Bryan, SD climate
Bryan has cold, snowy winters and warm summers. A typical July afternoon reaches 87°, a January night drops to 10°, and about 31 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Bryan feels like
Winter
Spring
Summer
Fall
Bryan 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 | 31° | 10° | 0.6" | 5.7" | 5 | 17 | 12° – 35° |
| February | 36° | 14° | 0.8" | 6.4" | 5 | 12 | 12° – 35° |
| March | 48° | 24° | 1.3" | 5.3" | 6 | 7 | 26° – 51° |
| April | 60° | 35° | 2.9" | 3.2" | 9 | 2 | 38° – 54° |
| May | 71° | 47° | 3.7" | 0 | 11 | 0 | 54° – 65° |
| June | 81° | 58° | 3.7" | 0 | 11 | 0 | 65° – 74° |
| July | 87° | 63° | 3.0" | 0 | 7 | 0 | 67° – 84° |
| August | 84° | 60° | 3.2" | 0 | 7 | 0 | 67° – 76° |
| September | 77° | 51° | 2.7" | 0 | 7 | 0 | 58° – 70° |
| October | 62° | 37° | 2.1" | 0.1" | 7 | 0 | 42° – 55° |
| November | 47° | 24° | 0.9" | 3.5" | 4 | 4 | 25° – 45° |
| December | 34° | 14° | 0.7" | 7.1" | 4 | 15 | 12° – 29° |
| Year | 60° | 36° | 25.5" | 31.3" | 84 | 57 |
“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 Bryan
Bryan gets 25 inches of rain and melted snow a year. May is the wettest month and January the driest. Rain or snow falls on about 84 days a year. Snow covers the ground about 57 days of the year.
About 164 frost-free days a year
In half of years the last 32° night comes by April 29 and the first one by October 9. That leaves about 164 frost-free days for gardens, shorter than 67% of U.S. towns.
Heating and cooling a home in Bryan
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Bryan, 86% of that work is heating and 14% 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.
Bryan and its neighbors
Bryan borders 5 towns with climate data. January nights across them vary by 1.6°. Kennedy has the coldest January nights (10°) and Wagner the hottest July afternoons (87°). Bryan’s January low is 10° and its July high 87°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Bryan 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 Bryan averaged 0.7° warmer than the 1900s. The biggest change is in January (+2.9°). The shift is smaller than in 91% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Bryan’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 26° to 51°. August is the most reliable, staying within 9°.
Common questions about Bryan’s climate
What is the coldest month in Bryan?
January, with a typical high of 31° and a low of 10°.
What is the hottest month in Bryan?
July, with a typical high of 87° and a low of 63°. About 34 days a year reach 90°.
How much snow does Bryan get?
About 31 inches in a normal winter, most of it in December.
When is the first frost in Bryan?
In half of years the first 32° night comes by October 9, and the last spring frost by April 29.
What is the rainiest month in Bryan?
May, with 3.7 inches of rain and melted snow. The year totals 25 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Bryan itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Pickstown, SD (14 mi, snow) and Wagner, SD (4 mi, frost, heat and degree days). Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.