Chico climate

Chico Weather in September

NOAA 1991-2020 normals for Chico Univ Farm, 4.4 km from Chico

Average highs run from 93°F on September 1 to 87°F on September 30, and lows from 57°F to 52°F. Normal precipitation for the month is 0.25 in.

September day by day

The normal high and low for each date, and the record, in °F.

Normal daily high and low temperature at Chico, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
91°F
Average low
55°F
Precipitation
0.25 in
Record high
115°FSep 7, 2022
Record low
35°FSep 27, 1986
Chance of a freeze
0%
Days of 90°F or more
20.0
Daylight
13 h 02 min to 11 h 48 min
Cloud cover
19%
Humidity
30%
Dew point
39°F
Wind
6.5 mph

Every day of the month

A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.

DateNormal highNormal lowRecord highRecord lowChance wetChance of snow
Sep 193°F57°F111°F 195045°F 19990%
Sep 293°F57°F109°F 201746°F 19640%
Sep 393°F57°F109°F 195045°F 19100%
Sep 493°F57°F114°F 198845°F 19120%
Sep 593°F56°F106°F 194343°F 19200%
Sep 693°F56°F109°F 194444°F 19220%
Sep 793°F56°F115°F 202241°F 19850%
Sep 892°F56°F112°F 194443°F 19270%
Sep 992°F56°F112°F 202245°F 19270%
Sep 1092°F56°F108°F 192243°F 20100%
Sep 1192°F56°F108°F 201539°F 19780%
Sep 1292°F56°F110°F 201143°F 19830%
Sep 1392°F55°F109°F 197139°F 19100%
Sep 1492°F55°F107°F 197139°F 19700%
Sep 1591°F55°F107°F 202542°F 19700%
Sep 1691°F55°F107°F 191344°F 19060%
Sep 1791°F55°F109°F 191341°F 19060%
Sep 1891°F55°F107°F 191340°F 19070%
Sep 1991°F55°F105°F 191341°F 19260%
Sep 2090°F54°F106°F 200041°F 19240%
Sep 2190°F54°F107°F 194338°F 19680%
Sep 2290°F54°F109°F 194340°F 20100%
Sep 2390°F54°F105°F 200939°F 19780%
Sep 2489°F54°F103°F 193638°F 19780%
Sep 2589°F53°F105°F 194437°F 19480%
Sep 2689°F53°F108°F 194440°F 19080%
Sep 2788°F53°F102°F 199135°F 19860%
Sep 2888°F53°F102°F 200935°F 19860%
Sep 2988°F53°F106°F 196640°F 19550%
Sep 3087°F52°F106°F 201038°F 19710%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Chico, in percent, and of at least 0.1 inch of snowfall.00.21102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (PDT).

September 1
sunrise 6:36 AM, sunset 7:38 PM
September 30
sunrise 7:03 AM, sunset 6:51 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00041715 (Chico Univ Farm), public domain. Records: NOAA GHCN-Daily, station USC00041715, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.