Port Wing, Wisconsin climate: Normal weather by month, frost dates and records
Port Wing's normal year runs from 6°F January nights to 77°F July afternoons. (NOAA 1991-2020 normals)
In metric: a yearly mean of 5.1°C, January lows of −14°C, July highs of 25°C.
- NOAA stationPort Wing
- Station IDUSC00476772
- Location46.78°N 91.39°W
- Elevation651 ft (198 m)
- From the centerunder 1 mile
- Population (census place)134
On October 23, the normal high in Port Wing is 51°F and the normal low 34°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Port Wing.
- Jan 21° 6°
- Feb 26° 8°
- Mar 36° 19°
- Apr 48° 29°
- May 61° 39°
- Jun 70° 47°
- Jul 77° 56°
- Aug 76° 56°
- Sep 68° 49°
- Oct 54° 37°
- Nov 39° 26°
- Dec 27° 14°
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 Wing each month?
July is the warmest month, with normal highs of 77°F; January the coldest, with normal lows of 6°F.
| Month | High | Low | Mean | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|
| January | 21°F | 6°F | 13.8°F | – | <1 | 31 | 9 h |
| February | 26°F | 8°F | 16.8°F | – | <1 | 27 | 10 h 20 min |
| March | 36°F | 19°F | 27.6°F | – | <1 | 29 | 11 h 50 min |
| April | 48°F | 29°F | 38.6°F | – | <1 | 19 | 13 h 30 min |
| May | 61°F | 39°F | 49.8°F | – | <1 | 6 | 15 h |
| June | 70°F | 47°F | 58.6°F | – | <1 | 1 | 15 h 50 min |
| July | 77°F | 56°F | 66.2°F | – | 2 | <1 | 15 h 30 min |
| August | 76°F | 56°F | 65.9°F | – | 1 | <1 | 14 h 20 min |
| September | 68°F | 49°F | 58.1°F | – | <1 | 1 | 12 h 40 min |
| October | 54°F | 37°F | 45.2°F | – | <1 | 9 | 11 h |
| November | 39°F | 26°F | 32.5°F | – | <1 | 24 | 9 h 30 min |
| December | 27°F | 14°F | 20.6°F | – | <1 | 30 | 8 h 30 min |
| Year (annual) | 50°F | 32°F | 41.1°F | – | 3 | 177 |
The same normals in °C and millimetres
| Month | High | Low | Mean |
|---|---|---|---|
| January | −6°C | −14°C | −10.1°C |
| February | −4°C | −13°C | −8.4°C |
| March | 2°C | −7°C | −2.4°C |
| April | 9°C | −1°C | 3.7°C |
| May | 16°C | 4°C | 9.9°C |
| June | 21°C | 8°C | 14.8°C |
| July | 25°C | 13°C | 19.0°C |
| August | 24°C | 13°C | 18.8°C |
| September | 20°C | 9°C | 14.5°C |
| October | 12°C | 3°C | 7.3°C |
| November | 4°C | −3°C | 0.3°C |
| December | −3°C | −10°C | −6.3°C |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Two Harbors (22 miles away), gets 61 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00476772; 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 Wing?
Normal highs sit between 65°F and 85°F in June, July, August and September.
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 USC00476772.
When is the last frost in Port Wing?
In Port Wing, the last spring frost (32°F) comes after May 31 in half of years and after June 13 in one year in ten; the first autumn frost comes before October 2 in half of years and before September 17 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 311 year in 10 after June 13; 9 in 10 after May 16
- First autumn frost, half of years before
- October 21 year in 10 before September 17; 9 in 10 before October 14
NOAA puts the median frost-free season at 123 days, and the season without a hard freeze (28°F) at 148 days.
A hard freeze (28°F) comes after May 18 in half of springs and before October 13 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Port Wing in zone 5a in ZIP code 54865, the nearest ZIP area.
Frost dates for every NOAA station in Wisconsin · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00476772; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. 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 Wing?
In a normal year in Port Wing, 3 days a year reach 90°F and 177 nights fall to 32°F or colder.
- 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
- 177a normal year
- Days that stay below freezing
- 87high of 32°F or less
Source: NOAA NCEI 1991-2020 annual normals, station USC00476772.
How sunny is Port Wing?
Over a year 69% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Port Wing, 3.6 kWh per square metre a day. July is the sunniest month (78%) and December the cloudiest (52%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 59% | 1.3 |
| February | 66% | 2.3 |
| March | 68% | 3.5 |
| April | 67% | 4.5 |
| May | 68% | 5.3 |
| June | 72% | 5.9 |
| July | 78% | 6.2 |
| August | 76% | 5.1 |
| September | 72% | 3.8 |
| October | 63% | 2.4 |
| November | 58% | 1.4 |
| December | 52% | 1.0 |
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 Wing need?
A normal year in Port Wing brings 8,906 heating degree days, 66% more than the median U.S. place (5,373), and 248 cooling degree days, 73% 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 1,677 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,587 | 0 |
| February | 1,351 | 0 |
| March | 1,160 | 0 |
| April | 791 | 0 |
| May | 475 | 3 |
| June | 215 | 23 |
| July | 66 | 103 |
| August | 62 | 90 |
| September | 234 | 27 |
| October | 617 | 1 |
| November | 975 | 0 |
| December | 1,375 | 0 |
| Year (annual) | 8,906 | 248 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00476772. 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.
How does Port Wing's climate compare?
Port Wing is warmer than 14 of the other 164 places with their own NOAA record in Wisconsin. Across the 7,247 U.S. stations with normals, its annual mean of 41.1°F is warmer than 8%.
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers.
Which places near Port Wing share this climate record?
Herbster has no NOAA station with 1991-2020 normals of its 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.
- Herbster, WI109 people · 8 mi NE
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 Port Wing's climate
What is the coldest month in Port Wing?
January, with a normal high of 21°F and a normal low of 6°F. The warmest is July (77°F by day, 56°F at night).
Does it snow in Port Wing?
Yes. NOAA publishes no 1991-2020 snowfall normal for Port Wing's NOAA station; the nearest record that keeps one, Two Harbors (22 miles away), records 61 inches of snow in a normal year.
What plant hardiness zone is Port Wing in?
The USDA's 2023 map puts Port Wing in zone 5a in ZIP code 54865, the nearest ZIP area.
How late can frost come in Port Wing?
In half of years the last 32°F night comes after May 31; in one year in ten it comes after June 13. Waiting until June 13 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Wisconsin climateThe statewide normals and every place in the state
- Brule, WI19 miles from this station, 40.6°F a year
- Two Harbors, MN22 miles from this station, 41.3°F a year
- Bayfield, WI25 miles from this station, 41.0°F a year
- Ashland, WI27 miles from this station, 41.5°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made