Vernonia climate

Vernonia Weather in September

NOAA 1991-2020 normals for Vernonia #2, 0.7 km from Vernonia

Average highs run from 76°F on September 1 to 68°F on September 30, and lows from 45°F to 41°F. Normal precipitation for the month is 1.79 in over about 8 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 Vernonia, in °F, with the record for each date.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
73°F
Average low
43°F
Precipitation
1.79 in
Record high
99°FSep 2, 2017
Record low
33°FSep 23, 2000
Chance of a freeze
46%
Days of 90°F or more
1.2
Daylight
13 h 17 min to 11 h 44 min
Cloud cover
51%
Humidity
80%
Dew point
51°F
Wind
3.8 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 176°F45°F94°F 199841°F 199919%0%
Sep 276°F45°F99°F 201745°F 201219%0%
Sep 376°F45°F96°F 201744°F 201520%0%
Sep 476°F45°F93°F 200342°F 200220%0%
Sep 576°F45°F93°F 200343°F 200221%0%
Sep 676°F44°F97°F 201443°F 201022%0%
Sep 775°F44°F95°F 201142°F 199922%0%
Sep 875°F44°F90°F 199939°F 200223%0%
Sep 975°F44°F92°F 202044°F 199823%0%
Sep 1075°F44°F93°F 200742°F 199924%0%
Sep 1175°F44°F98°F 201340°F 201224%0%
Sep 1274°F44°F89°F 201544°F 201025%0%
Sep 1374°F43°F90°F 201242°F 201625%0%
Sep 1474°F43°F94°F 202343°F 201526%0%
Sep 1574°F43°F97°F 202341°F 201527%0%
Sep 1673°F43°F91°F 202539°F 200627%0%
Sep 1773°F43°F91°F 201240°F 200528%0%
Sep 1873°F43°F90°F 199939°F 200728%0%
Sep 1973°F42°F93°F 199941°F 200529%0%
Sep 2072°F42°F95°F 201441°F 200329%0%
Sep 2172°F42°F88°F 201442°F 200430%0%
Sep 2272°F42°F92°F 200938°F 200030%0%
Sep 2371°F42°F88°F 200233°F 200031%0%
Sep 2471°F42°F90°F 202135°F 200532%0%
Sep 2570°F41°F89°F 202238°F 200532%0%
Sep 2670°F41°F89°F 201639°F 201333%0%
Sep 2770°F41°F96°F 200333°F 199933%0%
Sep 2869°F41°F88°F 201739°F 200934%0%
Sep 2969°F41°F92°F 200838°F 201935%0%
Sep 3068°F41°F83°F 202035°F 201936%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Vernonia, 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 (PDT).

September 1
sunrise 6:34 AM, sunset 7:51 PM
September 30
sunrise 7:10 AM, sunset 6:54 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00358884 (Vernonia #2), public domain. Records: NOAA GHCN-Daily, station USW00004201, 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.