Unionville climate

Unionville Weather in September

NOAA 1991-2020 normals for Christiana 5W, 13.2 km from Unionville

Average highs run from 86°F on September 1 to 78°F on September 30, and lows from 62°F to 52°F. Normal precipitation for the month is 4.41 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 Unionville, 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
57°F
Precipitation
4.41 in
Record high
105°FSep 6, 1954
Record low
32°FSep 30, 1967
Chance of a freeze
0%
Days of 90°F or more
4.6
Daylight
12 h 54 min to 11 h 50 min
Cloud cover
48%
Humidity
68%
Dew point
59°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
Sep 186°F62°F104°F 195147°F 19540%
Sep 286°F62°F99°F 201146°F 19870%
Sep 386°F61°F100°F 195346°F 19870%
Sep 486°F61°F100°F 195445°F 19520%
Sep 585°F61°F103°F 195443°F 19970%
Sep 685°F60°F105°F 195448°F 19840%
Sep 785°F60°F103°F 195443°F 19880%
Sep 885°F60°F100°F 195445°F 19530%
Sep 985°F60°F97°F 198045°F 19580%
Sep 1084°F59°F97°F 195445°F 19980%
Sep 1184°F59°F97°F 198340°F 19690%
Sep 1284°F59°F96°F 196243°F 19690%
Sep 1384°F58°F97°F 201945°F 19690%
Sep 1483°F58°F98°F 198039°F 19640%
Sep 1583°F58°F97°F 199144°F 19640%
Sep 1683°F57°F98°F 198040°F 19610%
Sep 1783°F57°F97°F 195342°F 20000%
Sep 1882°F57°F99°F 195340°F 19810%
Sep 1982°F56°F97°F 195436°F 19810%
Sep 2082°F56°F97°F 195540°F 19810%
Sep 2181°F55°F98°F 195539°F 19560%
Sep 2281°F55°F98°F 195535°F 19830%
Sep 2381°F55°F95°F 201038°F 19740%
Sep 2480°F54°F94°F 196135°F 19830%
Sep 2580°F54°F93°F 201639°F 19630%
Sep 2680°F53°F90°F 195837°F 20010%
Sep 2779°F53°F94°F 201937°F 19910%
Sep 2879°F53°F93°F 195439°F 20220%
Sep 2979°F52°F96°F 201934°F 19670%
Sep 3078°F52°F96°F 201932°F 19670%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Unionville, 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 (CDT).

September 1
sunrise 6:19 AM, sunset 7:13 PM
September 30
sunrise 6:41 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 USC00401720 (Christiana 5W), public domain. Records: NOAA GHCN-Daily, station USC00408246, 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.