Mountain Road climate

Mountain Road Weather in September

NOAA 1991-2020 normals for S Boston, 11.9 km from Mountain Road

Average highs run from 86°F on September 1 to 78°F on September 30, and lows from 64°F to 53°F. Normal precipitation for the month is 4.69 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 Mountain Road, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
83°F
Average low
59°F
Precipitation
4.69 in
Record high
104°FSep 5, 2026
Record low
29°FSep 26, 1983
Chance of a freeze
0%
Days of 90°F or more
4.5
Daylight
12 h 57 min to 11 h 51 min
Cloud cover
54%
Humidity
72%
Dew point
59°F
Wind
4.0 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 186°F64°F99°F 199149°F 202528%0%
Sep 286°F63°F100°F 198047°F 198328%0%
Sep 386°F63°F100°F 198047°F 198828%0%
Sep 486°F63°F99°F 202649°F 198228%0%
Sep 586°F63°F104°F 202644°F 199728%0%
Sep 685°F62°F97°F 198341°F 198228%0%
Sep 785°F62°F98°F 198338°F 198228%0%
Sep 885°F62°F100°F 199041°F 198828%0%
Sep 985°F61°F97°F 201640°F 198228%0%
Sep 1084°F61°F98°F 201646°F 198628%0%
Sep 1184°F61°F98°F 198346°F 199828%0%
Sep 1284°F61°F100°F 198347°F 199328%0%
Sep 1384°F60°F98°F 198346°F 199328%0%
Sep 1483°F60°F96°F 202639°F 198528%0%
Sep 1583°F60°F98°F 199140°F 198528%0%
Sep 1683°F59°F95°F 199140°F 198528%0%
Sep 1782°F59°F96°F 199141°F 198328%0%
Sep 1882°F58°F103°F 199142°F 198428%0%
Sep 1982°F58°F93°F 197840°F 198428%0%
Sep 2081°F58°F93°F 197840°F 198429%0%
Sep 2181°F57°F91°F 201742°F 198129%0%
Sep 2281°F57°F94°F 198039°F 202029%0%
Sep 2381°F56°F97°F 198030°F 198329%0%
Sep 2480°F56°F95°F 201931°F 198329%0%
Sep 2580°F56°F92°F 201031°F 198329%0%
Sep 2680°F55°F93°F 198629°F 198329%0%
Sep 2779°F55°F95°F 201931°F 198329%0%
Sep 2879°F54°F94°F 199835°F 198229%0%
Sep 2978°F54°F97°F 201934°F 198129%0%
Sep 3078°F53°F99°F 201934°F 198129%0%

Chance of rain

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

September 1
sunrise 6:47 AM, sunset 7:44 PM
September 30
sunrise 7:10 AM, sunset 7:01 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00447925 (S Boston), public domain. Records: NOAA GHCN-Daily, station USC00447925, 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 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.