Blackwater weather by month
What a typical year looks like in Blackwater, Arizona: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at CASA GRANDE, 21 km from Blackwater; records cover 1903–2026.
The year at a glance
- Precipitation a year
- 7.9 in201 mm
- Snow a year
- Rare
- Last spring freeze
- Feb 6
- First fall freeze
- Nov 28
- Heating degree days
- 1,238
- Cooling degree days
- 3,962
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 28°−2° (heating, 99%) and 114°46° (cooling, 1%).
Month by month
Blackwater in January
Highs average 69°20° and lows 39°4°, with 0.79 in20 mm of precipitation in a typical January.
- Record high
- 88°31° (1940)
- Record low
- 17°−8° (1932)
- Heating degree days
- 345
- Cooling degree days
- 1
Blackwater in February
Highs average 73°23° and lows 42°5°, with 1 in25 mm of precipitation in a typical February.
- Record high
- 97°36° (1986)
- Record low
- 17°−8° (1955)
- Heating degree days
- 228
- Cooling degree days
- 6
Blackwater in March
Highs average 80°27° and lows 47°8°, with 0.76 in19 mm of precipitation in a typical March.
- Record high
- 104°40° (2026)
- Record low
- 19°−7° (1985)
- Heating degree days
- 105
- Cooling degree days
- 60
Blackwater in April
Highs average 88°31° and lows 53°12°, with 0.21 in5.3 mm of precipitation in a typical April.
- Record high
- 110°43° (1910)
- Record low
- 28°−2° (1906)
- Heating degree days
- 23
- Cooling degree days
- 181
Blackwater in May
Highs average 96°36° and lows 60°16°, with 0.18 in4.6 mm of precipitation in a typical May.
- Record high
- 120°49° (1910)
- Record low
- 36°2° (1975)
- Heating degree days
- 2
- Cooling degree days
- 418
Blackwater in June
Highs average 106°41° and lows 70°21°, with 0.18 in4.6 mm of precipitation in a typical June.
- Record high
- 119°48° (1907)
- Record low
- 40°4° (1907)
- Heating degree days
- 0
- Cooling degree days
- 685
Blackwater in July
Highs average 107°42° and lows 78°26°, with 0.91 in23 mm of precipitation in a typical July.
- Record high
- 122°50° (1905)
- Record low
- 52°11° (1912)
- Heating degree days
- 0
- Cooling degree days
- 851
Blackwater in August
Highs average 105°41° and lows 77°25°, with 1.5 in39 mm of precipitation in a typical August.
- Record high
- 120°49° (1907)
- Record low
- 57°14° (1908)
- Heating degree days
- 0
- Cooling degree days
- 815
Blackwater in September
Highs average 100°38° and lows 71°22°, with 0.72 in18 mm of precipitation in a typical September.
- Record high
- 116°47° (1950)
- Record low
- 40°4° (1908)
- Heating degree days
- 0
- Cooling degree days
- 616
Blackwater in OctoberThis month
Highs average 91°33° and lows 57°14°, with 0.48 in12 mm of precipitation in a typical October.
- Record high
- 110°43° (2024)
- Record low
- 27°−3° (1906)
- Heating degree days
- 12
- Cooling degree days
- 285
Blackwater in November
Highs average 78°25° and lows 45°7°, with 0.43 in11 mm of precipitation in a typical November.
- Record high
- 97°36° (2020)
- Record low
- 22°−6° (1938)
- Heating degree days
- 151
- Cooling degree days
- 43
Blackwater in December
Highs average 68°20° and lows 38°4°, with 0.73 in19 mm of precipitation in a typical December.
- Record high
- 91°33° (1907)
- Record low
- 15°−9° (1954)
- Heating degree days
- 372
- Cooling degree days
- 1