Beloit, Wisconsin climate: Normal weather by month, frost dates and records
Beloit's normal year runs from 11°F January nights to 80°F July afternoons, with 37.4 inches of precipitation and 36 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 7.4°C, January lows of −12°C, July highs of 26°C, 950 mm of precipitation a year.
- NOAA stationBeloit
- Station IDUSC00470696
- Location42.50°N 89.03°W
- Elevation788 ft (240 m)
- Population36,633
On October 22, the normal high in Beloit is 56°F and the normal low 37°F, and the chance of measurable rain or snow is 29%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Beloit.
- Jan 25° 11°
- Feb 29° 14°
- Mar 42° 24°
- Apr 55° 34°
- May 67° 46°
- Jun 76° 56°
- Jul 80° 60°
- Aug 78° 58°
- Sep 71° 50°
- Oct 58° 39°
- Nov 43° 27°
- Dec 31° 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 Beloit each month?
July is the warmest month, with normal highs of 80°F; January the coldest, with normal lows of 11°F. The most precipitation falls in June (5.64 in), the least in February (1.52 in).
Each month has its own page with the day-by-day normals, the month's records and its recent years:
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 25°F | 11°F | 17.9°F | 1.60 | 9.8 | 9 | <1 | 30 | 9 h 20 min |
| February | 29°F | 14°F | 21.6°F | 1.52 | 7.3 | 7 | <1 | 26 | 10 h 30 min |
| March | 42°F | 24°F | 32.7°F | 2.13 | 4.3 | 8 | <1 | 23 | 11 h 50 min |
| April | 55°F | 34°F | 44.6°F | 3.72 | 1.1 | 10 | <1 | 9 | 13 h 20 min |
| May | 67°F | 46°F | 56.1°F | 4.34 | 0.0 | 12 | <1 | 1 | 14 h 30 min |
| June | 76°F | 56°F | 65.9°F | 5.64 | 0.0 | 11 | 2 | <1 | 15 h 20 min |
| July | 80°F | 60°F | 69.7°F | 3.36 | 0.0 | 9 | 4 | <1 | 15 h |
| August | 78°F | 58°F | 68.1°F | 4.14 | 0.0 | 9 | 3 | <1 | 14 h |
| September | 71°F | 50°F | 60.8°F | 3.83 | 0.0 | 8 | 1 | <1 | 12 h 30 min |
| October | 58°F | 39°F | 48.5°F | 2.77 | 0.2 | 9 | <1 | 6 | 11 h 10 min |
| November | 43°F | 27°F | 35.3°F | 2.40 | 2.7 | 8 | <1 | 19 | 9 h 50 min |
| December | 31°F | 17°F | 23.8°F | 1.96 | 10.2 | 9 | <1 | 28 | 9 h 10 min |
| Year (annual) | 55°F | 36°F | 45.4°F | 37.41 | 35.6 | 108 | 10 | 142 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | −4°C | −12°C | −7.8°C | 41 mm | 25 cm |
| February | −1°C | −10°C | −5.8°C | 39 mm | 19 cm |
| March | 5°C | −5°C | 0.4°C | 54 mm | 11 cm |
| April | 13°C | 1°C | 7.0°C | 94 mm | 3 cm |
| May | 19°C | 8°C | 13.4°C | 110 mm | 0 cm |
| June | 24°C | 13°C | 18.8°C | 143 mm | 0 cm |
| July | 26°C | 15°C | 20.9°C | 85 mm | 0 cm |
| August | 26°C | 15°C | 20.1°C | 105 mm | 0 cm |
| September | 22°C | 10°C | 16.0°C | 97 mm | 0 cm |
| October | 15°C | 4°C | 9.2°C | 70 mm | 1 cm |
| November | 6°C | −3°C | 1.8°C | 61 mm | 7 cm |
| December | −1°C | −8°C | −4.6°C | 50 mm | 26 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00470696; 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 Beloit?
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 (8).
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 USC00470696.
When is the last frost in Beloit?
In Beloit, the last spring frost (32°F) comes after May 1 in half of years and after May 16 in one year in ten; the first autumn frost comes before October 12 in half of years and before September 28 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 11 year in 10 after May 16; 9 in 10 after April 17
- First autumn frost, half of years before
- October 121 year in 10 before September 28; 9 in 10 before October 24
NOAA puts the median frost-free season at 162 days, and the season without a hard freeze (28°F) at 186 days.
A hard freeze (28°F) comes after April 20 in half of springs and before October 23 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Beloit in zone 5b in ZIP code 53511. By the map's own method, the average of each year's coldest night over 1991-2020, Beloit's NOAA station is in zone 5b: the coldest night of a typical year reaches −12°F (27 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 USC00470696; 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 Beloit?
In a normal year in Beloit, 10 days a year reach 90°F, 142 nights fall to 32°F or colder and 108 days bring measurable precipitation.
- Days at 90°F or more
- 10a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 142a normal year
- Days that stay below freezing
- 57high of 32°F or less
- Days with 0.01 inch of precipitation
- 108a normal year
- Days with 1 inch of snow or more
- 13a normal year
The highest temperature in this station's record (since 1893) is 110°F, on July 14, 1936; the lowest is −29°F, on January 31, 2019.
The wettest calendar year on that record is 1972, with 47.99 in; the snowiest season is 2008–09, with 66.7 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00470696; records: ACIS (NOAA Regional Climate Centers), station USC00470696. Records use complete months only; a month missing more than three days is left out.
How sunny is Beloit?
Over a year 73% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Beloit, 3.9 kWh per square metre a day. July is the sunniest month (80%) and December the cloudiest (61%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 66% | 1.8 |
| February | 70% | 2.8 |
| March | 69% | 3.8 |
| April | 68% | 4.7 |
| May | 71% | 5.5 |
| June | 76% | 6.2 |
| July | 80% | 6.3 |
| August | 79% | 5.5 |
| September | 78% | 4.4 |
| October | 70% | 2.9 |
| November | 67% | 1.9 |
| December | 61% | 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 Beloit need?
A normal year in Beloit brings 7,570 heating degree days, 41% more than the median U.S. place (5,373), and 467 cooling degree days, 49% 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 2,380 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,460 | 0 |
| February | 1,214 | 0 |
| March | 1,003 | 0 |
| April | 614 | 2 |
| May | 302 | 26 |
| June | 71 | 100 |
| July | 19 | 165 |
| August | 31 | 125 |
| September | 172 | 46 |
| October | 515 | 4 |
| November | 891 | 0 |
| December | 1,279 | 0 |
| Year (annual) | 7,570 | 467 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00470696. 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 Beloit been warmer than normal lately?
2025 averaged 49.7°F, 4.3°F above the 1991-2020 normal of 45.4°F. 4 of the 4 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 50.1°F | +4.7°F | 25.41 | 49.2 |
| 2022 | 47.7°F | +2.3°F | 33.80 | 33.5 |
| 2024 | 52.1°F | +6.7°F | 36.51 | 24.3 |
| 2025 | 49.7°F | +4.3°F | 33.23 | 36.5 |
Over 92 complete years from 1883 to 2025, the station's annual mean temperature rose at a fitted 1.0°F per century (+0.05°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00470696; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Beloit's climate compare?
Beloit is warmer than 91 of the other 164 places with their own NOAA record in Wisconsin, and wetter than 131. Across the 7,247 U.S. stations with normals, its annual mean of 45.4°F is warmer than 21%.
In the Köppen classification computed from these normals, Beloit 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 Beloit share this climate record?
12 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.
- Belvidere, IL25,325 people · 18 mi SE
- Loves Park, IL23,636 people · 12 mi S
- Machesney Park, IL22,839 people · 9 mi S
- Roscoe, IL10,981 people · 6 mi S
- South Beloit, IL7,983 people · 1 mi S
- Rockton, IL7,861 people · 4 mi SW
- Candlewick Lake, IL5,459 people · 13 mi SE
- Pecatonica, IL2,058 people · 21 mi SW
- Westlake Village, IL1,282 people · 19 mi SW
- Timberlane, IL902 people · 14 mi SE
- Argyle, IL561 people · 11 mi SE
- Caledonia, IL182 people · 12 mi SE
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 Beloit's climate
What is the coldest month in Beloit?
January, with a normal high of 25°F and a normal low of 11°F. The warmest is July (80°F by day, 60°F at night).
Does it snow in Beloit?
Yes: 36 inches in a normal year, falling on 19 days with 0.1 inch or more, the most in December (10.2 inches).
What is the rainiest month in Beloit?
June, with 5.64 in of precipitation in a normal year; the driest is February with 1.52 in.
What plant hardiness zone is Beloit in?
The USDA's 2023 map puts Beloit in zone 5b in ZIP code 53511. By the same method at Beloit's NOAA station, the coldest night of a typical year reaches −12°F (27 years, 1991-2020): zone 5b.
How late can frost come in Beloit?
In half of years the last 32°F night comes after May 1; in one year in ten it comes after May 16. Waiting until May 16 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Beloit in OctoberThis month day by day, its records and recent years
- Wisconsin climateThe statewide normals and every place in the state
- Clinton, WI9 miles from this station, 47.0°F a year
- Afton - Janesville Wastewater Treatment Plant, WI9 miles from this station, 47.8°F a year
- Brodhead, WI20 miles from this station, 47.2°F a year
- Delavan, WI21 miles from this station, 47.6°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made