Climateby Month

Plano, TX climate by month

NOAA 1991-2020 normals · 668 ft elevation · also covers Garland, Richardson, Allen

Summers in Plano are hot and humid; winters are cool. Highs peak at 97°F in August and fall to 58°F in January. Wet days are spread through the year, from about 5 to 10 a month. Normal snowfall is about 2.6 in a year. The most comfortable time to visit is March and April.

Warmest month
97°F
August normal high
Coldest month
38°F
January normal low
Wet days a year
87
41.9 in of precipitation
Snow a year
2.6 in
normal snowfall

How warm is Plano?

Normal highs range from 58°F in January to 97°F in August.

20°40°60°80°100° January: normal high 58°F (14°C), low 38°F (3°C) 58° 38° February: normal high 62°F (17°C), low 42°F (6°C) March: normal high 70°F (21°C), low 49°F (9°C) April: normal high 77°F (25°C), low 57°F (14°C) May: normal high 85°F (29°C), low 66°F (19°C) June: normal high 93°F (34°C), low 74°F (23°C) July: normal high 97°F (36°C), low 78°F (26°C) 97° 78° August: normal high 97°F (36°C), low 77°F (25°C) September: normal high 90°F (32°C), low 70°F (21°C) October: normal high 80°F (27°C), low 59°F (15°C) November: normal high 68°F (20°C), low 48°F (9°C) December: normal high 59°F (15°C), low 40°F (4°C) JFMAMJJASOND

Bars run from the normal low to the normal high for each month.

How rainy is Plano?

May has the most wet days (about 10); the year brings about 42 in of precipitation.

January: 8 wet days February: 8 wet days March: 9 wet days April: 8 wet days May: 10 wet days 10 June: 7 wet days July: 5 wet days 5 August: 5 wet days September: 6 wet days October: 8 wet days November: 7 wet days December: 8 wet days JFMAMJJASOND

Wet day: at least 0.01 in of rain or melted snow, counted from daily records 1991-2020.

How much does it snow?

Normal snowfall is 2.6 in a year, most of it in February.

January: 0.2 in of snow February: 1.3 in of snow 1.3 March: 0.4 in of snow April: 0.0 in of snow 0.0 May: 0.0 in of snow June: 0.0 in of snow July: 0.0 in of snow August: 0.0 in of snow September: 0.0 in of snow October: 0.0 in of snow November: 0.1 in of snow December: 0.6 in of snow JFMAMJJASOND

How humid is Plano?

Muggy days peak in July, at about 27 days.

January: 0 muggy days 0 February: 0 muggy days March: 0 muggy days April: 3 muggy days May: 13 muggy days June: 24 muggy days July: 27 muggy days 27 August: 24 muggy days September: 14 muggy days October: 5 muggy days November: 1 muggy days December: 0 muggy days JFMAMJJASOND

Muggy day: daily mean dew point of 65°F or higher, from hourly observations 1991-2020 at Dallas/Ft Worth International Airport, 21 mi WSW of the city center (the nearest airport with complete hourly records).

How much daylight?

Daylight ranges from about 10.0 hours in December to 14.3 hours in June.

January: 10.3 hours of daylight February: 11.0 hours of daylight March: 12.0 hours of daylight April: 13.0 hours of daylight May: 13.9 hours of daylight June: 14.3 hours of daylight 14.3 July: 14.1 hours of daylight August: 13.3 hours of daylight September: 12.4 hours of daylight October: 11.3 hours of daylight November: 10.5 hours of daylight December: 10.0 hours of daylight 10.0 JFMAMJJASOND
See all numbers
Monthly climate normals and day counts for Plano, 1991-2020
MonthHighLowPrecip.Wet daysSnowMuggy daysDaylight
January 58°F38°F 2.8 in8 0.2 in 0 10.3 h
February 62°F42°F 3.4 in8 1.3 in 0 11.0 h
March 70°F49°F 3.6 in9 0.4 in 0 12.0 h
April 77°F57°F 3.5 in8 0.0 in 3 13.0 h
May 85°F66°F 5.2 in10 0.0 in 13 13.9 h
June 93°F74°F 3.8 in7 0.0 in 24 14.3 h
July 97°F78°F 2.2 in5 0.0 in 27 14.1 h
August 97°F77°F 2.5 in5 0.0 in 24 13.3 h
September 90°F70°F 3.3 in6 0.0 in 14 12.4 h
October 80°F59°F 5.3 in8 0.0 in 5 11.3 h
November 68°F48°F 3.0 in7 0.1 in 1 10.5 h
December 59°F40°F 3.4 in8 0.6 in 0 10.0 h

High and low: NOAA 1991-2020 normal daily high and low. Wet days: at least 0.01 in of rain or melted snow. Muggy days: daily mean dew point 65°F or higher.

Best months to visit Plano

By our comfort score, the best months are March and April.

Comfort score by month (0-100) and its parts, in days per month
MonthScoreComfortableNotable rainHot or cold
Jan 54953
Feb 601152
Mar 691660
Apr 691451
May 52478
Jun 390522
Jul 360429
Aug 350428
Sep 422417
Oct 581164
Nov 651540
Dec 55941

Score = 40 × share of comfortable days + 25 × share of days without notable rain + 20 × share of days neither hot (90°F+) nor cold (high 40°F or below) + 15 × daylight. How the score works.

Frost dates in Plano

The last spring frost typically comes around Mar 7, and the first fall frost around Nov 21, leaving 259 frost-free days in a typical year.

Frost and freeze dates for Plano
Typical date1 year in 10
Last spring frost (32°F)Mar 7after Mar 29
First fall frost (32°F)Nov 21before Nov 2
Last hard freeze (28°F)Feb 24after Mar 12
First hard freeze (28°F)Dec 4before Nov 14
Frost-free season259 daysunder 232 days

"Typical" is the date with a 50% chance of a later spring frost (or earlier fall frost). Planting after the "1 year in 10" spring date gives a 90% chance of no further frost. The Old Farmer's Almanac publishes 30% dates, which fall between our typical and 1-in-10 dates.

Station: Richardson (USC00417588), NOAA 1991-2020 freeze probabilities. Frost dates for every city in Texas.

Hottest and coldest readings, 1991-2020

The highest reading was 112°F (July 22, 2018); the lowest was 11°F (February 4, 1996).

From the temperature station's daily records with NOAA quality flags removed. Not an all-time record.

Near Plano

Similar climates elsewhere

Also covers

Garland, Richardson and Allen use the same temperature and rain stations as Plano, so their monthly numbers are the ones on this page.

Where the numbers come from

  • Temperature: Dallas Love Fld (USW00013960), 15 mi SW of the city center, 440 ft (228 ft lower than the city). NOAA normals and daily records, 1991-2020.
  • Rain and frost dates: Richardson (USC00417588), 3.0 mi WSW of the city center, 678 ft . NOAA normals and daily records, 1991-2020.
  • Snowfall and snow depth: Frisco (USC00413370), 13 mi NNW of the city center, 747 ft (79 ft higher than the city). NOAA normals and daily records, 1991-2020.
  • Humidity and wind by hour and cloud cover: Dallas Ft Worth Airport (USW00003927), 20 mi WSW of the city center, 560 ft (108 ft lower than the city). NOAA normals and daily records, 1991-2020.
  • Daily humidity and wind: Dallas/Ft Worth International Airport (722590-03927), 21 mi WSW of the city center, 544 ft (124 ft lower than the city). Hourly observations, 1991-2020.

Distances from the city center (USGS). Methodology · Report an error