98°F 201342°F 201228%0%
Sep 1273°F52°F89°F 201544°F 201229%0%
Sep 1373°F51°F91°F 199944°F 200329%0%
Sep 1473°F51°F91°F 200045°F 201630%0%
Sep 1572°F51°F95°F 202344°F 200331%0%
Sep 1672°F51°F89°F 200841°F 202131%0%
Sep 1772°F51°F89°F 201246°F 199932%0%
Sep 1871°F51°F94°F 199941°F 200533%0%
Sep 1971°F51°F94°F 199942°F 200533%0%
Sep 2071°F50°F92°F 201444°F 200134%0%
Sep 2170°F50°F89°F 199940°F 200534%0%
Sep 2270°F50°F88°F 199939°F 200035%0%
Sep 2370°F50°F88°F 200238°F 200836%0%
Sep 2469°F50°F93°F 202438°F 200536%0%
Sep 2569°F49°F90°F 202238°F 200537%0%
Sep 2668°F49°F91°F 202239°F 200538%0%
Sep 2768°F49°F93°F 200337°F 199938%0%
Sep 2868°F49°F85°F 201739°F 200539%0%
Sep 2967°F49°F84°F 202042°F 199940%0%
Sep 3067°F48°F83°F 200141°F 201941%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.010203040501102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (PDT).

September 1
sunrise 6:31 AM, sunset 7:46 PM
September 30
sunrise 7:06 AM, sunset 6:51 PM

Every day of September: 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.