Ireton weather by month
What a typical year looks like in Ireton, Iowa: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at LE MARS, 25 km from Ireton; records cover 1896–2026.
The year at a glance
- Precipitation a year
- 30 in762 mm
- Snow a year
- 31 in78 cm
- Last spring freeze
- Apr 28
- First fall freeze
- Oct 4
- Heating degree days
- 7,312
- Cooling degree days
- 758
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −13°−25° (heating, 99%) and 94°34° (cooling, 1%).
Month by month
Ireton in January
Highs average 27°−3° and lows 7°−14°, with 0.72 in18 mm of precipitation and 8 in20 cm of snow in a typical January.
- Record high
- 68°20° (2002)
- Record low
- −37°−38° (1912)
- Heating degree days
- 1478
- Cooling degree days
- 0
Ireton in February
Highs average 32°0° and lows 11°−11°, with 0.87 in22 mm of precipitation and 8 in19 cm of snow in a typical February.
- Record high
- 73°23° (2024)
- Record low
- −35°−37° (1899)
- Heating degree days
- 1210
- Cooling degree days
- 0
Ireton in March
Highs average 46°8° and lows 23°−5°, with 1.9 in47 mm of precipitation and 5 in12 cm of snow in a typical March.
- Record high
- 93°34° (2026)
- Record low
- −26°−32° (1960)
- Heating degree days
- 946
- Cooling degree days
- 1
Ireton in April
Highs average 60°16° and lows 34°1°, with 3.1 in78 mm of precipitation and 1.9 in4.8 cm of snow in a typical April.
- Record high
- 96°36° (1980)
- Record low
- −2°−19° (1975)
- Heating degree days
- 543
- Cooling degree days
- 5
Ireton in May
Highs average 72°22° and lows 47°8°, with 3.9 in99 mm of precipitation and 0.1 in0.3 cm of snow in a typical May.
- Record high
- 108°42° (1934)
- Record low
- 17°−8° (1907)
- Heating degree days
- 225
- Cooling degree days
- 50
Ireton in June
Highs average 81°27° and lows 58°15°, with 4.6 in118 mm of precipitation in a typical June.
- Record high
- 106°41° (1933)
- Record low
- 33°1° (1969)
- Heating degree days
- 32
- Cooling degree days
- 176
Ireton in July
Highs average 85°29° and lows 62°17°, with 3.1 in79 mm of precipitation in a typical July.
- Record high
- 111°44° (1936)
- Record low
- 38°3° (1972)
- Heating degree days
- 6
- Cooling degree days
- 257
Ireton in August
Highs average 82°28° and lows 59°15°, with 4 in100 mm of precipitation in a typical August.
- Record high
- 108°42° (1930)
- Record low
- 35°2° (1915)
- Heating degree days
- 17
- Cooling degree days
- 188
Ireton in September
Highs average 76°24° and lows 50°10°, with 3.1 in80 mm of precipitation in a typical September.
- Record high
- 103°39° (1976)
- Record low
- 22°−6° (1913)
- Heating degree days
- 142
- Cooling degree days
- 73
Ireton in OctoberThis month
Highs average 63°17° and lows 37°3°, with 2.4 in61 mm of precipitation and 0.4 in1 cm of snow in a typical October.
- Record high
- 97°36° (2000)
- Record low
- −7°−22° (1925)
- Heating degree days
- 482
- Cooling degree days
- 8
Ireton in November
Highs average 46°8° and lows 24°−5°, with 1.3 in33 mm of precipitation and 2.6 in6.6 cm of snow in a typical November.
- Record high
- 80°27° (1999)
- Record low
- −24°−31° (1959)
- Heating degree days
- 912
- Cooling degree days
- 0
Ireton in December
Highs average 32°0° and lows 13°−11°, with 1 in26 mm of precipitation and 6 in15 cm of snow in a typical December.
- Record high
- 68°20° (1921)
- Record low
- −33°−36° (1917)
- Heating degree days
- 1319
- Cooling degree days
- 0