Keystone Weather Forecast 15 Days, Weather in Keystone Today
Current weather conditions and 15 day weather forecast for Keystone, South Dakota, USA including weather daily high/low temperature, warnings, chance of precipitation, pressure, humidity/wind chill, rain risk, wind speed, cloud, pressure, and UV index.
Current weather conditions at Keystone
| 09 February 2026 Monday 5.6 ° C / 42.1°F  Partly Cloudy |
Feels Like : 3.7 ° C / 38.6°F Humidity : % 41 Pressure : 1015 mb Wind Speed : 8.6 kmph / 5.4 miles from W  Visibility : 16 km Precipitation (rainfall) : 0 mm Cloud (%) : 0 |
15 day weather forecast for Keystone, SD, USA
Weather Forecast for next 15 Days for Keystone including weather warnings, temperature, rain, wind speed, cloud, snow, wind speed and wind direction, pressure and UV index.Here is weather for the next 15 days in Keystone, South Dakota state, US. To see the daily forecast, scroll to the table below.
| Date | Weather forecast | Low temperature | High temperature | Avg. temperature | Humidity | Chance of rain | UV Index | Sun Position | Moon Position | |
|---|---|---|---|---|---|---|---|---|---|---|
| 09 February 2026 Monday | Partly Cloudy |
-0.5 ° C (31.1°F) |
9.2 ° C (48.6°F) |
4.4 ° C (39.8°F) |
% 65 | 0% | 0.5 | Sunrise:07:02 AM Sunset: 05:16 PM |
Moonrise:01:08 AM Moonset: 10:12 AM Moon Phase ( Last Quarter ) |
|
| 10 February 2026 Tuesday |  Sunny |
-3.9 ° C (25°F) |
6.1 ° C (43°F) |
0.5 ° C (33°F) |
% 62 | 0% | 0.4 | Sunrise:07:00 AM Sunset: 05:18 PM |
Moonrise:02:13 AM Moonset: 10:45 AM Moon Phase ( Waning Crescent ) |
|
| 11 February 2026 Wednesday | Partly Cloudy |
-1.2 ° C (29.8°F) |
11.4 ° C (52.5°F) |
3.8 ° C (38.8°F) |
% 56 | 0% | 0.4 | Sunrise:06:59 AM Sunset: 05:19 PM |
Moonrise:03:15 AM Moonset: 11:26 AM Moon Phase ( Waning Crescent ) |
|
| 12 February 2026 Thursday |  Patchy rain nearby |
-1.8 ° C (28.7°F) |
7.2 ° C (45°F) |
2.7 ° C (36.8°F) |
% 64 | 89% | 0.3 | Sunrise:06:57 AM Sunset: 05:20 PM |
Moonrise:04:11 AM Moonset: 12:15 PM Moon Phase ( Waning Crescent ) |
|
| 13 February 2026 Friday | Sunny |
-2.7 ° C (27.1°F) |
8.3 ° C (47°F) |
0.6 ° C (33.1°F) |
% 60 | 0% | 0 | Sunrise:06:56 AM Sunset: 05:22 PM |
Moonrise:05:00 AM Moonset: 01:15 PM Moon Phase ( Waning Crescent ) |
|
| 14 February 2026 Saturday | Sunny |
-2.2 ° C (28.1°F) |
8.5 ° C (47.2°F) |
3 ° C (37.5°F) |
% 44 | 0% | 2 | Sunrise:06:54 AM Sunset: 05:23 PM |
Moonrise:05:41 AM Moonset: 02:21 PM Moon Phase ( Waning Crescent ) |
|
| 15 February 2026 Sunday | Sunny |
1.4 ° C (34.4°F) |
11.4 ° C (52.5°F) |
5.8 ° C (42.5°F) |
% 32 | 0% | 3 | Sunrise:06:53 AM Sunset: 05:25 PM |
Moonrise:06:13 AM Moonset: 03:31 PM Moon Phase ( Waning Crescent ) |
|
| 16 February 2026 Monday | Sunny |
-3.4 ° C (25.9°F) |
6.2 ° C (43.2°F) |
2 ° C (35.7°F) |
% 37 | 0% | 2 | Sunrise:06:52 AM Sunset: 05:26 PM |
Moonrise:06:40 AM Moonset: 04:43 PM Moon Phase ( Waning Crescent ) |
|
| 17 February 2026 Tuesday |  Light freezing rain |
-6 ° C (21.1°F) |
6.4 ° C (43.5°F) |
0.8 ° C (33.4°F) |
% 44 | 62% | 1 | Sunrise:06:50 AM Sunset: 05:27 PM |
Moonrise:07:03 AM Moonset: 05:55 PM Moon Phase ( New Moon ) |
|
| 18 February 2026 Wednesday | Patchy rain nearby |
-4.1 ° C (24.7°F) |
7.2 ° C (44.9°F) |
1.7 ° C (35.1°F) |
% 46 | 62% | 1 | Sunrise:06:48 AM Sunset: 05:29 PM |
Moonrise:07:23 AM Moonset: 07:08 PM Moon Phase ( Waxing Crescent ) |
|
| 19 February 2026 Thursday |  Moderate snow |
-10.1 ° C (13.8°F) |
-0.9 ° C (30.3°F) |
-5.7 ° C (21.7°F) |
% 80 | 89% | 1 | Sunrise:06:47 AM Sunset: 05:30 PM |
Moonrise:07:43 AM Moonset: 08:20 PM Moon Phase ( Waxing Crescent ) |
|
| 20 February 2026 Friday | Light freezing rain |
-14.7 ° C (5.5°F) |
-4.4 ° C (24.2°F) |
-10.4 ° C (13.2°F) |
% 79 | 82% | 1 | Sunrise:06:45 AM Sunset: 05:31 PM |
Moonrise:08:02 AM Moonset: 09:36 PM Moon Phase ( Waxing Crescent ) |
|
| 21 February 2026 Saturday | Partly Cloudy |
-18 ° C (-0.4°F) |
-1.6 ° C (29.2°F) |
-11.1 ° C (12°F) |
% 80 | 0% | 2 | Sunrise:06:44 AM Sunset: 05:33 PM |
Moonrise:08:24 AM Moonset: 10:52 PM Moon Phase ( Waxing Crescent ) |
|
| 22 February 2026 Sunday |  Cloudy |
-17.3 ° C (0.9°F) |
-2.7 ° C (27.1°F) |
-9.3 ° C (15.2°F) |
% 77 | 0% | 1 | Sunrise:06:42 AM Sunset: 05:34 PM |
Moonrise:08:50 AM Moonset: No moonset Moon Phase ( Waxing Crescent ) |
|
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