Luther weather by month
What a typical year looks like in Luther, Iowa: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at BOONE, 10 km from Luther; records cover 1904–2026.
The year at a glance
- Precipitation a year
- 39.1 in994 mm
- Snow a year
- 36 in91 cm
- Last spring freeze
- May 1
- First fall freeze
- Oct 7
- Heating degree days
- 6,922
- Cooling degree days
- 799
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −12°−24° (heating, 99%) and 94°34° (cooling, 1%).
Month by month
Luther in January
Highs average 28°−2° and lows 9°−13°, with 1.2 in30 mm of precipitation and 10 in25 cm of snow in a typical January.
- Record high
- 68°20° (2002)
- Record low
- −35°−37° (1912)
- Heating degree days
- 1437
- Cooling degree days
- 0
Luther in February
Highs average 33°1° and lows 13°−10°, with 1.4 in36 mm of precipitation and 9 in24 cm of snow in a typical February.
- Record high
- 77°25° (1930)
- Record low
- −35°−37° (1996)
- Heating degree days
- 1168
- Cooling degree days
- 0
Luther in March
Highs average 46°8° and lows 26°−4°, with 2.3 in57 mm of precipitation and 5 in13 cm of snow in a typical March.
- Record high
- 91°33° (2026)
- Record low
- −22°−30° (1923)
- Heating degree days
- 901
- Cooling degree days
- 1
Luther in April
Highs average 60°16° and lows 37°3°, with 4.1 in103 mm of precipitation and 1.3 in3.3 cm of snow in a typical April.
- Record high
- 95°35° (1980)
- Record low
- −1°−18° (1982)
- Heating degree days
- 505
- Cooling degree days
- 5
Luther in May
Highs average 71°22° and lows 49°9°, with 5.2 in131 mm of precipitation in a typical May.
- Record high
- 110°43° (1934)
- Record low
- 21°−6° (1907)
- Heating degree days
- 209
- Cooling degree days
- 46
Luther in June
Highs average 81°27° and lows 59°15°, with 5.4 in137 mm of precipitation in a typical June.
- Record high
- 106°41° (1934)
- Record low
- 35°2° (1983)
- Heating degree days
- 30
- Cooling degree days
- 169
Luther in July
Highs average 84°29° and lows 63°17°, with 4.8 in122 mm of precipitation in a typical July.
- Record high
- 111°44° (1936)
- Record low
- 40°4° (1932)
- Heating degree days
- 5
- Cooling degree days
- 267
Luther in August
Highs average 82°28° and lows 61°16°, with 4.9 in125 mm of precipitation in a typical August.
- Record high
- 111°44° (1934)
- Record low
- 35°2° (1915)
- Heating degree days
- 12
- Cooling degree days
- 213
Luther in September
Highs average 76°24° and lows 52°11°, with 3.3 in84 mm of precipitation in a typical September.
- Record high
- 103°39° (1913)
- Record low
- 23°−5° (1983)
- Heating degree days
- 120
- Cooling degree days
- 87
Luther in OctoberThis month
Highs average 63°17° and lows 39°4°, with 3 in75 mm of precipitation and 0.6 in1.5 cm of snow in a typical October.
- Record high
- 95°35° (1963)
- Record low
- −6°−21° (1925)
- Heating degree days
- 445
- Cooling degree days
- 11
Luther in November
Highs average 47°8° and lows 27°−3°, with 2.1 in53 mm of precipitation and 1.9 in4.8 cm of snow in a typical November.
- Record high
- 82°28° (1938)
- Record low
- −11°−24° (1977)
- Heating degree days
- 844
- Cooling degree days
- 0
Luther in December
Highs average 34°1° and lows 16°−9°, with 1.6 in40 mm of precipitation and 8 in20 cm of snow in a typical December.
- Record high
- 72°22° (1939)
- Record low
- −25°−32° (1924)
- Heating degree days
- 1246
- Cooling degree days
- 0