Avondale climate

Avondale Weather in September

NOAA 1991-2020 normals for Chicago Ohare Intl AP, 19.4 km from Avondale

Average highs run from 80°F on September 1 to 70°F on September 30, and lows from 62°F to 51°F. Normal precipitation for the month is 3.19 in over about 9 wet days.

September day by day

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

Normal daily high and low temperature at Avondale, in °F, with the record for each date.406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
76°F
Average low
57°F
Precipitation
3.19 in
Record high
96°FSep 2, 2026
Record low
42°FSep 13, 2014
Chance of a freeze
0%
Days of 90°F or more
1.6
Daylight
13 h 07 min to 11 h 47 min
Cloud cover
59%
Humidity
75%
Dew point
57°F
Wind
11.4 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 180°F62°F94°F 200050°F 200929%0%
Sep 280°F62°F96°F 202650°F 201728%0%
Sep 380°F62°F93°F 201552°F 199728%0%
Sep 480°F62°F93°F 201849°F 199728%0%
Sep 579°F61°F94°F 199952°F 199728%0%
Sep 679°F61°F94°F 199850°F 201729%0%
Sep 779°F61°F94°F 201649°F 202529%0%
Sep 878°F60°F94°F 200249°F 202429%0%
Sep 978°F60°F94°F 201349°F 200829%0%
Sep 1078°F59°F96°F 201350°F 200829%0%
Sep 1177°F59°F92°F 201351°F 200729%0%
Sep 1277°F59°F90°F 200546°F 200729%0%
Sep 1377°F58°F94°F 200542°F 201429%0%
Sep 1476°F58°F88°F 202146°F 201429%0%
Sep 1576°F58°F89°F 202442°F 200729%0%
Sep 1676°F57°F90°F 202447°F 200029%0%
Sep 1775°F57°F92°F 201849°F 201429%0%
Sep 1875°F56°F89°F 200049°F 202029%0%
Sep 1974°F56°F91°F 200047°F 201230%0%
Sep 2074°F55°F95°F 201844°F 200630%0%
Sep 2174°F55°F95°F 201747°F 200030%0%
Sep 2273°F55°F95°F 201746°F 199930%0%
Sep 2373°F54°F95°F 201743°F 201230%0%
Sep 2472°F54°F92°F 201742°F 201230%0%
Sep 2572°F53°F92°F 201743°F 200130%0%
Sep 2672°F53°F93°F 201743°F 200030%0%
Sep 2771°F53°F89°F 202547°F 200131%0%
Sep 2871°F52°F85°F 201345°F 200631%0%
Sep 2970°F52°F90°F 202542°F 200331%0%
Sep 3070°F51°F87°F 201942°F 200331%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Avondale, in percent, and of at least 0.1 inch of snowfall.0102030401102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CDT).

September 1
sunrise 6:17 AM, sunset 7:24 PM
September 30
sunrise 6:47 AM, sunset 6:34 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00094846 (Chicago Ohare Intl AP), public domain. Records: NOAA GHCN-Daily, station USW00014819, 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.