Stonington climate

Stonington Weather in October

NOAA 1991-2020 normals for Groton, 11.1 km from Stonington

Average highs run from 68°F on October 1 to 58°F on October 31, and lows from 52°F to 42°F. Normal precipitation for the month is 4.42 in over about 10 wet days.

October day by day

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

Normal daily high and low temperature at Stonington, in °F, with the record for each date.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

October at a glance

Average high
63°F
Average low
47°F
Precipitation
4.42 in
Record high
88°FOct 2, 2019
Record low
25°FOct 31, 2020
Chance of a freeze
43%
Daylight
11 h 45 min to 10 h 26 min
Cloud cover
59%
Humidity
77%
Dew point
47°F
Wind
6.5 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 168°F52°F77°F 201339°F 200935%0%
Oct 268°F52°F88°F 201937°F 200935%0%
Oct 368°F52°F77°F 201335°F 200335%0%
Oct 467°F51°F79°F 202338°F 200835%0%
Oct 567°F51°F77°F 200237°F 200435%0%
Oct 667°F50°F80°F 201733°F 200335%0%
Oct 766°F50°F79°F 201932°F 199935%0%
Oct 866°F50°F77°F 200730°F 199935%0%
Oct 966°F49°F86°F 201130°F 200135%0%
Oct 1065°F49°F84°F 201132°F 200035%0%
Oct 1165°F49°F75°F 201736°F 200934%0%
Oct 1265°F48°F74°F 202433°F 200034%0%
Oct 1364°F48°F73°F 200828°F 201234%0%
Oct 1464°F48°F79°F 202132°F 200934%0%
Oct 1564°F47°F76°F 200030°F 199934%0%
Oct 1663°F47°F74°F 202131°F 200634%0%
Oct 1763°F47°F74°F 201633°F 201234%0%
Oct 1863°F46°F74°F 201629°F 201534%0%
Oct 1962°F46°F77°F 201627°F 201534%0%
Oct 2062°F46°F73°F 201729°F 200333%0%
Oct 2162°F45°F74°F 201631°F 200833%0%
Oct 2261°F45°F76°F 201729°F 201833%0%
Oct 2361°F45°F71°F 200730°F 200833%0%
Oct 2461°F45°F74°F 202426°F 200833%0%
Oct 2560°F44°F75°F 202226°F 200333%0%
Oct 2660°F44°F71°F 202226°F 201333%0%
Oct 2760°F44°F69°F 200030°F 200633%0%
Oct 2859°F43°F74°F 202328°F 201333%0%
Oct 2959°F43°F69°F 201427°F 200133%0%
Oct 3059°F43°F72°F 201629°F 200833%0%
Oct 3158°F42°F71°F 201925°F 202033%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Stonington, 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).

October 1
sunrise 6:44 AM, sunset 6:29 PM
October 31
sunrise 7:18 AM, sunset 5:44 PM

Every day of October: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00063207 (Groton), public domain. Records: NOAA GHCN-Daily, station USW00014794, 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.