Boothbay Harbor climate

Boothbay Harbor Weather in September

NOAA 1991-2020 normals for Westport Island, 7.6 km from Boothbay Harbor

Average highs run from 74°F on September 1 to 64°F on September 30, and lows from 56°F to 47°F. Normal precipitation for the month is 4.32 in over about 9 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 Boothbay Harbor, in °F, with the record for each date.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
69°F
Average low
51°F
Precipitation
4.32 in
Record high
95°FSep 9, 2002
Record low
28°FSep 29, 2000
Chance of a freeze
3%
Daylight
13 h 12 min to 11 h 46 min
Cloud cover
56%
Humidity
81%
Dew point
54°F
Wind
6.9 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 174°F56°F91°F 201036°F 200230%0%
Sep 274°F56°F91°F 201041°F 200130%0%
Sep 374°F55°F92°F 199942°F 200130%0%
Sep 473°F55°F85°F 200842°F 199730%0%
Sep 573°F55°F91°F 202341°F 200030%0%
Sep 673°F55°F87°F 201836°F 200030%0%
Sep 772°F54°F89°F 201539°F 200030%0%
Sep 872°F54°F90°F 201544°F 201330%0%
Sep 972°F54°F95°F 200240°F 200330%0%
Sep 1071°F53°F89°F 200237°F 200330%0%
Sep 1171°F53°F86°F 201338°F 200830%0%
Sep 1271°F53°F84°F 200540°F 200230%0%
Sep 1370°F52°F83°F 202439°F 200230%0%
Sep 1470°F52°F83°F 201639°F 200431%0%
Sep 1570°F52°F83°F 201535°F 200131%0%
Sep 1669°F51°F85°F 201537°F 200131%0%
Sep 1769°F51°F86°F 202435°F 201132%0%
Sep 1869°F51°F84°F 202435°F 200732%0%
Sep 1968°F50°F79°F 202433°F 201433%0%
Sep 2068°F50°F79°F 201932°F 201433%0%
Sep 2167°F50°F82°F 201630°F 202034%0%
Sep 2267°F49°F82°F 201631°F 202034%0%
Sep 2366°F49°F85°F 201736°F 200835%0%
Sep 2466°F49°F87°F 201733°F 199835%0%
Sep 2566°F48°F84°F 201735°F 200036%0%
Sep 2665°F48°F85°F 200731°F 200936%0%
Sep 2765°F48°F83°F 201431°F 201537%0%
Sep 2864°F47°F80°F 202532°F 200038%0%
Sep 2964°F47°F80°F 202528°F 200038%0%
Sep 3064°F47°F76°F 202432°F 200039%0%

Chance of rain

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

September 1
sunrise 6:02 AM, sunset 7:14 PM
September 30
sunrise 6:35 AM, sunset 6:21 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00179547 (Westport Island), public domain. Records: NOAA GHCN-Daily, station USW00094623, 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.