Moss Beach Weather in September
Average highs run from 72°F on September 1 to 72°F on September 30, and lows from 53°F to 53°F. Normal precipitation for the month is 0.11 in over about 2 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
- 72°F
- Average low
- 53°F
- Precipitation
- 0.11 in
- Record high
- 92°FSep 25, 2019
- Record low
- 35°FSep 30, 2007
- Chance of a freeze
- 0%
- Days of 90°F or more
- 0.6
- Daylight
- 12 h 58 min to 11 h 49 min
- Cloud cover
- 51%
- Humidity
- 83%
- Dew point
- 55°F
- Wind
- 8.3 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 | 72°F | 53°F | 81°F 1947 | 42°F 1984 | 5% |
| Sep 2 | 72°F | 53°F | 83°F 2017 | 40°F 1975 | 5% |
| Sep 3 | 72°F | 53°F | 87°F 2017 | 41°F 2012 | 5% |
| Sep 4 | 72°F | 53°F | 77°F 1971 | 40°F 1988 | 5% |
| Sep 5 | 72°F | 53°F | 83°F 1961 | 43°F 1970 | 5% |
| Sep 6 | 72°F | 53°F | 81°F 2022 | 41°F 2010 | 5% |
| Sep 7 | 73°F | 53°F | 83°F 2020 | 41°F 1982 | 5% |
| Sep 8 | 73°F | 53°F | 90°F 1944 | 43°F 2004 | 5% |
| Sep 9 | 73°F | 53°F | 83°F 2026 | 45°F 2004 | 5% |
| Sep 10 | 73°F | 53°F | 89°F 1979 | 44°F 2002 | 5% |
| Sep 11 | 73°F | 53°F | 90°F 1979 | 43°F 2002 | 5% |
| Sep 12 | 73°F | 53°F | 81°F 1983 | 43°F 1946 | 6% |
| Sep 13 | 73°F | 53°F | 82°F 2000 | 41°F 1988 | 6% |
| Sep 14 | 73°F | 53°F | 80°F 1952 | 42°F 1965 | 6% |
| Sep 15 | 73°F | 53°F | 84°F 1951 | 40°F 2002 | 6% |
| Sep 16 | 72°F | 54°F | 90°F 1958 | 42°F 1993 | 6% |
| Sep 17 | 72°F | 54°F | 82°F 1988 | 39°F 2006 | 6% |
| Sep 18 | 72°F | 54°F | 89°F 1946 | 40°F 1970 | 6% |
| Sep 19 | 72°F | 54°F | 86°F 1939 | 41°F 1993 | 6% |
| Sep 20 | 72°F | 54°F | 90°F 1939 | 42°F 2006 | 6% |
| Sep 21 | 72°F | 53°F | 86°F 1939 | 39°F 2004 | 7% |
| Sep 22 | 72°F | 53°F | 88°F 1939 | 39°F 2004 | 7% |
| Sep 23 | 72°F | 53°F | 91°F 1978 | 40°F 2004 | 7% |
| Sep 24 | 72°F | 53°F | 91°F 1954 | 40°F 2004 | 7% |
| Sep 25 | 72°F | 53°F | 92°F 2019 | 37°F 2005 | 7% |
| Sep 26 | 72°F | 53°F | 90°F 1970 | 40°F 2004 | 7% |
| Sep 27 | 72°F | 53°F | 89°F 1966 | 41°F 2004 | 7% |
| Sep 28 | 72°F | 53°F | 91°F 1958 | 40°F 2013 | 8% |
| Sep 29 | 72°F | 53°F | 85°F 1978 | 39°F 2007 | 8% |
| Sep 30 | 72°F | 53°F | 92°F 2001 | 35°F 2007 | 8% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (PDT).
- September 1
- sunrise 6:41 AM, sunset 7:39 PM
- September 30
- sunrise 7:05 AM, sunset 6:54 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00046599 (Pacifica 4 Sse), public domain. Records: NOAA GHCN-Daily, station USC00043714, 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.