Portales Weather in September
Average highs run from 89°F on September 1 to 81°F on September 30, and lows from 62°F to 52°F. Normal precipitation for the month is 1.92 in over about 6 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
- 85°F
- Average low
- 57°F
- Precipitation
- 1.92 in
- Record high
- 105°FSep 2, 1937
- Record low
- 31°FSep 30, 1945
- Chance of a freeze
- 1%
- Days of 90°F or more
- 8.5
- Daylight
- 12 h 52 min to 11 h 52 min
- Cloud cover
- 38%
- Humidity
- 51%
- Dew point
- 49°F
- Wind
- 9.4 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 | 89°F | 62°F | 103°F 1937 | 46°F 1956 | 23% | 0% |
| Sep 2 | 89°F | 62°F | 105°F 1937 | 48°F 1934 | 23% | 0% |
| Sep 3 | 88°F | 62°F | 101°F 1943 | 41°F 1961 | 23% | 0% |
| Sep 4 | 88°F | 61°F | 101°F 1945 | 40°F 1961 | 23% | 0% |
| Sep 5 | 88°F | 61°F | 101°F 1945 | 45°F 1984 | 23% | 0% |
| Sep 6 | 88°F | 61°F | 101°F 1948 | 47°F 1984 | 22% | 0% |
| Sep 7 | 87°F | 61°F | 101°F 1917 | 39°F 1918 | 22% | 0% |
| Sep 8 | 87°F | 60°F | 100°F 1940 | 42°F 1918 | 22% | 0% |
| Sep 9 | 87°F | 60°F | 97°F 1936 | 45°F 1941 | 22% | 0% |
| Sep 10 | 87°F | 60°F | 97°F 1934 | 42°F 1929 | 22% | 0% |
| Sep 11 | 86°F | 59°F | 98°F 1984 | 43°F 1918 | 22% | 0% |
| Sep 12 | 86°F | 59°F | 103°F 1943 | 41°F 1913 | 21% | 0% |
| Sep 13 | 86°F | 59°F | 95°F 1911 | 39°F 1959 | 21% | 0% |
| Sep 14 | 86°F | 58°F | 97°F 1917 | 39°F 1959 | 21% | 0% |
| Sep 15 | 85°F | 58°F | 97°F 1931 | 41°F 1912 | 21% | 0% |
| Sep 16 | 85°F | 58°F | 98°F 1956 | 36°F 1951 | 21% | 0% |
| Sep 17 | 85°F | 57°F | 98°F 1930 | 36°F 1971 | 21% | 0% |
| Sep 18 | 85°F | 57°F | 100°F 1930 | 36°F 1918 | 20% | 0% |
| Sep 19 | 84°F | 56°F | 97°F 1997 | 36°F 1971 | 20% | 0% |
| Sep 20 | 84°F | 56°F | 96°F 1926 | 38°F 1991 | 20% | 0% |
| Sep 21 | 84°F | 56°F | 97°F 1926 | 33°F 1983 | 20% | 0% |
| Sep 22 | 84°F | 55°F | 96°F 1926 | 36°F 1951 | 20% | 0% |
| Sep 23 | 83°F | 55°F | 94°F 1929 | 37°F 1970 | 20% | 0% |
| Sep 24 | 83°F | 54°F | 96°F 1939 | 35°F 1926 | 19% | 0% |
| Sep 25 | 83°F | 54°F | 94°F 1911 | 33°F 2000 | 19% | 0% |
| Sep 26 | 83°F | 54°F | 95°F 2005 | 34°F 1970 | 19% | 0% |
| Sep 27 | 82°F | 53°F | 98°F 1953 | 33°F 1936 | 19% | 0% |
| Sep 28 | 82°F | 53°F | 97°F 1911 | 33°F 1945 | 19% | 0% |
| Sep 29 | 82°F | 52°F | 95°F 1911 | 32°F 1945 | 18% | 0% |
| Sep 30 | 81°F | 52°F | 95°F 1994 | 31°F 1945 | 18% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (MDT).
- September 1
- sunrise 6:27 AM, sunset 7:19 PM
- September 30
- sunrise 6:47 AM, sunset 6:39 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00297008 (Portales), public domain. Records: NOAA GHCN-Daily, station USC00291939, 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.