– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 10 pm Thu 21 May Local TimeUpdates in: hr min sUpdate imminent
Issued: 10 pm Thu 21 May Local Time
Updates in:
Update imminent hr min s
Issued: 10 pm Thu 21 May Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–4 Weather SummaryMostly dry. Very mild (max 11°C on Thu night, min 5°C on Sat night). Wind will be generally light. | Days 5–7 Weather SummaryLight rain (total 6mm) at first, then becoming colder with a dusting of snow on Mon night. Freeze-thaw conditions (max 8°C on Sun night, min 0°C on Mon night). Winds decreasing (fresh winds from the S on Mon morning, calm by Wed morning). | ||||||||||||||||||
Friday 22 | Saturday 23 | Sunday 24 | Monday 25 | Tuesday 26 | Wednesday 27 | ||||||||||||||
night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | | |  | |  |  | | |  |  | |  | |  |  |  | | | |
some clouds | some clouds | some clouds | some clouds | some clouds | cloudy | clear | some clouds | cloudy | cloudy | light rain | light rain | light snow | some clouds | snow shwrs | rain shwrs | rain shwrs | some clouds | clear | |
km/h | |||||||||||||||||||
 |  |  |  |  |  |  | |||||||||||||
— | — | — | — | — | — | — | — | — | — | — | — | 3 | — | 1 | — | — | — | — | |
— | — | — | — | — | — | — | — | — | — | 0.5 | 4 | — | — | 0.8 | 0.6 | 0.1 | — | — | |
max °C | 11 | 9 | 11 | 10 | 7 | 8 | 8 | 5 | 8 | 8 | 5 | 2 | 1 | 1 | 3 | 4 | 5 | 7 | 7 |
min °C | 9 | 9 | 11 | 8 | 7 | 8 | 5 | 5 | 7 | 7 | 2 | 2 | 0 | 0 | 2 | 3 | 2 | 6 | 7 |
9 | 9 | 10 | 7 | 6 | 6 | 2 | 4 | 5 | 2 | -4 | -4 | -2 | -2 | 1 | 1 | 2 | 5 | 7 | |
2800 | 2750 | 3000 | 3050 | 2900 | 3050 | 2800 | 2500 | 2650 | 2600 | 1900 | 1850 | 1600 | 1650 | 2000 | 2100 | 2950 | 3400 | 3450 | |
Cloud base (m) | 2800 | 2550 | 6750 | 2100 | 6300 | 6700 | 2800 | 2100 | 550 | 550 | 600 | 750 | 2000 | 1550 | 1750 | 8500 | |||
 | — | 5:18 | — | — | 5:16 | — | — | 5:16 | — | — | 5:15 | — | — | 5:13 | — | — | 5:13 | — | — |
 | — | — | — | 8:51 | — | — | 8:52 | — | — | 8:52 | — | — | 8:53 | — | — | 8:54 | — | — | 8:57 |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Mostly dry. Very mild (max 11°C on Thu night, min 5°C on Sat night). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
Light rain (total 6mm) at first, then becoming colder with a dusting of snow on Mon night. Freeze-thaw conditions (max 8°C on Sun night, min 0°C on Mon night). Winds decreasing (fresh winds from the S on Mon morning, calm by Wed morning).
This table gives the weather forecast for South Twin Sister at the specific elevation of 1500 m. Our advanced weather models allow us to provide distinct weather forecasts for several elevations of South Twin Sister. To see the weather forecasts for the other elevations, use the tab navigation above the table. For a wider overview of the weather, consult the Weather Map of Washington.