– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 3 am Sun 18 Jan Local TimeUpdates in: hr min sUpdate imminent
Issued: 3 am Sun 18 Jan Local Time
Updates in:
Update imminent hr min s
Issued: 3 am Sun 18 Jan Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–3 Weather SummaryMostly dry. Very mild (max 11°C on Sun morning, min 5°C on Tue afternoon). Wind will be generally light. | Days 4–6 Weather SummaryMostly dry. Freeze-thaw conditions (max 6°C on Wed morning, min -2°C on Thu night). Wind will be generally light. | |||||||||||||||||
Sunday 18 | Monday 19 | Tuesday 20 | Wednesday 21 | Thursday 22 | Friday 23 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | |  | | |  |  |  | | | | | | | | | | | |
clear | clear | clear | clear | clear | some clouds | cloudy | some clouds | some clouds | some clouds | some clouds | some clouds | some clouds | some clouds | clear | clear | some clouds | some clouds | |
km/h | ||||||||||||||||||
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— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | 11 | 10 | 10 | 10 | 9 | 9 | 6 | 6 | 6 | 6 | 6 | 5 | 2 | 1 | -1 | -2 | 0 | 0 |
min °C | 11 | 10 | 9 | 10 | 9 | 7 | 6 | 5 | 5 | 6 | 5 | 2 | 1 | 0 | -2 | -2 | -1 | 0 |
11 | 10 | 9 | 10 | 9 | 6 | 6 | 5 | 5 | 4 | 3 | 1 | 0 | -2 | -2 | -4 | -3 | 0 | |
3400 | 3450 | 3300 | 3350 | 3500 | 3500 | 3400 | 3100 | 3050 | 2750 | 2650 | 2300 | 1900 | 1650 | 1200 | 1200 | 1400 | 1450 | |
Cloud base (m) | 8300 | 8350 | 8750 | 9150 | 6800 | 5600 | 9350 | 6800 | 6650 | 5350 | 4850 | 5550 | 5000 | 5500 | 5550 | 7800 | ||
 | 7:52 | — | — | 7:52 | — | — | 7:50 | — | — | 7:50 | — | — | 7:48 | — | — | 7:48 | — | — |
 | — | 4:44 | — | — | 4:45 | — | — | 4:46 | — | — | 4:47 | — | — | 4:50 | — | — | 4:52 | — |
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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 Sun morning, min 5°C on Tue afternoon). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
Mostly dry. Freeze-thaw conditions (max 6°C on Wed morning, min -2°C on Thu night). Wind will be generally light.
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.