What is the hottest month in Plano?

August — average highs around 95° with lows near 77°.

What is the coldest month in Plano?

January, when nights typically drop to 37° and days top out near 55°.

What is the rainiest month in Plano?

May, averaging about 8.5 in of precipitation; the driest is July at roughly 3.1 in.

How warm is Plano over the year?

The annual mean is 67°, with about 59 in of precipitation in a typical year (1991-2020 normals).

Plano Climate — Monthly Normals 1991-2020

Climate in Plano

The typical year in Plano (Texas), from 1991-2020 normals. For what's happening now, see the current forecast; a month ahead — the 30-day outlook.

Annual mean temp

19.6°C

average across 12 months

Annual precipitation

1498 mm

yearly total

Warmest month

Aug

⌀ max 35°C

Coldest month

Jan

⌀ min 2°C

Temperatures by month

typical high (orange) · typical low (blue)

Jan

3° … 13°

Feb

5° … 15°

Mar

10° … 21°

Apr

13° … 24°

May

19° … 28°

Jun

23° … 32°

Jul

25° … 35°

Aug

25° … 35°

Sep

22° … 31°

Oct

16° … 26°

Nov

9° … 19°

Dec

7° … 16°

Precipitation by month

monthly totals across the year

Jan

85 mm

Feb

106 mm

Mar

134 mm

Apr

167 mm

May

217 mm

Jun

130 mm

Jul

79 mm

Aug

101 mm

Sep

137 mm

Oct

163 mm

Nov

95 mm

Dec

84 mm

The short version

RegionTexas

Latitude33.0198°N

Annual mean19.6°C

Annual precipitation1498 mm

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Weather map — Plano

Plano →

Source · 1991-2020 normals

Plano, TX Climate