Climateby Month

Dearborn, MI climate by month

NOAA 1991-2020 normals · 591 ft elevation

Summers in Dearborn are warm and often humid; winters are cold and snowy. Highs peak at 84°F in July and fall to 32°F in January. Wet days are spread through the year, from about 10 to 13 a month. Normal snowfall is about 45 in a year. The most comfortable time to visit is May.

Warmest month
84°F
July normal high
Coldest month
18°F
January normal low
Wet days a year
136
34.3 in of precipitation
Snow a year
45.0 in
normal snowfall

How warm is Dearborn?

Normal highs range from 32°F in January to 84°F in July.

0°20°40°60°80°100° January: normal high 32°F (0°C), low 18°F (-8°C) 32° 18° February: normal high 35°F (2°C), low 19°F (-7°C) March: normal high 45°F (7°C), low 26°F (-3°C) April: normal high 58°F (14°C), low 37°F (3°C) May: normal high 70°F (21°C), low 48°F (9°C) June: normal high 79°F (26°C), low 58°F (14°C) July: normal high 84°F (29°C), low 62°F (17°C) 84° 62° August: normal high 82°F (28°C), low 61°F (16°C) September: normal high 75°F (24°C), low 53°F (12°C) October: normal high 62°F (17°C), low 42°F (6°C) November: normal high 48°F (9°C), low 32°F (0°C) December: normal high 37°F (3°C), low 24°F (-4°C) JFMAMJJASOND

Bars run from the normal low to the normal high for each month.

How rainy is Dearborn?

January has the most wet days (about 13); the year brings about 34 in of precipitation.

January: 13 wet days 13 February: 11 wet days March: 11 wet days April: 13 wet days May: 13 wet days June: 11 wet days July: 11 wet days August: 10 wet days September: 10 wet days 10 October: 11 wet days November: 11 wet days December: 13 wet days JFMAMJJASOND

Wet day: at least 0.01 in of rain or melted snow, counted from daily records 1991-2020.

How much does it snow?

Normal snowfall is 45.0 in a year, most of it in January.

January: 14.0 in of snow 14.0 February: 12.5 in of snow March: 6.2 in of snow April: 1.5 in of snow May: 0.0 in of snow 0.0 June: 0.0 in of snow July: 0.0 in of snow August: 0.0 in of snow September: 0.0 in of snow October: 0.0 in of snow November: 1.9 in of snow December: 8.9 in of snow JFMAMJJASOND

How humid is Dearborn?

Muggy days peak in July, at about 10 days.

January: 0 muggy days 0 February: 0 muggy days March: 0 muggy days April: 0 muggy days May: 1 muggy days June: 5 muggy days July: 10 muggy days 10 August: 10 muggy days September: 3 muggy days October: 0 muggy days November: 0 muggy days December: 0 muggy days JFMAMJJASOND

Muggy day: daily mean dew point of 65°F or higher, from hourly observations 1991-2020 at Detroit Metro Wayne County Airport, 10 mi SW of the city center.

How much daylight?

Daylight ranges from about 9.1 hours in December to 15.2 hours in June.

January: 9.5 hours of daylight February: 10.6 hours of daylight March: 11.9 hours of daylight April: 13.4 hours of daylight May: 14.6 hours of daylight June: 15.2 hours of daylight 15.2 July: 14.9 hours of daylight August: 13.8 hours of daylight September: 12.5 hours of daylight October: 11.1 hours of daylight November: 9.8 hours of daylight December: 9.1 hours of daylight 9.1 JFMAMJJASOND
See all numbers
Monthly climate normals and day counts for Dearborn, 1991-2020
MonthHighLowPrecip.Wet daysSnowMuggy daysDaylight
January 32°F18°F 2.2 in13 14.0 in 0 9.5 h
February 35°F19°F 2.1 in11 12.5 in 0 10.6 h
March 45°F26°F 2.4 in11 6.2 in 0 11.9 h
April 58°F37°F 3.3 in13 1.5 in 0 13.4 h
May 70°F48°F 3.7 in13 0.0 in 1 14.6 h
June 79°F58°F 3.3 in11 0.0 in 5 15.2 h
July 84°F62°F 3.5 in11 0.0 in 10 14.9 h
August 82°F61°F 3.3 in10 0.0 in 10 13.8 h
September 75°F53°F 3.2 in10 0.0 in 3 12.5 h
October 62°F42°F 2.5 in11 0.0 in 0 11.1 h
November 48°F32°F 2.6 in11 1.9 in 0 9.8 h
December 37°F24°F 2.3 in13 8.9 in 0 9.1 h

High and low: NOAA 1991-2020 normal daily high and low. Wet days: at least 0.01 in of rain or melted snow. Muggy days: daily mean dew point 65°F or higher.

Best months to visit Dearborn

By our comfort score, the best month is May.

Comfort score by month (0-100) and its parts, in days per month
MonthScoreComfortableNotable rainHot or cold
Jan 260625
Feb 310520
Mar 432611
Apr 61972
May 731681
Jun 671164
Jul 56567
Aug 59764
Sep 671562
Oct 611260
Nov 41267
Dec 290519

Score = 40 × share of comfortable days + 25 × share of days without notable rain + 20 × share of days neither hot (90°F+) nor cold (high 40°F or below) + 15 × daylight. How the score works.

Frost dates in Dearborn

The last spring frost typically comes around May 1, and the first fall frost around Oct 15, leaving 166 frost-free days in a typical year.

Frost and freeze dates for Dearborn
Typical date1 year in 10
Last spring frost (32°F)May 1after May 18
First fall frost (32°F)Oct 15before Oct 1
Last hard freeze (28°F)Apr 20after May 7
First hard freeze (28°F)Oct 28before Oct 13
Frost-free season166 daysunder 147 days

"Typical" is the date with a 50% chance of a later spring frost (or earlier fall frost). Planting after the "1 year in 10" spring date gives a 90% chance of no further frost. The Old Farmer's Almanac publishes 30% dates, which fall between our typical and 1-in-10 dates.

Station: Dearborn (USC00202015), NOAA 1991-2020 freeze probabilities. Frost dates for every city in Michigan.

Hottest and coldest readings, 1991-2020

The highest reading was 102°F (July 18, 2012); the lowest was -20°F (January 19, 1994).

From the temperature station's daily records with NOAA quality flags removed. Not an all-time record.

Near Dearborn

Similar climates elsewhere

Where the numbers come from

  • Temperature and frost dates: Dearborn (USC00202015), 3.1 mi W of the city center, 605 ft . NOAA normals and daily records, 1991-2020.
  • Rain, snowfall and snow depth: Detroit Metro Airport (USW00094847), 10 mi SW of the city center, 631 ft . NOAA normals and daily records, 1991-2020.
  • Humidity and wind by hour: Detroit City Airport (USW00014822), 10 mi NE of the city center, 626 ft . NOAA normals and daily records, 1991-2020.
  • Cloud cover: Flint Bishop Intl Airport (USW00014826), 53 mi NNW of the city center, 770 ft (179 ft higher than the city). NOAA normals and daily records, 1991-2020.
  • Daily humidity and wind: Detroit Metro Wayne County Airport (725370-94847), 10 mi SW of the city center, 630 ft . Hourly observations, 1991-2020.

Distances from the city center (USGS). Methodology · Report an error