Blair, Wisconsin climate: Normal weather by month, frost dates and records
Blair's normal year runs from 4°F January nights to 81°F July afternoons, with 35.6 inches of precipitation and 41 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 6.7°C, January lows of −15°C, July highs of 27°C, 904 mm of precipitation a year.
- NOAA stationBlair
- Station IDUSC00470882
- Location44.29°N 91.23°W
- Elevation855 ft (261 m)
- Population1,284
On October 23, the normal high in Blair is 55°F and the normal low 32°F, and the chance of measurable rain or snow is 25%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Blair.
- Jan 24° 4°
- Feb 29° 8°
- Mar 41° 21°
- Apr 56° 32°
- May 68° 45°
- Jun 78° 55°
- Jul 81° 59°
- Aug 79° 56°
- Sep 72° 48°
- Oct 58° 35°
- Nov 42° 24°
- Dec 29° 12°
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 Blair each month?
July is the warmest month, with normal highs of 81°F; January the coldest, with normal lows of 4°F. The most precipitation falls in June (5.04 in), the least in January (1.01 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 24°F | 4°F | 14.0°F | 1.01 | 10.0 | 8 | <1 | 31 | 9 h 10 min |
| February | 29°F | 8°F | 18.8°F | 1.21 | 8.5 | 7 | <1 | 27 | 10 h 30 min |
| March | 41°F | 21°F | 31.0°F | 1.66 | 8.9 | 8 | <1 | 27 | 11 h 50 min |
| April | 56°F | 32°F | 43.9°F | 3.31 | 2.5 | 10 | <1 | 17 | 13 h 20 min |
| May | 68°F | 45°F | 56.2°F | 4.76 | 0.0 | 12 | <1 | 4 | 14 h 40 min |
| June | 78°F | 55°F | 66.3°F | 5.04 | 0.0 | 12 | 2 | <1 | 15 h 30 min |
| July | 81°F | 59°F | 70.0°F | 4.44 | 0.0 | 10 | 4 | <1 | 15 h 10 min |
| August | 79°F | 56°F | 67.8°F | 4.64 | 0.0 | 10 | 2 | <1 | 14 h 10 min |
| September | 72°F | 48°F | 59.9°F | 4.07 | 0.0 | 10 | 1 | 2 | 12 h 40 min |
| October | 58°F | 35°F | 46.3°F | 2.51 | 0.2 | 8 | <1 | 15 | 11 h |
| November | 42°F | 24°F | 33.1°F | 1.78 | 2.2 | 7 | <1 | 25 | 9 h 40 min |
| December | 29°F | 12°F | 20.7°F | 1.18 | 8.8 | 8 | <1 | 30 | 8 h 50 min |
| Year (annual) | 55°F | 33°F | 44.0°F | 35.61 | 41.1 | 110 | 8 | 177 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | −4°C | −15°C | −10.0°C | 26 mm | 25 cm |
| February | −1°C | −13°C | −7.3°C | 31 mm | 22 cm |
| March | 5°C | −6°C | −0.6°C | 42 mm | 23 cm |
| April | 13°C | 0°C | 6.6°C | 84 mm | 6 cm |
| May | 20°C | 7°C | 13.4°C | 121 mm | 0 cm |
| June | 25°C | 13°C | 19.1°C | 128 mm | 0 cm |
| July | 27°C | 15°C | 21.1°C | 113 mm | 0 cm |
| August | 26°C | 13°C | 19.9°C | 118 mm | 0 cm |
| September | 22°C | 9°C | 15.5°C | 103 mm | 0 cm |
| October | 14°C | 2°C | 7.9°C | 64 mm | 1 cm |
| November | 6°C | −5°C | 0.6°C | 45 mm | 6 cm |
| December | −2°C | −11°C | −6.3°C | 30 mm | 22 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00470882; 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 Blair?
Normal highs sit between 65°F and 85°F in May, June, July, August and September. Of those, September 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 USC00470882.
When is the last frost in Blair?
In Blair, the last spring frost (32°F) comes after May 9 in half of years and after May 23 in one year in ten; the first autumn frost comes before October 1 in half of years and before September 18 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 23; 9 in 10 after April 28
- First autumn frost, half of years before
- October 11 year in 10 before September 18; 9 in 10 before October 11
NOAA puts the median frost-free season at 143 days, and the season without a hard freeze (28°F) at 162 days.
A hard freeze (28°F) comes after April 30 in half of springs and before October 8 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Blair in zone 4b in ZIP code 54773, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Blair's NOAA station is in zone 4b: the coldest night of a typical year reaches −24°F (18 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 USC00470882; 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 Blair?
In a normal year in Blair, 8 days a year reach 90°F, 177 nights fall to 32°F or colder and 110 days bring measurable precipitation.
- Days at 90°F or more
- 8a 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
- 66high of 32°F or less
- Days with 0.01 inch of precipitation
- 110a normal year
- Days with 1 inch of snow or more
- 14a normal year
The highest temperature in this station's record (since 1896) is 109°F, on July 15, 1936; the lowest is −49°F, on January 7, 1912.
The wettest calendar year on that record is 1968, with 46.90 in; the snowiest season is 1950–51, with 98.5 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00470882; records: ACIS (NOAA Regional Climate Centers), station USC00470882. Records use complete months only; a month missing more than three days is left out.
How sunny is Blair?
Over a year 73% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Blair, 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 | 72% | 1.8 |
| February | 77% | 2.9 |
| March | 74% | 4.0 |
| April | 68% | 4.6 |
| May | 69% | 5.5 |
| June | 74% | 6.0 |
| July | 80% | 6.3 |
| August | 78% | 5.3 |
| September | 75% | 4.1 |
| October | 67% | 2.7 |
| November | 65% | 1.7 |
| December | 62% | 1.3 |
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 Blair need?
A normal year in Blair brings 8,094 heating degree days, 51% more than the median U.S. place (5,373), and 482 cooling degree days, 47% 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 2,335 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,579 | 0 |
| February | 1,295 | 0 |
| March | 1,053 | 0 |
| April | 633 | 2 |
| May | 297 | 22 |
| June | 71 | 112 |
| July | 19 | 176 |
| August | 37 | 124 |
| September | 197 | 44 |
| October | 583 | 3 |
| November | 956 | 0 |
| December | 1,375 | 0 |
| Year (annual) | 8,094 | 482 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00470882. 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 Blair's climate compare?
Blair is warmer than 53 of the other 164 places with their own NOAA record in Wisconsin, and wetter than 101. Across the 7,247 U.S. stations with normals, its annual mean of 44.0°F is warmer than 15%.
In the Köppen classification computed from these normals, Blair 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 Blair share this climate record?
8 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.
- Black River Falls, WI3,563 people · 19 mi E
- Whitehall, WI1,618 people · 7 mi NW
- Independence, WI1,480 people · 10 mi W
- Ettrick, WI521 people · 9 mi S
- Alma Center, WI472 people · 19 mi NE
- Taylor, WI468 people · 6 mi E
- Hixton, WI442 people · 12 mi NE
- Pigeon Falls, WI374 people · 9 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 Blair's climate
What is the coldest month in Blair?
January, with a normal high of 24°F and a normal low of 4°F. The warmest is July (81°F by day, 59°F at night).
Does it snow in Blair?
Yes: 41 inches in a normal year, falling on 25 days with 0.1 inch or more, the most in January (10.0 inches).
What is the rainiest month in Blair?
June, with 5.04 in of precipitation in a normal year; the driest is January with 1.01 in.
What plant hardiness zone is Blair in?
The USDA's 2023 map puts Blair in zone 4b in ZIP code 54773, the nearest ZIP area. By the same method at Blair's NOAA station, the coldest night of a typical year reaches −24°F (18 years, 1991-2020): zone 4b.
How late can frost come in Blair?
In half of years the last 32°F night comes after May 9; in one year in ten it comes after May 23. Waiting until May 23 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Wisconsin climateThe statewide normals and every place in the state
- Dodge, WI19 miles from this station, 46.8°F a year
- Trempealeau, WI22 miles from this station, 46.6°F a year
- Winona, MN27 miles from this station, 48.8°F a year
- Augusta, WI27 miles from this station, 43.4°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made