Oakland weather in September: Oakland, California: normal highs, lows, rain and records for September
Oakland 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 2 days in a normal September, 0.10 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 23°C and low of 13°C, 3 mm of precipitation in September.
- NOAA stationOakland Metro International Airport
- Station IDUSW00023230
- Location37.72°N 122.22°W
- Elevation6 ft (2 m)
- From the center3 miles
- Population443,554
- Jan 58° 42°
- Feb 60° 45°
- Mar 63° 47°
- Apr 66° 49°
- May 68° 52°
- Jun 71° 54°
- Jul 72° 56°
- Aug 72° 57°
- Sep 74° 56°
- Oct 72° 51°
- Nov 64° 46°
- Dec 58° 42°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Oakland in September?
The normal high is 74°F and the normal low 56°F, for a daily mean of 64.8°F. September is 0.2°F warmer than August and 3.4°F warmer than October. September is the warmest month of the year in Oakland and the 10th wettest. From one year to the next September's mean temperature typically moves about 2.4°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 62°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 9%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 74°F | 57°F | 3% | 1% |
| September 8 | 74°F | 56°F | 4% | 1% |
| September 15 | 74°F | 56°F | 5% | 1% |
| September 22 | 74°F | 55°F | 7% | 2% |
| September 30 | 74°F | 54°F | 9% | 3% |
Every day of September: normal high, low and chance of precipitation (warmest afternoon September 10, coldest night September 30)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| September 1 | 74°F | 57°F | 3% | 1% | 13 h |
| September 2 | 74°F | 57°F | 3% | 1% | 13 h |
| September 3 | 74°F | 57°F | 3% | 1% | 13 h |
| September 4 | 74°F | 57°F | 3% | 1% | 13 h |
| September 5 | 74°F | 56°F | 3% | 1% | 12 h 50 min |
| September 6 | 74°F | 56°F | 3% | 1% | 12 h 50 min |
| September 7 | 74°F | 56°F | 3% | 1% | 12 h 50 min |
| September 8 | 74°F | 56°F | 4% | 1% | 12 h 50 min |
| September 9 | 74°F | 56°F | 4% | 1% | 12 h 40 min |
| September 10 | 74°F | 56°F | 4% | 1% | 12 h 40 min |
| September 11 | 74°F | 56°F | 4% | 1% | 12 h 40 min |
| September 12 | 74°F | 56°F | 4% | 1% | 12 h 40 min |
| September 13 | 74°F | 56°F | 4% | 1% | 12 h 30 min |
| September 14 | 74°F | 56°F | 5% | 1% | 12 h 30 min |
| September 15 | 74°F | 56°F | 5% | 1% | 12 h 30 min |
| September 16 | 74°F | 56°F | 5% | 2% | 12 h 30 min |
| September 17 | 74°F | 56°F | 5% | 2% | 12 h 20 min |
| September 18 | 74°F | 55°F | 6% | 2% | 12 h 20 min |
| September 19 | 74°F | 55°F | 6% | 2% | 12 h 20 min |
| September 20 | 74°F | 55°F | 6% | 2% | 12 h 20 min |
| September 21 | 74°F | 55°F | 7% | 2% | 12 h 10 min |
| September 22 | 74°F | 55°F | 7% | 2% | 12 h 10 min |
| September 23 | 74°F | 55°F | 7% | 2% | 12 h 10 min |
| September 24 | 74°F | 55°F | 7% | 2% | 12 h 10 min |
| September 25 | 74°F | 55°F | 8% | 3% | 12 h 10 min |
| September 26 | 74°F | 55°F | 8% | 3% | 12 h |
| September 27 | 74°F | 54°F | 8% | 3% | 12 h |
| September 28 | 74°F | 54°F | 9% | 3% | 12 h |
| September 29 | 74°F | 54°F | 9% | 3% | 12 h |
| September 30 | 74°F | 54°F | 9% | 3% | 11 h 50 min |
- Normal high
- 74°FSeptember average
- Normal low
- 56°FSeptember average
- Precipitation
- 0.10 inmonth total
- Days with precipitation
- 20.01 inch or more
- Days at 90°F or more
- 2
- Daylight
- 13 h to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 21
- Days at 80°F or more
- 7
- Sunshine
- 82%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00023230; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Oakland in September?
On a given September day the chance of 0.01 inch or more is 5% on average, highest around September 30 (9%). In all, 0.10 in falls on 2 days of a normal September.
In a normal September in Oakland, 2 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00023230.
How humid and windy is Oakland in September?
At 3 p.m. the normal temperature is 72°F with 53% relative humidity and a dew point of 53°F; at 6 a.m. it is 57°F with 83% humidity. The wind averages 7.5 mph, most often from the west-northwest in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 57°F | 52°F | 83% | 4.6 mph | – |
| 9 a.m. | 64°F | 54°F | 70% | 5.7 mph | 52% |
| noon | 69°F | 53°F | 55% | 8.8 mph | 67% |
| 3 p.m. | 72°F | 53°F | 53% | 13.0 mph | 68% |
| 6 p.m. | 65°F | 53°F | 65% | 10.8 mph | 65% |
| 9 p.m. | 61°F | 54°F | 76% | 7.0 mph | 69% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00023230. 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 Oakland?
The warmest September temperature on this station's record (since 1948) is 104°F, on September 6, 2020; the coldest is 41°F, on September 30, 1950. The wettest September brought 3.27 in (1959).
The September mean against the 1991-2020 normal of 64.8°F: 2021 65.6°F (+0.8), 2022 68.1°F (+3.3), 2023 64.5°F (−0.3), 2024 66.5°F (+1.7), 2025 67.2°F (+2.4), 2026 65.3°F (+0.5). 5 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 65.6°F | +0.8°F | 0.00 in |
| 2022 | 68.1°F | +3.3°F | 0.29 in |
| 2023 | 64.5°F | −0.3°F | 0.00 in |
| 2024 | 66.5°F | +1.7°F | 0.00 in |
| 2025 | 67.2°F | +2.4°F | 0.03 in |
| 2026 | 65.3°F | +0.5°F | 0.08 in |
Source: records: ACIS, station USW00023230; recent months: ACIS, station USW00023230. Records and recent months use complete months only.
How does September in Oakland 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; Oakland's is 74°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.