Cass City, Michigan climate: Normal weather by month, frost dates and records
Cass City's normal year runs from 13°F January nights to 80°F July afternoons, with 33.0 inches of precipitation and 43 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 7.7°C, January lows of −11°C, July highs of 27°C, 839 mm of precipitation a year.
- NOAA stationCass City (1 mi SSW)
- Station IDUSC00201361
- Location43.59°N 83.18°W
- Elevation698 ft (213 m)
- From the center1 miles
- Population2,484
On October 22, the normal high in Cass City is 56°F and the normal low 37°F, and the chance of measurable rain or snow is 41%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Cass City.
- Jan 29° 13°
- Feb 32° 13°
- Mar 42° 22°
- Apr 55° 32°
- May 68° 43°
- Jun 77° 54°
- Jul 80° 57°
- Aug 79° 56°
- Sep 72° 49°
- Oct 59° 39°
- Nov 45° 29°
- Dec 34° 21°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Cass City each month?
July is the warmest month, with normal highs of 80°F; January the coldest, with normal lows of 13°F. The most precipitation falls in May (3.52 in), the least in February (1.79 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 29°F | 13°F | 20.8°F | 2.02 | 14.4 | 14 | <1 | 29 | 9 h 20 min |
| February | 32°F | 13°F | 22.5°F | 1.79 | 9.3 | 10 | <1 | 26 | 10 h 30 min |
| March | 42°F | 22°F | 32.2°F | 1.99 | 5.0 | 10 | <1 | 26 | 11 h 50 min |
| April | 55°F | 32°F | 43.5°F | 3.50 | 1.6 | 12 | <1 | 17 | 13 h 20 min |
| May | 68°F | 43°F | 55.4°F | 3.52 | 0.0 | 12 | <1 | 2 | 14 h 40 min |
| June | 77°F | 54°F | 65.5°F | 3.27 | 0.0 | 10 | 2 | <1 | 15 h 20 min |
| July | 80°F | 57°F | 68.8°F | 3.24 | 0.0 | 9 | 3 | <1 | 15 h 10 min |
| August | 79°F | 56°F | 67.2°F | 3.12 | 0.0 | 11 | 1 | <1 | 14 h |
| September | 72°F | 49°F | 60.2°F | 3.17 | 0.0 | 10 | 1 | <1 | 12 h 30 min |
| October | 59°F | 39°F | 48.8°F | 2.91 | 0.1 | 12 | <1 | 8 | 11 h 10 min |
| November | 45°F | 29°F | 37.2°F | 2.52 | 3.1 | 13 | <1 | 21 | 9 h 40 min |
| December | 34°F | 21°F | 27.4°F | 2.00 | 9.0 | 13 | <1 | 28 | 9 h |
| Year (annual) | 56°F | 36°F | 45.8°F | 33.05 | 42.5 | 138 | 7 | 158 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | −2°C | −11°C | −6.2°C | 51 mm | 37 cm |
| February | 0°C | −10°C | −5.3°C | 45 mm | 24 cm |
| March | 6°C | −5°C | 0.1°C | 51 mm | 13 cm |
| April | 13°C | 0°C | 6.4°C | 89 mm | 4 cm |
| May | 20°C | 6°C | 13.0°C | 89 mm | 0 cm |
| June | 25°C | 12°C | 18.6°C | 83 mm | 0 cm |
| July | 27°C | 14°C | 20.4°C | 82 mm | 0 cm |
| August | 26°C | 13°C | 19.6°C | 79 mm | 0 cm |
| September | 22°C | 9°C | 15.7°C | 81 mm | 0 cm |
| October | 15°C | 4°C | 9.3°C | 74 mm | 0 cm |
| November | 7°C | −2°C | 2.9°C | 64 mm | 8 cm |
| December | 1°C | −6°C | −2.6°C | 51 mm | 23 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00201361; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
When is the best weather to visit Cass City?
Normal highs sit between 65°F and 85°F in May, June, July, August and September. Of those, July has the fewest days with rain (9).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00201361.
When is the last frost in Cass City?
In Cass City, the last spring frost (32°F) comes after May 7 in half of years and after May 22 in one year in ten; the first autumn frost comes before October 10 in half of years and before September 26 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- May 71 year in 10 after May 22; 9 in 10 after April 25
- First autumn frost, half of years before
- October 101 year in 10 before September 26; 9 in 10 before October 25
NOAA puts the median frost-free season at 152 days, and the season without a hard freeze (28°F) at 176 days.
A hard freeze (28°F) comes after April 28 in half of springs and before October 24 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Cass City in zone 6a in ZIP code 48726, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Cass City's NOAA station is in zone 5b: the coldest night of a typical year reaches −13°F (17 complete years); the map interpolates between stations and terrain, so the station and the ZIP area can differ by half a zone.
Frost dates for every NOAA station in Michigan · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00201361; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get in Cass City?
In a normal year in Cass City, 7 days a year reach 90°F, 158 nights fall to 32°F or colder and 138 days bring measurable precipitation.
- Days at 90°F or more
- 7a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 158a normal year
- Days that stay below freezing
- 54high of 32°F or less
- Days with 0.01 inch of precipitation
- 138a normal year
- Days with 1 inch of snow or more
- 15a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00201361.
How sunny is Cass City?
Over a year 70% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Cass City, 3.7 kWh per square metre a day. July is the sunniest month (80%) and December the cloudiest (53%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 55% | 1.4 |
| February | 60% | 2.3 |
| March | 66% | 3.5 |
| April | 68% | 4.6 |
| May | 70% | 5.5 |
| June | 76% | 6.2 |
| July | 80% | 6.2 |
| August | 78% | 5.3 |
| September | 75% | 4.1 |
| October | 65% | 2.6 |
| November | 61% | 1.6 |
| December | 53% | 1.1 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How much heating and cooling does Cass City need?
A normal year in Cass City brings 7,376 heating degree days, 37% more than the median U.S. place (5,373), and 410 cooling degree days, 55% fewer than the median (908). Eight months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 2,263 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,372 | 0 |
| February | 1,191 | 0 |
| March | 1,019 | 1 |
| April | 645 | 1 |
| May | 320 | 23 |
| June | 79 | 94 |
| July | 24 | 141 |
| August | 41 | 109 |
| September | 180 | 36 |
| October | 508 | 5 |
| November | 834 | 0 |
| December | 1,164 | 0 |
| Year (annual) | 7,376 | 410 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00201361. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
Has Cass City been warmer than normal lately?
2025 averaged 46.2°F, 0.4°F above the 1991-2020 normal of 45.8°F. 5 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 47.9°F | +2.1°F | 32.04 | 36.0 |
| 2022 | 46.0°F | +0.2°F | 26.23 | 41.6 |
| 2023 | 48.1°F | +2.3°F | 35.78 | 37.5 |
| 2024 | 49.6°F | +3.8°F | 34.62 | 33.5 |
| 2025 | 46.2°F | +0.4°F | 31.56 | 42.3 |
Source: observed years: ACIS, station USC00201361. A year counts only with all twelve months complete.
How does Cass City's climate compare?
Cass City is warmer than 53 of the other 139 places with their own NOAA record in Michigan, and wetter than 37. Across the 7,247 U.S. stations with normals, its annual mean of 45.8°F is warmer than 23%.
In the Köppen classification computed from these normals, Cass City is Dfb: continental, no dry season, warm summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Which places near Cass City share this climate record?
3 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Sebewaing, MI1,695 people · 17 mi NW
- Gagetown, MI318 people · 6 mi NW
- Owendale, MI260 people · 11 mi NW
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Cass City's climate
What is the coldest month in Cass City?
January, with a normal high of 29°F and a normal low of 13°F. The warmest is July (80°F by day, 57°F at night).
Does it snow in Cass City?
Yes: 43 inches in a normal year, falling on 29 days with 0.1 inch or more, the most in January (14.4 inches).
What is the rainiest month in Cass City?
May, with 3.52 in of precipitation in a normal year; the driest is February with 1.79 in.
What plant hardiness zone is Cass City in?
The USDA's 2023 map puts Cass City in zone 6a in ZIP code 48726, the nearest ZIP area. By the same method at Cass City's NOAA station, the coldest night of a typical year reaches −13°F (17 years, 1991-2020): zone 5b.
How late can frost come in Cass City?
In half of years the last 32°F night comes after May 7; in one year in ten it comes after May 22. Waiting until May 22 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Michigan climateThe statewide normals and every place in the state
- Caro, MI12 miles from this station, 46.8°F a year
- Bad Axe, MI18 miles from this station, 46.4°F a year
- Sandusky, MI22 miles from this station, 46.4°F a year
- Filion (5 mi NNW), MI23 miles from this station, 45.3°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made