Port Huron, MI Climate: Temperature & Rain by Month
Temperature and precipitation from NOAA NCEI 1991–2020 normals →, plus PlainClimate's derived comfort score
30-year climate normals (1991-2020) from Port Huron's primary NOAA station, PORT HURON.
The climate verdict for Port Huron
Port Huron, Michigan has a mixed annual climate rather than one dominant extreme. Its NOAA normal shows an annual average of 50°F. Its climate comfort score of 63/100 (good) lands mid-pack nationally, exceeding 46% of station-mapped location scores.
- 50°F
- annual average temperature (NOAA normal)
- 63/100
- comfort score, above 46% of station-mapped location scores
- 34.9"
- annual precipitation · 36" snow
- 198 days
- growing season, frost-free days
Port Huron: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00206680 · Port Huron, MI 50°F mean · 34.9" precip
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-MID · SWING-WIDE · COMF-MID · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 50°F
- RANK-COOL #2,607
- PHOTO-FINISH ≈ Garrett
- PRCP-MID 34.9"
- SWING-WIDE 48°F
- COMF-MID 63/100
- LOAD-HEAT 6,343 HDD
- STN-1 USC00206680
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Garrett, IN (+ 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.
- Port Huron (this station) 50°F
- Hot Ferron, UT 50°F
- Near Garrett, IN 50°F
- Near Dearborn, MI 50°F
- Near Price Carbon Co…, UT 50°F
Climate Living Index · Port Huron
Port Huron: 57/100 · grade C
Port Huron publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Port Huron, not an official NOAA rating. Rankings still use Comfort Score 63/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Precipitation balance | 34.9 in · 0.1 from 35 in | 96/100 · A |
| Frost-free season | 198 days/year | 63/100 · C |
| Normal heat + freeze calendar | 126 calendar days | 61/100 · C |
| Annual temperature balance | 49.5°F · 18.0° from 67.5°F | 38/100 · F |
| Snowfall burden | 35.5 inches/year | 33/100 · F |
Port Huron · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Port Huron is a continental Köppen climate: Dfa
Coldest-month mean 25.4°F and warmest-month mean 73.3°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
- 73.3°F
- Coldest month
- 25.4°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 Port Huron sits across the climate record
Three NOAA fields for Port Huron's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 38th percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- 48th percentile wetness
- Neither arid nor torrential versus 6,352 station totals.
- Seasonal temperature swing
- Wider than 72%
- Warmest-to-coldest month gap for Port Huron is large versus 6,861 complete station-years.
How Port Huron compares across U.S. station-mapped locations
Port Huron's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
63 46th percentile score exceeds 46% 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
Port Huron's measured station temperature trend
MethodologyAcross 68 complete annual observations from 1934 to 2025, PORT HURON warmed at a fitted rate of 0.22°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Port Huron primary station fitted change +0.22 °C/decade
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 31°F (-1°C) | 20°F (-7°C) | 25°F (-4°C) | 2.5" | 11.1" | 27.8 | 0.0 |
| February | 33°F (1°C) | 21°F (-6°C) | 27°F (-3°C) | 2.1" | 11.4" | 25.8 | 0.0 |
| March | 42°F (6°C) | 28°F (-2°C) | 35°F (2°C) | 2.2" | 4.6" | 22.9 | 0.0 |
| April | 54°F (12°C) | 38°F (3°C) | 46°F (8°C) | 3.1" | 0.4" | 7.6 | 0.0 |
| May | 67°F (19°C) | 49°F (9°C) | 58°F (14°C) | 3.5" | 0.0" | 0.3 | 0.4 |
| June | 76°F (25°C) | 59°F (15°C) | 68°F (20°C) | 3.6" | 0.0" | 0.0 | 2.6 |
| July | 81°F (27°C) | 65°F (18°C) | 73°F (23°C) | 3.3" | 0.0" | 0.0 | 4.0 |
| August | 80°F (27°C) | 64°F (18°C) | 72°F (22°C) | 3.1" | 0.0" | 0.0 | 2.0 |
| September | 73°F (23°C) | 57°F (14°C) | 65°F (18°C) | 3.3" | 0.0" | 0.0 | 1.0 |
| October | 61°F (16°C) | 46°F (8°C) | 53°F (12°C) | 3.1" | 0.0" | 1.2 | 0.0 |
| November | 47°F (8°C) | 35°F (2°C) | 41°F (5°C) | 2.8" | 1.3" | 12.7 | 0.0 |
| December | 36°F (2°C) | 26°F (-3°C) | 31°F (0°C) | 2.2" | 6.7" | 24.1 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 82°F around July 18, 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 29, then returns to freezing around November 25, 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 January 7, when 46% of years recorded at least a hundredth of an inch. The driest is August 30 at 33%. Summed across the calendar, that is about 140 wet dates a year.
The widest day
May 24 carries the biggest normal gap between afternoon and dawn, 18°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Port Huron.
Where Port Huron Stands Nationally
Among the steadiest day-night climates ranked: even the widest normal daily swing holds to roughly 18°F.
Port Huron earns one nationally notable standing (outer quintile) against 6,860 NOAA 1991–2020 normals stations, middle-of-the-pack metrics stay silent here.
Monthly Precipitation
Average monthly rainfall and snowfall
Snow: 11.1"
14.0 days with precipitation
Snow: 11.4"
10.3 days with precipitation
Snow: 4.6"
10.8 days with precipitation
Snow: 0.4"
12.9 days with precipitation
13.0 days with precipitation
10.9 days with precipitation
10.1 days with precipitation
10.3 days with precipitation
10.1 days with precipitation
12.6 days with precipitation
Snow: 1.3"
11.8 days with precipitation
Snow: 6.7"
12.7 days with precipitation
Port Huron spreads its precipitation across the year
Neither half of the year dominates here: June through August take 29% of the annual total and December through February 19%, with neither reaching the 35% that would mark a distinct wet season. Port Huron has no dry season to plan around, though it does carry a wide 47.9°F gap between its warmest and coldest month.
The gap between the wettest and driest month still matters: June averages 3.6" and February 2.1". The three wettest months together take 30% 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 Port Huron's precipitation splits across the calendar
About 139 days a year record measurable precipitation here, carrying 34.9" between them, or roughly 0.25 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.
Winter brings real snow to Port Huron
Port Huron averages 35.5 inches of snowfall a year, with February the snowiest month on the normals, spread across roughly 22 days that record measurable snow. That is depth accumulating on the ground, which is why it can exceed the annual precipitation figure: precipitation counts the liquid the snow melts down to, and fresh snow is mostly air.
- Annual snowfall: 35.5 inches of depth.
- Days recording measurable snow: about 22 a year.
- At a rough ten-to-one melt ratio, snow accounts for on the order of 10% of the year's precipitation.
NOAA 1991-2020 normals. The ten-to-one ratio is a convention, not a measurement: real ratios vary with temperature, so treat the share as an order of magnitude rather than an exact split.
Frost Dates & Growing Season
First Fall Freeze
November 3
50% probability date
Last Spring Freeze
April 19
50% probability date
Growing Season
198 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
6,343
Higher = more heating needed
Cooling Degree Days
749
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside MI closest to Port Huron 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 (50°F here).
- Ankeny, IA 50°F · 0.0°F off
- Bartlett, NE 50°F · 0.0°F off
- Columbia City, IN 50°F · 0.0°F off
- Galva, IL 50°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (34.9" here), excluding temperature-peer places.
- New London, WI 34.9" · 0.0" off
- Blanco, TX 34.8" · 0.1" off
- Glenwood, IA 34.8" · 0.1" off
- Winterset, IA 34.8" · 0.1" off
Snow and freeze rhythm
When cold and snow define Port Huron
heating led · moderate · mid swing
Port Huron's energy balance leans toward cold weather: 6,343 annual heating degree days against 749 for cooling. Its 47.9°F seasonal range still makes the monthly rows more useful than the annual average alone.
Port Huron's frost-free season lasts about 198 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
-
1. Port Huron coldest normal
January
Averaging 25°F (-4°C), this month sits below freezing for the month as a whole, not merely overnight.
-
2. Port Huron typical freeze period
January through December
The station reports average freezing days from January through December.
-
3. Port Huron snow peak
February
Port Huron averages 35.5 inches of snow a year, with February the snowiest month on the normals.
Questions about Port Huron's climate
How much snow does Port Huron get? ▼
How cold does Port Huron get in winter? ▼
How much energy does heating and cooling require in Port Huron? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Port Huron's primary station: PORT HURON (USC00206680). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The 2024 Census Gazetteer identifies the exact name-and-state match as an incorporated place (GEOID 2665820). Match rule for Port Huron: exact normalized name + state only, no fuzzy expansion, so nearby differently spelled facilities stay unmatched.
On this page every temperature, precipitation, and derived score for Port Huron 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.