Mequon, WI climate
Mequon has cold, snowy winters and pleasant summers. A typical July afternoon reaches 82°, a January night drops to 14°, and about 54 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Mequon feels like
Winter
Spring
Summer
Fall
Mequon 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 | 29° | 14° | 1.6" | 16.5" | 10 | 23 | 11° – 33° |
| February | 32° | 16° | 1.5" | 16.0" | 8 | 19 | 13° – 34° |
| March | 43° | 25° | 2.0" | 6.5" | 9 | 9 | 26° – 48° |
| April | 55° | 35° | 3.7" | 2.0" | 11 | 1 | 36° – 50° |
| May | 67° | 45° | 3.7" | 0.3" | 13 | 0 | 50° – 61° |
| June | 77° | 55° | 4.3" | 0 | 12 | 0 | 62° – 71° |
| July | 82° | 61° | 3.6" | 0 | 11 | 0 | 66° – 78° |
| August | 79° | 60° | 3.7" | 0 | 11 | 0 | 65° – 75° |
| September | 73° | 52° | 3.1" | 0 | 10 | 0 | 56° – 67° |
| October | 60° | 41° | 2.7" | 0.3" | 12 | 0 | 46° – 56° |
| November | 46° | 30° | 2.1" | 2.4" | 10 | 3 | 28° – 46° |
| December | 34° | 20° | 1.8" | 10.3" | 9 | 15 | 14° – 37° |
| Year | 56° | 38° | 33.6" | 54.3" | 125 | 70 |
“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 Mequon
Mequon gets 34 inches of rain and melted snow a year. June is the wettest month and February the driest. Rain or snow falls on about 125 days a year. Snow covers the ground about 70 days of the year.
About 154 frost-free days a year
In half of years the last 32° night comes by May 6 and the first one by October 8. That leaves about 154 frost-free days for gardens, shorter than 77% of U.S. towns.
Heating and cooling a home in Mequon
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Mequon, 94% of that work is heating and 6% 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.
Mequon and its neighbors
Mequon borders 4 towns with climate data. January nights across them vary by 2.9°. Cedarburg has the coldest January nights (13°) and Milwaukee the hottest July afternoons (82°). Mequon’s January low is 14° and its July high 82°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Mequon 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 Mequon averaged 1.4° warmer than the 1900s. The biggest change is in December (+3.2°). The shift is larger than in 62% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Mequon’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. December swings the most: between 1991 and 2020 its average temperature ranged from 14° to 37°. June is the most reliable, staying within 9°.
Common questions about Mequon’s climate
What is the coldest month in Mequon?
January, with a typical high of 29° and a low of 14°.
What is the hottest month in Mequon?
July, with a typical high of 82° and a low of 61°. About 7 days a year reach 90°.
How much snow does Mequon get?
About 54 inches in a normal winter, most of it in January.
When is the first frost in Mequon?
In half of years the first 32° night comes by October 8, and the last spring frost by May 6.
What is the rainiest month in Mequon?
June, with 4.3 inches of rain and melted snow. The year totals 34 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Mequon itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Germantown, WI (6 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.