Frisco climate

Frisco Weather in September

NOAA 1991-2020 normals for Richardson, 18.8 km from Frisco

Average highs run from 91°F on September 1 to 83°F on September 30, and lows from 71°F to 62°F. Normal precipitation for the month is 3.30 in over about 6 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 Frisco, in °F, with the record for each date.406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
87°F
Average low
67°F
Precipitation
3.30 in
Record high
107°FSep 8, 2023
Record low
52°FSep 24, 2009
Chance of a freeze
0%
Days of 90°F or more
13.3
Daylight
12 h 50 min to 11 h 52 min
Cloud cover
42%
Humidity
63%
Dew point
62°F
Wind
8.5 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
Sep 191°F71°F103°F 201367°F 200920%0%
Sep 291°F71°F101°F 201168°F 200720%0%
Sep 391°F71°F99°F 201168°F 201020%0%
Sep 490°F71°F101°F 202564°F 200820%0%
Sep 590°F70°F101°F 202361°F 201020%0%
Sep 690°F70°F102°F 202360°F 201120%0%
Sep 790°F70°F105°F 202355°F 201720%0%
Sep 889°F69°F107°F 202356°F 201720%0%
Sep 989°F69°F97°F 201460°F 202420%0%
Sep 1089°F69°F95°F 201956°F 202020%0%
Sep 1189°F69°F96°F 201158°F 201720%0%
Sep 1288°F68°F102°F 201155°F 201520%0%
Sep 1388°F68°F106°F 201154°F 201420%0%
Sep 1488°F68°F98°F 202458°F 200620%0%
Sep 1587°F67°F98°F 202459°F 200820%0%
Sep 1687°F67°F97°F 201353°F 200820%0%
Sep 1787°F67°F95°F 201653°F 200820%0%
Sep 1887°F67°F97°F 202458°F 200820%0%
Sep 1986°F66°F99°F 202456°F 200620%0%
Sep 2086°F66°F99°F 202457°F 202020%0%
Sep 2186°F66°F97°F 201957°F 202020%0%
Sep 2286°F65°F97°F 202256°F 201320%0%
Sep 2385°F65°F98°F 202354°F 202120%0%
Sep 2485°F65°F99°F 202352°F 200920%0%
Sep 2585°F64°F96°F 202259°F 201320%0%
Sep 2685°F64°F93°F 201353°F 200620%0%
Sep 2784°F64°F94°F 202352°F 201020%0%
Sep 2884°F63°F95°F 202352°F 201020%0%
Sep 2984°F63°F99°F 201152°F 200920%0%
Sep 3083°F62°F95°F 202455°F 201620%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Frisco, in percent, and of at least 0.1 inch of snowfall.05101520251102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CDT).

September 1
sunrise 7:02 AM, sunset 7:52 PM
September 30
sunrise 7:21 AM, sunset 7:13 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00417588 (Richardson), public domain. Records: NOAA GHCN-Daily, station USC00417588, 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.