How extreme does Royal Oak's weather get?

The hottest, coldest, wettest and snowiest days Royal Oak has recorded — the outer limits of what its weather can do, and how far they sit beyond a normal day.

Based on 50+ years of daily weather observations (1971–present), from the Detroit City Ap station 14 km away. Updated through June 2026 — an all-time extreme only changes when a more extreme day actually occurs, so some dates are old. That is normal, not stale data.

The four kinds of extreme

The hottest, coldest, wettest and snowiest single days Royal Oak has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day

103°F Jun 25, 1988

That is about 24°F hotter than a normal June afternoon in Royal Oak (typical high near 79°F).

The three most extreme on record

1 103°F Jun 25, 1988

2 103°F Jul 14, 1995

3 102°F Jul 7, 1988

❄️ Coldest night

-17°F Jan 19, 1994

About 37°F colder than a normal January night in Royal Oak (typical low near 20°F).

The three most extreme on record

1 -17°F Jan 19, 1994

2 -13°F Jan 20, 1985

3 -12°F Jan 21, 1985

🌧️ Most rain in one day

4.07 in Sep 29, 2016

More rain in a single day than Royal Oak usually gets in the whole month of September (typical September total about 3.1 in).

The three most extreme on record

1 4.07 in Sep 29, 2016

2 3.03 in May 25, 2011

3 2.91 in Jul 8, 2016

⛄ Most snow in one day

18.0 in Dec 1, 1974

The three most extreme on record

1 18.0 in Dec 1, 1974

2 9.0 in Dec 8, 1977

3 7.0 in Dec 9, 1977

How hot and cold it gets, month by month

The shaded band is the normal range of daily temperatures for each month. The dots show the most extreme it has ever been — so you can see how far beyond a normal day the records really sit.

normal range of daily temperatureshottest ever recordedcoldest ever recorded

Royal Oak's record heat sits well above even a hot day for the season — June's 103°F is about 24°F beyond a normal hot afternoon. Its record cold is just as far below a normal winter night — the dots mark how rare each extreme really is.

In plain terms

In a normal year, Royal Oak's warmest days reach the mid-80s°F and its coldest nights drop to the low 20s°F. But across the record it has gone as high as 103°F and as low as −17°F. A single day has delivered over 4 inches of rain or close to 18 inches of snow. Those are the outer edges worth knowing if you are moving here, planning a trip, or thinking about a house.

Methodology & sources

Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Detroit City AP (NOAA GHCN station USW00014822), about 14 km from the city centre.

How we build these numbers →

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