Tustin weather in September: Tustin, California: normal highs, lows, rain and records for September
Tustin in September has a normal high of 87°F and a normal low of 61°F, a daily mean of 74°F, holding near 87°F all month. Measurable precipitation falls on 0 days in a normal September, 0.18 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 30°C and low of 16°C, 5 mm of precipitation in September.
- NOAA stationTustin Irvine Ranch
- Station IDUSC00049087
- Location33.70°N 117.75°W
- Elevation235 ft (72 m)
- From the center4 miles
- Population78,863
- Jan 68° 43°
- Feb 69° 45°
- Mar 72° 48°
- Apr 74° 50°
- May 77° 55°
- Jun 80° 58°
- Jul 85° 61°
- Aug 87° 63°
- Sep 87° 61°
- Oct 84° 55°
- Nov 76° 47°
- Dec 70° 43°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Tustin in September?
The normal high is 87°F and the normal low 61°F, for a daily mean of 73.9°F. September is 1.3°F cooler than August and 4.7°F warmer than October. September is the 2nd warmest month of the year in Tustin and the 9th wettest. Across the month the normal high falls 1°F, from 87°F on September 1 to 86°F on September 30. From one year to the next September's mean temperature typically moves about 2.3°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 72°F and 76°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 2%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 87°F | 63°F | 1% | 1% |
| September 8 | 87°F | 62°F | 1% | 1% |
| September 15 | 87°F | 61°F | 1% | 1% |
| September 22 | 87°F | 60°F | 2% | 1% |
| September 30 | 86°F | 59°F | 2% | 1% |
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 | 87°F | 63°F | 1% | 1% | 12 h 50 min |
| September 2 | 87°F | 63°F | 1% | 1% | 12 h 50 min |
| September 3 | 87°F | 63°F | 1% | 1% | 12 h 50 min |
| September 4 | 87°F | 63°F | 1% | 1% | 12 h 50 min |
| September 5 | 87°F | 63°F | 1% | 1% | 12 h 50 min |
| September 6 | 87°F | 63°F | 1% | 1% | 12 h 40 min |
| September 7 | 87°F | 62°F | 1% | 1% | 12 h 40 min |
| September 8 | 87°F | 62°F | 1% | 1% | 12 h 40 min |
| September 9 | 87°F | 62°F | 1% | 1% | 12 h 40 min |
| September 10 | 87°F | 62°F | 1% | 1% | 12 h 40 min |
| September 11 | 87°F | 62°F | 1% | 1% | 12 h 30 min |
| September 12 | 87°F | 62°F | 1% | 1% | 12 h 30 min |
| September 13 | 87°F | 62°F | 1% | 1% | 12 h 30 min |
| September 14 | 87°F | 62°F | 1% | 1% | 12 h 30 min |
| September 15 | 87°F | 61°F | 1% | 1% | 12 h 30 min |
| September 16 | 87°F | 61°F | 1% | 1% | 12 h 20 min |
| September 17 | 87°F | 61°F | 1% | 1% | 12 h 20 min |
| September 18 | 87°F | 61°F | 1% | 1% | 12 h 20 min |
| September 19 | 87°F | 61°F | 2% | 1% | 12 h 20 min |
| September 20 | 87°F | 61°F | 2% | 1% | 12 h 20 min |
| September 21 | 87°F | 60°F | 2% | 1% | 12 h 10 min |
| September 22 | 87°F | 60°F | 2% | 1% | 12 h 10 min |
| September 23 | 87°F | 60°F | 2% | 1% | 12 h 10 min |
| September 24 | 86°F | 60°F | 2% | 1% | 12 h 10 min |
| September 25 | 86°F | 60°F | 2% | 1% | 12 h 10 min |
| September 26 | 86°F | 59°F | 2% | 1% | 12 h |
| September 27 | 86°F | 59°F | 2% | 1% | 12 h |
| September 28 | 86°F | 59°F | 2% | 1% | 12 h |
| September 29 | 86°F | 59°F | 2% | 1% | 12 h |
| September 30 | 86°F | 59°F | 2% | 1% | 11 h 50 min |
- Normal high
- 87°FSeptember average
- Normal low
- 61°FSeptember average
- Precipitation
- 0.18 inmonth total
- Days with precipitation
- fewer than 10.01 inch or more
- Days at 90°F or more
- 9
- Daylight
- 12 h 50 min to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 30
- Days at 80°F or more
- 25
- Sunshine
- 91%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00049087; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Tustin in September?
On a given September day the chance of 0.01 inch or more is 1% on average, highest around September 30 (2%). In all, 0.18 in falls on 0 days of a normal September.
In a normal September in Tustin, 9 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00049087.
What are the records for September in Tustin?
The warmest September temperature on this station's record (since 1915) is 111°F, on September 26, 1963; the coldest is 39°F, on September 26, 1948. The wettest September brought 3.51 in (1939).
Source: records: ACIS, station USC00049087. Records and recent months use complete months only.
How does September in Tustin 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; Tustin's is 87°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.