Lennox, SD climate
Lennox has cold, snowy winters and warm summers. A typical July afternoon reaches 85°, a January night drops to 8°, and about 45 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Lennox feels like
Winter
Spring
Summer
Fall
Lennox 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 | 27° | 8° | 0.6" | 8.0" | 7 | 22 | 7° – 32° |
| February | 32° | 13° | 0.8" | 8.6" | 7 | 16 | 10° – 34° |
| March | 45° | 24° | 1.4" | 7.2" | 8 | 10 | 25° – 51° |
| April | 59° | 35° | 2.9" | 5.1" | 10 | 2 | 37° – 53° |
| May | 70° | 47° | 3.9" | 0.1" | 12 | 0 | 53° – 65° |
| June | 81° | 58° | 4.5" | 0 | 12 | 0 | 65° – 74° |
| July | 85° | 62° | 3.2" | 0 | 9 | 0 | 65° – 81° |
| August | 82° | 60° | 3.4" | 0 | 9 | 0 | 65° – 75° |
| September | 75° | 51° | 3.0" | 0 | 8 | 0 | 56° – 68° |
| October | 61° | 38° | 2.3" | 1.4" | 8 | 1 | 42° – 54° |
| November | 44° | 24° | 1.2" | 6.2" | 6 | 5 | 25° – 45° |
| December | 31° | 13° | 0.8" | 8.7" | 7 | 16 | 9° – 28° |
| Year | 57° | 36° | 27.9" | 45.3" | 104 | 73 |
“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 Lennox
Lennox gets 28 inches of rain and melted snow a year. June is the wettest month and January the driest. Rain or snow falls on about 104 days a year. Snow covers the ground about 73 days of the year.
About 157 frost-free days a year
In half of years the last 32° night comes by May 1 and the first one by October 6. That leaves about 157 frost-free days for gardens, shorter than 74% of U.S. towns.
Heating and cooling a home in Lennox
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Lennox, 90% of that work is heating and 10% 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.
Lennox and its neighbors
Lennox borders 2 towns with climate data. January nights across them vary by 0.2°. Perry has the coldest January nights (8°) and Grant the hottest July afternoons (85°). Lennox’s January low is 8° and its July high 85°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Lennox 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 Lennox averaged 1.1° warmer than the 1900s. The biggest change is in January (+2.7°). The shift is smaller than in 64% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Lennox’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. March swings the most: between 1991 and 2020 its average temperature ranged from 25° to 51°. August is the most reliable, staying within 10°.
Common questions about Lennox’s climate
What is the coldest month in Lennox?
January, with a typical high of 27° and a low of 8°.
What is the hottest month in Lennox?
July, with a typical high of 85° and a low of 62°. About 15 days a year reach 90°.
How much snow does Lennox get?
About 45 inches in a normal winter, most of it in December.
When is the first frost in Lennox?
In half of years the first 32° night comes by October 6, and the last spring frost by May 1.
What is the rainiest month in Lennox?
June, with 4.5 inches of rain and melted snow. The year totals 28 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Lennox itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Sioux Falls, SD (18 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.