Boscobel, Wisconsin climate: Normal weather by month, frost dates and records
Boscobel's normal year runs from 10°F January nights to 84°F July afternoons, with 33.9 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 8.9°C, January lows of −12°C, July highs of 29°C, 862 mm of precipitation a year.
- NOAA stationBoscobel Airport
- Station IDUSW00094994
- Location43.16°N 90.68°W
- Elevation672 ft (205 m)
- From the center2 miles
- Population3,265
On October 8, the normal high in Boscobel is 66°F and the normal low 41°F, and the chance of measurable rain or snow is 38%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Boscobel.
- Jan 29° 10°
- Feb 34° 14°
- Mar 47° 25°
- Apr 61° 36°
- May 72° 47°
- Jun 81° 57°
- Jul 84° 61°
- Aug 83° 59°
- Sep 76° 51°
- Oct 63° 38°
- Nov 47° 28°
- Dec 34° 17°
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 Boscobel each month?
July is the warmest month, with normal highs of 84°F; January the coldest, with normal lows of 10°F. The most precipitation falls in June (5.15 in), the least in February (0.96 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 29°F | 10°F | 19.5°F | 0.98 | 8 | <1 | 30 | 9 h 20 min |
| February | 34°F | 14°F | 23.7°F | 0.96 | 8 | <1 | 27 | 10 h 30 min |
| March | 47°F | 25°F | 36.0°F | 1.91 | 9 | <1 | 24 | 11 h 50 min |
| April | 61°F | 36°F | 48.2°F | 3.64 | 12 | <1 | 11 | 13 h 20 min |
| May | 72°F | 47°F | 59.6°F | 4.35 | 14 | 1 | 2 | 14 h 40 min |
| June | 81°F | 57°F | 69.1°F | 5.15 | 15 | 3 | <1 | 15 h 20 min |
| July | 84°F | 61°F | 72.8°F | 3.84 | 12 | 8 | <1 | 15 h 10 min |
| August | 83°F | 59°F | 71.2°F | 4.07 | 14 | 4 | <1 | 14 h |
| September | 76°F | 51°F | 63.2°F | 3.37 | 15 | 2 | 1 | 12 h 30 min |
| October | 63°F | 38°F | 50.4°F | 2.48 | 11 | <1 | 10 | 11 h 10 min |
| November | 47°F | 28°F | 37.3°F | 1.87 | 8 | <1 | 21 | 9 h 50 min |
| December | 34°F | 17°F | 25.6°F | 1.32 | 8 | <1 | 28 | 9 h |
| Year (annual) | 59°F | 37°F | 48.0°F | 33.94 | 133 | 19 | 152 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | −2°C | −12°C | −6.9°C | 25 mm |
| February | 1°C | −10°C | −4.6°C | 24 mm |
| March | 8°C | −4°C | 2.2°C | 49 mm |
| April | 16°C | 2°C | 9.0°C | 92 mm |
| May | 22°C | 8°C | 15.3°C | 110 mm |
| June | 27°C | 14°C | 20.6°C | 131 mm |
| July | 29°C | 16°C | 22.7°C | 98 mm |
| August | 28°C | 15°C | 21.8°C | 103 mm |
| September | 24°C | 10°C | 17.3°C | 86 mm |
| October | 17°C | 3°C | 10.2°C | 63 mm |
| November | 8°C | −2°C | 2.9°C | 47 mm |
| December | 1°C | −8°C | −3.6°C | 34 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Steuben (8 miles away), gets 36 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USW00094994; 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 Boscobel?
Normal highs sit between 65°F and 85°F in May, June, July, August and September. Of those, July has the fewest days with rain (12).
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 USW00094994.
When is the last frost in Boscobel?
In Boscobel, the last spring frost (32°F) comes after May 3 in half of years and after May 18 in one year in ten; the first autumn frost comes before October 7 in half of years and before September 25 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 31 year in 10 after May 18; 9 in 10 after April 19
- First autumn frost, half of years before
- October 71 year in 10 before September 25; 9 in 10 before October 20
NOAA puts the median frost-free season at 155 days, and the season without a hard freeze (28°F) at 177 days.
A hard freeze (28°F) comes after April 22 in half of springs and before October 17 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Boscobel in zone 5a in ZIP code 53805, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Boscobel's NOAA station is in zone 4b: the coldest night of a typical year reaches −20°F (21 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 Wisconsin · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USW00094994; 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 Boscobel?
In a normal year in Boscobel, 19 days a year reach 90°F (1 of them 100°F or more), 152 nights fall to 32°F or colder and 133 days bring measurable precipitation.
- Days at 90°F or more
- 19a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 152a normal year
- Days that stay below freezing
- 50high of 32°F or less
- Days with 0.01 inch of precipitation
- 133a normal year
The highest temperature in this station's record (since 1999) is 105°F, on July 6, 2012; the lowest is −36°F, on January 31, 2019.
The wettest calendar year on that record is 2019, with 48.05 in.
Source: NOAA NCEI 1991-2020 annual normals, station USW00094994; records: ACIS (NOAA Regional Climate Centers), station USW00094994. Records use complete months only; a month missing more than three days is left out.
How sunny is Boscobel?
Over a year 73% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Boscobel, 3.9 kWh per square metre a day. July is the sunniest month (80%) and December the cloudiest (62%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 69% | 1.8 |
| February | 75% | 2.9 |
| March | 72% | 3.9 |
| April | 67% | 4.6 |
| May | 70% | 5.5 |
| June | 74% | 6.1 |
| July | 80% | 6.2 |
| August | 78% | 5.3 |
| September | 77% | 4.2 |
| October | 69% | 2.8 |
| November | 67% | 1.8 |
| December | 62% | 1.4 |
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 Boscobel need?
A normal year in Boscobel brings 6,877 heating degree days, 28% more than the median U.S. place (5,373), and 738 cooling degree days, 19% fewer than the median (908). Seven months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 2,891 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,412 | 0 |
| February | 1,155 | 0 |
| March | 901 | 2 |
| April | 508 | 4 |
| May | 212 | 43 |
| June | 34 | 155 |
| July | 6 | 248 |
| August | 12 | 204 |
| September | 128 | 74 |
| October | 461 | 8 |
| November | 830 | 0 |
| December | 1,220 | 0 |
| Year (annual) | 6,877 | 738 |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00094994. 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 Boscobel been warmer than normal lately?
2025 averaged 48.3°F, 0.3°F above the 1991-2020 normal of 48.0°F. 3 of the 4 complete years since 2022 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2022 | 46.8°F | −1.2°F | – |
| 2023 | 50.7°F | +2.7°F | – |
| 2024 | 51.5°F | +3.5°F | 41.69 |
| 2025 | 48.3°F | +0.3°F | 32.54 |
Source: observed years: ACIS, station USW00094994. A year counts only with all twelve months complete.
How does Boscobel's climate compare?
Boscobel is warmer than 155 of the other 164 places with their own NOAA record in Wisconsin, and wetter than 61. Across the 7,247 U.S. stations with normals, its annual mean of 48.0°F is warmer than 32%.
In the Köppen classification computed from these normals, Boscobel is Dfa: continental, no dry season, hot 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 Boscobel 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.
- Fennimore, WI2,775 people · 12 mi S
- Blue River, WI453 people · 6 mi E
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 Boscobel's climate
What is the coldest month in Boscobel?
January, with a normal high of 29°F and a normal low of 10°F. The warmest is July (84°F by day, 61°F at night).
Does it snow in Boscobel?
Yes. NOAA publishes no 1991-2020 snowfall normal for Boscobel's NOAA station; the nearest record that keeps one, Steuben (8 miles away), records 36 inches of snow in a normal year.
What is the rainiest month in Boscobel?
June, with 5.15 in of precipitation in a normal year; the driest is February with 0.96 in.
What plant hardiness zone is Boscobel in?
The USDA's 2023 map puts Boscobel in zone 5a in ZIP code 53805, the nearest ZIP area. By the same method at Boscobel's NOAA station, the coldest night of a typical year reaches −20°F (21 years, 1991-2020): zone 4b.
How late can frost come in Boscobel?
In half of years the last 32°F night comes after May 3; in one year in ten it comes after May 18. Waiting until May 18 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Wisconsin climateThe statewide normals and every place in the state
- Steuben, WI8 miles from this station, 46.9°F a year
- Gays Mills, WI14 miles from this station, 46.5°F a year
- Richland Center, WI19 miles from this station, 45.8°F a year
- Lynxville, WI22 miles from this station, 47.4°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made