Window Rock weather by month
What a typical year looks like in Window Rock, Arizona: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Window Rock Airport, 2 km from Window Rock; records cover 1998–2026.
The year at a glance
- Precipitation a year
- 11.4 in288 mm
- Snow a year
- Rare
- Last spring freeze
- May 31
- First fall freeze
- Sep 23
- Heating degree days
- 6,157
- Cooling degree days
- 413
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −4°−20° (heating, 99%) and 94°34° (cooling, 1%).
Month by month
Window Rock in January
Highs average 45°7° and lows 14°−10°, with 1 in26 mm of precipitation in a typical January.
- Record high
- 63°17° (2000)
- Record low
- −25°−32° (2011)
- Heating degree days
- 1090
- Cooling degree days
- 0
Window Rock in February
Highs average 49°10° and lows 19°−7°, with 0.87 in22 mm of precipitation in a typical February.
- Record high
- 70°21° (2016)
- Record low
- −23°−31° (2011)
- Heating degree days
- 862
- Cooling degree days
- 0
Window Rock in March
Highs average 58°14° and lows 24°−5°, with 0.66 in17 mm of precipitation in a typical March.
- Record high
- 84°29° (2026)
- Record low
- −8°−22° (2002)
- Heating degree days
- 755
- Cooling degree days
- 0
Window Rock in April
Highs average 65°18° and lows 29°−2°, with 0.46 in12 mm of precipitation in a typical April.
- Record high
- 83°28° (2020)
- Record low
- 7°−14° (2025)
- Heating degree days
- 546
- Cooling degree days
- 0
Window Rock in May
Highs average 74°23° and lows 36°2°, with 0.57 in14 mm of precipitation in a typical May.
- Record high
- 92°33° (2002)
- Record low
- 13°−11° (2008)
- Heating degree days
- 309
- Cooling degree days
- 4
Window Rock in June
Highs average 85°30° and lows 45°7°, with 0.28 in7.1 mm of precipitation in a typical June.
- Record high
- 101°38° (2021)
- Record low
- 26°−3° (2020)
- Heating degree days
- 63
- Cooling degree days
- 69
Window Rock in July
Highs average 88°31° and lows 55°13°, with 1.8 in45 mm of precipitation in a typical July.
- Record high
- 99°37° (2023)
- Record low
- 35°2° (2026)
- Heating degree days
- 1
- Cooling degree days
- 204
Window Rock in August
Highs average 85°29° and lows 52°11°, with 1.9 in47 mm of precipitation in a typical August.
- Record high
- 97°36° (2020)
- Record low
- 35°2° (2002)
- Heating degree days
- 11
- Cooling degree days
- 120
Window Rock in September
Highs average 79°26° and lows 43°6°, with 1.3 in34 mm of precipitation in a typical September.
- Record high
- 96°36° (2020)
- Record low
- 22°−6° (1999)
- Heating degree days
- 142
- Cooling degree days
- 16
Window Rock in OctoberThis month
Highs average 68°20° and lows 31°−1°, with 0.92 in23 mm of precipitation in a typical October.
- Record high
- 86°30° (2015)
- Record low
- 1°−17° (2019)
- Heating degree days
- 490
- Cooling degree days
- 0
Window Rock in November
Highs average 56°13° and lows 21°−6°, with 0.75 in19 mm of precipitation in a typical November.
- Record high
- 81°27° (2000)
- Record low
- −5°−21° (2004)
- Heating degree days
- 794
- Cooling degree days
- 0
Window Rock in December
Highs average 46°8° and lows 14°−10°, with 0.83 in21 mm of precipitation in a typical December.
- Record high
- 66°19° (2003)
- Record low
- −17°−27° (2010)
- Heating degree days
- 1094
- Cooling degree days
- 0