Sussex County climate

Sussex County Weather in September

NOAA 1991-2020 normals for Stony Creek 2 N, 13.9 km from Sussex County

Average highs run from 85°F on September 1 to 77°F on September 30, and lows from 64°F to 54°F. Normal precipitation for the month is 4.81 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 Sussex County, in °F, with the record for each date.406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
82°F
Average low
59°F
Precipitation
4.81 in
Record high
99°FSep 4, 2026
Record low
42°FSep 24, 1998
Chance of a freeze
0%
Days of 90°F or more
4.3
Daylight
12 h 57 min to 11 h 50 min
Cloud cover
54%
Humidity
75%
Dew point
61°F
Wind
3.8 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 185°F64°F97°F 202651°F 202522%0%
Sep 285°F64°F96°F 201453°F 202322%0%
Sep 385°F63°F97°F 202652°F 202521%0%
Sep 485°F63°F99°F 202655°F 202421%0%
Sep 585°F63°F95°F 202352°F 201021%0%
Sep 684°F63°F96°F 202353°F 201021%0%
Sep 784°F62°F96°F 202353°F 200121%0%
Sep 884°F62°F92°F 201549°F 202421%0%
Sep 984°F62°F94°F 201547°F 202421%0%
Sep 1083°F61°F91°F 200750°F 199821%0%
Sep 1183°F61°F94°F 200749°F 201021%0%
Sep 1283°F61°F95°F 201949°F 201221%0%
Sep 1383°F61°F93°F 200849°F 200221%0%
Sep 1482°F60°F93°F 201048°F 201522%0%
Sep 1582°F60°F91°F 201046°F 201322%0%
Sep 1682°F59°F92°F 201048°F 200022%0%
Sep 1781°F59°F92°F 200546°F 200022%0%
Sep 1881°F59°F90°F 201646°F 201322%0%
Sep 1981°F58°F90°F 202149°F 200422%0%
Sep 2080°F58°F90°F 200546°F 201922%0%
Sep 2180°F58°F91°F 202246°F 200622%0%
Sep 2280°F57°F95°F 201045°F 200623%0%
Sep 2379°F57°F98°F 201043°F 199923%0%
Sep 2479°F56°F96°F 201042°F 199823%0%
Sep 2579°F56°F95°F 201046°F 201223%0%
Sep 2678°F56°F93°F 201943°F 200123%0%
Sep 2778°F55°F93°F 199847°F 200123%0%
Sep 2878°F55°F94°F 201942°F 202223%0%
Sep 2977°F54°F93°F 201945°F 200123%0%
Sep 3077°F54°F87°F 199843°F 200323%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Sussex County, 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 (EDT).

September 1
sunrise 6:40 AM, sunset 7:37 PM
September 30
sunrise 7:04 AM, sunset 6:54 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00448129 (Stony Creek 2 N), public domain. Records: NOAA GHCN-Daily, station USW00093773, 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.