South Lancaster, WI climate
South Lancaster has cold, snowy winters and pleasant summers. A typical July afternoon reaches 82°, a January night drops to 10°, and about 37 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in South Lancaster feels like
Winter
Spring
Summer
Fall
South Lancaster weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 26° | 10° | 1.3" | 10.0" | 8 | 23 | 9° – 31° |
| February | 31° | 14° | 1.3" | 8.9" | 8 | 21 | 10° – 35° |
| March | 44° | 25° | 2.1" | 4.9" | 10 | 10 | 26° – 50° |
| April | 58° | 36° | 3.8" | 1.6" | 11 | 1 | 37° – 54° |
| May | 69° | 48° | 4.4" | 0.2" | 13 | 0 | 52° – 65° |
| June | 79° | 58° | 5.6" | 0 | 12 | 0 | 65° – 72° |
| July | 82° | 62° | 5.0" | 0 | 10 | 0 | 65° – 79° |
| August | 80° | 60° | 4.1" | 0 | 10 | 0 | 65° – 76° |
| September | 73° | 52° | 4.1" | 0 | 9 | 0 | 56° – 68° |
| October | 60° | 39° | 2.9" | 0.5" | 9 | 0 | 45° – 55° |
| November | 45° | 28° | 2.3" | 2.6" | 8 | 3 | 28° – 47° |
| December | 32° | 17° | 1.6" | 8.7" | 9 | 16 | 10° – 34° |
| Year | 57° | 37° | 38.4" | 37.4" | 118 | 74 |
“Wet days” have at least 0.01" of rain or melted snow. “Snow on ground” counts days with 1" or more. The 30-year range is the coldest and warmest that month’s average temperature got between 1991 and 2020.
Rain and snow in South Lancaster
South Lancaster gets 38 inches of rain and melted snow a year. June is the wettest month and January the driest. Rain or snow falls on about 118 days a year. Snow covers the ground about 74 days of the year.
About 166 frost-free days a year
In half of years the last 32° night comes by April 27 and the first one by October 11. That leaves about 166 frost-free days for gardens, shorter than 64% of U.S. towns.
Heating and cooling a home in South Lancaster
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In South Lancaster, 92% of that work is heating and 8% is cooling, so the furnace matters far more than the air conditioner.
Degree days measure how far each day’s average temperature falls below or rises above 65°, added up over a year. Source: NOAA station normals.
South Lancaster and its neighbors
South Lancaster borders 5 towns with climate data. January nights across them vary by 1.1°. North Lancaster has the coldest January nights (10°) and Potosi the hottest July afternoons (83°). South Lancaster’s January low is 10° and its July high 82°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How South Lancaster compares
Compared with every U.S. town and city on TownTapestry, each counted once.
Warmer than it used to be
The last 30 years in South Lancaster averaged 0.7° warmer than the 1900s. The biggest change is in December (+2.2°). The shift is smaller than in 89% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at South Lancaster’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. February swings the most: between 1991 and 2020 its average temperature ranged from 10° to 35°. June is the most reliable, staying within 7°.
Common questions about South Lancaster’s climate
What is the coldest month in South Lancaster?
January, with a typical high of 26° and a low of 10°.
What is the hottest month in South Lancaster?
July, with a typical high of 82° and a low of 62°. About 4 days a year reach 90°.
How much snow does South Lancaster get?
About 37 inches in a normal winter, most of it in January.
When is the first frost in South Lancaster?
In half of years the first 32° night comes by October 11, and the last spring frost by April 27.
What is the rainiest month in South Lancaster?
June, with 5.6 inches of rain and melted snow. The year totals 38 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for South Lancaster itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Lancaster 4 Wsw, WI (3 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.