McNary Weather in September
Average highs run from 76°F on September 1 to 69°F on September 30, and lows from 50°F to 41°F. Normal precipitation for the month is 2.22 in over about 10 wet days.
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
- 73°F
- Average low
- 46°F
- Precipitation
- 2.22 in
- Record high
- 93°FSep 5, 2020
- Record low
- 25°FSep 24, 1968
- Chance of a freeze
- 13%
- Daylight
- 12 h 52 min to 11 h 52 min
- Cloud cover
- 38%
- Humidity
- 50%
- Dew point
- 43°F
- Wind
- 6.3 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 | 76°F | 50°F | 92°F 1974 | 46°F 1975 | 45% | 0% |
| Sep 2 | 76°F | 50°F | 90°F 1982 | 42°F 1973 | 45% | 0% |
| Sep 3 | 76°F | 50°F | 91°F 2019 | 42°F 1966 | 44% | 0% |
| Sep 4 | 75°F | 49°F | 91°F 2020 | 41°F 1966 | 43% | 0% |
| Sep 5 | 75°F | 49°F | 93°F 2020 | 41°F 1973 | 42% | 0% |
| Sep 6 | 75°F | 49°F | 93°F 1979 | 41°F 2004 | 42% | 0% |
| Sep 7 | 75°F | 49°F | 93°F 2020 | 43°F 1981 | 41% | 0% |
| Sep 8 | 75°F | 48°F | 89°F 1977 | 42°F 1970 | 40% | 0% |
| Sep 9 | 75°F | 48°F | 90°F 1974 | 41°F 2001 | 39% | 0% |
| Sep 10 | 74°F | 48°F | 89°F 1974 | 36°F 2020 | 38% | 0% |
| Sep 11 | 74°F | 48°F | 89°F 1971 | 38°F 1986 | 37% | 0% |
| Sep 12 | 74°F | 47°F | 90°F 1990 | 38°F 1985 | 37% | 0% |
| Sep 13 | 74°F | 47°F | 89°F 1990 | 40°F 1968 | 36% | 0% |
| Sep 14 | 74°F | 47°F | 91°F 2000 | 37°F 1967 | 35% | 0% |
| Sep 15 | 73°F | 47°F | 89°F 2000 | 37°F 1967 | 34% | |
| Sep 16 | 73°F | 46°F | 88°F 2000 | 37°F 1970 | 33% | |
| Sep 17 | 73°F | 46°F | 88°F 2002 | 28°F 1968 | 32% | |
| Sep 18 | 73°F | 46°F | 88°F 2018 | 29°F 1968 | 31% | |
| Sep 19 | 72°F | 45°F | 86°F 2010 | 36°F 2003 | 30% | |
| Sep 20 | 72°F | 45°F | 86°F 2005 | 28°F 1971 | 29% | |
| Sep 21 | 72°F | 45°F | 84°F 2001 | 33°F 2006 | 29% | |
| Sep 22 | 72°F | 44°F | 85°F 2001 | 33°F 2004 | 28% | |
| Sep 23 | 71°F | 44°F | 86°F 1982 | 27°F 1968 | 27% | |
| Sep 24 | 71°F | 44°F | 86°F 1982 | 25°F 1968 | 26% | |
| Sep 25 | 71°F | 43°F | 86°F 2020 | 31°F 1968 | 26% | |
| Sep 26 | 70°F | 43°F | 86°F 1969 | 36°F 2017 | 25% | |
| Sep 27 | 70°F | 43°F | 88°F 2024 | 30°F 1970 | 24% | |
| Sep 28 | 70°F | 42°F | 90°F 2024 | 29°F 1970 | 24% | |
| Sep 29 | 69°F | 42°F | 86°F 2010 | 29°F 1974 | 23% | |
| Sep 30 | 69°F | 41°F | 88°F 2024 | 34°F 1974 | 23% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (MST).
- September 1
- sunrise 5:53 AM, sunset 6:45 PM
- September 30
- sunrise 6:13 AM, sunset 6:05 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00025412 (Mc Nary 2N), public domain. Records: NOAA GHCN-Daily, station USC00027855, 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 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.