Williams weather by month
What a typical year looks like in Williams, Arizona: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Williams, 1 km from Williams; records cover 1897–2026.
The year at a glance
- Precipitation a year
- 21.6 in549 mm
- Snow a year
- 65 in165 cm
- Last spring freeze
- May 22
- First fall freeze
- Oct 6
- Heating degree days
- 5,671
- Cooling degree days
- 296
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 8°−13° (heating, 99%) and 91°33° (cooling, 1%).
Month by month
Williams in January
Highs average 47°8° and lows 21°−6°, with 2.2 in55 mm of precipitation and 17 in43 cm of snow in a typical January.
- Record high
- 74°23° (1976)
- Record low
- −25°−32° (1937)
- Heating degree days
- 952
- Cooling degree days
- 0
Williams in February
Highs average 49°10° and lows 23°−5°, with 2.6 in66 mm of precipitation and 12 in31 cm of snow in a typical February.
- Record high
- 74°23° (1976)
- Record low
- −18°−28° (1899)
- Heating degree days
- 813
- Cooling degree days
- 0
Williams in March
Highs average 56°13° and lows 27°−3°, with 2 in51 mm of precipitation and 11 in28 cm of snow in a typical March.
- Record high
- 85°29° (2026)
- Record low
- −6°−21° (1932)
- Heating degree days
- 738
- Cooling degree days
- 0
Williams in April
Highs average 62°17° and lows 31°0°, with 0.87 in22 mm of precipitation and 6 in14 cm of snow in a typical April.
- Record high
- 87°31° (1910)
- Record low
- 2°−17° (1912)
- Heating degree days
- 546
- Cooling degree days
- 0
Williams in May
Highs average 71°22° and lows 39°4°, with 0.76 in19 mm of precipitation and 0.1 in0.3 cm of snow in a typical May.
- Record high
- 92°33° (1910)
- Record low
- 8°−13° (1933)
- Heating degree days
- 312
- Cooling degree days
- 6
Williams in June
Highs average 82°28° and lows 48°9°, with 0.38 in9.7 mm of precipitation in a typical June.
- Record high
- 100°38° (1970)
- Record low
- 22°−6° (1908)
- Heating degree days
- 69
- Cooling degree days
- 64
Williams in July
Highs average 84°29° and lows 54°12°, with 3 in76 mm of precipitation in a typical July.
- Record high
- 102°39° (1909)
- Record low
- 32°0° (1912)
- Heating degree days
- 9
- Cooling degree days
- 128
Williams in August
Highs average 82°28° and lows 52°11°, with 3.4 in86 mm of precipitation in a typical August.
- Record high
- 101°38° (1902)
- Record low
- 32°0° (1920)
- Heating degree days
- 22
- Cooling degree days
- 80
Williams in September
Highs average 76°25° and lows 47°8°, with 1.6 in40 mm of precipitation in a typical September.
- Record high
- 93°34° (1929)
- Record low
- 11°−12° (1934)
- Heating degree days
- 123
- Cooling degree days
- 18
Williams in OctoberThis month
Highs average 67°19° and lows 36°2°, with 1.6 in40 mm of precipitation and 0.7 in1.8 cm of snow in a typical October.
- Record high
- 86°30° (2020)
- Record low
- 7°−14° (1929)
- Heating degree days
- 423
- Cooling degree days
- 0
Williams in November
Highs average 56°13° and lows 28°−2°, with 1.3 in34 mm of precipitation and 5 in12 cm of snow in a typical November.
- Record high
- 80°27° (1903)
- Record low
- −7°−22° (1931)
- Heating degree days
- 700
- Cooling degree days
- 0
Williams in December
Highs average 47°8° and lows 21°−6°, with 1.9 in49 mm of precipitation and 14 in34 cm of snow in a typical December.
- Record high
- 74°23° (1980)
- Record low
- −17°−27° (1931)
- Heating degree days
- 964
- Cooling degree days
- 0