– Lat/Long: 48.71° N 121.99° W
South Twin Sister Weather Forecast
Cascade Range · United StatesIssued: 10 pm Sun 04 Oct Local Time
Updates in:
Update imminent hr min s
Issued: 10 pm Sun 04 Oct 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 Sun night, min 7°C on Mon morning). Wind will be generally light. | Days 5–7 Weather SummaryA dusting of new snow. Freeze-thaw conditions (max 12°C on Thu afternoon, min -2°C on Sat morning). Winds decreasing (fresh winds from the WSW on Fri afternoon, calm by Sat morning). | |||||||||||||||
Monday 5 | Tuesday 6 | Wednesday 7 | Thursday 8 | Friday 9 | ||||||||||||
night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | | | | | | | | | | | | |  | |
clear | some clouds | clear | clear | clear | some clouds | clear | clear | clear | clear | clear | clear | clear | clear | clear | some clouds | |
Cloud base (m) | 6700 | 950 | 8950 | 5550 | 7950 | 8550 | 8250 | 9350 | 8300 | 9500 | 8300 | 8650 | 900 | 900 | ||
km/h | ||||||||||||||||
 |  |  |  |  |  | |||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
max °C | 11 | 8 | 7 | 7 | 7 | 9 | 10 | 10 | 10 | 11 | 11 | 12 | 12 | 7 | 5 | 3 |
min °C | 9 | 7 | 7 | 7 | 7 | 8 | 9 | 10 | 10 | 10 | 11 | 11 | 9 | 6 | 4 | 0 |
chill °C | 6 | 3 | 4 | 3 | 4 | 6 | 7 | 8 | 8 | 8 | 10 | 10 | 6 | 1 | -1 | -2 |
Freezing level m | 3750 | 3500 | 3550 | 3750 | 3750 | 3850 | 3800 | 4000 | 4050 | 4150 | 4100 | 4100 | 3950 | 3500 | 3100 | 2200 |
 | — | 7:11 | — | — | 7:13 | — | — | 7:15 | — | — | 7:16 | — | — | 7:18 | — | — |
 | — | — | 6:38 | — | — | 6:37 | — | — | 6:35 | — | — | 6:32 | — | — | 6:30 | — |
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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 night, min 7°C on Mon morning). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
A dusting of new snow. Freeze-thaw conditions (max 12°C on Thu afternoon, min -2°C on Sat morning). Winds decreasing (fresh winds from the WSW on Fri afternoon, calm by Sat 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.