Groton climate

Groton Weather in October

NOAA 1991-2020 normals for Nashua Cwsu, 15.7 km from Groton

Average highs run from 69°F on October 1 to 57°F on October 31, and lows from 45°F to 34°F. Normal precipitation for the month is 4.66 in.

October day by day

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

Normal daily high and low temperature at Groton, in °F, with the record for each date.020406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

October at a glance

Average high
62°F
Average low
39°F
Precipitation
4.66 in
Record high
87°FOct 5, 2007
Record low
15°FOct 31, 2020
Chance of a freeze
95%
Daylight
11 h 44 min to 10 h 21 min
Cloud cover
60%
Humidity
78%
Dew point
44°F
Wind
5.6 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
Oct 169°F45°F81°F 201336°F 19980%
Oct 268°F45°F84°F 200233°F 19970%
Oct 368°F44°F85°F 202334°F 20030%
Oct 467°F44°F85°F 202334°F 20080%
Oct 567°F43°F87°F 200732°F 20190%
Oct 666°F43°F86°F 200730°F 19980%
Oct 766°F42°F83°F 202530°F 19990%
Oct 865°F42°F82°F 201128°F 19990%
Oct 965°F42°F86°F 201130°F 20010%
Oct 1065°F41°F84°F 201127°F 20250%
Oct 1164°F41°F77°F 200133°F 20160%
Oct 1264°F40°F79°F 201531°F 20090%
Oct 1363°F40°F74°F 200026°F 20120%
Oct 1463°F39°F79°F 200029°F 20060%
Oct 1563°F39°F80°F 201427°F 20020%
Oct 1662°F39°F76°F 202131°F 20240%
Oct 1762°F38°F79°F 201628°F 20240%
Oct 1861°F38°F78°F 199824°F 20150%
Oct 1961°F37°F79°F 201621°F 20150%
Oct 2061°F37°F78°F 202425°F 20080%
Oct 2160°F37°F81°F 202424°F 20180%
Oct 2260°F36°F81°F 200722°F 20180%
Oct 2360°F36°F79°F 202427°F 20080%
Oct 2459°F36°F79°F 200125°F 20081%
Oct 2559°F35°F77°F 200125°F 20021%
Oct 2658°F35°F80°F 202325°F 20131%
Oct 2758°F35°F81°F 202326°F 20151%
Oct 2858°F35°F80°F 202325°F 20011%
Oct 2957°F34°F75°F 201524°F 20011%
Oct 3057°F34°F71°F 202219°F 20201%
Oct 3157°F34°F79°F 202415°F 20201%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Groton, in percent, and of at least 0.1 inch of snowfall.00.20.40.60.811102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (EDT).

October 1
sunrise 6:44 AM, sunset 6:28 PM
October 31
sunrise 7:19 AM, sunset 5:40 PM

Every day of October: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00275703 (Nashua Cwsu), public domain. Records: NOAA GHCN-Daily, station USW00004780, 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.