Somerton weather by month
What a typical year looks like in Somerton, Arizona: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Yuma International Airport, 12 km from Somerton; records cover 1878–2026.
The year at a glance
- Precipitation a year
- 3.3 in83 mm
- Snow a year
- Rare
- Last spring freeze
- Rare
- First fall freeze
- Rare
- Heating degree days
- 678
- Cooling degree days
- 4,704
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 39°4° (heating, 99%) and 114°46° (cooling, 1%).
Month by month
Somerton in January
Highs average 70°21° and lows 48°9°, with 0.39 in9.9 mm of precipitation in a typical January.
- Record high
- 88°31° (1971)
- Record low
- 22°−6° (1883)
- Heating degree days
- 195
- Cooling degree days
- 5
Somerton in February
Highs average 73°23° and lows 50°10°, with 0.38 in9.7 mm of precipitation in a typical February.
- Record high
- 97°36° (1986)
- Record low
- 25°−4° (1880)
- Heating degree days
- 118
- Cooling degree days
- 32
Somerton in March
Highs average 80°27° and lows 55°13°, with 0.39 in9.9 mm of precipitation in a typical March.
- Record high
- 109°43° (2026)
- Record low
- 31°−1° (1881)
- Heating degree days
- 46
- Cooling degree days
- 126
Somerton in April
Highs average 86°30° and lows 60°15°, with 0.14 in3.6 mm of precipitation in a typical April.
- Record high
- 107°42° (1898)
- Record low
- 38°3° (1901)
- Heating degree days
- 11
- Cooling degree days
- 254
Somerton in May
Highs average 94°35° and lows 67°19°, with 0.06 in1.5 mm of precipitation in a typical May.
- Record high
- 120°49° (1910)
- Record low
- 39°4° (1915)
- Heating degree days
- 1
- Cooling degree days
- 484
Somerton in June
Highs average 103°40° and lows 75°24°, with 0.01 in0.3 mm of precipitation in a typical June.
- Record high
- 122°50° (1990)
- Record low
- 50°10° (1908)
- Heating degree days
- 0
- Cooling degree days
- 724
Somerton in July
Highs average 107°42° and lows 83°28°, with 0.24 in6.1 mm of precipitation in a typical July.
- Record high
- 124°51° (1995)
- Record low
- 61°16° (1879)
- Heating degree days
- 0
- Cooling degree days
- 919
Somerton in August
Highs average 106°41° and lows 83°28°, with 0.2 in5.1 mm of precipitation in a typical August.
- Record high
- 120°49° (1981)
- Record low
- 58°14° (1907)
- Heating degree days
- 0
- Cooling degree days
- 924
Somerton in September
Highs average 101°39° and lows 78°25°, with 0.68 in17 mm of precipitation in a typical September.
- Record high
- 123°51° (1950)
- Record low
- 50°10° (1882)
- Heating degree days
- 0
- Cooling degree days
- 735
Somerton in OctoberThis month
Highs average 90°32° and lows 66°19°, with 0.13 in3.3 mm of precipitation in a typical October.
- Record high
- 113°45° (2024)
- Record low
- 35°2° (1971)
- Heating degree days
- 2
- Cooling degree days
- 404
Somerton in November
Highs average 78°25° and lows 54°12°, with 0.23 in5.8 mm of precipitation in a typical November.
- Record high
- 98°37° (1962)
- Record low
- 29°−2° (1906)
- Heating degree days
- 64
- Cooling degree days
- 95
Somerton in December
Highs average 68°20° and lows 47°8°, with 0.43 in11 mm of precipitation in a typical December.
- Record high
- 86°30° (1958)
- Record low
- 22°−6° (1911)
- Heating degree days
- 241
- Cooling degree days
- 2