Stockton weather by month
What a typical year looks like in Stockton, Iowa: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Illinois City Dam 16, 22 km from Stockton; records cover 1943–2026.
The year at a glance
- Precipitation a year
- 36.4 in926 mm
- Snow a year
- Rare
- Last spring freeze
- Apr 16
- First fall freeze
- Oct 22
- Heating degree days
- 6,221
- Cooling degree days
- 951
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −7°−22° (heating, 99%) and 95°35° (cooling, 1%).
Month by month
Stockton in January
Highs average 31°−1° and lows 13°−10°, with 1.2 in30 mm of precipitation in a typical January.
- Record high
- 64°18° (1944)
- Record low
- −26°−32° (2009)
- Heating degree days
- 1332
- Cooling degree days
- 0
Stockton in February
Highs average 35°2° and lows 17°−8°, with 1.6 in39 mm of precipitation in a typical February.
- Record high
- 75°24° (2024)
- Record low
- −26°−32° (2019)
- Heating degree days
- 1082
- Cooling degree days
- 0
Stockton in March
Highs average 48°9° and lows 30°−1°, with 2.3 in58 mm of precipitation in a typical March.
- Record high
- 87°31° (1945)
- Record low
- −12°−24° (2015)
- Heating degree days
- 814
- Cooling degree days
- 2
Stockton in April
Highs average 61°16° and lows 39°4°, with 3.5 in88 mm of precipitation in a typical April.
- Record high
- 89°32° (2007)
- Record low
- 16°−9° (2018)
- Heating degree days
- 451
- Cooling degree days
- 4
Stockton in May
Highs average 72°22° and lows 51°11°, with 4.8 in122 mm of precipitation in a typical May.
- Record high
- 97°36° (2018)
- Record low
- 23°−5° (2011)
- Heating degree days
- 165
- Cooling degree days
- 62
Stockton in June
Highs average 81°27° and lows 62°16°, with 5 in127 mm of precipitation in a typical June.
- Record high
- 98°37° (2012)
- Record low
- 40°4° (1945)
- Heating degree days
- 14
- Cooling degree days
- 205
Stockton in July
Highs average 85°29° and lows 65°18°, with 4 in102 mm of precipitation in a typical July.
- Record high
- 101°38° (2012)
- Record low
- 49°9° (1945)
- Heating degree days
- 3
- Cooling degree days
- 308
Stockton in August
Highs average 83°28° and lows 63°17°, with 3.9 in100 mm of precipitation in a typical August.
- Record high
- 102°39° (1947)
- Record low
- 41°5° (2025)
- Heating degree days
- 6
- Cooling degree days
- 254
Stockton in September
Highs average 77°25° and lows 55°13°, with 3.6 in91 mm of precipitation in a typical September.
- Record high
- 99°37° (2013)
- Record low
- 34°1° (2012)
- Heating degree days
- 80
- Cooling degree days
- 101
Stockton in OctoberThis month
Highs average 64°18° and lows 43°6°, with 2.8 in71 mm of precipitation in a typical October.
- Record high
- 95°35° (2006)
- Record low
- 24°−4° (2013)
- Heating degree days
- 370
- Cooling degree days
- 15
Stockton in November
Highs average 49°9° and lows 31°−1°, with 2.1 in54 mm of precipitation in a typical November.
- Record high
- 79°26° (1944)
- Record low
- 5°−15° (1947)
- Heating degree days
- 762
- Cooling degree days
- 0
Stockton in December
Highs average 36°2° and lows 20°−7°, with 1.7 in43 mm of precipitation in a typical December.
- Record high
- 73°23° (2021)
- Record low
- −12°−24° (2013)
- Heating degree days
- 1142
- Cooling degree days
- 0