Whitmore Lake, Michigan climate: Normal weather by month, frost dates and records
Whitmore Lake's normal year runs from 15°F January nights to 82°F July afternoons, with 34.5 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 8.4°C, January lows of −10°C, July highs of 28°C, 875 mm of precipitation a year.
- NOAA stationWhitmore Lake (1 mi NW)
- Station IDUSC00208972
- Location42.44°N 83.78°W
- Elevation906 ft (276 m)
- From the center2 miles
- Population (census place)8,083
On October 23, the normal high in Whitmore Lake is 57°F and the normal low 38°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Whitmore Lake.
- Jan 30° 15°
- Feb 34° 14°
- Mar 44° 24°
- Apr 57° 34°
- May 69° 45°
- Jun 77° 54°
- Jul 82° 59°
- Aug 79° 58°
- Sep 74° 50°
- Oct 60° 40°
- Nov 47° 30°
- Dec 35° 22°
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 Whitmore Lake each month?
July is the warmest month, with normal highs of 82°F; January the coldest, with normal lows of 15°F. The most precipitation falls in June (3.72 in), the least in February (2.07 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 30°F | 15°F | 22.4°F | 2.38 | – | <1 | 30 | 9 h 20 min |
| February | 34°F | 14°F | 23.8°F | 2.07 | – | <1 | 27 | 10 h 30 min |
| March | 44°F | 24°F | 33.8°F | 2.43 | – | <1 | 25 | 11 h 50 min |
| April | 57°F | 34°F | 45.3°F | 2.99 | – | <1 | 14 | 13 h 20 min |
| May | 69°F | 45°F | 56.8°F | 3.65 | – | <1 | 1 | 14 h 30 min |
| June | 77°F | 54°F | 65.8°F | 3.72 | – | 1 | <1 | 15 h 20 min |
| July | 82°F | 59°F | 70.2°F | 3.38 | – | 3 | <1 | 15 h |
| August | 79°F | 58°F | 68.5°F | 3.34 | – | 1 | <1 | 14 h |
| September | 74°F | 50°F | 61.8°F | 3.11 | – | 1 | <1 | 12 h 30 min |
| October | 60°F | 40°F | 50.1°F | 2.80 | – | <1 | 6 | 11 h 10 min |
| November | 47°F | 30°F | 38.3°F | 2.48 | – | <1 | 21 | 9 h 50 min |
| December | 35°F | 22°F | 28.4°F | 2.11 | – | <1 | 28 | 9 h 10 min |
| Year (annual) | 57°F | 37°F | 47.1°F | 34.46 | – | 6 | 152 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | −1°C | −10°C | −5.3°C | 60 mm |
| February | 1°C | −10°C | −4.6°C | 53 mm |
| March | 7°C | −5°C | 1.0°C | 62 mm |
| April | 14°C | 1°C | 7.4°C | 76 mm |
| May | 20°C | 7°C | 13.8°C | 93 mm |
| June | 25°C | 12°C | 18.8°C | 94 mm |
| July | 28°C | 15°C | 21.2°C | 86 mm |
| August | 26°C | 14°C | 20.3°C | 85 mm |
| September | 23°C | 10°C | 16.6°C | 79 mm |
| October | 16°C | 4°C | 10.1°C | 71 mm |
| November | 8°C | −1°C | 3.5°C | 63 mm |
| December | 2°C | −6°C | −2.0°C | 54 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Ann Arbor University of Michigan (11 miles away), gets 61 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00208972; 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 Whitmore Lake?
Normal highs sit between 65°F and 85°F in May, June, July, August and September.
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 USC00208972.
When is the last frost in Whitmore Lake?
In Whitmore Lake, the last spring frost (32°F) comes after May 5 in half of years and after May 21 in one year in ten; the first autumn frost comes before October 13 in half of years and before September 30 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 51 year in 10 after May 21; 9 in 10 after April 22
- First autumn frost, half of years before
- October 131 year in 10 before September 30; 9 in 10 before October 26
NOAA puts the median frost-free season at 160 days, and the season without a hard freeze (28°F) at 184 days.
A hard freeze (28°F) comes after April 26 in half of springs and before October 26 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Whitmore Lake in zone 6a in ZIP code 48189.
Frost dates for every NOAA station in Michigan · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00208972; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. 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 Whitmore Lake?
In a normal year in Whitmore Lake, 6 days a year reach 90°F and 152 nights fall to 32°F or colder.
- Days at 90°F or more
- 6a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 152a normal year
- Days that stay below freezing
- 55high of 32°F or less
Source: NOAA NCEI 1991-2020 annual normals, station USC00208972.
How sunny is Whitmore Lake?
Over a year 71% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Whitmore Lake, 3.8 kWh per square metre a day. July is the sunniest month (80%) and December the cloudiest (54%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 59% | 1.6 |
| February | 62% | 2.4 |
| March | 66% | 3.5 |
| April | 68% | 4.7 |
| May | 70% | 5.5 |
| June | 76% | 6.2 |
| July | 80% | 6.2 |
| August | 78% | 5.3 |
| September | 77% | 4.3 |
| October | 68% | 2.8 |
| November | 63% | 1.8 |
| December | 54% | 1.2 |
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 Whitmore Lake need?
A normal year in Whitmore Lake brings 6,967 heating degree days, 30% more than the median U.S. place (5,373), and 480 cooling degree days, 47% fewer than the median (908). Seven months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 2,470 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,320 | 0 |
| February | 1,153 | 0 |
| March | 968 | 1 |
| April | 592 | 1 |
| May | 276 | 22 |
| June | 66 | 88 |
| July | 17 | 177 |
| August | 25 | 135 |
| September | 146 | 52 |
| October | 468 | 5 |
| November | 801 | 0 |
| December | 1,133 | 0 |
| Year (annual) | 6,967 | 480 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00208972. 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 Whitmore Lake been warmer than normal lately?
2025 averaged 47.9°F, 0.8°F above the 1991-2020 normal of 47.1°F. 4 of the 4 complete years since 2022 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2022 | 47.5°F | +0.4°F | 29.60 |
| 2023 | 49.6°F | +2.5°F | 34.57 |
| 2024 | 51.1°F | +4.0°F | – |
| 2025 | 47.9°F | +0.8°F | – |
Source: observed years: ACIS, station USC00208972. A year counts only with all twelve months complete.
How does Whitmore Lake's climate compare?
Whitmore Lake is warmer than 75 of the other 139 places with their own NOAA record in Michigan, and wetter than 68. Across the 7,247 U.S. stations with normals, its annual mean of 47.1°F is warmer than 28%.
In the Köppen classification computed from these normals, Whitmore Lake 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 Whitmore Lake share this climate record?
South Lyon has no NOAA station with 1991-2020 normals of its 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.
- South Lyon, MI12,219 people · 7 mi E
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 Whitmore Lake's climate
What is the coldest month in Whitmore Lake?
January, with a normal high of 30°F and a normal low of 15°F. The warmest is July (82°F by day, 59°F at night).
Does it snow in Whitmore Lake?
Yes. NOAA publishes no 1991-2020 snowfall normal for Whitmore Lake's NOAA station; the nearest record that keeps one, Ann Arbor University of Michigan (11 miles away), records 61 inches of snow in a normal year.
What is the rainiest month in Whitmore Lake?
June, with 3.72 in of precipitation in a normal year; the driest is February with 2.07 in.
What plant hardiness zone is Whitmore Lake in?
The USDA's 2023 map puts Whitmore Lake in zone 6a in ZIP code 48189.
How late can frost come in Whitmore Lake?
In half of years the last 32°F night comes after May 5; in one year in ten it comes after May 21. Waiting until May 21 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Michigan climateThe statewide normals and every place in the state
- Hell, MI11 miles from this station, 47.9°F a year
- Milford, MI11 miles from this station, 47.7°F a year
- Ann Arbor University of Michigan, MI11 miles from this station, 48.8°F a year
- Howell, MI13 miles from this station, 47.5°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made