What is the hottest month in McKinney?

August — average highs around 94° with lows near 77°.

What is the coldest month in McKinney?

January, when nights typically drop to 37° and days top out near 54°.

What is the rainiest month in McKinney?

May, averaging about 8.6 in of precipitation; the driest is July at roughly 2.8 in.

How warm is McKinney over the year?

The annual mean is 67°, with about 57 in of precipitation in a typical year (1991-2020 normals).

McKinney Climate — Monthly Normals 1991-2020

Climate in McKinney

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

Annual mean temp

19.3°C

average across 12 months

Annual precipitation

1450 mm

yearly total

Warmest month

Aug

⌀ max 34°C

Coldest month

Jan

⌀ min 2°C

Temperatures by month

typical high (orange) · typical low (blue)

Jan

37° … 54°

Feb

40° … 58°

Mar

50° … 69°

Apr

56° … 74°

May

65° … 82°

Jun

73° … 90°

Jul

77° … 94°

Aug

77° … 94°

Sep

71° … 88°

Oct

60° … 78°

Nov

48° … 66°

Dec

43° … 60°

Precipitation by month

monthly totals across the year

Jan

83 mm

Feb

106 mm

Mar

147 mm

Apr

138 mm

May

219 mm

Jun

124 mm

Jul

71 mm

Aug

88 mm

Sep

125 mm

Oct

171 mm

Nov

96 mm

Dec

82 mm

The short version

RegionTexas

Latitude33.1976°N

Annual mean19.3°C

Annual precipitation1450 mm

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Source · 1991-2020 normals

McKinney, TX Climate