Marengo climate

Marengo Weather in September

NOAA 1991-2020 normals for Williamsburg 1E, 16 km from Marengo

Average highs run from 80°F on September 1 to 71°F on September 30, and lows from 56°F to 45°F. Normal precipitation for the month is 3.80 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 Marengo, 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
51°F
Precipitation
3.80 in
Record high
99°FSep 9, 2013
Record low
27°FSep 29, 1984
Chance of a freeze
24%
Days of 90°F or more
2.0
Daylight
13 h 07 min to 11 h 47 min
Cloud cover
49%
Humidity
71%
Dew point
53°F
Wind
9.4 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°F56°F98°F 195344°F 196728%0%
Sep 280°F56°F96°F 195345°F 196728%0%
Sep 380°F56°F96°F 202337°F 197428%0%
Sep 480°F55°F97°F 202338°F 197428%0%
Sep 579°F55°F94°F 195442°F 197428%0%
Sep 679°F55°F94°F 195441°F 202528%0%
Sep 779°F54°F96°F 198538°F 198628%0%
Sep 879°F54°F94°F 197138°F 198628%0%
Sep 979°F53°F99°F 201341°F 199528%0%
Sep 1078°F53°F97°F 201337°F 197627%0%
Sep 1178°F53°F95°F 200040°F 195527%0%
Sep 1278°F52°F92°F 196236°F 197527%0%
Sep 1377°F52°F93°F 202535°F 197527%0%
Sep 1477°F51°F93°F 199436°F 199627%0%
Sep 1577°F51°F92°F 195531°F 200727%0%
Sep 1677°F51°F90°F 195537°F 198427%0%
Sep 1776°F50°F91°F 198839°F 198027%0%
Sep 1876°F50°F94°F 197236°F 201227%0%
Sep 1976°F49°F90°F 198433°F 199126%0%
Sep 2075°F49°F96°F 202229°F 199126%0%
Sep 2175°F49°F93°F 201733°F 197426%0%
Sep 2274°F48°F93°F 201729°F 197426%0%
Sep 2374°F48°F93°F 201729°F 201226%0%
Sep 2474°F47°F92°F 198428°F 201226%0%
Sep 2573°F47°F92°F 201734°F 200126%0%
Sep 2673°F47°F88°F 202130°F 198426%0%
Sep 2772°F46°F89°F 195434°F 198526%0%
Sep 2872°F46°F97°F 195333°F 196126%0%
Sep 2972°F45°F92°F 195327°F 198426%0%
Sep 3071°F45°F94°F 202328°F 200326%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Marengo, in percent, and of at least 0.1 inch of snowfall.01020301102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CDT).

September 1
sunrise 6:34 AM, sunset 7:41 PM
September 30
sunrise 7:04 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 USC00139067 (Williamsburg 1E), public domain. Records: NOAA GHCN-Daily, station USW00014990, 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.