– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 4 pm Mon 18 May Local TimeUpdates in: hr min sUpdate imminent
Issued: 4 pm Mon 18 May Local Time
Updates in:
Update imminent hr min s
Issued: 4 pm Mon 18 May Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–4 Weather SummaryMostly dry. Freeze-thaw conditions (max 5°C on Wed night, min -1°C on Mon night). Wind will be generally light. | Days 5–7 Weather SummaryMostly dry. Mild temperatures (max 8°C on Fri afternoon, min 2°C on Sun morning). Winds increasing (calm on Fri morning, fresh winds from the WSW by Sun morning). | ||||||||||||||||
Mon 18 | Tuesday 19 | Wednesday 20 | Thursday 21 | Friday 22 | Saturday 23 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | | |  | | | | |  | | | | | | | |
some clouds | some clouds | cloudy | some clouds | some clouds | clear | some clouds | some clouds | clear | clear | clear | clear | clear | some clouds | some clouds | clear | clear | |
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | 0 | 0 | -1 | -1 | 1 | 2 | 4 | 5 | 5 | 6 | 6 | 6 | 8 | 8 | 5 | 7 | 6 |
min °C | 0 | -1 | -1 | -1 | 0 | 1 | 3 | 5 | 5 | 6 | 6 | 6 | 7 | 6 | 5 | 6 | 3 |
-4 | -5 | -4 | -5 | -3 | 1 | 1 | 2 | 5 | 4 | 3 | 6 | 6 | 3 | 2 | 3 | -2 | |
2150 | 2050 | 1900 | 2000 | 2450 | 2500 | 2850 | 3200 | 3050 | 3150 | 3200 | 3350 | 3550 | 3350 | 3050 | 3300 | 2900 | |
Cloud base (m) | 2650 | 1950 | 750 | 600 | 950 | 950 | 1800 | 6650 | 5150 | 8850 | 8850 | 8500 | 8600 | 8400 | |||
 | — | — | 5:22 | — | — | 5:20 | — | — | 5:18 | — | — | 5:18 | — | — | 5:16 | — | — |
 | — | 8:45 | — | — | 8:46 | — | — | 8:47 | — | — | 8:50 | — | — | 8:51 | — | — | 8:52 |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Mostly dry. Freeze-thaw conditions (max 5°C on Wed night, min -1°C on Mon night). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
Mostly dry. Mild temperatures (max 8°C on Fri afternoon, min 2°C on Sun morning). Winds increasing (calm on Fri morning, fresh winds from the WSW by Sun morning).
This table gives the weather forecast for South Twin Sister at the specific elevation of 2134 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.