Franklin weather by month
What a typical year looks like in Franklin, Iowa: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Fort Madison, 16 km from Franklin; records cover 1893–2026.
The year at a glance
- Precipitation a year
- 39.4 in1000 mm
- Snow a year
- 18 in46 cm
- Last spring freeze
- Apr 10
- First fall freeze
- Oct 22
- Heating degree days
- 5,731
- Cooling degree days
- 1,118
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −2°−19° (heating, 99%) and 95°35° (cooling, 1%).
Month by month
Franklin in January
Highs average 33°0° and lows 17°−8°, with 1.7 in43 mm of precipitation and 6 in15 cm of snow in a typical January.
- Record high
- 67°19° (1957)
- Record low
- −23°−31° (1982)
- Heating degree days
- 1244
- Cooling degree days
- 0
Franklin in February
Highs average 38°3° and lows 21°−6°, with 1.9 in49 mm of precipitation and 5 in12 cm of snow in a typical February.
- Record high
- 73°23° (2026)
- Record low
- −21°−29° (1975)
- Heating degree days
- 1002
- Cooling degree days
- 0
Franklin in March
Highs average 50°10° and lows 32°0°, with 2.7 in69 mm of precipitation and 1.7 in4.3 cm of snow in a typical March.
- Record high
- 88°31° (2026)
- Record low
- −11°−24° (1962)
- Heating degree days
- 753
- Cooling degree days
- 1
Franklin in April
Highs average 62°17° and lows 43°6°, with 4 in101 mm of precipitation and 0.5 in1.3 cm of snow in a typical April.
- Record high
- 93°34° (1895)
- Record low
- 11°−12° (1982)
- Heating degree days
- 387
- Cooling degree days
- 7
Franklin in May
Highs average 72°22° and lows 54°12°, with 5.1 in130 mm of precipitation in a typical May.
- Record high
- 95°35° (1895)
- Record low
- 22°−6° (1966)
- Heating degree days
- 134
- Cooling degree days
- 73
Franklin in June
Highs average 82°28° and lows 63°17°, with 5.2 in131 mm of precipitation in a typical June.
- Record high
- 104°40° (1988)
- Record low
- 41°5° (1956)
- Heating degree days
- 12
- Cooling degree days
- 235
Franklin in July
Highs average 85°30° and lows 68°20°, with 4.1 in103 mm of precipitation in a typical July.
- Record high
- 107°42° (1916)
- Record low
- 47°8° (1971)
- Heating degree days
- 1
- Cooling degree days
- 352
Franklin in August
Highs average 84°29° and lows 66°19°, with 3.8 in97 mm of precipitation in a typical August.
- Record high
- 104°40° (1983)
- Record low
- 42°6° (1977)
- Heating degree days
- 2
- Cooling degree days
- 303
Franklin in September
Highs average 77°25° and lows 57°14°, with 3.5 in89 mm of precipitation in a typical September.
- Record high
- 100°38° (2000)
- Record low
- 31°−1° (1899)
- Heating degree days
- 67
- Cooling degree days
- 131
Franklin in OctoberThis month
Highs average 64°18° and lows 45°7°, with 3.1 in78 mm of precipitation and 0.1 in0.3 cm of snow in a typical October.
- Record high
- 92°33° (1953)
- Record low
- 15°−9° (1972)
- Heating degree days
- 336
- Cooling degree days
- 16
Franklin in November
Highs average 50°10° and lows 33°0°, with 2.4 in62 mm of precipitation and 0.8 in2 cm of snow in a typical November.
- Record high
- 81°27° (1968)
- Record low
- −5°−21° (1964)
- Heating degree days
- 713
- Cooling degree days
- 0
Franklin in December
Highs average 38°3° and lows 23°−5°, with 1.9 in49 mm of precipitation and 4 in11 cm of snow in a typical December.
- Record high
- 70°21° (1970)
- Record low
- −19°−28° (1983)
- Heating degree days
- 1080
- Cooling degree days
- 0