Northport, Michigan climate: Normal weather by month, frost dates and records
Northport's normal year runs from 18°F January nights to 75°F July afternoons, with 32.9 inches of precipitation and 91 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 7.4°C, January lows of −8°C, July highs of 24°C, 834 mm of precipitation a year.
- NOAA stationNorthport (2 mi W)
- Station IDUSC00206007
- Location45.13°N 85.65°W
- Elevation746 ft (227 m)
- From the center1 miles
- Population499
On October 23, the normal high in Northport is 53°F and the normal low 40°F, and the chance of measurable rain or snow is 51%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Northport.
- Jan 29° 18°
- Feb 30° 17°
- Mar 38° 23°
- Apr 50° 33°
- May 62° 43°
- Jun 71° 53°
- Jul 75° 59°
- Aug 75° 59°
- Sep 69° 52°
- Oct 56° 42°
- Nov 44° 33°
- Dec 34° 24°
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 Northport each month?
July is the warmest month, with normal highs of 75°F; January the coldest, with normal lows of 18°F. The most precipitation falls in October (4.04 in), the least in February (1.51 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 29°F | 18°F | 23.4°F | 2.30 | 26.3 | 18 | <1 | 29 | 9 h 10 min |
| February | 30°F | 17°F | 23.5°F | 1.51 | 19.0 | 14 | <1 | 27 | 10 h 20 min |
| March | 38°F | 23°F | 30.5°F | 1.99 | 12.6 | 11 | <1 | 27 | 11 h 50 min |
| April | 50°F | 33°F | 41.1°F | 2.89 | 5.9 | 12 | <1 | 16 | 13 h 30 min |
| May | 62°F | 43°F | 52.2°F | 2.86 | 0.1 | 13 | <1 | 3 | 14 h 50 min |
| June | 71°F | 53°F | 61.7°F | 2.97 | 0.0 | 10 | <1 | <1 | 15 h 40 min |
| July | 75°F | 59°F | 67.1°F | 2.69 | 0.0 | 10 | <1 | <1 | 15 h 20 min |
| August | 75°F | 59°F | 67.0°F | 2.73 | 0.0 | 10 | <1 | <1 | 14 h 10 min |
| September | 69°F | 52°F | 60.5°F | 3.47 | 0.0 | 12 | <1 | <1 | 12 h 40 min |
| October | 56°F | 42°F | 49.3°F | 4.04 | 0.1 | 15 | <1 | 2 | 11 h |
| November | 44°F | 33°F | 38.7°F | 3.11 | 6.2 | 16 | <1 | 14 | 9 h 40 min |
| December | 34°F | 24°F | 28.8°F | 2.29 | 21.2 | 17 | <1 | 27 | 8 h 50 min |
| Year (annual) | 53°F | 38°F | 45.3°F | 32.85 | 91.4 | 157 | 1 | 144 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | −2°C | −8°C | −4.8°C | 58 mm | 67 cm |
| February | −1°C | −8°C | −4.7°C | 38 mm | 48 cm |
| March | 4°C | −5°C | −0.8°C | 51 mm | 32 cm |
| April | 10°C | 0°C | 5.1°C | 73 mm | 15 cm |
| May | 17°C | 6°C | 11.2°C | 73 mm | 0 cm |
| June | 22°C | 11°C | 16.5°C | 75 mm | 0 cm |
| July | 24°C | 15°C | 19.5°C | 68 mm | 0 cm |
| August | 24°C | 15°C | 19.4°C | 69 mm | 0 cm |
| September | 20°C | 11°C | 15.8°C | 88 mm | 0 cm |
| October | 13°C | 6°C | 9.6°C | 103 mm | 0 cm |
| November | 7°C | 1°C | 3.7°C | 79 mm | 16 cm |
| December | 1°C | −5°C | −1.8°C | 58 mm | 54 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00206007; 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 Northport?
Normal highs sit between 65°F and 85°F in June, July, August and September. Of those, June 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 USC00206007.
When is the last frost in Northport?
In Northport, the last spring frost (32°F) comes after May 9 in half of years and after May 24 in one year in ten; the first autumn frost comes before October 26 in half of years and before October 11 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
- May 91 year in 10 after May 24; 9 in 10 after April 24
- First autumn frost, half of years before
- October 261 year in 10 before October 11; 9 in 10 before November 10
NOAA puts the median frost-free season at 169 days, and the season without a hard freeze (28°F) at 194 days.
A hard freeze (28°F) comes after April 27 in half of springs and before November 8 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Northport in zone 6b in ZIP code 49670, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Northport's NOAA station is in zone 6b: the coldest night of a typical year reaches −1°F (16 complete years).
Frost dates for every NOAA station in Michigan · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00206007; 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 Northport?
In a normal year in Northport, 1 day a year reaches 90°F, 144 nights fall to 32°F or colder and 157 days bring measurable precipitation.
- Days at 90°F or more
- 1a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 144a normal year
- Days that stay below freezing
- 65high of 32°F or less
- Days with 0.01 inch of precipitation
- 157a normal year
- Days with 1 inch of snow or more
- 33a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00206007.
How sunny is Northport?
Over a year 69% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Northport, 3.5 kWh per square metre a day. July is the sunniest month (79%) and December the cloudiest (48%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 51% | 1.2 |
| February | 58% | 2.0 |
| March | 67% | 3.4 |
| April | 68% | 4.6 |
| May | 71% | 5.5 |
| June | 74% | 6.1 |
| July | 79% | 6.1 |
| August | 78% | 5.2 |
| September | 74% | 3.9 |
| October | 61% | 2.3 |
| November | 53% | 1.3 |
| December | 48% | 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 Northport need?
A normal year in Northport brings 7,442 heating degree days, 39% more than the median U.S. place (5,373), and 302 cooling degree days, 67% 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 2,017 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,290 | 0 |
| February | 1,162 | 0 |
| March | 1,072 | 1 |
| April | 718 | 1 |
| May | 406 | 9 |
| June | 143 | 45 |
| July | 42 | 108 |
| August | 37 | 97 |
| September | 171 | 38 |
| October | 492 | 3 |
| November | 791 | 0 |
| December | 1,121 | 0 |
| Year (annual) | 7,442 | 302 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00206007. 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 Northport been warmer than normal lately?
2024 averaged 49.1°F, 3.8°F above the 1991-2020 normal of 45.3°F. 3 of the 4 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 47.6°F | +2.3°F | 32.64 | 55.3 |
| 2022 | 45.3°F | at normal | 36.32 | 103.7 |
| 2023 | 47.4°F | +2.1°F | 32.54 | 53.9 |
| 2024 | 49.1°F | +3.8°F | 34.48 | 67.4 |
Source: observed years: ACIS, station USC00206007. A year counts only with all twelve months complete.
How does Northport's climate compare?
Northport is warmer than 46 of the other 139 places with their own NOAA record in Michigan, and wetter than 33. Across the 7,247 U.S. stations with normals, its annual mean of 45.3°F is warmer than 21%.
In the Köppen classification computed from these normals, Northport 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.
Which places near Northport share this climate record?
2 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.
- Leland, MI393 people · 9 mi SW
- Omena, MI240 people · 5 mi SE
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Northport's climate
What is the coldest month in Northport?
January, with a normal high of 29°F and a normal low of 18°F. The warmest is July (75°F by day, 59°F at night).
Does it snow in Northport?
Yes: 91 inches in a normal year, falling on 60 days with 0.1 inch or more, the most in January (26.3 inches).
What is the rainiest month in Northport?
October, with 4.04 in of precipitation in a normal year; the driest is February with 1.51 in.
What plant hardiness zone is Northport in?
The USDA's 2023 map puts Northport in zone 6b in ZIP code 49670, the nearest ZIP area. By the same method at Northport's NOAA station, the coldest night of a typical year reaches −1°F (16 years, 1991-2020): zone 6b.
How late can frost come in Northport?
In half of years the last 32°F night comes after May 9; in one year in ten it comes after May 24. Waiting until May 24 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Michigan climateThe statewide normals and every place in the state
- Old Mission (3 mi SSW), MI16 miles from this station, 46.2°F a year
- NW Michigan Research Farm, MI17 miles from this station, 46.6°F a year
- Maple City, MI21 miles from this station, 45.7°F a year
- Charlevoix, MI22 miles from this station, 45.5°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made