Port Hope, Michigan climate: Normal weather by month, frost dates and records
Port Hope's normal year runs from 19°F January nights to 77°F July afternoons, with 30.4 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 8.4°C, January lows of −7°C, July highs of 25°C, 771 mm of precipitation a year.
- NOAA stationPort Hope
- Station IDUSW00094898
- Location44.02°N 82.79°W
- Elevation590 ft (180 m)
- Population273
On October 23, the normal high in Port Hope is 56°F and the normal low 43°F, and the chance of measurable rain or snow is 48%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Port Hope.
- Jan 30° 19°
- Feb 31° 19°
- Mar 39° 26°
- Apr 50° 35°
- May 62° 45°
- Jun 71° 56°
- Jul 77° 62°
- Aug 76° 62°
- Sep 70° 56°
- Oct 59° 45°
- Nov 46° 35°
- Dec 35° 26°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Port Hope each month?
July is the warmest month, with normal highs of 77°F; January the coldest, with normal lows of 19°F. The most precipitation falls in August (3.42 in), the least in February (1.40 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 30°F | 19°F | 24.5°F | 1.72 | 15 | <1 | 28 | 9 h 10 min |
| February | 31°F | 19°F | 25.0°F | 1.40 | 12 | <1 | 26 | 10 h 30 min |
| March | 39°F | 26°F | 32.4°F | 2.06 | 12 | <1 | 24 | 11 h 50 min |
| April | 50°F | 35°F | 42.7°F | 2.98 | 12 | <1 | 10 | 13 h 20 min |
| May | 62°F | 45°F | 53.3°F | 2.92 | 13 | <1 | 1 | 14 h 40 min |
| June | 71°F | 56°F | 63.5°F | 2.49 | 11 | 1 | <1 | 15 h 30 min |
| July | 77°F | 62°F | 69.4°F | 2.84 | 10 | 2 | <1 | 15 h 10 min |
| August | 76°F | 62°F | 68.9°F | 3.42 | 10 | 1 | <1 | 14 h |
| September | 70°F | 56°F | 62.8°F | 2.92 | 11 | <1 | <1 | 12 h 40 min |
| October | 59°F | 45°F | 51.8°F | 3.27 | 16 | <1 | 1 | 11 h 10 min |
| November | 46°F | 35°F | 40.3°F | 2.37 | 13 | <1 | 12 | 9 h 40 min |
| December | 35°F | 26°F | 30.5°F | 1.98 | 15 | <1 | 25 | 9 h |
| Year (annual) | 54°F | 40°F | 47.1°F | 30.37 | 148 | 4 | 126 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | −1°C | −7°C | −4.2°C | 44 mm |
| February | 0°C | −7°C | −3.9°C | 36 mm |
| March | 4°C | −3°C | 0.2°C | 52 mm |
| April | 10°C | 2°C | 5.9°C | 76 mm |
| May | 16°C | 7°C | 11.8°C | 74 mm |
| June | 22°C | 13°C | 17.5°C | 63 mm |
| July | 25°C | 16°C | 20.8°C | 72 mm |
| August | 24°C | 16°C | 20.5°C | 87 mm |
| September | 21°C | 13°C | 17.1°C | 74 mm |
| October | 15°C | 7°C | 11.0°C | 83 mm |
| November | 8°C | 1°C | 4.6°C | 60 mm |
| December | 2°C | −3°C | −0.8°C | 50 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Harbor Beach (15 miles away), gets 47 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USW00094898; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
When is the best weather to visit Port Hope?
Normal highs sit between 65°F and 85°F in June, July, August and September. Of those, July has the fewest days with rain (10).
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.
Source: NOAA NCEI 1991-2020 monthly normals, station USW00094898.
When is the last frost in Port Hope?
In Port Hope, the last spring frost (32°F) comes after April 28 in half of years and after May 14 in one year in ten; the first autumn frost comes before November 3 in half of years and before October 21 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- April 281 year in 10 after May 14; 9 in 10 after April 13
- First autumn frost, half of years before
- November 31 year in 10 before October 21; 9 in 10 before November 15
NOAA puts the median frost-free season at 187 days, and the season without a hard freeze (28°F) at 213 days.
A hard freeze (28°F) comes after April 15 in half of springs and before November 14 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Port Hope in zone 6a in ZIP code 48468, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Port Hope's NOAA station is in zone 6b: the coldest night of a typical year reaches 0°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
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USW00094898; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get in Port Hope?
In a normal year in Port Hope, 4 days a year reach 90°F, 126 nights fall to 32°F or colder and 148 days bring measurable precipitation.
- Days at 90°F or more
- 4a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 126a normal year
- Days that stay below freezing
- 57high of 32°F or less
- Days with 0.01 inch of precipitation
- 148a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USW00094898.
How sunny is Port Hope?
Over a year 69% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Port Hope, 3.6 kWh per square metre a day. July is the sunniest month (79%) and December the cloudiest (43%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 45% | 1.1 |
| February | 53% | 1.9 |
| March | 64% | 3.4 |
| April | 69% | 4.7 |
| May | 71% | 5.5 |
| June | 76% | 6.1 |
| July | 79% | 6.1 |
| August | 78% | 5.2 |
| September | 75% | 4.0 |
| October | 63% | 2.4 |
| November | 54% | 1.4 |
| December | 43% | 0.9 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How much heating and cooling does Port Hope need?
A normal year in Port Hope brings 6,942 heating degree days, 29% more than the median U.S. place (5,373), and 446 cooling degree days, 51% fewer than the median (908). Eight months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 2,331 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,257 | 0 |
| February | 1,121 | 0 |
| March | 1,012 | 0 |
| April | 669 | 1 |
| May | 376 | 15 |
| June | 120 | 75 |
| July | 21 | 156 |
| August | 17 | 137 |
| September | 123 | 55 |
| October | 416 | 8 |
| November | 741 | 0 |
| December | 1,070 | 0 |
| Year (annual) | 6,942 | 446 |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00094898. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
Has Port Hope been warmer than normal lately?
2025 averaged 47.5°F, 0.4°F above the 1991-2020 normal of 47.1°F. 4 of the 4 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 50.2°F | +3.1°F | 28.41 |
| 2022 | 48.0°F | +0.9°F | 24.32 |
| 2023 | 49.8°F | +2.6°F | 33.12 |
| 2025 | 47.5°F | +0.4°F | – |
Source: observed years: ACIS, station USW00094898. A year counts only with all twelve months complete.
How does Port Hope's climate compare?
Port Hope is warmer than 75 of the other 139 places with their own NOAA record in Michigan, and wetter than 14. Across the 7,247 U.S. stations with normals, its annual mean of 47.1°F is warmer than 28%.
In the Köppen classification computed from these normals, Port Hope is Dfb: continental, no dry season, warm summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
What do Port Hope's other NOAA stations record?
One more NOAA station keeps 1991-2020 normals in or near Port Hope. This page uses Port Hope; the other differs by site and elevation:
| Station | From this station | Elevation | Year | Jan low | Jul high | Precip. | Snow | Last frost |
|---|---|---|---|---|---|---|---|---|
| Port Hope station USC00206663 | 6 mi SE | 600 ft | 45.4°F | 16°F | 77°F | – | – | May 5 |
Source: NOAA NCEI 1991-2020 normals for each station. Last frost: the median last spring date of 32°F.
Questions about Port Hope's climate
What is the coldest month in Port Hope?
January, with a normal high of 30°F and a normal low of 19°F. The warmest is July (77°F by day, 62°F at night).
Does it snow in Port Hope?
Yes. NOAA publishes no 1991-2020 snowfall normal for Port Hope's NOAA station; the nearest record that keeps one, Harbor Beach (15 miles away), records 47 inches of snow in a normal year.
What is the rainiest month in Port Hope?
August, with 3.42 in of precipitation in a normal year; the driest is February with 1.40 in.
What plant hardiness zone is Port Hope in?
The USDA's 2023 map puts Port Hope in zone 6a in ZIP code 48468, the nearest ZIP area. By the same method at Port Hope's NOAA station, the coldest night of a typical year reaches 0°F (17 years, 1991-2020): zone 6b.
How late can frost come in Port Hope?
In half of years the last 32°F night comes after April 28; in one year in ten it comes after May 14. Waiting until May 14 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Michigan climateThe statewide normals and every place in the state
- Port Austin, MI9 miles from this station, 45.9°F a year
- Harbor Beach, MI15 miles from this station, 45.4°F a year
- Filion (5 mi NNW), MI16 miles from this station, 45.3°F a year
- Bad Axe, MI18 miles from this station, 46.4°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made