Brunswick climate

Brunswick Weather in September

NOAA 1991-2020 normals for Sharpsburg 5 S, 12.3 km from Brunswick

Average highs run from 83°F on September 1 to 73°F on September 30, and lows from 58°F to 48°F. Normal precipitation for the month is 4.40 in.

September day by day

The normal high and low for each date, and the record, in °F.

Normal daily high and low temperature at Brunswick, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
78°F
Average low
54°F
Precipitation
4.40 in
Record high
102°FSep 1, 1930
Record low
28°FSep 26, 1943
Chance of a freeze
2%
Days of 90°F or more
2.9
Daylight
13 h 02 min to 11 h 49 min
Cloud cover
55%
Humidity
70%
Dew point
56°F
Wind
6.3 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°F58°F102°F 193045°F 19340%
Sep 283°F58°F100°F 195345°F 19480%
Sep 382°F58°F100°F 195341°F 19490%
Sep 482°F57°F97°F 192544°F 19460%
Sep 582°F57°F97°F 191345°F 19460%
Sep 682°F57°F97°F 193044°F 19090%
Sep 781°F57°F96°F 191341°F 19240%
Sep 881°F56°F99°F 193943°F 19440%
Sep 981°F56°F96°F 194641°F 19440%
Sep 1080°F56°F98°F 193138°F 19140%
Sep 1180°F55°F98°F 193135°F 19170%
Sep 1280°F55°F99°F 193136°F 19170%
Sep 1379°F55°F95°F 193136°F 19430%
Sep 1479°F54°F95°F 193137°F 19460%
Sep 1579°F54°F99°F 193034°F 19460%
Sep 1678°F54°F96°F 199137°F 19460%
Sep 1778°F53°F94°F 199140°F 19230%
Sep 1877°F53°F93°F 192534°F 19430%
Sep 1977°F53°F94°F 198333°F 19430%
Sep 2077°F52°F93°F 189539°F 19160%
Sep 2176°F52°F96°F 193131°F 19270%
Sep 2276°F52°F98°F 193134°F 19040%
Sep 2375°F51°F96°F 189531°F 19040%
Sep 2475°F51°F93°F 193035°F 19740%
Sep 2575°F50°F98°F 193032°F 19420%
Sep 2674°F50°F96°F 193028°F 19430%
Sep 2774°F50°F93°F 198635°F 19400%
Sep 2873°F49°F92°F 199829°F 19470%
Sep 2973°F49°F91°F 195328°F 19420%
Sep 3073°F48°F93°F 198629°F 19420%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Brunswick, in percent, and of at least 0.1 inch of snowfall.00.21102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (EDT).

September 1
sunrise 6:39 AM, sunset 7:41 PM
September 30
sunrise 7:06 AM, sunset 6:55 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00188207 (Sharpsburg 5 S), public domain. Records: NOAA GHCN-Daily, station USC00183348, 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.