Sandwich climate

Sandwich Weather in September

NOAA 1991-2020 normals for Chicago Aurora Muni AP, 18.1 km from Sandwich

Average highs run from 80°F on September 1 to 71°F on September 30, and lows from 56°F to 46°F. Normal precipitation for the month is 3.01 in over about 11 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 Sandwich, in °F, with the record for each date.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
76°F
Average low
52°F
Precipitation
3.01 in
Record high
95°FSep 13, 2005
Record low
29°FSep 24, 2012
Chance of a freeze
17%
Days of 90°F or more
2.0
Daylight
13 h 07 min to 11 h 48 min
Cloud cover
48%
Humidity
72%
Dew point
55°F
Wind
8.7 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°F56°F93°F 200041°F 200938%0%
Sep 280°F56°F93°F 202639°F 201738%0%
Sep 380°F56°F91°F 202346°F 200538%0%
Sep 480°F56°F92°F 201841°F 202538%0%
Sep 579°F55°F90°F 199943°F 200338%0%
Sep 679°F55°F92°F 201540°F 200037%0%
Sep 779°F55°F91°F 201639°F 202537%0%
Sep 879°F54°F91°F 200238°F 202537%0%
Sep 979°F54°F92°F 201342°F 199937%0%
Sep 1078°F54°F94°F 201340°F 199937%0%
Sep 1178°F53°F93°F 200041°F 199937%0%
Sep 1278°F53°F92°F 200538°F 200737%0%
Sep 1377°F53°F95°F 200536°F 201437%0%
Sep 1477°F52°F90°F 202436°F 200736%0%
Sep 1577°F52°F90°F 202432°F 200736%0%
Sep 1676°F52°F90°F 201836°F 200036%0%
Sep 1776°F51°F92°F 201839°F 199936%0%
Sep 1876°F51°F89°F 200738°F 201236%0%
Sep 1975°F51°F91°F 202135°F 201236%0%
Sep 2075°F50°F95°F 201834°F 200336%0%
Sep 2175°F50°F93°F 202436°F 199935%0%
Sep 2274°F49°F93°F 201733°F 199935%0%
Sep 2374°F49°F93°F 201731°F 201235%0%
Sep 2474°F49°F92°F 200729°F 201235%0%
Sep 2573°F48°F92°F 201736°F 200335%0%
Sep 2673°F48°F90°F 201734°F 200035%0%
Sep 2772°F48°F88°F 202134°F 202235%0%
Sep 2872°F47°F86°F 202536°F 200335%0%
Sep 2971°F47°F91°F 202531°F 202235%0%
Sep 3071°F46°F86°F 202532°F 200435%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Sandwich, 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 6:21 AM, sunset 7:28 PM
September 30
sunrise 6:50 AM, sunset 6:38 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00004808 (Chicago Aurora Muni AP), public domain. Records: NOAA GHCN-Daily, station USW00004808, 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.