Chalfont climate

Chalfont Weather in September

NOAA 1991-2020 normals for Sellersville, 11.6 km from Chalfont

Average highs run from 81°F on September 1 to 71°F on September 30, and lows from 58°F to 48°F. Normal precipitation for the month is 4.91 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 Chalfont, in °F, with the record for each date.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
77°F
Average low
54°F
Precipitation
4.91 in
Record high
96°FSep 8, 2016
Record low
37°FSep 30, 2000
Chance of a freeze
2%
Days of 90°F or more
1.2
Daylight
13 h 04 min to 11 h 49 min
Cloud cover
55%
Humidity
73%
Dew point
56°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 181°F58°F95°F 201051°F 200930%0%
Sep 281°F58°F92°F 201049°F 201730%0%
Sep 381°F58°F92°F 201850°F 202430%0%
Sep 480°F57°F95°F 202348°F 202430%0%
Sep 580°F57°F93°F 202350°F 201029%0%
Sep 680°F57°F94°F 201847°F 201029%0%
Sep 780°F57°F95°F 202346°F 201329%0%
Sep 879°F56°F96°F 201649°F 200029%0%
Sep 979°F56°F95°F 201648°F 202429%0%
Sep 1079°F56°F95°F 201649°F 201229%0%
Sep 1179°F55°F92°F 201346°F 201229%0%
Sep 1278°F55°F90°F 200548°F 200630%0%
Sep 1378°F55°F91°F 200549°F 200730%0%
Sep 1478°F55°F94°F 201644°F 201330%0%
Sep 1577°F54°F88°F 200542°F 201330%0%
Sep 1677°F54°F87°F 200543°F 200730%0%
Sep 1776°F53°F85°F 200544°F 200730%0%
Sep 1876°F53°F87°F 202146°F 200730%0%
Sep 1976°F53°F88°F 202444°F 201330%0%
Sep 2075°F52°F86°F 201742°F 202031%0%
Sep 2175°F52°F88°F 201942°F 202031%0%
Sep 2274°F51°F89°F 201942°F 202031%0%
Sep 2374°F51°F93°F 201942°F 201431%0%
Sep 2474°F51°F91°F 201742°F 201332%0%
Sep 2573°F50°F90°F 201742°F 201232%0%
Sep 2673°F50°F90°F 200741°F 200132%0%
Sep 2772°F49°F90°F 201743°F 200033%0%
Sep 2872°F49°F86°F 202544°F 200133%0%
Sep 2971°F48°F85°F 201938°F 200033%0%
Sep 3071°F48°F84°F 202537°F 200033%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Chalfont, 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 6:28 AM, sunset 7:32 PM
September 30
sunrise 6:56 AM, sunset 6:45 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00367938 (Sellersville), public domain. Records: NOAA GHCN-Daily, station USW00054786, 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.