Portland climate

Portland Weather in September

NOAA 1991-2020 normals for Corpus Christi NWS, 20.9 km from Portland

Average highs run from 91°F on September 1 to 87°F on September 30, and lows from 75°F to 70°F. Normal precipitation for the month is 5.36 in over about 10 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 Portland, in °F, with the record for each date.5060708090100110151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
89°F
Average low
73°F
Precipitation
5.36 in
Record high
101°FSep 5, 2000
Record low
57°FSep 22, 1995
Chance of a freeze
0%
Days of 90°F or more
18.5
Daylight
12 h 42 min to 11 h 54 min
Cloud cover
47%
Humidity
74%
Dew point
71°F
Wind
8.7 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 191°F75°F97°F 200873°F 198728%0%
Sep 291°F75°F95°F 202372°F 200429%0%
Sep 391°F75°F100°F 201173°F 200429%0%
Sep 491°F74°F97°F 201173°F 199630%0%
Sep 591°F74°F101°F 200075°F 200630%0%
Sep 690°F74°F95°F 202371°F 198831%0%
Sep 790°F74°F94°F 202372°F 200431%0%
Sep 890°F74°F97°F 202373°F 198631%0%
Sep 990°F74°F95°F 202372°F 199431%0%
Sep 1090°F74°F94°F 202371°F 199432%0%
Sep 1190°F73°F97°F 202370°F 198832%0%
Sep 1290°F73°F94°F 200870°F 200332%0%
Sep 1389°F73°F96°F 202370°F 201432%0%
Sep 1489°F73°F96°F 202369°F 198932%0%
Sep 1589°F73°F95°F 202364°F 199332%0%
Sep 1689°F73°F95°F 202368°F 200832%0%
Sep 1789°F72°F95°F 202369°F 200832%0%
Sep 1889°F72°F94°F 202371°F 200832%0%
Sep 1989°F72°F93°F 199766°F 199131%0%
Sep 2089°F72°F93°F 199765°F 199131%0%
Sep 2188°F72°F95°F 202367°F 199131%0%
Sep 2288°F72°F96°F 200557°F 199530%0%
Sep 2388°F71°F97°F 200559°F 199530%0%
Sep 2488°F71°F99°F 200562°F 198930%0%
Sep 2588°F71°F95°F 202362°F 198929%0%
Sep 2688°F71°F95°F 202359°F 200029%0%
Sep 2788°F71°F96°F 202365°F 200029%0%
Sep 2887°F71°F95°F 202361°F 199628%0%
Sep 2987°F70°F94°F 199863°F 199928%0%
Sep 3087°F70°F93°F 202365°F 199228%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Portland, in percent, and of at least 0.1 inch of snowfall.0102030401102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CDT).

September 1
sunrise 7:08 AM, sunset 7:50 PM
September 30
sunrise 7:22 AM, sunset 7:16 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00412011 (Corpus Christi NWS), public domain. Records: NOAA GHCN-Daily, station USC00417170, 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.