– Lat/Long: 48.71° N 121.99° W
South Twin Sister Weather Forecast
Cascade Range · United StatesIssued: 4 am Sun 11 Oct Local Time
Updates in:
Update imminent hr min s
Issued: 4 am Sun 11 Oct Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–3 Weather SummaryMostly dry. Freeze-thaw conditions (max 4°C on Tue night, min -2°C on Sun morning). Wind will be generally light. | Days 4–6 Weather SummaryModerate rain (total 10mm), heaviest on Wed afternoon. Very mild (max 12°C on Fri afternoon, min 4°C on Wed morning). Winds increasing (calm on Wed night, fresh winds from the SSW by Fri night). | |||||||||||||||||
Sunday 11 | Monday 12 | Tuesday 13 | Wednesday 14 | Thursday 15 | Friday 16 | |||||||||||||
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 | cloudy | light rain | light rain | mod. rain | rain shwrs | some clouds | clear | clear | clear | clear | clear | |
Cloud base (m) | 7000 | 2400 | 1700 | 1550 | 650 | 600 | 800 | 9150 | 9450 | 9550 | 9400 | 8350 | ||||||
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | — | — | — | — | — | — | — | — | 0.3 | 3 | 7 | 0.1 | — | — | — | — | — | — |
max °C | -1 | 0 | 1 | 1 | 2 | 3 | 2 | 2 | 4 | 4 | 5 | 6 | 7 | 8 | 10 | 11 | 12 | 12 |
min °C | -2 | 0 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 4 | 4 | 6 | 6 | 7 | 9 | 10 | 11 | 8 |
chill °C | -7 | -4 | -4 | -2 | 0 | 2 | -2 | -2 | -2 | -1 | 0 | 4 | 5 | 5 | 8 | 9 | 10 | 4 |
Freezing level m | 1900 | 2100 | 2500 | 3200 | 3200 | 3200 | 2850 | 2650 | 2850 | 3050 | 3050 | 3600 | 3700 | 3600 | 3800 | 3950 | 3950 | 3750 |
 | 7:20 | — | — | 7:22 | — | — | 7:24 | — | — | 7:26 | — | — | 7:26 | — | — | 7:28 | — | — |
 | — | 6:27 | — | — | 6:24 | — | — | 6:22 | — | — | 6:21 | — | — | 6:19 | — | — | 6:16 | — |
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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 4°C on Tue night, min -2°C on Sun morning). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
Moderate rain (total 10mm), heaviest on Wed afternoon. Very mild (max 12°C on Fri afternoon, min 4°C on Wed morning). Winds increasing (calm on Wed night, fresh winds from the SSW by Fri night).
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.