Keystone, SD weather in February
February in Keystone: cold, with some rain and some snow. Highs 36°F, lows 11°F, about 7 days with rain or snow and about 8.2 in of snow. This is the depth of winter in Keystone.
- Normal high
- 36°F
- Normal low
- 11°F
- Wet days
- 7
- 0.6 in total
- Snowfall
- 8.2 in
- snow on the ground 15 days
How February changes from start to finish
| February 1 | February 28 | |
|---|---|---|
| Normal high | 35°F | 39°F |
| Normal low | 11°F | 14°F |
| Chance of a wet day | 23% | 24% |
| Sunrise / sunset | 7:10 am / 5:03 pm | 6:31 am / 5:40 pm |
| Daylight | 9.9 h | 11.1 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Mountain Time).
A typical February day
- 6 am20°Fdew point 10°F
- 9 am27°Fdew point 12°F
- Noon33°Fdew point 13°F
- 3 pm33°Fdew point 13°F
- 6 pm26°Fdew point 12°F
- 9 pm23°Fdew point 12°F
NOAA hourly normals (local standard time) from Custer Co Airport (15 mi away); average wind 7 mph; clear or few clouds in 42% of daytime hours, mostly cloudy or overcast in 48%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F0 of 28
- Hot dayshigh 90°F or more0 of 28
- Muggy daysdaily mean dew point 65°F or more0 of 28
- Wet daysat least 0.01 in of rain or melted snow7 of 28
- Notable rainat least 0.10 in2 of 28
- Freezing nightslow 32°F or below28 of 28
- Snow on the groundsnow depth 1 in or more15 of 28
Average days per February, counted from daily records for each year 1991-2020.
Rain and snow in February
Normal precipitation is 0.6 in; a dry February brings about 0.3 in and a wet one about 0.8 in (25th and 75th percentiles). Days with half an inch or more are rare. Normal snowfall is 8.2 in, with about 3 days of an inch or more.
How February varies from year to year
- Warmest February, 1991-20201991: average high 46°F
- Coolest February2019: average high 22°F
- Wettest February2020: 1.3 in
- Driest February1999: 0.03 in
- Highest reading70°F (February 17, 2017)
- Lowest reading-34°F (February 3, 1996)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
February compared with January and March
| January | February | March | |
|---|---|---|---|
| Normal high | 36°F | 36°F | 44°F |
| Normal low | 11°F | 11°F | 19°F |
| Wet days | 6 | 7 | 8 |
| Comfortable days | 0 | 0 | 2 |
| Daylight | 9.3 h | 10.5 h | 11.9 h |
Highs change by 0°F from January and +8°F into March.
Nearby alternatives in February
- Warmer: Fort Collins, CO244 mi · high 47°F · 5 wet days
- Cooler: Bismarck, ND238 mi · high 28°F · 8 wet days
How Keystone ranks in February
- Normal high314th warmest of 378 cities; 2nd of 4 in South Dakota
- Wet days111th driest of 378
- Comfortable days295th most of 340
What to pack for Keystone in February
- A warm jacket – lows near 11°F, highs near 36°F
- Layers – afternoons near 36°F but nights near 11°F
- Waterproof boots – snow on the ground on about 15 days
- A hat and gloves – about 28 freezing nights
Heating and cooling
February has 1156 heating degree days and 0 cooling degree days (base 65°F), 13% of the year's total heating and cooling demand.
Questions
How cold is Keystone in February?
The normal high is 36°F and the normal low is 11°F. From 1991 to 2020 the coldest February reading was -34°F (most recently on February 3, 1996).
Does it rain a lot in Keystone in February?
About 7 days in February have at least 0.01 in of precipitation, and the normal total is 0.6 in. The wettest February in 1991-2020 was in 2020 (1.3 in); the driest was in 1999 (0.03 in).
Does it snow in Keystone in February?
Yes. Normal snowfall in February is 8.2 in, and snow covers the ground on about 15 days.
Is February a good time to visit Keystone?
February ranks 10th of 12 months on our comfort score for Keystone (35 out of 100). It has almost no comfortable days. The best month is June.
Where the numbers come from
- Temperature, rain, snowfall, snow depth and frost dates: Pactola Dam (USC00396427), 12 mi NNW of the city center, 4,720 ft (385 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour: Custer Co Airport (USW00094032), 15 mi SW of the city center, 5,545 ft (1,210 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Cloud cover: Ellsworth AFB (USW00024006), 24 mi NE of the city center, 3,215 ft (1,120 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Rapid City Regional Airport (726620-24090), 21 mi ENE of the city center, 3,162 ft (1,173 ft lower than the city). Hourly observations, 1991-2020.