Chico weather in September: Chico, California: normal highs, lows, rain and records for September
Chico in September has a normal high of 91°F and a normal low of 55°F, a daily mean of 73°F, falling from 93°F on the 1st to 87°F by the 30th. The month brings 0.25 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 33°C and low of 13°C, 6 mm of precipitation in September.
- NOAA stationChico University Farm
- Station IDUSC00041715
- Location39.69°N 121.82°W
- Elevation185 ft (56 m)
- From the center5 miles
- Population102,911
- Jan 56° 36°
- Feb 62° 38°
- Mar 67° 42°
- Apr 73° 45°
- May 81° 52°
- Jun 89° 57°
- Jul 95° 61°
- Aug 94° 59°
- Sep 91° 55°
- Oct 80° 47°
- Nov 65° 40°
- Dec 57° 36°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Chico in September?
The normal high is 91°F and the normal low 55°F, for a daily mean of 72.9°F. September is 3.8°F cooler than August and 9.4°F warmer than October. September is the 4th warmest month of the year in Chico and the 10th wettest. Across the month the normal high falls 6°F, from 93°F on September 1 to 87°F on September 30. From one year to the next September's mean temperature typically moves about 1.7°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 71°F and 75°F.
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 93°F | 57°F | – | – |
| September 8 | 92°F | 56°F | – | – |
| September 15 | 91°F | 55°F | – | – |
| September 22 | 90°F | 54°F | – | – |
| September 30 | 87°F | 52°F | – | – |
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 | 93°F | 57°F | – | – | 13 h 10 min |
| September 2 | 93°F | 57°F | – | – | 13 h |
| September 3 | 93°F | 57°F | – | – | 13 h |
| September 4 | 93°F | 57°F | – | – | 13 h |
| September 5 | 93°F | 56°F | – | – | 13 h |
| September 6 | 93°F | 56°F | – | – | 12 h 50 min |
| September 7 | 93°F | 56°F | – | – | 12 h 50 min |
| September 8 | 92°F | 56°F | – | – | 12 h 50 min |
| September 9 | 92°F | 56°F | – | – | 12 h 50 min |
| September 10 | 92°F | 56°F | – | – | 12 h 40 min |
| September 11 | 92°F | 56°F | – | – | 12 h 40 min |
| September 12 | 92°F | 56°F | – | – | 12 h 40 min |
| September 13 | 92°F | 55°F | – | – | 12 h 40 min |
| September 14 | 92°F | 55°F | – | – | 12 h 30 min |
| September 15 | 91°F | 55°F | – | – | 12 h 30 min |
| September 16 | 91°F | 55°F | – | – | 12 h 30 min |
| September 17 | 91°F | 55°F | – | – | 12 h 30 min |
| September 18 | 91°F | 55°F | – | – | 12 h 20 min |
| September 19 | 91°F | 55°F | – | – | 12 h 20 min |
| September 20 | 90°F | 54°F | – | – | 12 h 20 min |
| September 21 | 90°F | 54°F | – | – | 12 h 20 min |
| September 22 | 90°F | 54°F | – | – | 12 h 10 min |
| September 23 | 90°F | 54°F | – | – | 12 h 10 min |
| September 24 | 89°F | 54°F | – | – | 12 h 10 min |
| September 25 | 89°F | 53°F | – | – | 12 h 10 min |
| September 26 | 89°F | 53°F | – | – | 12 h |
| September 27 | 88°F | 53°F | – | – | 12 h |
| September 28 | 88°F | 53°F | – | – | 12 h |
| September 29 | 88°F | 53°F | – | – | 11 h 50 min |
| September 30 | 87°F | 52°F | – | – | 11 h 50 min |
- Normal high
- 91°FSeptember average
- Normal low
- 55°FSeptember average
- Precipitation
- 0.25 inmonth total
- Days at 90°F or more
- 20
- Daylight
- 13 h 10 min to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 30
- Days at 80°F or more
- 28
- Sunshine
- 95%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00041715; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Chico in September?
In a normal September in Chico, 20 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00041715.
What are the records for September in Chico?
The warmest September temperature on this station's record (since 1906) is 114°F, on September 4, 1988; the coldest is 35°F, on September 28, 1986. The wettest September brought 5.90 in (1912).
Source: records: ACIS, station USC00041715. Records and recent months use complete months only.
How does September in Chico 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; Chico's is 91°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.