Chula Vista weather in September: Chula Vista, California: normal highs, lows, rain and records for September
Chula Vista in September has a normal high of 77°F and a normal low of 64°F, a daily mean of 71°F, falling from 78°F on the 1st to 76°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 25°C and low of 18°C, 2 mm of precipitation in September.
- NOAA stationChula Vista
- Station IDUSC00041758
- Location32.64°N 117.09°W
- Elevation56 ft (17 m)
- From the center4 miles
- Population278,546
- Jan 68° 47°
- Feb 67° 48°
- Mar 67° 51°
- Apr 68° 54°
- May 69° 58°
- Jun 71° 61°
- Jul 75° 65°
- Aug 77° 66°
- Sep 77° 64°
- Oct 75° 59°
- Nov 71° 51°
- Dec 67° 46°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Chula Vista in September?
The normal high is 77°F and the normal low 64°F, for a daily mean of 70.6°F. September is 0.7°F cooler than August and 3.9°F warmer than October. September is the 2nd warmest month of the year in Chula Vista and the 9th wettest. Across the month the normal high falls 2°F, from 78°F on September 1 to 76°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 68°F and 73°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 3%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 78°F | 65°F | 1% | 1% |
| September 8 | 78°F | 65°F | 2% | 1% |
| September 15 | 77°F | 64°F | 2% | 1% |
| September 22 | 77°F | 63°F | 2% | 1% |
| September 30 | 76°F | 62°F | 3% | 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 | 78°F | 65°F | 1% | 1% | 12 h 50 min |
| September 2 | 78°F | 65°F | 1% | 1% | 12 h 50 min |
| September 3 | 78°F | 65°F | 1% | 1% | 12 h 50 min |
| September 4 | 78°F | 65°F | 1% | 1% | 12 h 50 min |
| September 5 | 78°F | 65°F | 2% | 1% | 12 h 40 min |
| September 6 | 78°F | 65°F | 2% | 1% | 12 h 40 min |
| September 7 | 78°F | 65°F | 2% | 1% | 12 h 40 min |
| September 8 | 78°F | 65°F | 2% | 1% | 12 h 40 min |
| September 9 | 78°F | 65°F | 2% | 1% | 12 h 40 min |
| September 10 | 78°F | 65°F | 2% | 1% | 12 h 30 min |
| September 11 | 78°F | 65°F | 2% | 1% | 12 h 30 min |
| September 12 | 78°F | 65°F | 2% | 1% | 12 h 30 min |
| September 13 | 77°F | 65°F | 2% | 1% | 12 h 30 min |
| September 14 | 77°F | 64°F | 2% | 1% | 12 h 30 min |
| September 15 | 77°F | 64°F | 2% | 1% | 12 h 30 min |
| September 16 | 77°F | 64°F | 2% | 1% | 12 h 20 min |
| September 17 | 77°F | 64°F | 2% | 1% | 12 h 20 min |
| September 18 | 77°F | 64°F | 2% | 1% | 12 h 20 min |
| September 19 | 77°F | 64°F | 2% | 1% | 12 h 20 min |
| September 20 | 77°F | 64°F | 2% | 1% | 12 h 20 min |
| September 21 | 77°F | 64°F | 2% | 1% | 12 h 10 min |
| September 22 | 77°F | 63°F | 2% | 1% | 12 h 10 min |
| September 23 | 77°F | 63°F | 2% | 1% | 12 h 10 min |
| September 24 | 77°F | 63°F | 2% | 1% | 12 h 10 min |
| September 25 | 77°F | 63°F | 2% | 1% | 12 h 10 min |
| September 26 | 76°F | 63°F | 2% | 1% | 12 h |
| September 27 | 76°F | 63°F | 2% | 1% | 12 h |
| September 28 | 76°F | 62°F | 2% | 1% | 12 h |
| September 29 | 76°F | 62°F | 2% | 1% | 12 h |
| September 30 | 76°F | 62°F | 3% | 1% | 12 h |
- Normal high
- 77°FSeptember average
- Normal low
- 64°FSeptember average
- Precipitation
- 0.09 inmonth total
- Days with precipitation
- 10.01 inch or more
- Days at 90°F or more
- 2
- Daylight
- 12 h 50 min to 12 hSeptember 1 to September 30
- Days at 70°F or more
- 29
- Days at 80°F or more
- 11
- Sunshine
- 82%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00041758; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Chula Vista in September?
On a given September day the chance of 0.01 inch or more is 2% on average, highest around September 30 (3%). In all, 0.09 in falls on 1 days of a normal September.
In a normal September in Chula Vista, 2 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00041758.
What are the records for September in Chula Vista?
The warmest September temperature on this station's record (since 1918) is 105°F, on September 21, 1939; the coldest is 47°F, on September 30, 1919. The wettest September brought 2.93 in (1939).
The September mean against the 1991-2020 normal of 70.6°F: 2021 70.5°F (−0.1), 2022 73.8°F (+3.2), 2023 71.1°F (+0.5), 2024 72.0°F (+1.4), 2025 75.5°F (+4.9). 4 of 5 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 70.5°F | −0.1°F | 0.48 in |
| 2022 | 73.8°F | +3.2°F | 0.23 in |
| 2023 | 71.1°F | +0.5°F | 0.01 in |
| 2024 | 72.0°F | +1.4°F | 0.00 in |
| 2025 | 75.5°F | +4.9°F | 0.24 in |
Source: records: ACIS, station USC00041758; recent months: ACIS, station USC00041758. Records and recent months use complete months only.
How does September in Chula Vista 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; Chula Vista's is 77°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Chula Vista in August77°F by day, 66°F at night
- Chula Vista in October75°F by day, 59°F at night
- Chula Vista 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