Chino weather in September: Chino, California: normal highs, lows, rain and records for September
Chino in September has a normal high of 93°F and a normal low of 60°F, a daily mean of 77°F, falling from 96°F on the 1st to 88°F by the 30th. Measurable precipitation falls on 1 days in a normal September, 0.06 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 34°C and low of 16°C, 2 mm of precipitation in September.
- NOAA stationChino Airport
- Station IDUSW00003179
- Location33.98°N 117.64°W
- Elevation650 ft (198 m)
- Population94,010
- Jan 70° 42°
- Feb 70° 43°
- Mar 73° 46°
- Apr 77° 49°
- May 81° 54°
- Jun 88° 59°
- Jul 94° 63°
- Aug 96° 63°
- Sep 93° 60°
- Oct 85° 53°
- Nov 76° 45°
- Dec 69° 40°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Chino in September?
The normal high is 93°F and the normal low 60°F, for a daily mean of 76.5°F. September is 3.3°F cooler than August and 7.6°F warmer than October. September is the 3rd warmest month of the year in Chino and the 10th wettest. Across the month the normal high falls 8°F, from 96°F on September 1 to 88°F on September 30. From one year to the next September's mean temperature typically moves about 1.9°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 75°F and 78°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 | 96°F | 63°F | 1% | 0% |
| September 8 | 95°F | 62°F | 2% | 1% |
| September 15 | 93°F | 61°F | 3% | 1% |
| September 22 | 91°F | 59°F | 4% | 1% |
| September 30 | 88°F | 58°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 | 96°F | 63°F | 1% | 0% | 12 h 50 min |
| September 2 | 96°F | 62°F | 2% | 0% | 12 h 50 min |
| September 3 | 96°F | 62°F | 2% | 0% | 12 h 50 min |
| September 4 | 96°F | 62°F | 2% | 0% | 12 h 50 min |
| September 5 | 96°F | 62°F | 2% | 0% | 12 h 50 min |
| September 6 | 96°F | 62°F | 2% | 1% | 12 h 40 min |
| September 7 | 95°F | 62°F | 2% | 1% | 12 h 40 min |
| September 8 | 95°F | 62°F | 2% | 1% | 12 h 40 min |
| September 9 | 95°F | 62°F | 2% | 1% | 12 h 40 min |
| September 10 | 95°F | 62°F | 2% | 1% | 12 h 40 min |
| September 11 | 94°F | 61°F | 2% | 1% | 12 h 30 min |
| September 12 | 94°F | 61°F | 2% | 1% | 12 h 30 min |
| September 13 | 94°F | 61°F | 2% | 1% | 12 h 30 min |
| September 14 | 93°F | 61°F | 3% | 1% | 12 h 30 min |
| September 15 | 93°F | 61°F | 3% | 1% | 12 h 30 min |
| September 16 | 93°F | 61°F | 3% | 1% | 12 h 20 min |
| September 17 | 93°F | 60°F | 3% | 1% | 12 h 20 min |
| September 18 | 92°F | 60°F | 3% | 1% | 12 h 20 min |
| September 19 | 92°F | 60°F | 3% | 1% | 12 h 20 min |
| September 20 | 91°F | 60°F | 3% | 1% | 12 h 20 min |
| September 21 | 91°F | 60°F | 4% | 1% | 12 h 10 min |
| September 22 | 91°F | 59°F | 4% | 1% | 12 h 10 min |
| September 23 | 90°F | 59°F | 4% | 1% | 12 h 10 min |
| September 24 | 90°F | 59°F | 4% | 1% | 12 h 10 min |
| September 25 | 90°F | 59°F | 4% | 1% | 12 h 10 min |
| September 26 | 89°F | 59°F | 4% | 2% | 12 h |
| September 27 | 89°F | 58°F | 5% | 2% | 12 h |
| September 28 | 89°F | 58°F | 5% | 2% | 12 h |
| September 29 | 89°F | 58°F | 5% | 2% | 12 h |
| September 30 | 88°F | 58°F | 5% | 2% | 11 h 50 min |
- Normal high
- 93°FSeptember average
- Normal low
- 60°FSeptember average
- Precipitation
- 0.06 inmonth total
- Days with precipitation
- 10.01 inch or more
- Days at 90°F or more
- 19
- 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
- 27
- Sunshine
- 91%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00003179; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Chino in September?
On a given September day the chance of 0.01 inch or more is 3% on average, highest around September 30 (5%). In all, 0.06 in falls on 1 days of a normal September.
In a normal September in Chino, 19 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00003179.
What are the records for September in Chino?
The warmest September temperature on this station's record (since 1998) is 121°F, on September 6, 2020; the coldest is 47°F, on September 20, 1999. The wettest September brought 0.78 in (2015).
The September mean against the 1991-2020 normal of 76.5°F: 2021 77.5°F (+1.0), 2022 81.6°F (+5.1), 2023 73.1°F (−3.4), 2024 75.7°F (−0.8), 2025 76.9°F (+0.4), 2026 77.4°F (+0.9). 4 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 77.5°F | +1.0°F | 0.00 in |
| 2022 | 81.6°F | +5.1°F | 0.26 in |
| 2023 | 73.1°F | −3.4°F | 0.04 in |
| 2024 | 75.7°F | −0.8°F | 0.00 in |
| 2025 | 76.9°F | +0.4°F | 0.02 in |
| 2026 | 77.4°F | +0.9°F | 0.58 in |
Source: records: ACIS, station USW00003179; recent months: ACIS, station USW00003179. Records and recent months use complete months only.
How does September in Chino 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; Chino's is 93°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.