Brighton climate

Brighton Weather in September

NOAA 1991-2020 normals for Jerseyville 2 Sw, 18.8 km from Brighton

Average highs run from 83°F on September 1 to 74°F on September 30, and lows from 60°F to 49°F. Normal precipitation for the month is 3.44 in over about 7 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 Brighton, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
79°F
Average low
55°F
Precipitation
3.44 in
Record high
103°FSep 4, 1954
Record low
37°FSep 23, 1974
Chance of a freeze
4%
Days of 90°F or more
3.7
Daylight
13 h 02 min to 11 h 49 min
Cloud cover
46%
Humidity
69%
Dew point
56°F
Wind
7.8 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°F60°F101°F 195348°F 195523%0%
Sep 283°F60°F99°F 202646°F 194923%0%
Sep 383°F59°F99°F 202645°F 197423%0%
Sep 483°F59°F103°F 195443°F 197423%0%
Sep 582°F59°F103°F 195446°F 197423%0%
Sep 682°F58°F101°F 195450°F 195023%0%
Sep 782°F58°F99°F 196045°F 195623%0%
Sep 882°F58°F97°F 196042°F 198623%0%
Sep 981°F57°F98°F 198042°F 198623%0%
Sep 1081°F57°F98°F 196448°F 196923%0%
Sep 1181°F57°F97°F 201349°F 195923%0%
Sep 1281°F56°F96°F 195242°F 195523%0%
Sep 1380°F56°F95°F 195646°F 195323%0%
Sep 1480°F55°F99°F 202544°F 194923%0%
Sep 1580°F55°F97°F 197145°F 197423%0%
Sep 1679°F55°F96°F 195446°F 194323%0%
Sep 1779°F54°F96°F 195444°F 198123%0%
Sep 1879°F54°F97°F 202643°F 197323%0%
Sep 1978°F53°F94°F 194843°F 197323%0%
Sep 2078°F53°F95°F 197842°F 199123%0%
Sep 2178°F53°F95°F 201742°F 198223%0%
Sep 2277°F52°F93°F 195639°F 197423%0%
Sep 2377°F52°F96°F 200537°F 197424%0%
Sep 2477°F51°F90°F 200738°F 198324%0%
Sep 2576°F51°F88°F 198637°F 195024%0%
Sep 2676°F51°F92°F 194641°F 197524%0%
Sep 2776°F50°F89°F 199841°F 197524%0%
Sep 2875°F50°F94°F 195337°F 195724%0%
Sep 2975°F49°F100°F 195338°F 194924%0%
Sep 3074°F49°F98°F 195237°F 194924%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Brighton, in percent, and of at least 0.1 inch of snowfall.05101520251102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CDT).

September 1
sunrise 6:29 AM, sunset 7:31 PM
September 30
sunrise 6:56 AM, sunset 6:45 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00114489 (Jerseyville 2 Sw), public domain. Records: NOAA GHCN-Daily, station USC00110137, 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.