Spooner, Wisconsin climate: Normal weather by month, frost dates and records
Spooner's normal year runs from 1°F January nights to 80°F July afternoons, with 31.6 inches of precipitation and 56 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 5.7°C, January lows of −17°C, July highs of 27°C, 803 mm of precipitation a year.
- NOAA stationSpooner Agricultural Reservoir Station
- Station IDUSC00478027
- Location45.82°N 91.88°W
- Elevation1,100 ft (335 m)
- Population2,494
On October 14, the normal high in Spooner is 57°F and the normal low 37°F, and the chance of measurable rain or snow is 33%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Spooner.
- Jan 21° 1°
- Feb 26° 4°
- Mar 40° 18°
- Apr 54° 31°
- May 67° 44°
- Jun 76° 54°
- Jul 80° 58°
- Aug 78° 56°
- Sep 70° 48°
- Oct 56° 36°
- Nov 39° 23°
- Dec 26° 9°
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 Spooner each month?
July is the warmest month, with normal highs of 80°F; January the coldest, with normal lows of 1°F. The most precipitation falls in June (4.23 in), the least in January (0.79 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 21°F | 1°F | 10.8°F | 0.79 | 11.3 | 8 | <1 | 31 | 9 h |
| February | 26°F | 4°F | 15.4°F | 0.80 | 9.6 | 6 | <1 | 27 | 10 h 20 min |
| March | 40°F | 18°F | 28.6°F | 1.43 | 9.4 | 7 | <1 | 27 | 11 h 50 min |
| April | 54°F | 31°F | 42.4°F | 2.77 | 4.8 | 10 | <1 | 16 | 13 h 30 min |
| May | 67°F | 44°F | 55.2°F | 4.08 | 0.4 | 12 | <1 | 3 | 14 h 50 min |
| June | 76°F | 54°F | 64.9°F | 4.23 | 0.0 | 12 | 1 | <1 | 15 h 40 min |
| July | 80°F | 58°F | 69.0°F | 3.99 | 0.0 | 11 | 2 | <1 | 15 h 20 min |
| August | 78°F | 56°F | 67.1°F | 3.90 | 0.0 | 10 | 1 | <1 | 14 h 10 min |
| September | 70°F | 48°F | 58.8°F | 3.61 | 0.0 | 10 | <1 | 2 | 12 h 40 min |
| October | 56°F | 36°F | 45.8°F | 3.16 | 0.8 | 10 | <1 | 11 | 11 h |
| November | 39°F | 23°F | 30.9°F | 1.66 | 6.2 | 7 | <1 | 24 | 9 h 30 min |
| December | 26°F | 9°F | 17.5°F | 1.19 | 13.2 | 9 | <1 | 30 | 8 h 40 min |
| Year (annual) | 53°F | 32°F | 42.2°F | 31.61 | 55.7 | 112 | 5 | 171 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | −6°C | −17°C | −11.8°C | 20 mm | 29 cm |
| February | −3°C | −15°C | −9.2°C | 20 mm | 24 cm |
| March | 4°C | −8°C | −1.9°C | 36 mm | 24 cm |
| April | 12°C | −1°C | 5.8°C | 70 mm | 12 cm |
| May | 19°C | 6°C | 12.9°C | 104 mm | 1 cm |
| June | 24°C | 12°C | 18.3°C | 107 mm | 0 cm |
| July | 27°C | 14°C | 20.6°C | 101 mm | 0 cm |
| August | 26°C | 13°C | 19.5°C | 99 mm | 0 cm |
| September | 21°C | 9°C | 14.9°C | 92 mm | 0 cm |
| October | 13°C | 2°C | 7.7°C | 80 mm | 2 cm |
| November | 4°C | −5°C | −0.6°C | 42 mm | 16 cm |
| December | −4°C | −13°C | −8.1°C | 30 mm | 34 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00478027; 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 Spooner?
Normal highs sit between 65°F and 85°F in May, 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 USC00478027.
When is the last frost in Spooner?
In Spooner, the last spring frost (32°F) comes after May 14 in half of years and after May 29 in one year in ten; the first autumn frost comes before September 28 in half of years and before September 14 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 141 year in 10 after May 29; 9 in 10 after April 30
- First autumn frost, half of years before
- September 281 year in 10 before September 14; 9 in 10 before October 11
NOAA puts the median frost-free season at 135 days, and the season without a hard freeze (28°F) at 156 days.
A hard freeze (28°F) comes after May 2 in half of springs and before October 7 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Spooner in zone 4a in ZIP code 54801, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Spooner's NOAA station is in zone 4a: the coldest night of a typical year reaches −26°F (30 complete years).
Frost dates for every NOAA station in Wisconsin · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00478027; 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 Spooner?
In a normal year in Spooner, 5 days a year reach 90°F, 171 nights fall to 32°F or colder and 112 days bring measurable precipitation.
- Days at 90°F or more
- 5a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 171a normal year
- Days that stay below freezing
- 80high of 32°F or less
- Days with 0.01 inch of precipitation
- 112a normal year
- Days with 1 inch of snow or more
- 19a normal year
The highest temperature in this station's record (since 1894) is 110°F, on July 13, 1936; the lowest is −46°F, on February 5, 1895.
The wettest calendar year on that record is 1991, with 45.28 in; the snowiest season is 2022–23, with 96.0 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00478027; records: ACIS (NOAA Regional Climate Centers), station USC00478027. Records use complete months only; a month missing more than three days is left out.
How sunny is Spooner?
Over a year 72% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Spooner, 3.7 kWh per square metre a day. July is the sunniest month (78%) and December the cloudiest (57%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 70% | 1.7 |
| February | 76% | 2.8 |
| March | 73% | 3.9 |
| April | 68% | 4.6 |
| May | 68% | 5.4 |
| June | 73% | 6.0 |
| July | 78% | 6.2 |
| August | 76% | 5.2 |
| September | 74% | 4.0 |
| October | 66% | 2.5 |
| November | 62% | 1.6 |
| December | 57% | 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 Spooner need?
A normal year in Spooner brings 8,673 heating degree days, 61% more than the median U.S. place (5,373), and 400 cooling degree days, 56% 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 2,182 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,680 | 0 |
| February | 1,389 | 0 |
| March | 1,129 | 0 |
| April | 681 | 1 |
| May | 324 | 19 |
| June | 83 | 80 |
| July | 26 | 151 |
| August | 45 | 112 |
| September | 222 | 35 |
| October | 599 | 2 |
| November | 1,023 | 0 |
| December | 1,474 | 0 |
| Year (annual) | 8,673 | 400 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00478027. 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 Spooner been warmer than normal lately?
2025 averaged 43.5°F, 1.3°F above the 1991-2020 normal of 42.2°F. 4 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 44.2°F | +2.0°F | 26.51 | 41.9 |
| 2022 | 40.5°F | −1.7°F | 29.11 | 77.5 |
| 2023 | 44.6°F | +2.4°F | 28.22 | 60.2 |
| 2024 | 46.1°F | +3.9°F | 28.63 | – |
| 2025 | 43.5°F | +1.3°F | 29.16 | – |
Over 109 complete years from 1895 to 2025, the station's annual mean temperature rose at a fitted 2.9°F per century (+0.16°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00478027; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Spooner's climate compare?
Spooner is warmer than 30 of the other 164 places with their own NOAA record in Wisconsin, and wetter than 20. Across the 7,247 U.S. stations with normals, its annual mean of 42.2°F is warmer than 10%.
In the Köppen classification computed from these normals, Spooner 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 Spooner 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.
- Shell Lake, WI1,393 people · 7 mi S
- Trego, WI130 people · 6 mi N
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 Spooner's climate
What is the coldest month in Spooner?
January, with a normal high of 21°F and a normal low of 1°F. The warmest is July (80°F by day, 58°F at night).
Does it snow in Spooner?
Yes: 56 inches in a normal year, falling on 34 days with 0.1 inch or more, the most in December (13.2 inches).
What is the rainiest month in Spooner?
June, with 4.23 in of precipitation in a normal year; the driest is January with 0.79 in.
What plant hardiness zone is Spooner in?
The USDA's 2023 map puts Spooner in zone 4a in ZIP code 54801, the nearest ZIP area. By the same method at Spooner's NOAA station, the coldest night of a typical year reaches −26°F (30 years, 1991-2020): zone 4a.
How late can frost come in Spooner?
In half of years the last 32°F night comes after May 14; in one year in ten it comes after May 29. Waiting until May 29 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Wisconsin climateThe statewide normals and every place in the state
- Minong, WI17 miles from this station, 42.8°F a year
- Couderay, WI20 miles from this station, 41.4°F a year
- Cumberland, WI21 miles from this station, 41.3°F a year
- Hayward, WI25 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