Nipomo Weather in September
Average highs run from 78°F on September 1 to 77°F on September 30, and lows from 53°F to 50°F. Normal precipitation for the month is 0.07 in over about 1 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
- 78°F
- Average low
- 52°F
- Precipitation
- 0.07 in
- Record high
- 106°FSep 2, 2017
- Record low
- 36°FSep 26, 1948
- Chance of a freeze
- 0%
- Days of 90°F or more
- 5.4
- Daylight
- 12 h 53 min to 11 h 51 min
- Cloud cover
- 22%
- Humidity
- 65%
- Dew point
- 52°F
- Wind
- 7.6 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation.
| Date | Normal high | Normal low | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| Sep 1 | 78°F | 53°F | 102°F 1955 | 47°F 1964 | 2% |
| Sep 2 | 78°F | 53°F | 106°F 2017 | 48°F 1973 | 2% |
| Sep 3 | 78°F | 53°F | 101°F 2017 | 48°F 1971 | 2% |
| Sep 4 | 78°F | 53°F | 98°F 1961 | 47°F 1970 | 2% |
| Sep 5 | 78°F | 53°F | 98°F 2004 | 42°F 1970 | 2% |
| Sep 6 | 78°F | 53°F | 103°F 2020 | 46°F 2016 | 2% |
| Sep 7 | 78°F | 53°F | 97°F 1984 | 46°F 1954 | 2% |
| Sep 8 | 78°F | 53°F | 96°F 1984 | 42°F 1964 | 3% |
| Sep 9 | 78°F | 52°F | 103°F 2026 | 43°F 1964 | 3% |
| Sep 10 | 78°F | 52°F | 97°F 1983 | 45°F 2010 | 3% |
| Sep 11 | 78°F | 52°F | 101°F 1983 | 43°F 1952 | 3% |
| Sep 12 | 78°F | 52°F | 93°F 1948 | 41°F 1972 | 3% |
| Sep 13 | 78°F | 52°F | 98°F 1971 | 44°F 1952 | 3% |
| Sep 14 | 78°F | 52°F | 95°F 2019 | 42°F 1970 | 3% |
| Sep 15 | 78°F | 52°F | 94°F 1958 | 41°F 1970 | 3% |
| Sep 16 | 78°F | 52°F | 90°F 1966 | 40°F 1970 | 3% |
| Sep 17 | 78°F | 52°F | 98°F 1984 | 43°F 1970 | 3% |
| Sep 18 | 78°F | 51°F | 92°F 1984 | 43°F 1978 | 3% |
| Sep 19 | 78°F | 51°F | 97°F 2015 | 42°F 1978 | 3% |
| Sep 20 | 78°F | 51°F | 92°F 2015 | 41°F 1954 | 3% |
| Sep 21 | 78°F | 51°F | 92°F 2015 | 42°F 1968 | 4% |
| Sep 22 | 78°F | 51°F | 91°F 1949 | 42°F 1948 | 4% |
| Sep 23 | 78°F | 51°F | 98°F 1978 | 44°F 1948 | 4% |
| Sep 24 | 77°F | 51°F | 103°F 1978 | 42°F 1948 | 4% |
| Sep 25 | 77°F | 51°F | 99°F 1968 | 38°F 1948 | 4% |
| Sep 26 | 77°F | 51°F | 101°F 2016 | 36°F 1948 | 4% |
| Sep 27 | 77°F | 51°F | 105°F 2010 | 43°F 2013 | 5% |
| Sep 28 | 77°F | 51°F | 98°F 1966 | 38°F 1948 | 5% |
| Sep 29 | 77°F | 50°F | 95°F 2005 | 39°F 1948 | 5% |
| Sep 30 | 77°F | 50°F | 96°F 1980 | 38°F 1950 | 5% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (PDT).
- September 1
- sunrise 6:35 AM, sunset 7:28 PM
- September 30
- sunrise 6:56 AM, sunset 6:47 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00049111 (Twitchell Dam), public domain. Records: NOAA GHCN-Daily, station USW00023273, 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.