Alton weather by month
What a typical year looks like in Alton, Kansas: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Alton 2sw, 3 km from Alton; records cover 1902–2026.
The year at a glance
- Precipitation a year
- 28.6 in726 mm
- Snow a year
- 18 in45 cm
- Last spring freeze
- Apr 30
- First fall freeze
- Oct 7
- Heating degree days
- 5,585
- Cooling degree days
- 1,334
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 105°41° (cooling, 1%).
Month by month
Alton in January
Highs average 42°5° and lows 14°−10°, with 0.67 in17 mm of precipitation and 4 in10 cm of snow in a typical January.
- Record high
- 80°27° (1990)
- Record low
- −25°−32° (1905)
- Heating degree days
- 1147
- Cooling degree days
- 0
Alton in February
Highs average 46°8° and lows 18°−8°, with 0.69 in18 mm of precipitation and 5 in12 cm of snow in a typical February.
- Record high
- 87°31° (1972)
- Record low
- −29°−34° (1905)
- Heating degree days
- 925
- Cooling degree days
- 0
Alton in March
Highs average 57°14° and lows 27°−3°, with 1.6 in39 mm of precipitation and 2 in5.1 cm of snow in a typical March.
- Record high
- 99°37° (1907)
- Record low
- −17°−27° (1960)
- Heating degree days
- 717
- Cooling degree days
- 0
Alton in April
Highs average 67°19° and lows 36°2°, with 2.3 in58 mm of precipitation and 1.2 in3 cm of snow in a typical April.
- Record high
- 106°41° (1989)
- Record low
- 4°−16° (2018)
- Heating degree days
- 416
- Cooling degree days
- 10
Alton in May
Highs average 76°25° and lows 48°9°, with 4.2 in107 mm of precipitation in a typical May.
- Record high
- 105°41° (1939)
- Record low
- 19°−7° (1909)
- Heating degree days
- 156
- Cooling degree days
- 72
Alton in June
Highs average 88°31° and lows 60°15°, with 3.5 in89 mm of precipitation in a typical June.
- Record high
- 115°46° (2012)
- Record low
- 33°1° (1998)
- Heating degree days
- 18
- Cooling degree days
- 274
Alton in July
Highs average 93°34° and lows 65°19°, with 4.9 in125 mm of precipitation in a typical July.
- Record high
- 121°49° (1936)
- Record low
- 41°5° (1990)
- Heating degree days
- 1
- Cooling degree days
- 433
Alton in August
Highs average 91°33° and lows 63°17°, with 3.9 in98 mm of precipitation in a typical August.
- Record high
- 116°47° (1936)
- Record low
- 33°1° (1910)
- Heating degree days
- 4
- Cooling degree days
- 363
Alton in September
Highs average 83°28° and lows 53°12°, with 2.6 in67 mm of precipitation in a typical September.
- Record high
- 112°44° (1947)
- Record low
- 18°−8° (1984)
- Heating degree days
- 70
- Cooling degree days
- 157
Alton in OctoberThis month
Highs average 70°21° and lows 39°4°, with 2.1 in54 mm of precipitation and 0.4 in1 cm of snow in a typical October.
- Record high
- 103°39° (1947)
- Record low
- 6°−14° (1997)
- Heating degree days
- 345
- Cooling degree days
- 24
Alton in November
Highs average 56°13° and lows 26°−3°, with 1.2 in30 mm of precipitation and 2.1 in5.3 cm of snow in a typical November.
- Record high
- 88°31° (1945)
- Record low
- −12°−24° (1929)
- Heating degree days
- 725
- Cooling degree days
- 1
Alton in December
Highs average 44°7° and lows 18°−8°, with 0.93 in24 mm of precipitation and 3 in8 cm of snow in a typical December.
- Record high
- 82°28° (1964)
- Record low
- −31°−35° (1989)
- Heating degree days
- 1061
- Cooling degree days
- 0