Waterflow Weather in September
Average highs run from 87°F on September 1 to 77°F on September 30, and lows from 52°F to 41°F. Normal precipitation for the month is 0.95 in over about 5 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
- 82°F
- Average low
- 47°F
- Precipitation
- 0.95 in
- Record high
- 99°FSep 6, 1952
- Record low
- 27°FSep 25, 2017
- Chance of a freeze
- 34%
- Days of 90°F or more
- 3.0
- Daylight
- 12 h 57 min to 11 h 50 min
- Cloud cover
- 38%
- Humidity
- 41%
- Dew point
- 38°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.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| Sep 1 | 87°F | 52°F | 97°F 2019 | 45°F 1952 | 19% | 0% |
| Sep 2 | 87°F | 52°F | 97°F 2022 | 43°F 1956 | 19% | 0% |
| Sep 3 | 86°F | 51°F | 97°F 2019 | 42°F 1961 | 19% | 0% |
| Sep 4 | 86°F | 51°F | 97°F 1952 | 37°F 1961 | 19% | 0% |
| Sep 5 | 86°F | 51°F | 98°F 2020 | 43°F 1968 | 19% | 0% |
| Sep 6 | 86°F | 50°F | 99°F 1952 | 43°F 1948 | 19% | 0% |
| Sep 7 | 85°F | 50°F | 96°F 1952 | 42°F 1948 | 19% | 0% |
| Sep 8 | 85°F | 50°F | 95°F 2021 | 41°F 2001 | 19% | 0% |
| Sep 9 | 85°F | 49°F | 96°F 2021 | 35°F 2001 | 19% | 0% |
| Sep 10 | 84°F | 49°F | 94°F 2021 | 38°F 1962 | 19% | 0% |
| Sep 11 | 84°F | 49°F | 91°F 1956 | 41°F 1948 | 19% | 0% |
| Sep 12 | 84°F | 48°F | 91°F 2001 | 39°F 1948 | 18% | 0% |
| Sep 13 | 84°F | 48°F | 91°F 2000 | 35°F 1952 | 18% | 0% |
| Sep 14 | 83°F | 47°F | 94°F 2000 | 39°F 1967 | 18% | 0% |
| Sep 15 | 83°F | 47°F | 91°F 2000 | 40°F 1950 | 18% | 0% |
| Sep 16 | 82°F | 47°F | 93°F 2000 | 38°F 2016 | 18% | 0% |
| Sep 17 | 82°F | 46°F | 92°F 2000 | 36°F 1968 | 17% | 0% |
| Sep 18 | 82°F | 46°F | 93°F 1962 | 31°F 2006 | 17% | 0% |
| Sep 19 | 81°F | 46°F | 93°F 1956 | 35°F 1949 | 17% | 0% |
| Sep 20 | 81°F | 45°F | 91°F 2005 | 39°F 1961 | 17% | 0% |
| Sep 21 | 81°F | 45°F | 88°F 1949 | 34°F 1965 | 16% | 0% |
| Sep 22 | 80°F | 44°F | 89°F 1966 | 33°F 2009 | 16% | 0% |
| Sep 23 | 80°F | 44°F | 88°F 1966 | 31°F 2006 | 16% | 0% |
| Sep 24 | 79°F | 43°F | 88°F 1998 | 32°F 2017 | 16% | 0% |
| Sep 25 | 79°F | 43°F | 89°F 2024 | 27°F 2017 | 15% | 0% |
| Sep 26 | 79°F | 43°F | 90°F 2024 | 33°F 2017 | 15% | 0% |
| Sep 27 | 78°F | 42°F | 90°F 2024 | 38°F 2013 | 15% | 0% |
| Sep 28 | 78°F | 42°F | 90°F 2010 | 30°F 2013 | 15% | 0% |
| Sep 29 | 77°F | 41°F | 90°F 2024 | 30°F 1999 | 15% | 0% |
| Sep 30 | 77°F | 41°F | 91°F 2010 | 31°F 1999 | 15% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (MDT).
- September 1
- sunrise 6:45 AM, sunset 7:42 PM
- September 30
- sunrise 7:09 AM, sunset 6:59 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00293340 (Fruitland), public domain. Records: NOAA GHCN-Daily, station USW00023090, 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.