Collin County climate

Collin County Weather in March

NOAA 1991-2020 normals for Mckinney Muni AP, 1.9 km from Collin County

Average highs run from 63°F on March 1 to 72°F on March 31, and lows from 42°F to 49°F. Normal precipitation for the month is 3.51 in over about 9 wet days.

March day by day

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

Normal daily high and low temperature at Collin County, in °F, with the record for each date.020406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

March at a glance

Average high
68°F
Average low
46°F
Precipitation
3.51 in
Record high
92°FMar 22, 2026
Record low
13°FMar 3, 2002
Chance of a freeze
85%
Daylight
11 h 29 min to 12 h 31 min
Cloud cover
59%
Humidity
76%
Dew point
47°F
Wind
11.4 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
Mar 163°F42°F89°F 200626°F 200928%0%
Mar 263°F42°F82°F 202419°F 201428%0%
Mar 364°F42°F83°F 202613°F 200228%0%
Mar 464°F42°F85°F 201315°F 200228%0%
Mar 564°F43°F84°F 200919°F 201928%0%
Mar 665°F43°F82°F 200621°F 201528%0%
Mar 765°F43°F80°F 202525°F 201528%0%
Mar 865°F44°F81°F 201123°F 200828%0%
Mar 965°F44°F84°F 202625°F 202229%0%
Mar 1066°F44°F85°F 200629°F 200229%0%
Mar 1166°F44°F86°F 202028°F 202229%0%
Mar 1266°F45°F88°F 200622°F 202229%0%
Mar 1367°F45°F85°F 202528°F 201429%0%
Mar 1467°F45°F87°F 201631°F 201728%0%
Mar 1567°F45°F83°F 202629°F 199928%0%
Mar 1668°F46°F84°F 201829°F 202628%0%
Mar 1768°F46°F82°F 200427°F 200528%0%
Mar 1868°F46°F83°F 201131°F 202328%0%
Mar 1969°F46°F85°F 202627°F 202328%0%
Mar 2069°F47°F89°F 202631°F 201028%0%
Mar 2169°F47°F90°F 202630°F 201028%0%
Mar 2269°F47°F92°F 202629°F 200228%0%
Mar 2370°F47°F83°F 201731°F 200228%0%
Mar 2470°F48°F84°F 201830°F 200628%0%
Mar 2570°F48°F87°F 202528°F 201328%0%
Mar 2671°F48°F85°F 202625°F 201328%0%
Mar 2771°F48°F85°F 202233°F 200228%0%
Mar 2871°F49°F82°F 202233°F 200928%0%
Mar 2971°F49°F84°F 200230°F 200927%0%
Mar 3072°F49°F83°F 202527°F 200327%0%
Mar 3172°F49°F87°F 200634°F 201127%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Collin County, in percent, and of at least 0.1 inch of snowfall.01020301102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CDT).

March 1
sunrise 6:54 AM, sunset 6:23 PM
March 31
sunrise 7:15 AM, sunset 7:46 PM

Every day of March: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00053914 (Mckinney Muni AP), public domain. Records: NOAA GHCN-Daily, station USW00053914, 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.