Harrisville, Michigan climate: Normal weather by month, frost dates and records
Harrisville's normal year runs from 14°F January nights to 74°F July afternoons, with 29.1 inches of precipitation and 52 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 6.0°C, January lows of −10°C, July highs of 23°C, 740 mm of precipitation a year.
- NOAA stationHarrisville (2 mi NNE)
- Station IDUSC00203628
- Location44.68°N 83.28°W
- Elevation585 ft (178 m)
- Population457
On October 23, the normal high in Harrisville is 51°F and the normal low 37°F, and the chance of measurable rain or snow is 49%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Harrisville.
- Jan 26° 14°
- Feb 28° 13°
- Mar 35° 21°
- Apr 46° 31°
- May 57° 42°
- Jun 67° 52°
- Jul 74° 58°
- Aug 74° 58°
- Sep 67° 50°
- Oct 54° 39°
- Nov 42° 30°
- Dec 32° 21°
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 Harrisville each month?
July is the warmest month, with normal highs of 74°F; January the coldest, with normal lows of 14°F. The most precipitation falls in July (3.38 in), the least in February (1.12 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 26°F | 14°F | 19.7°F | 1.38 | 14.4 | 12 | <1 | 30 | 9 h 10 min |
| February | 28°F | 13°F | 20.4°F | 1.12 | 12.3 | 9 | <1 | 27 | 10 h 20 min |
| March | 35°F | 21°F | 28.3°F | 1.63 | 8.0 | 9 | <1 | 27 | 11 h 50 min |
| April | 46°F | 31°F | 38.3°F | 3.06 | 4.2 | 11 | <1 | 15 | 13 h 30 min |
| May | 57°F | 42°F | 49.4°F | 3.23 | 0.0 | 12 | <1 | 2 | 14 h 50 min |
| June | 67°F | 52°F | 59.6°F | 3.13 | 0.0 | 12 | 1 | <1 | 15 h 30 min |
| July | 74°F | 58°F | 65.6°F | 3.38 | 0.0 | 11 | 1 | <1 | 15 h 20 min |
| August | 74°F | 58°F | 65.6°F | 3.18 | 0.0 | 10 | 1 | <1 | 14 h 10 min |
| September | 67°F | 50°F | 58.6°F | 2.80 | 0.0 | 11 | <1 | <1 | 12 h 40 min |
| October | 54°F | 39°F | 46.8°F | 2.68 | 0.0 | 16 | <1 | 5 | 11 h |
| November | 42°F | 30°F | 35.7°F | 1.89 | 2.6 | 13 | <1 | 17 | 9 h 40 min |
| December | 32°F | 21°F | 26.2°F | 1.66 | 10.9 | 12 | <1 | 28 | 8 h 50 min |
| Year (annual) | 50°F | 36°F | 42.8°F | 29.14 | 52.4 | 138 | 3 | 150 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | −3°C | −10°C | −6.8°C | 35 mm | 37 cm |
| February | −2°C | −10°C | −6.4°C | 28 mm | 31 cm |
| March | 2°C | −6°C | −2.1°C | 41 mm | 20 cm |
| April | 8°C | −1°C | 3.5°C | 78 mm | 11 cm |
| May | 14°C | 5°C | 9.7°C | 82 mm | 0 cm |
| June | 20°C | 11°C | 15.3°C | 80 mm | 0 cm |
| July | 23°C | 14°C | 18.7°C | 86 mm | 0 cm |
| August | 23°C | 14°C | 18.7°C | 81 mm | 0 cm |
| September | 19°C | 10°C | 14.8°C | 71 mm | 0 cm |
| October | 12°C | 4°C | 8.2°C | 68 mm | 0 cm |
| November | 5°C | −1°C | 2.1°C | 48 mm | 7 cm |
| December | 0°C | −6°C | −3.2°C | 42 mm | 28 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00203628; 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 Harrisville?
Normal highs sit between 65°F and 85°F in June, July, August and September. Of those, August 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 USC00203628.
When is the last frost in Harrisville?
In Harrisville, the last spring frost (32°F) comes after May 8 in half of years and after May 24 in one year in ten; the first autumn frost comes before October 16 in half of years and before October 2 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 81 year in 10 after May 24; 9 in 10 after April 26
- First autumn frost, half of years before
- October 161 year in 10 before October 2; 9 in 10 before October 30
NOAA puts the median frost-free season at 160 days, and the season without a hard freeze (28°F) at 183 days.
A hard freeze (28°F) comes after April 27 in half of springs and before October 29 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Harrisville in zone 5b in ZIP code 48740, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Harrisville's NOAA station is in zone 6a: the coldest night of a typical year reaches −7°F (22 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 USC00203628; 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 Harrisville?
In a normal year in Harrisville, 3 days a year reach 90°F, 150 nights fall to 32°F or colder and 138 days bring measurable precipitation.
- Days at 90°F or more
- 3a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 150a normal year
- Days that stay below freezing
- 61high of 32°F or less
- Days with 0.01 inch of precipitation
- 138a normal year
- Days with 1 inch of snow or more
- 16a normal year
The highest temperature in this station's record (since 1971) is 103°F, on August 7, 2001; the lowest is −22°F, on February 18, 1979.
The wettest calendar year on that record is 2006, with 40.88 in; the snowiest season is 2008–09, with 93.0 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00203628; records: ACIS (NOAA Regional Climate Centers), station USC00203628. Records use complete months only; a month missing more than three days is left out.
How sunny is Harrisville?
Over a year 70% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Harrisville, 3.6 kWh per square metre a day. July is the sunniest month (79%) and December the cloudiest (51%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 54% | 1.3 |
| February | 57% | 2.1 |
| March | 68% | 3.6 |
| April | 69% | 4.7 |
| May | 71% | 5.5 |
| June | 75% | 6.1 |
| July | 79% | 6.1 |
| August | 77% | 5.2 |
| September | 76% | 4.1 |
| October | 64% | 2.5 |
| November | 57% | 1.5 |
| December | 51% | 1.1 |
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 Harrisville need?
A normal year in Harrisville brings 8,233 heating degree days, 53% more than the median U.S. place (5,373), and 192 cooling degree days, 79% 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 1,682 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,403 | 0 |
| February | 1,247 | 0 |
| March | 1,138 | 0 |
| April | 803 | 0 |
| May | 486 | 3 |
| June | 187 | 25 |
| July | 58 | 76 |
| August | 51 | 70 |
| September | 211 | 17 |
| October | 565 | 1 |
| November | 881 | 0 |
| December | 1,204 | 0 |
| Year (annual) | 8,233 | 192 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00203628. 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 Harrisville been warmer than normal lately?
2025 averaged 43.3°F, 0.5°F above the 1991-2020 normal of 42.8°F. 4 of the 4 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 45.8°F | +3.0°F | 24.03 | 27.1 |
| 2023 | 45.3°F | +2.5°F | – | – |
| 2024 | 46.2°F | +3.4°F | – | – |
| 2025 | 43.3°F | +0.5°F | – | – |
Over 35 complete years from 1972 to 2025, the station's annual mean temperature rose at a fitted 6.3°F per century (+0.35°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00203628; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Harrisville's climate compare?
Harrisville is warmer than 23 of the other 139 places with their own NOAA record in Michigan, and wetter than 4. Across the 7,247 U.S. stations with normals, its annual mean of 42.8°F is warmer than 12%.
In the Köppen classification computed from these normals, Harrisville 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 Harrisville share this climate record?
3 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.
- Hubbard Lake, MI976 people · 17 mi NW
- Lost Lake Woods, MI407 people · 11 mi NW
- Lincoln, MI301 people · 6 mi W
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 Harrisville's climate
What is the coldest month in Harrisville?
January, with a normal high of 26°F and a normal low of 14°F. The warmest is July (74°F by day, 58°F at night).
Does it snow in Harrisville?
Yes: 52 inches in a normal year, falling on 36 days with 0.1 inch or more, the most in January (14.4 inches).
What is the rainiest month in Harrisville?
July, with 3.38 in of precipitation in a normal year; the driest is February with 1.12 in.
What plant hardiness zone is Harrisville in?
The USDA's 2023 map puts Harrisville in zone 5b in ZIP code 48740, the nearest ZIP area. By the same method at Harrisville's NOAA station, the coldest night of a typical year reaches −7°F (22 years, 1991-2020): zone 6a.
How late can frost come in Harrisville?
In half of years the last 32°F night comes after May 8; 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
- Glennie (2 mi SE), MI23 miles from this station, 42.9°F a year
- Hale Loud Dam, MI27 miles from this station, 44.5°F a year
- East Tawas, MI30 miles from this station, 45.6°F a year
- Alpena, MI30 miles from this station, 44.3°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made