Mountain Mesa Weather in September
Average highs run from 96°F on September 1 to 86°F on September 30, and lows from 59°F to 49°F.
September day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
September at a glance
- Average high
- 91°F
- Average low
- 55°F
- Record high
- 99°FSep 5, 2020
- Record low
- 29°FSep 25, 2007
- Chance of a freeze
- 0%
- Days of 90°F or more
- 20.0
- Daylight
- 12 h 55 min to 11 h 51 min
- Cloud cover
- 17%
- Humidity
- 32%
- Dew point
- 38°F
- Wind
- 5.6 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.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| Sep 1 | 96°F | 59°F | 98°F 2017 | 43°F 1999 | 0% | |
| Sep 2 | 96°F | 59°F | 95°F 2025 | 47°F 2010 | 0% | |
| Sep 3 | 96°F | 58°F | 98°F 2017 | 46°F 2021 | 0% | |
| Sep 4 | 95°F | 58°F | 98°F 2017 | 43°F 2004 | 0% | |
| Sep 5 | 95°F | 58°F | 99°F 2020 | 43°F 2016 | 0% | |
| Sep 6 | 95°F | 58°F | 93°F 2019 | 39°F 2000 | 0% | |
| Sep 7 | 94°F | 57°F | 92°F 2008 | 42°F 2002 | 0% | |
| Sep 8 | 94°F | 57°F | 98°F 2021 | 44°F 2025 | 0% | |
| Sep 9 | 94°F | 57°F | 98°F 2021 | 41°F 2002 | 0% | |
| Sep 10 | 94°F | 57°F | 95°F 2021 | 38°F 2010 | 0% | |
| Sep 11 | 93°F | 56°F | 89°F 2000 | 43°F 1998 | 0% | |
| Sep 12 | 93°F | 56°F | 92°F 2009 | 39°F 2005 | 0% | |
| Sep 13 | 93°F | 56°F | 92°F 2009 | 39°F 2005 | 0% | |
| Sep 14 | 92°F | 56°F | 95°F 2021 | 36°F 2016 | 0% | |
| Sep 15 | 92°F | 55°F | 90°F 2002 | 38°F 2016 | 0% | |
| Sep 16 | 92°F | 55°F | 94°F 2000 | 37°F 2006 | 0% | |
| Sep 17 | 91°F | 55°F | 91°F 2000 | 37°F 2006 | 0% | |
| Sep 18 | 91°F | 54°F | 91°F 2000 | 39°F 2003 | 0% | |
| Sep 19 | 90°F | 54°F | 92°F 2000 | 42°F 2004 | 0% | |
| Sep 20 | 90°F | 54°F | 94°F 2000 | 37°F 2019 | 0% | |
| Sep 21 | 90°F | 53°F | 90°F 2000 | 35°F 2004 | 0% | |
| Sep 22 | 89°F | 53°F | 90°F 2002 | 35°F 2004 | 0% | |
| Sep 23 | 89°F | 52°F | 91°F 2002 | 35°F 2019 | 0% | |
| Sep 24 | 88°F | 52°F | 90°F 2002 | 35°F 2007 | 0% | |
| Sep 25 | 88°F | 52°F | 89°F 2015 | 29°F 2007 | 0% | |
| Sep 26 | 88°F | 51°F | 92°F 2003 | 37°F 2017 | 0% | |
| Sep 27 | 87°F | 51°F | 93°F 2003 | 33°F 2013 | 0% | |
| Sep 28 | 87°F | 50°F | 91°F 2003 | 35°F 2013 | 0% | |
| Sep 29 | 86°F | 50°F | 93°F 2010 | 37°F 2019 | 0% | |
| Sep 30 | 86°F | 49°F | 89°F 2001 | 39°F 2014 | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (PDT).
- September 1
- sunrise 6:26 AM, sunset 7:21 PM
- September 30
- sunrise 6:48 AM, sunset 6:39 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00048407 (S Lake Fs), public domain. Records: NOAA GHCN-Daily, station USC00048829, 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.