Peterborough climate

Peterborough Weather in September

NOAA 1991-2020 normals for Jaffrey Silver Rch Airpark, 8.2 km from Peterborough

Average highs run from 77°F on September 1 to 67°F on September 30, and lows from 56°F to 45°F. Normal precipitation for the month is 4.26 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 Peterborough, in °F, with the record for each date.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
73°F
Average low
51°F
Precipitation
4.26 in
Record high
92°FSep 2, 2010
Record low
26°FSep 29, 2000
Chance of a freeze
23%
Daylight
13 h 10 min to 11 h 47 min
Cloud cover
56%
Humidity
77%
Dew point
52°F
Wind
3.8 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 177°F56°F91°F 201039°F 20090%
Sep 277°F55°F92°F 201038°F 20170%
Sep 377°F55°F91°F 201845°F 20010%
Sep 477°F55°F89°F 201844°F 20070%
Sep 576°F54°F90°F 202337°F 20000%
Sep 676°F54°F90°F 202335°F 20000%
Sep 776°F54°F92°F 202341°F 20000%
Sep 876°F54°F89°F 201542°F 20130%
Sep 975°F53°F91°F 200237°F 20130%
Sep 1075°F53°F88°F 200238°F 20090%
Sep 1175°F53°F89°F 201337°F 20060%
Sep 1274°F52°F87°F 200533°F 20060%
Sep 1374°F52°F86°F 200540°F 20060%
Sep 1474°F51°F85°F 200538°F 20010%
Sep 1573°F51°F82°F 201834°F 20010%
Sep 1673°F51°F86°F 201836°F 20010%
Sep 1772°F50°F84°F 201732°F 20130%
Sep 1872°F50°F82°F 202134°F 20070%
Sep 1972°F50°F78°F 200530°F 20200%
Sep 2071°F49°F80°F 199828°F 20200%
Sep 2171°F49°F83°F 201928°F 20200%
Sep 2270°F48°F83°F 201928°F 20200%
Sep 2370°F48°F86°F 201735°F 19980%
Sep 2469°F47°F90°F 201732°F 19980%
Sep 2569°F47°F88°F 201735°F 19970%
Sep 2669°F47°F88°F 201731°F 20090%
Sep 2768°F46°F86°F 201731°F 20150%
Sep 2868°F46°F82°F 201429°F 20000%
Sep 2967°F45°F78°F 202026°F 20000%
Sep 3067°F45°F76°F 202532°F 20000%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Peterborough, 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 6:12 AM, sunset 7:22 PM
September 30
sunrise 6:44 AM, sunset 6:31 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00274304 (Jaffrey Silver Rch Airpark), public domain. Records: NOAA GHCN-Daily, station USW00054770, 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.