Santa Barbara weather in September: Santa Barbara, California: normal highs, lows, rain and records for September
Santa Barbara in September has a normal high of 74°F and a normal low of 56°F, a daily mean of 65°F, holding near 74°F all month. Measurable precipitation falls on 1 days in a normal September, 0.07 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 24°C and low of 13°C, 2 mm of precipitation in September.
- NOAA stationSanta Barbara Municipal Airport
- Station IDUSW00023190
- Location34.43°N 119.84°W
- Elevation9 ft (3 m)
- From the center8 miles
- Population87,291
- Jan 64° 41°
- Feb 64° 44°
- Mar 66° 46°
- Apr 68° 48°
- May 69° 51°
- Jun 70° 55°
- Jul 73° 58°
- Aug 75° 58°
- Sep 74° 56°
- Oct 73° 51°
- Nov 69° 44°
- Dec 64° 40°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Santa Barbara in September?
The normal high is 74°F and the normal low 56°F, for a daily mean of 65.0°F. September is 1.2°F cooler than August and 2.9°F warmer than October. September is the 3rd warmest month of the year in Santa Barbara and the 10th wettest. Across the month the normal high falls 1°F, from 75°F on September 1 to 74°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 63°F and 67°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 5%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 75°F | 57°F | 3% | 0% |
| September 8 | 75°F | 57°F | 4% | 1% |
| September 15 | 74°F | 56°F | 4% | 1% |
| September 22 | 74°F | 55°F | 4% | 1% |
| September 30 | 74°F | 54°F | 5% | 2% |
Every day of September: normal high, low and chance of precipitation (warmest afternoon September 1, coldest night September 30)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| September 1 | 75°F | 57°F | 3% | 0% | 13 h |
| September 2 | 75°F | 57°F | 3% | 0% | 12 h 50 min |
| September 3 | 75°F | 57°F | 3% | 0% | 12 h 50 min |
| September 4 | 75°F | 57°F | 3% | 0% | 12 h 50 min |
| September 5 | 75°F | 57°F | 3% | 0% | 12 h 50 min |
| September 6 | 75°F | 57°F | 4% | 1% | 12 h 50 min |
| September 7 | 75°F | 57°F | 4% | 1% | 12 h 40 min |
| September 8 | 75°F | 57°F | 4% | 1% | 12 h 40 min |
| September 9 | 75°F | 57°F | 4% | 1% | 12 h 40 min |
| September 10 | 75°F | 56°F | 4% | 1% | 12 h 40 min |
| September 11 | 74°F | 56°F | 4% | 1% | 12 h 30 min |
| September 12 | 74°F | 56°F | 4% | 1% | 12 h 30 min |
| September 13 | 74°F | 56°F | 4% | 1% | 12 h 30 min |
| September 14 | 74°F | 56°F | 4% | 1% | 12 h 30 min |
| September 15 | 74°F | 56°F | 4% | 1% | 12 h 30 min |
| September 16 | 74°F | 56°F | 4% | 1% | 12 h 20 min |
| September 17 | 74°F | 56°F | 4% | 1% | 12 h 20 min |
| September 18 | 74°F | 56°F | 4% | 1% | 12 h 20 min |
| September 19 | 74°F | 55°F | 4% | 1% | 12 h 20 min |
| September 20 | 74°F | 55°F | 4% | 1% | 12 h 20 min |
| September 21 | 74°F | 55°F | 4% | 1% | 12 h 10 min |
| September 22 | 74°F | 55°F | 4% | 1% | 12 h 10 min |
| September 23 | 74°F | 55°F | 4% | 1% | 12 h 10 min |
| September 24 | 74°F | 55°F | 4% | 1% | 12 h 10 min |
| September 25 | 74°F | 55°F | 5% | 1% | 12 h 10 min |
| September 26 | 74°F | 54°F | 5% | 1% | 12 h |
| September 27 | 74°F | 54°F | 5% | 1% | 12 h |
| September 28 | 74°F | 54°F | 5% | 1% | 12 h |
| September 29 | 74°F | 54°F | 5% | 2% | 12 h |
| September 30 | 74°F | 54°F | 5% | 2% | 11 h 50 min |
- Normal high
- 74°FSeptember average
- Normal low
- 56°FSeptember average
- Precipitation
- 0.07 inmonth total
- Days with precipitation
- 10.01 inch or more
- Days at 90°F or more
- 1
- Daylight
- 13 h to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 26
- Days at 80°F or more
- 6
- Sunshine
- 92%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00023190; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Santa Barbara in September?
On a given September day the chance of 0.01 inch or more is 4% on average, highest around September 30 (5%). In all, 0.07 in falls on 1 days of a normal September.
In a normal September in Santa Barbara, 1 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00023190.
How humid and windy is Santa Barbara in September?
At 3 p.m. the normal temperature is 73°F with 54% relative humidity and a dew point of 55°F; at 6 a.m. it is 57°F with 86% humidity. The wind averages 4.7 mph, most often from the west-southwest in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 57°F | 53°F | 86% | 2.2 mph | 56% |
| 9 a.m. | 68°F | 57°F | 68% | 5.1 mph | 57% |
| noon | 73°F | 56°F | 56% | 7.7 mph | 70% |
| 3 p.m. | 73°F | 55°F | 54% | 9.2 mph | 77% |
| 6 p.m. | 65°F | 57°F | 74% | 5.1 mph | 78% |
| 9 p.m. | 62°F | 56°F | 80% | 3.2 mph | 83% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00023190. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for September in Santa Barbara?
The warmest September temperature on this station's record (since 1941) is 104°F, on September 18, 1979; the coldest is 42°F, on September 23, 1941. The wettest September brought 4.13 in (1976).
The September mean against the 1991-2020 normal of 65.0°F: 2021 62.8°F (−2.2), 2022 70.3°F (+5.3), 2023 67.2°F (+2.2), 2024 65.5°F (+0.5), 2025 68.1°F (+3.1), 2026 70.1°F (+5.1). 5 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 62.8°F | −2.2°F | 0.00 in |
| 2022 | 70.3°F | +5.3°F | 0.11 in |
| 2023 | 67.2°F | +2.2°F | 0.00 in |
| 2024 | 65.5°F | +0.5°F | 0.00 in |
| 2025 | 68.1°F | +3.1°F | 0.24 in |
| 2026 | 70.1°F | +5.1°F | 0.00 in |
Source: records: ACIS, station USW00023190; recent months: ACIS, station USW00023190. Records and recent months use complete months only.
How does September in Santa Barbara 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; Santa Barbara's is 74°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Santa Barbara in August75°F by day, 58°F at night
- Santa Barbara in October73°F by day, 51°F at night
- Santa Barbara 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