Oak Grove climate

Oak Grove Weather in September

NOAA 1991-2020 normals for Oregon City, 7.3 km from Oak Grove

Average highs run from 82°F on September 1 to 73°F on September 30, and lows from 56°F to 50°F. Normal precipitation for the month is 1.64 in.

September day by day

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

Normal daily high and low temperature at Oak Grove, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
78°F
Average low
53°F
Precipitation
1.64 in
Record high
105°FSep 2, 1988
Record low
34°FSep 17, 1965
Chance of a freeze
0%
Days of 90°F or more
2.7
Daylight
13 h 16 min to 11 h 44 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 182°F56°F98°F 198844°F 19730%
Sep 282°F55°F105°F 198842°F 19600%
Sep 381°F55°F95°F 201745°F 19800%
Sep 481°F55°F98°F 195543°F 19560%
Sep 581°F55°F102°F 202444°F 19560%
Sep 681°F55°F97°F 195845°F 19600%
Sep 781°F55°F99°F 198142°F 19920%
Sep 880°F54°F93°F 199342°F 19600%
Sep 980°F54°F94°F 194842°F 19620%
Sep 1080°F54°F98°F 194442°F 19520%
Sep 1180°F54°F95°F 201343°F 19640%
Sep 1279°F54°F92°F 194541°F 19550%
Sep 1379°F54°F93°F 198837°F 19700%
Sep 1479°F53°F92°F 193842°F 19690%
Sep 1579°F53°F96°F 198140°F 19700%
Sep 1678°F53°F92°F 199441°F 19650%
Sep 1778°F53°F94°F 193834°F 19650%
Sep 1878°F53°F93°F 199136°F 19650%
Sep 1977°F52°F93°F 197439°F 19570%
Sep 2077°F52°F96°F 195239°F 19570%
Sep 2177°F52°F94°F 195239°F 19640%
Sep 2276°F52°F93°F 195234°F 19610%
Sep 2376°F52°F94°F 197440°F 20000%
Sep 2475°F51°F96°F 197436°F 19700%
Sep 2575°F51°F94°F 199138°F 19550%
Sep 2674°F51°F92°F 196738°F 19610%
Sep 2774°F51°F95°F 200337°F 19450%
Sep 2874°F50°F89°F 198937°F 19830%
Sep 2973°F50°F89°F 198737°F 19540%
Sep 3073°F50°F88°F 198735°F 19540%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Oak Grove, in percent, and of at least 0.1 inch of snowfall.00.21102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (PDT).

September 1
sunrise 6:32 AM, sunset 7:48 PM
September 30
sunrise 7:08 AM, sunset 6:52 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00356334 (Oregon City), public domain. Records: NOAA GHCN-Daily, station USW00024229, 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.