Glendo, SD climate
Glendo has cold, snowy winters and warm summers, with very little rain. A typical July afternoon reaches 86°, a January night drops to 7°, and about 40 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Glendo feels like
Winter
Spring
Summer
Fall
Glendo 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 | 29° | 7° | 0.4" | 5.6" | 3 | 9° – 31° |
| February | 32° | 10° | 0.5" | 8.0" | 4 | 2° – 33° |
| March | 44° | 20° | 0.7" | 7.0" | 4 | 20° – 45° |
| April | 56° | 29° | 1.5" | 5.4" | 6 | 36° – 48° |
| May | 67° | 40° | 2.8" | 0.7" | 7 | 48° – 59° |
| June | 77° | 50° | 3.0" | 0 | 8 | 59° – 69° |
| July | 86° | 56° | 2.3" | 0 | 7 | 62° – 77° |
| August | 85° | 54° | 1.6" | 0 | 5 | 63° – 75° |
| September | 75° | 44° | 1.3" | 0 | 4 | 52° – 65° |
| October | 58° | 31° | 1.5" | 3.0" | 4 | 37° – 50° |
| November | 43° | 19° | 0.5" | 4.1" | 3 | 19° – 41° |
| December | 32° | 10° | 0.4" | 5.9" | 3 | 9° – 29° |
| Year | 57° | 31° | 16.3" | 39.7" | 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 Glendo
Glendo gets 16 inches of rain and melted snow a year. June is the wettest month and January the driest. Rain or snow falls on about 57 days a year.
About 126 frost-free days a year
In half of years the last 32° night comes by May 18 and the first one by September 23. That leaves about 126 frost-free days for gardens, shorter than 96% of U.S. towns.
Heating and cooling a home in Glendo
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Glendo, 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.
Glendo and its neighbors
Glendo borders 2 towns with climate data. January nights across them vary by 0.8°. Sidney has both the coldest January nights (7°) and the hottest July afternoons (86°). Glendo’s January low is 7° and its July high 86°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Glendo 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 Glendo averaged 1.4° warmer than the 1900s. The biggest change is in January (+4.2°). The shift is larger than in 64% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Glendo’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 2° to 33°. June is the most reliable, staying within 11°.
Common questions about Glendo’s climate
What is the coldest month in Glendo?
January, with a typical high of 29° and a low of 7°.
What is the hottest month in Glendo?
July, with a typical high of 86° and a low of 56°. About 25 days a year reach 90°.
How much snow does Glendo get?
About 40 inches in a normal winter, most of it in February.
When is the first frost in Glendo?
In half of years the first 32° night comes by September 23, and the last spring frost by May 18.
What is the rainiest month in Glendo?
June, with 3.0 inches of rain and melted snow. The year totals 16 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Glendo itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Bison, SD (25 mi, snow) and Ralph 1 N, SD (10 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.