Rochester Hills climate — normals and trends
Rochester Hills (United States) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 8.8 °C and it receives 889 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is July (21.9 °C on average) and the coldest is January (-5.1 °C). Rainfall peaks in May.
Rochester Hills averages 127 frost days, 17 hot days (≥ 30 °C) and 124 rainy days per year.
Rochester Hills has warmed by +1.9 °C between 1940 and 2025, or +0.22 °C per decade. This trend is statistically significant.
The number of frost days there went from about 140 to 114 per year over the period.
The hottest day of the period reached 38.8 °C (on 25 June 1988) and the coldest -28.8 °C (on 19 January 1994).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
Rochester HillsMichigan
- coords
- 42.66°, -83.15°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
8.8°C
Average daily high
13.5°C
Average daily low
4.4°C
Annual rainfall
889mm
Sunshine / day
8.7h
Mean relative humidity
71%
Average peak wind
18.2km/h
Seasonal range
27.0°C
Frost days (< 0 °C)
127 d/yr
Hot days (≥ 30 °C)
17 d/yr
Rainy days (≥ 1 mm)
124 d/yr
Annual snowfall
89.4 cm
Average feels-like high
11.2 °C
Average feels-like low
1.3 °C
Average peak gust
39.3 km/h
Tropical nights (≥ 20 °C)
14 d/yr
Solar radiation
14.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.9 °C
since 1940
+0.2 °C per decade · r² = 0.38 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
38.8 °C
25 June 1988
Coldest day
-28.8 °C
19 January 1994
Wettest day
125 mm
25 June 1968
Windiest day
48.7 km/h
22 March 1955
Strongest gust
103.3 km/h
10 November 1998
Hottest feels-like
43.3 °C
14 July 1995
Coldest feels-like
-34.2 °C
19 January 1994
Snowiest day
25.8 cm
25 March 1947
Sunniest day
15.0 h
2 June 1940
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | -2.6 °C | -1.2 °C | 37 mm | -18 mm |
| Feb | -0.8 °C | -1.0 °C | 46 mm | -5 mm |
| Mar | 10.9 °C | +4.9 °C | 77 mm | +10 mm |
| Apr | 14.9 °C | +1.6 °C | 84 mm | -3 mm |
| May | 18.3 °C | -1.3 °C | 86 mm | -6 mm |
| Jun | 26.7 °C | +1.8 °C | 113 mm | +20 mm |
| Jul | 28.3 °C | +1.3 °C | 116 mm | +30 mm |
| Aug | 25.7 °C | -0.2 °C | 42 mm | -40 mm |
| Sep | 23.9 °C | +2.0 °C | 61 mm | -14 mm |
| Oct | 17.5 °C | +2.2 °C | 68 mm | -2 mm |
| Nov | 7.5 °C | -0.1 °C | 43 mm | -28 mm |
| Dec | 0.5 °C | -0.6 °C | 84 mm | +23 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Rochester Hills?
Rochester Hills has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 8.8 °C and it receives 889 mm of precipitation per year.
What is the hottest day ever recorded in Rochester Hills?
The hottest day measured in Rochester Hills between 1940 and 2025 was 25 June 1988, reaching 38.8 °C.
What is the coldest day in Rochester Hills?
The coldest day measured in Rochester Hills between 1940 and 2025 was 19 January 1994, at -28.8 °C.
Does it snow in Rochester Hills?
Yes. Rochester Hills gets on average 89.4 cm of snow per year and has around 127 frost days.
Has the climate of Rochester Hills warmed?
Yes: Rochester Hills warmed by +1.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Rochester Hills?
The wettest day measured in Rochester Hills between 1940 and 2025 was 25 June 1968, with 125 mm of rain in 24 hours.
What was the windiest day in Rochester Hills?
The windiest day measured in Rochester Hills between 1940 and 2025 was 22 March 1955, with winds reaching 48.7 km/h.
What is the warmest month in Rochester Hills?
The warmest month in Rochester Hills is July (21.9 °C on average); the coldest is January (-5.1 °C).
How much does it rain in Rochester Hills?
Rochester Hills receives on average 889 mm of precipitation per year, spread over about 124 rainy days.
Is it sunny in Rochester Hills?
Rochester Hills gets on average 8.7 hours of sunshine per day, roughly 3,175 hours per year over 1940-2025.
What is the biggest single-day snowfall in Rochester Hills?
The heaviest 24-hour snowfall measured in Rochester Hills between 1940 and 2025 was 25 March 1947, with 25.8 cm.
Are there tropical nights in Rochester Hills?
Yes: Rochester Hills has on average 14 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Rochester Hills?
In Rochester Hills, between 1940 and 2025, the highest apparent temperature reached 43.3 °C on 14 July 1995, and the lowest was -34.2 °C on 19 January 1994.
Compare Rochester Hills with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Rochester Hills