Spokane climate

Spokane Weather in September

NOAA 1991-2020 normals for Spokane Intl AP, 8.6 km from Spokane

Average highs run from 79°F on September 1 to 67°F on September 30, and lows from 53°F to 44°F. Normal precipitation for the month is 0.58 in over about 5 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 Spokane, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
74°F
Average low
49°F
Precipitation
0.58 in
Snowfall
0.1 in
Record high
103°FSep 2, 2025
Record low
26°FSep 23, 2000
Chance of a freeze
12%
Days of 90°F or more
1.4
Daylight
13 h 22 min to 11 h 43 min
Cloud cover
48%
Humidity
54%
Dew point
41°F
Wind
6.9 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 179°F53°F102°F 202537°F 199913%0%
Sep 279°F53°F103°F 202538°F 199913%0%
Sep 378°F52°F102°F 202541°F 199913%0%
Sep 478°F52°F97°F 202540°F 201514%0%
Sep 578°F52°F98°F 202442°F 202614%0%
Sep 677°F52°F97°F 202441°F 200114%0%
Sep 777°F51°F99°F 202438°F 199914%0%
Sep 877°F51°F94°F 201139°F 199914%0%
Sep 976°F51°F95°F 201137°F 200015%0%
Sep 1076°F50°F95°F 201143°F 200715%0%
Sep 1176°F50°F94°F 201137°F 201215%0%
Sep 1275°F50°F92°F 201135°F 201415%0%
Sep 1375°F50°F92°F 201337°F 201616%0%
Sep 1475°F49°F93°F 201338°F 201616%0%
Sep 1574°F49°F91°F 201336°F 200616%0%
Sep 1674°F49°F93°F 200937°F 201717%0%
Sep 1773°F48°F91°F 200841°F 201717%0%
Sep 1873°F48°F90°F 202540°F 201817%0%
Sep 1973°F48°F91°F 200839°F 200417%0%
Sep 2072°F47°F88°F 202538°F 200418%0%
Sep 2172°F47°F89°F 201436°F 200518%0%
Sep 2271°F47°F87°F 199931°F 200018%0%
Sep 2371°F46°F91°F 200126°F 200018%0%
Sep 2470°F46°F94°F 201132°F 200019%0%
Sep 2570°F46°F85°F 200133°F 200019%0%
Sep 2669°F45°F87°F 202236°F 199919%0%
Sep 2769°F45°F92°F 202232°F 199920%1%
Sep 2868°F45°F87°F 202530°F 199920%1%
Sep 2968°F44°F84°F 200635°F 200720%1%
Sep 3067°F44°F83°F 200835°F 199921%1%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Spokane, in percent, and of at least 0.1 inch of snowfall.05101520251102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (PDT).

September 1
sunrise 6:08 AM, sunset 7:30 PM
September 30
sunrise 6:48 AM, sunset 6:31 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00024157 (Spokane Intl AP), public domain. Records: NOAA GHCN-Daily, station USW00094176, 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.