Bartlett climate

Bartlett Weather in September

NOAA 1991-2020 normals for Streamwood, 3.5 km from Bartlett

Average highs run from 83°F on September 1 to 72°F on September 30, and lows from 57°F to 45°F. Normal precipitation for the month is 3.58 in over about 8 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 Bartlett, in °F, with the record for each date.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
78°F
Average low
51°F
Precipitation
3.58 in
Record high
97°FSep 2, 2000
Record low
26°FSep 23, 1995
Chance of a freeze
13%
Days of 90°F or more
2.4
Daylight
13 h 08 min to 11 h 47 min
Cloud cover
59%
Humidity
73%
Dew point
54°F
Wind
9.2 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 183°F57°F95°F 200037°F 200928%0%
Sep 283°F57°F97°F 200038°F 200928%0%
Sep 383°F57°F94°F 200042°F 200128%0%
Sep 482°F56°F94°F 199940°F 199728%0%
Sep 582°F56°F95°F 199942°F 199728%0%
Sep 682°F55°F96°F 199936°F 200028%0%
Sep 781°F55°F95°F 199841°F 200028%0%
Sep 881°F55°F95°F 200546°F 199928%0%
Sep 981°F54°F95°F 200243°F 200828%0%
Sep 1080°F54°F93°F 200238°F 200828%0%
Sep 1180°F54°F93°F 200540°F 200828%0%
Sep 1280°F53°F94°F 200539°F 200728%0%
Sep 1379°F53°F95°F 200541°F 200728%0%
Sep 1479°F52°F96°F 200542°F 199628%0%
Sep 1579°F52°F92°F 199434°F 200728%0%
Sep 1678°F51°F91°F 199435°F 200028%0%
Sep 1778°F51°F86°F 199436°F 200028%0%
Sep 1877°F50°F86°F 200641°F 199528%0%
Sep 1977°F50°F90°F 200743°F 200629%0%
Sep 2077°F50°F88°F 199838°F 200329%0%
Sep 2176°F49°F88°F 200535°F 200629%0%
Sep 2276°F49°F92°F 200534°F 199529%0%
Sep 2375°F48°F91°F 200526°F 199529%0%
Sep 2475°F48°F91°F 201028°F 199530%0%
Sep 2574°F47°F91°F 200734°F 199530%0%
Sep 2674°F47°F85°F 200734°F 200030%0%
Sep 2774°F46°F92°F 199834°F 200030%0%
Sep 2873°F46°F84°F 199837°F 200030%0%
Sep 2973°F46°F82°F 199533°F 200630%0%
Sep 3072°F45°F88°F 200234°F 199931%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Bartlett, 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 6:18 AM, sunset 7:26 PM
September 30
sunrise 6:49 AM, sunset 6:36 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00118324 (Streamwood), public domain. Records: NOAA GHCN-Daily, station USC00118324, 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.