Current weather conditions and 15 day weather forecast for Keystone XL Opal Heliport, 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.
| 09 August 2026 Sunday 27.7 ° C / 81.9°F ![]() Smoky haze |
Feels Like : 21.1 ° C / 70°F Humidity : % 13 Pressure : 1008 mb Wind Speed : 22 kmph / 13.6 miles from N ![]() Visibility : 10 km Precipitation (rainfall) : 0 mm Cloud (%) : 0 |
| Date | Weather forecast | Low temperature | High temperature | Avg. temperature | Humidity | Chance of rain | UV Index | Sun Position | Moon Position | |
|---|---|---|---|---|---|---|---|---|---|---|
| 08 August 2026 Saturday | Sunny |
16.5 ° C (61.7°F) |
37 ° C (98.6°F) |
25.9 ° C (78.6°F) |
% 33 | 0% | 5.9 | Sunrise:05:44 AM Sunset: 08:08 PM |
Moonrise:12:13 AM Moonset: 05:05 PM Moon Phase ( Waning Crescent ) |
|
| 09 August 2026 Sunday | Sunny |
17.5 ° C (63.5°F) |
33.2 ° C (91.7°F) |
25 ° C (76.9°F) |
% 45 | 2% | 5.7 | Sunrise:05:45 AM Sunset: 08:07 PM |
Moonrise:01:09 AM Moonset: 06:07 PM Moon Phase ( Waning Crescent ) |
|
| 10 August 2026 Monday | Sunny |
20 ° C (68.1°F) |
36.5 ° C (97.7°F) |
28.2 ° C (82.8°F) |
% 37 | 2% | 6.4 | Sunrise:05:46 AM Sunset: 08:05 PM |
Moonrise:02:21 AM Moonset: 06:56 PM Moon Phase ( New Moon ) |
|
| 11 August 2026 Tuesday | Sunny |
18 ° C (64.4°F) |
32.5 ° C (90.4°F) |
24.7 ° C (76.4°F) |
% 52 | 57% | 6.2 | Sunrise:05:47 AM Sunset: 08:04 PM |
Moonrise:03:44 AM Moonset: 07:34 PM Moon Phase ( New Moon ) |
|
| 12 August 2026 Wednesday | Sunny |
16.8 ° C (62.2°F) |
32.8 ° C (91°F) |
24.5 ° C (76.1°F) |
% 55 | 62% | 5.3 | Sunrise:05:49 AM Sunset: 08:02 PM |
Moonrise:05:11 AM Moonset: 08:03 PM Moon Phase ( New Moon ) |
|
| 13 August 2026 Thursday | Sunny |
16.9 ° C (62.5°F) |
26.6 ° C (79.8°F) |
20.9 ° C (69.7°F) |
% 68 | 17% | 7 | Sunrise:05:50 AM Sunset: 08:01 PM |
Moonrise:06:37 AM Moonset: 08:28 PM Moon Phase ( New Moon ) |
|
| 14 August 2026 Friday | Partly Cloudy |
17.9 ° C (64.2°F) |
26.5 ° C (79.7°F) |
21.3 ° C (70.4°F) |
% 68 | 57% | 7 | Sunrise:05:51 AM Sunset: 07:59 PM |
Moonrise:08:00 AM Moonset: 08:49 PM Moon Phase ( Waxing Crescent ) |
|
| 15 August 2026 Saturday | Sunny |
18.5 ° C (65.3°F) |
28.7 ° C (83.7°F) |
23.4 ° C (74.1°F) |
% 61 | 17% | 7 | Sunrise:05:52 AM Sunset: 07:57 PM |
Moonrise:09:20 AM Moonset: 09:09 PM Moon Phase ( Waxing Crescent ) |
|
| 16 August 2026 Sunday | Sunny |
19.3 ° C (66.7°F) |
27.2 ° C (81°F) |
22.3 ° C (72.2°F) |
% 64 | 36% | 7 | Sunrise:05:53 AM Sunset: 07:56 PM |
Moonrise:10:38 AM Moonset: 09:30 PM Moon Phase ( Waxing Crescent ) |
|
| 17 August 2026 Monday | Sunny |
18 ° C (64.4°F) |
34.4 ° C (93.9°F) |
25.6 ° C (78°F) |
% 52 | 2% | 8 | Sunrise:05:55 AM Sunset: 07:54 PM |
Moonrise:11:54 AM Moonset: 09:53 PM Moon Phase ( Waxing Crescent ) |
|
| 18 August 2026 Tuesday | Sunny |
16.9 ° C (62.4°F) |
31.8 ° C (89.2°F) |
24.7 ° C (76.4°F) |
% 44 | 57% | 8 | Sunrise:05:56 AM Sunset: 07:53 PM |
Moonrise:01:09 PM Moonset: 10:20 PM Moon Phase ( First Quarter ) |
|
| 19 August 2026 Wednesday | Sunny |
14.9 ° C (58.9°F) |
26 ° C (78.8°F) |
20.5 ° C (68.8°F) |
% 55 | 36% | 7 | Sunrise:05:57 AM Sunset: 07:51 PM |
Moonrise:02:21 PM Moonset: 10:53 PM Moon Phase ( First Quarter ) |
|
| 20 August 2026 Thursday | Sunny |
16.4 ° C (61.5°F) |
26.4 ° C (79.6°F) |
21.5 ° C (70.8°F) |
% 64 | 36% | 7 | Sunrise:05:58 AM Sunset: 07:49 PM |
Moonrise:03:28 PM Moonset: 11:34 PM Moon Phase ( First Quarter ) |
|
| 21 August 2026 Friday | Sunny |
17.9 ° C (64.2°F) |
29.5 ° C (85.1°F) |
22.3 ° C (72.1°F) |
% 60 | 5% | 7 | Sunrise:05:59 AM Sunset: 07:48 PM |
Moonrise:04:27 PM Moonset: Does not set today Moon Phase ( First Quarter ) |
|