Pontiac Wastewater Treatment Plant, Michigan climate: Climate normals at a NOAA weather station

What is the weather like at Pontiac Wastewater Treatment Plant each month?

July is the warmest month, with normal highs of 82°F; January the coldest, with normal lows of 17°F. The most precipitation falls in May (3.81 in), the least in February (1.87 in).

Which months are mildest at Pontiac Wastewater Treatment Plant?

Normal highs sit between 65°F and 85°F in May, June, July, August and September. Of those, September 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.

When is the last frost at Pontiac Wastewater Treatment Plant?

In Pontiac Wastewater Treatment Plant, the last spring frost (32°F) comes after April 26 in half of years and after May 12 in one year in ten; the first autumn frost comes before October 22 in half of years and before October 7 in one year in ten.

Last spring frost, half of years after

April 261 year in 10 after May 12; 9 in 10 after April 15

First autumn frost, half of years before

October 221 year in 10 before October 7; 9 in 10 before November 4

NOAA puts the median frost-free season at 177 days, and the season without a hard freeze (28°F) at 200 days.

A hard freeze (28°F) comes after April 16 in half of springs and before November 4 in half of autumns.

The USDA's 2023 Plant Hardiness Zone Map puts Pontiac Wastewater Treatment Plant in zone 6a in ZIP code 48342, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, the station is in zone 6b: the coldest night of a typical year reaches −3°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

How hot and how cold does it get at Pontiac Wastewater Treatment Plant?

In a normal year in Pontiac Wastewater Treatment Plant, 10 days a year reach 90°F, 135 nights fall to 32°F or colder and 130 days bring measurable precipitation.

Days at 90°F or more

10a normal year

Days at 100°F or more

fewer than 1a normal year

Nights at 32°F or colder

135a normal year

Days that stay below freezing

47high of 32°F or less

Days with 0.01 inch of precipitation

130a normal year

Days with 1 inch of snow or more

11a normal year

The highest temperature in this station's record (since 1894) is 104°F, on July 8, 1936; the lowest is −22°F, on February 5, 1918.

The wettest calendar year on that record is 2011, with 45.29 in; the snowiest season is 1981–82, with 71.1 inches.

How sunny is it at Pontiac Wastewater Treatment Plant?

Over a year 71% of the sunlight that would reach the ground under clear skies gets through the clouds at Pontiac Wastewater Treatment Plant, 3.8 kWh per square metre a day. July is the sunniest month (80%) and December the cloudiest (54%).

How many heating and cooling degree days does Pontiac Wastewater Treatment Plant record?

A normal year at Pontiac Wastewater Treatment Plant brings 6,474 heating degree days, 20% more than the median U.S. place (5,373), and 720 cooling degree days, 21% 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 2,869 growing degree days a year above 50°F.

Have recent years at Pontiac Wastewater Treatment Plant been warmer than normal?

2025 averaged 50.0°F, 0.9°F above the 1991-2020 normal of 49.1°F. 3 of the 4 complete years since 2021 ran warmer than the normal.

Over 76 complete years from 1912 to 2025, the station's annual mean temperature rose at a fitted 3.0°F per century (+0.17°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.

Which places near Pontiac Wastewater Treatment Plant share this climate record?

13 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.

• Troy, MIalso near: Farmington (14 mi, 47.6°F a year); Pontiac (15 mi, 48.4°F a year)89,209 people · 7 mi SE
• Rochester Hills, MIalso near: Pontiac (13 mi, 48.4°F a year); White Lake (4 mi E) (16 mi, 45.6°F a year)78,330 people · 5 mi E
• Royal Oak, MIalso near: Farmington (11 mi, 47.6°F a year); Dearborn (14 mi, 49.5°F a year)58,251 people · 10 mi SE
• Madison Heights, MI28,626 people · 12 mi SE
• Auburn Hills, MI26,047 people · 3 mi N
• Birmingham, MI22,198 people · 7 mi S
• Rochester, MI12,978 people · 8 mi NE
• Clawson, MI11,440 people · 9 mi SE
• Bloomfield Hills, MI4,444 people · 4 mi S
• Oxford, MI3,490 people · 13 mi N
• Lake Orion, MI2,858 people · 10 mi N
• Keego Harbor, MI2,765 people · 5 mi SW
• Sylvan Lake, MI1,712 people · 4 mi W

Nearby and next

• Michigan climateThe statewide normals and every place in the state
• Pontiac, MI9 miles from this station, 48.4°F a year
• White Lake (4 mi E), MI12 miles from this station, 45.6°F a year
• Farmington, MI13 miles from this station, 47.6°F a year
• Dearborn, MI22 miles from this station, 49.5°F a year
• Compare two placesMonth by month, side by side

Download these normals (CSV) · JSON · How these figures are made