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Climate
Statistics · City
Normal high in September in Spokane Valley
1991–2020 · 1 data point
Updated Oct 21, 2026
Source: NOAA National Centers for Environmental Information — GHCN-Daily, 1991–2020
Weather through the year long-term average 1991–2020 · Spokane Intl Ap weather station, 22 km away
35°
24°
Jan
40°
26°
Feb
49°
31°
Mar
57°
36°
Apr
67°
44°
May
74°
50°
Jun
84°
57°
Jul
84°
56°
Aug
74°
48°
Sep
58°
37°
Oct
42°
29°
Nov
34°
24°
Dec
2.0
1.4
1.8
1.3
1.5
1.2
0.4
0.5
0.6
1.4
2.1
2.3
High and low, °F
Precipitation, inches
Source: NOAA National Centers for Environmental Information — GHCN-Daily, 1991–2020
What it means
The typical daytime high in September.
How it is calculated
Average daily maximum in September at the nearest weather station with a long record: 1991–2020, or the latest ten years.
Climate
Spokane Valley in numbers
Average daily high
58 °F
1991–2020
Average daily low
38 °F
1991–2020
Normal annual rainfall
16.5 in
1991–2020
Hot days (30 °C / 86 °F or more)
37
1991–2020
Rainy days
80
1991–2020
Average annual temperature
51 °F
2025
Annual precipitation
14.9 in
2025
CO₂ emissions per person
13.6
2024 · United States