Monroe weather by month
What a typical year looks like in Monroe, Michigan: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Dundee, 22 km from Monroe; records cover 2000–2026.
The year at a glance
- Precipitation a year
- 34.8 in883 mm
- Snow a year
- 39 in99 cm
- Last spring freeze
- Apr 27
- First fall freeze
- Oct 17
- Heating degree days
- 6,373
- Cooling degree days
- 731
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 93°34° (cooling, 1%).
Month by month
Monroe in January
Highs average 32°0° and lows 17°−8°, with 2.5 in63 mm of precipitation and 12 in31 cm of snow in a typical January.
- Record high
- 65°18° (2008)
- Record low
- −15°−26° (2009)
- Heating degree days
- 1249
- Cooling degree days
- 0
Monroe in February
Highs average 35°2° and lows 18°−8°, with 2 in50 mm of precipitation and 9 in24 cm of snow in a typical February.
- Record high
- 73°23° (2024)
- Record low
- −15°−26° (2015)
- Heating degree days
- 1071
- Cooling degree days
- 0
Monroe in March
Highs average 45°7° and lows 26°−3°, with 2.5 in62 mm of precipitation and 7 in17 cm of snow in a typical March.
- Record high
- 85°29° (2012)
- Record low
- −5°−21° (2003)
- Heating degree days
- 910
- Cooling degree days
- 1
Monroe in April
Highs average 58°15° and lows 36°2°, with 3.3 in83 mm of precipitation and 1.3 in3.3 cm of snow in a typical April.
- Record high
- 87°31° (2009)
- Record low
- 19°−7° (2018)
- Heating degree days
- 533
- Cooling degree days
- 3
Monroe in May
Highs average 70°21° and lows 48°9°, with 3.8 in97 mm of precipitation in a typical May.
- Record high
- 95°35° (2012)
- Record low
- 27°−3° (2020)
- Heating degree days
- 223
- Cooling degree days
- 38
Monroe in June
Highs average 80°27° and lows 58°15°, with 3.4 in85 mm of precipitation in a typical June.
- Record high
- 100°38° (2012)
- Record low
- 40°4° (2003)
- Heating degree days
- 34
- Cooling degree days
- 156
Monroe in July
Highs average 84°29° and lows 62°17°, with 3 in77 mm of precipitation in a typical July.
- Record high
- 101°38° (2011)
- Record low
- 45°7° (2001)
- Heating degree days
- 4
- Cooling degree days
- 258
Monroe in August
Highs average 82°28° and lows 60°16°, with 3.7 in93 mm of precipitation in a typical August.
- Record high
- 98°37° (2001)
- Record low
- 46°8° (2025)
- Heating degree days
- 10
- Cooling degree days
- 194
Monroe in September
Highs average 75°24° and lows 53°12°, with 2.9 in73 mm of precipitation in a typical September.
- Record high
- 97°36° (2011)
- Record low
- 36°2° (2012)
- Heating degree days
- 104
- Cooling degree days
- 72
Monroe in OctoberThis month
Highs average 63°17° and lows 41°5°, with 2.6 in66 mm of precipitation in a typical October.
- Record high
- 90°32° (2007)
- Record low
- 25°−4° (2008)
- Heating degree days
- 414
- Cooling degree days
- 9
Monroe in November
Highs average 49°9° and lows 32°0°, with 2.9 in73 mm of precipitation and 0.7 in1.8 cm of snow in a typical November.
- Record high
- 80°27° (2020)
- Record low
- 8°−13° (2019)
- Heating degree days
- 744
- Cooling degree days
- 0
Monroe in December
Highs average 37°3° and lows 24°−5°, with 2.4 in61 mm of precipitation and 9 in22 cm of snow in a typical December.
- Record high
- 68°20° (2001)
- Record low
- −7°−22° (2004)
- Heating degree days
- 1077
- Cooling degree days
- 0