Morro Bay weather in September: Morro Bay, California: normal highs, lows, rain and records for September
Morro Bay in September has a normal high of 72°F and a normal low of 56°F, a daily mean of 64°F, rising from 71°F on the 1st to 72°F by the 30th. Measurable precipitation falls on 1 days in a normal September, 0.09 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 22°C and low of 13°C, 2 mm of precipitation in September.
- NOAA stationMorro Bay Fire Dept
- Station IDUSC00045866
- Location35.37°N 120.84°W
- Elevation118 ft (36 m)
- Population10,591
- Jan 65° 46°
- Feb 65° 48°
- Mar 66° 49°
- Apr 67° 49°
- May 67° 52°
- Jun 66° 54°
- Jul 67° 57°
- Aug 70° 57°
- Sep 72° 56°
- Oct 73° 54°
- Nov 69° 50°
- Dec 65° 46°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Morro Bay in September?
The normal high is 72°F and the normal low 56°F, for a daily mean of 63.7°F. September is 0.5°F warmer than August and 0.2°F warmer than October. September is the warmest month of the year in Morro Bay and the 10th wettest. Across the month the normal high rises 1°F, from 71°F on September 1 to 72°F on September 30. From one year to the next September's mean temperature typically moves about 2.2°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 62°F and 66°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 4%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 71°F | 56°F | 2% | 1% |
| September 8 | 71°F | 56°F | 2% | 1% |
| September 15 | 72°F | 56°F | 3% | 1% |
| September 22 | 72°F | 56°F | 3% | 2% |
| September 30 | 72°F | 56°F | 4% | 2% |
Every day of September: normal high, low and chance of precipitation (warmest afternoon September 30, coldest night September 30)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| September 1 | 71°F | 56°F | 2% | 1% | 13 h |
| September 2 | 71°F | 56°F | 2% | 1% | 13 h |
| September 3 | 71°F | 56°F | 2% | 1% | 12 h 50 min |
| September 4 | 71°F | 56°F | 2% | 1% | 12 h 50 min |
| September 5 | 71°F | 56°F | 2% | 1% | 12 h 50 min |
| September 6 | 71°F | 56°F | 2% | 1% | 12 h 50 min |
| September 7 | 71°F | 56°F | 2% | 1% | 12 h 40 min |
| September 8 | 71°F | 56°F | 2% | 1% | 12 h 40 min |
| September 9 | 71°F | 56°F | 2% | 1% | 12 h 40 min |
| September 10 | 71°F | 56°F | 2% | 1% | 12 h 40 min |
| September 11 | 71°F | 56°F | 2% | 1% | 12 h 40 min |
| September 12 | 71°F | 56°F | 2% | 1% | 12 h 30 min |
| September 13 | 71°F | 56°F | 2% | 1% | 12 h 30 min |
| September 14 | 71°F | 56°F | 3% | 1% | 12 h 30 min |
| September 15 | 72°F | 56°F | 3% | 1% | 12 h 30 min |
| September 16 | 72°F | 56°F | 3% | 1% | 12 h 30 min |
| September 17 | 72°F | 56°F | 3% | 1% | 12 h 20 min |
| September 18 | 72°F | 56°F | 3% | 1% | 12 h 20 min |
| September 19 | 72°F | 56°F | 3% | 1% | 12 h 20 min |
| September 20 | 72°F | 56°F | 3% | 1% | 12 h 20 min |
| September 21 | 72°F | 56°F | 3% | 1% | 12 h 10 min |
| September 22 | 72°F | 56°F | 3% | 2% | 12 h 10 min |
| September 23 | 72°F | 56°F | 4% | 2% | 12 h 10 min |
| September 24 | 72°F | 56°F | 4% | 2% | 12 h 10 min |
| September 25 | 72°F | 56°F | 4% | 2% | 12 h 10 min |
| September 26 | 72°F | 56°F | 4% | 2% | 12 h |
| September 27 | 72°F | 56°F | 4% | 2% | 12 h |
| September 28 | 72°F | 56°F | 4% | 2% | 12 h |
| September 29 | 72°F | 56°F | 4% | 2% | 12 h |
| September 30 | 72°F | 56°F | 4% | 2% | 11 h 50 min |
- Normal high
- 72°FSeptember average
- Normal low
- 56°FSeptember average
- Precipitation
- 0.09 inmonth total
- Days with precipitation
- 10.01 inch or more
- Daylight
- 13 h to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 13
- Days at 80°F or more
- 2
- Sunshine
- 95%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00045866; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Morro Bay in September?
On a given September day the chance of 0.01 inch or more is 3% on average, highest around September 30 (4%). In all, 0.09 in falls on 1 days of a normal September.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00045866.
What are the records for September in Morro Bay?
The warmest September temperature on this station's record (since 1959) is 101°F, on September 29, 1966; the coldest is 40°F, on September 9, 2012. The wettest September brought 2.72 in (1976).
Source: records: ACIS, station USC00045866. Records and recent months use complete months only.
How does September in Morro Bay compare across California?
Across the 219 places PlainClimate covers in California, September normal highs run from 64°F in Eureka to 104°F in Brawley; Morro Bay's is 72°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Morro Bay in August70°F by day, 57°F at night
- Morro Bay in October73°F by day, 54°F at night
- Morro Bay through the yearEvery month, frost dates, records and recent years
- California in SeptemberThe statewide normal and the warmest and coolest places
- Brawley: California's warmest Septembernormal high 104°F