Williams Creek, SD climate
Williams Creek has cold, snowy winters and warm summers, with very little rain. A typical July afternoon reaches 89°, a January night drops to 11°, and about 49 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Williams Creek feels like
Winter
Spring
Summer
Fall
Williams Creek 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 | 30-yr range |
|---|---|---|---|---|---|---|
| January | 33° | 11° | 0.5" | 7.5" | 6 | 13° – 36° |
| February | 37° | 14° | 0.6" | 8.5" | 6 | 9° – 37° |
| March | 48° | 23° | 1.0" | 8.1" | 6 | 23° – 49° |
| April | 59° | 33° | 2.3" | 6.8" | 9 | 38° – 52° |
| May | 70° | 45° | 3.3" | 0 | 13 | 52° – 64° |
| June | 81° | 55° | 3.4" | 0 | 11 | 63° – 73° |
| July | 89° | 61° | 2.7" | 0 | 8 | 66° – 81° |
| August | 87° | 59° | 2.4" | 0 | 8 | 67° – 77° |
| September | 78° | 49° | 1.6" | 0 | 6 | 57° – 69° |
| October | 63° | 36° | 1.6" | 1.8" | 7 | 40° – 56° |
| November | 47° | 24° | 0.6" | 5.6" | 5 | 24° – 45° |
| December | 35° | 14° | 0.5" | 10.8" | 5 | 13° – 32° |
| Year | 61° | 35° | 20.3" | 49.1" | 91 |
“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 Williams Creek
Williams Creek gets 20 inches of rain and melted snow a year. June is the wettest month and December the driest. Rain or snow falls on about 91 days a year.
About 158 frost-free days a year
In half of years the last 32° night comes by May 3 and the first one by October 9. That leaves about 158 frost-free days for gardens, shorter than 73% of U.S. towns.
Heating and cooling a home in Williams Creek
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Williams Creek, 89% of that work is heating and 11% 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.
Williams Creek and its neighbors
Williams Creek borders 6 towns with climate data. January nights across them vary by 1.8°. Mussman has the coldest January nights (10°) and Zickrick the hottest July afternoons (89°). Williams Creek’s January low is 11° and its July high 89°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Williams Creek 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 Williams Creek averaged 1.0° warmer than the 1900s. The biggest change is in January (+3.7°). The shift is smaller than in 72% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Williams Creek’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 9° to 37°. June is the most reliable, staying within 10°.
Common questions about Williams Creek’s climate
What is the coldest month in Williams Creek?
January, with a typical high of 33° and a low of 11°.
What is the hottest month in Williams Creek?
July, with a typical high of 89° and a low of 61°. About 34 days a year reach 90°.
How much snow does Williams Creek get?
About 49 inches in a normal winter, most of it in December.
When is the first frost in Williams Creek?
In half of years the first 32° night comes by October 9, and the last spring frost by May 3.
What is the rainiest month in Williams Creek?
June, with 3.4 inches of rain and melted snow. The year totals 20 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Williams Creek itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Murdo, SD (16 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.