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Climate
Statistics · City
Normal high in September in Mesa
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 · Tempe Asu weather station, 8 km away
70°
41°
Jan
73°
43°
Feb
80°
48°
Mar
87°
54°
Apr
94°
62°
May
103°
70°
Jun
105°
78°
Jul
104°
77°
Aug
100°
71°
Sep
91°
59°
Oct
79°
47°
Nov
69°
40°
Dec
1.0
1.1
0.9
0.2
0.2
0.1
1.0
1.3
0.7
0.6
0.6
0.8
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
East Valley in numbers
Average daily high
88 °F
1991–2020
Average daily low
57 °F
1991–2020
Normal annual rainfall
8.6 in
1991–2020
Hot days (30 °C / 86 °F or more)
206
1991–2020
Rainy days
26
1991–2020
Average annual temperature
72 °F
2023
Annual precipitation
12.4 in
2025
CO₂ emissions per person
13.6
2024 · United States