Detroit Willow Run, MI Climate: Temperature & Rain by Month
Pulled from NOAA NCEI 1991–2020 normals →: climate measurements used in PlainClimate's documented score
30-year climate normals (1991-2020) from Detroit Willow Run's primary NOAA station, DETROIT WILLOW RUN AP.
The climate verdict for Detroit Willow Run
Detroit Willow Run, Michigan has a mixed annual climate rather than one dominant extreme. Its NOAA normal shows an annual average of 51°F. Its climate comfort score of 68/100 (good) lands mid-pack nationally, exceeding 56% of station-mapped location scores.
- 51°F
- yearly average temperature, NOAA normal
- 68/100
- comfort score, above 56% of station-mapped location scores
- 30.2"
- precipitation, annual total
- 183 days
- frost-free growing season
Detroit Willow Run: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USW00014853 · Detroit Willow Run, MI 51°F mean · 30.2" precip
TEMP-COOL · RANK-MID · PHOTO-FINISH · PRCP-MID · SWING-WIDE · COMF-MID · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 51°F
- RANK-MID #3,156
- PHOTO-FINISH ≈ Hennepin
- PRCP-MID 30.2"
- SWING-WIDE 48°F
- COMF-MID 68/100
- LOAD-HEAT 5,866 HDD
- STN-1 USW00014853
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Hennepin, IL (+ 0 °F mean)
Instrument codes from this station's NOAA 1991–2020 normals, mean temperature, corpus warmth rank, photo-finish peer station, precipitation band, seasonal swing, comfort composite, degree-day load, and field book, not a livability rating.
Mean-temperature neighbourhood
Nationwide NOAA normal poles and nearest peers, not a reprint of every MI station list.
- Detroit Willow… (this station) 51°F
- Hot Wabash, IN 51°F
- Near Hennepin, IL 51°F
- Near Paris Stp, IL 51°F
- Near Burlington Cars…, CO 51°F
Climate Living Index · Detroit Willow Run
Detroit Willow Run: 59/100 · grade C
Detroit Willow Run publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals · NOAA hourly normals); 1 missing weight rescale to 100.
PlainClimate-derived for Detroit Willow Run, not an official NOAA rating. Rankings still use Comfort Score 68/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Precipitation balance | 30.2 in · 4.8 from 35 in | 83/100 · B |
| Normal heat + freeze calendar | 126 calendar days | 61/100 · C |
| Summer moisture balance | 60.5°F mean dew point | 60/100 · C |
| Frost-free season | 183 days/year | 52/100 · D |
| Annual temperature balance | 51.4°F · 16.1° from 67.5°F | 46/100 · D |
Detroit Willow Run · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Detroit Willow Run is a continental Köppen climate: Dfa
Coldest-month mean 26.6°F and warmest-month mean 74.8°F place this station in continental, no dry season, hot summer climates (Dfa). Class Dfa is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: continental, specifically continental, no dry season, hot summer.
- Köppen code
- Dfa
- Group
- Continental
- Warmest month
- 74.8°F
- Coldest month
- 26.6°F
Source: official public datasets monthly normals (1991–2020) at the city’s primary station. This is a station classification, not a mapped regional consensus.
National standing · heating-led station
Where Detroit Willow Run sits across the climate record
Three NOAA fields for Detroit Willow Run's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 46th percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- 40th percentile wetness
- Neither arid nor torrential versus 6,352 station totals.
- Seasonal temperature swing
- Wider than 74%
- Warmest-to-coldest month gap for Detroit Willow Run is large versus 6,861 complete station-years.
How Detroit Willow Run compares across U.S. station-mapped locations
Detroit Willow Run's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
68 Top 44% score exceeds 56% of 6,189 station-mapped location scores
- 0–10: 0 station-mapped locations (0%). Below this entry.
- 10–20: 0 station-mapped locations (0%). Below this entry.
- 20–30: 96 station-mapped locations (2%). Below this entry.
- 30–40: 280 station-mapped locations (5%). Below this entry.
- 40–50: 1,113 station-mapped locations (18%). Below this entry.
- 50–60: 1,329 station-mapped locations (21%). Below this entry.
- 60–70: 1,236 station-mapped locations (20%). This entry sits in this band.
- 70–80: 650 station-mapped locations (11%). Above this entry.
- 80–90: 921 station-mapped locations (15%). Above this entry.
- 90–100: 564 station-mapped locations (9%). Above this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Detroit Willow Run's measured station temperature trend
MethodologyAcross 46 complete annual observations from 1948 to 2024, DETROIT WILLOW RUN AP warmed at a fitted rate of 0.21°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Detroit Willow Run primary station fitted change +0.21 °C/decade
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 34°F (1°C) | 20°F (-7°C) | 27°F (-3°C) | 1.7" | 27.6 | 0.0 |
| February | 37°F (3°C) | 21°F (-6°C) | 29°F (-2°C) | 1.4" | 25.4 | 0.0 |
| March | 48°F (9°C) | 29°F (-2°C) | 38°F (3°C) | 2.1" | 22.6 | 0.0 |
| April | 61°F (16°C) | 39°F (4°C) | 50°F (10°C) | 3.1" | 8.7 | 0.0 |
| May | 73°F (23°C) | 50°F (10°C) | 61°F (16°C) | 3.3" | 1.1 | 1.3 |
| June | 82°F (28°C) | 60°F (15°C) | 71°F (22°C) | 3.0" | 0.0 | 4.5 |
| July | 86°F (30°C) | 63°F (17°C) | 75°F (24°C) | 3.0" | 0.0 | 8.9 |
| August | 84°F (29°C) | 62°F (17°C) | 73°F (23°C) | 3.1" | 0.0 | 4.0 |
| September | 77°F (25°C) | 54°F (12°C) | 66°F (19°C) | 3.0" | 0.0 | 2.2 |
| October | 64°F (18°C) | 43°F (6°C) | 54°F (12°C) | 2.5" | 4.5 | 0.0 |
| November | 50°F (10°C) | 34°F (1°C) | 42°F (6°C) | 2.2" | 15.4 | 0.0 |
| December | 39°F (4°C) | 26°F (-3°C) | 32°F (0°C) | 1.7" | 24.8 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 87°F around July 9, short of 90°F on every date, while 126 dates carry a normal low at or below freezing, the coldest 18°F near January 26.
The freezing stretch
The normal low stays at or below 32°F into March 26, then returns to freezing around November 22, covering 126 dates in all.
Derived from the normal daily minimum. This is a different measure from the 50%-probability frost dates shown elsewhere on this page, which come from NOAA’s frost product.
Where the wet dates fall
The likeliest wet date is May 13, when 45% of years recorded at least a hundredth of an inch. The driest is February 1 at 28%. Summed across the calendar, that is about 135 wet dates a year.
The widest day
September 19 carries the biggest normal gap between afternoon and dawn, 24°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Detroit Willow Run.
Monthly Precipitation
Average monthly rainfall
9.2 days with precipitation
8.2 days with precipitation
9.8 days with precipitation
12.6 days with precipitation
14.0 days with precipitation
11.4 days with precipitation
10.8 days with precipitation
11.7 days with precipitation
12.5 days with precipitation
13.2 days with precipitation
10.9 days with precipitation
11.0 days with precipitation
Detroit Willow Run spreads its precipitation across the year
Neither half of the year dominates here: June through August take 30% of the annual total and December through February 16%, with neither reaching the 35% that would mark a distinct wet season. Detroit Willow Run has no dry season to plan around, though it does carry a wide 48.2°F gap between its warmest and coldest month.
The gap between the wettest and driest month still matters: May averages 3.3" and February 1.4". The three wettest months together take 32% of the year, against the 25% a perfectly flat distribution would give them.
Shares are computed from this station's own 1991-2020 monthly precipitation normals. "Spread across the year" means neither the June-August nor the December-February share reaches 35%; it describes an average year, not the variability of any single one.
How Detroit Willow Run's precipitation splits across the calendar
About 135 days a year record measurable precipitation here, carrying 30.2" between them, or roughly 0.22 inches on a typical wet day. That sits in the middle band: neither the many-light-days pattern of the Pacific Northwest and the Great Lakes, nor the few-heavy-events pattern of the Gulf and the desert Southwest.
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year and say nothing about the heaviest single storm on record.
Frost Dates & Growing Season
First Fall Freeze
October 24
50% probability date
Last Spring Freeze
April 24
50% probability date
Growing Season
183 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
5,866
Higher = more heating needed
Cooling Degree Days
942
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Humidity & Wind
Monthly averages from hourly observations
| Month | Humidity | Wind (mph) | Clear Sky % | Overcast % |
|---|---|---|---|---|
| January | 73% | 10.3 | 31% | 46% |
| February | 69% | 10.4 | 38% | 43% |
| March | 63% | 10.2 | 42% | 35% |
| April | 60% | 9.5 | 48% | 27% |
| May | 65% | 8.0 | 49% | 22% |
| June | 66% | 7.7 | 54% | 11% |
| July | 68% | 7.0 | 54% | 11% |
| August | 73% | 6.8 | 56% | 14% |
| September | 72% | 7.9 | 52% | 22% |
| October | 70% | 9.4 | 44% | 35% |
| November | 73% | 10.3 | 31% | 52% |
| December | 74% | 10.5 | N/A | N/A |
Nationwide similar cities
Other rankable U.S. places outside MI closest to Detroit Willow Run on two NOAA annual-normal axes (mean temperature and annual precipitation). Chip rows use distinct link sets.
Closest by average temperature
Nearest out-of-state peers by annual mean temperature (51°F here).
- Aberdeen, WA 51°F · 0.0°F off
- Astoria, OR 51°F · 0.0°F off
- Beatrice, NE 51°F · 0.0°F off
- Brockton, MA 51°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (30.2" here), excluding temperature-peer places.
- York, NE 30.2" · 0.0" off
- Sibley, IA 30.2" · 0.0" off
- Penn Yan, NY 30.2" · 0.0" off
- Lake Wilson, MN 30.1" · 0.1" off
Data-derived climate profile
How Detroit Willow Run's climate pattern fits together
heating led · moderate · mid swing
Detroit Willow Run's energy balance leans toward cold weather: 5,866 annual heating degree days against 942 for cooling. Its 48.2°F seasonal range still makes the monthly rows more useful than the annual average alone.
Detroit Willow Run's frost-free season lasts about 183 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
July and January mark the typical warm and cold ends of the calendar in Detroit Willow Run's middle-range seasonal profile. The measured spread is 48.2°F. The annual average is 51°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
Detroit Willow Run's 30.2 inches of annual precipitation falls in PlainClimate's middle band, so “wet” or “dry” is not the leading description. Snowfall is not added to the interpretation because its annual value is missing. Temperature balance and the calendar distribution carry more information than the annual moisture label alone.
These labels group NOAA 1991-2020 normals from Detroit Willow Run's primary station, so the winter figures are a thirty-year average and not a floor: a single hard season can run well below them. Treat each band as a descriptive range for Detroit Willow Run, not an official NOAA class or a year-ahead forecast.
Questions about Detroit Willow Run's climate
How much rain does Detroit Willow Run get? ▼
How cold does Detroit Willow Run get in winter? ▼
How much energy does heating and cooling require in Detroit Willow Run? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Detroit Willow Run's primary station: DETROIT WILLOW RUN AP (USW00014853). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The conservative exact name-and-state crosswalk finds no Census place match, so PlainClimate treats this as a station-mapped location and does not claim it is a municipality. No exact Gazetteer row for Detroit Willow Run; facility counts that depend on place identity are therefore an upper bound, not a municipal census.
On this page every temperature, precipitation, and derived score for Detroit Willow Run comes from its primary NOAA station record. No figure on this page is typed in by an editor - each value is rendered from NOAA 1991-2020 U.S. Climate Normals. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 1991–2020 normals.