– Lat/Long: 48.71° N 121.99° W
South Twin Sister Weather Forecast
Cascade Range · United StatesIssued: 10 pm Mon 05 Oct Local Time
Updates in:
Update imminent hr min s
Issued: 10 pm Mon 05 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 Tue night, min 7°C on Mon night). Wind will be generally light. | Days 5–7 Weather SummaryDrizzle at first, then turning colder with dusting of snow on Fri morning. Freeze-thaw conditions (max 10°C on Thu night, min -4°C on Fri night). Winds decreasing (strong winds from the W on Fri morning, calm by Fri night). | |||||||||||||||
Tuesday 6 | Wednesday 7 | Thursday 8 | Friday 9 | Saturday 10 | ||||||||||||
night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  | | |  | | | | |  |  |  |  |  | | | |
clear | some clouds | some clouds | clear | clear | clear | clear | clear | clear | some clouds | light snow | cloudy | snow shwrs | snow shwrs | snow shwrs | clear | |
Cloud base (m) | 7150 | 5850 | 8200 | 8350 | 9250 | 8950 | 8700 | 550 | 650 | 750 | 600 | 750 | 600 | |||
km/h | ||||||||||||||||
 |  |  |  |  |  | |||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | 1 | — | 1 | 1 | 1 | — |
mm | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — |
max °C | 8 | 8 | 10 | 11 | 11 | 11 | 11 | 11 | 10 | 10 | 3 | -1 | -3 | -4 | -3 | -2 |
min °C | 7 | 8 | 8 | 10 | 11 | 11 | 11 | 11 | 10 | 4 | 1 | -1 | -4 | -4 | -4 | -3 |
chill °C | 3 | 5 | 6 | 8 | 9 | 9 | 9 | 9 | 8 | -2 | -6 | -7 | -9 | -4 | -8 | -8 |
Freezing level m | 3850 | 3800 | 3850 | 3950 | 3950 | 3950 | 4000 | 4050 | 3900 | 3450 | 2350 | 1950 | 1450 | 1450 | 1750 | 1700 |
 | — | 7:13 | — | — | 7:15 | — | — | 7:16 | — | — | 7:18 | — | — | 7:20 | — | — |
 | — | — | 6:37 | — | — | 6:35 | — | — | 6:32 | — | — | 6:30 | — | — | 6:29 | — |
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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 Tue night, min 7°C on Mon night). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
Drizzle at first, then turning colder with dusting of snow on Fri morning. Freeze-thaw conditions (max 10°C on Thu night, min -4°C on Fri night). Winds decreasing (strong winds from the W on Fri morning, calm 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.
| Weather Station | Temp. | Weather | Wind | Gusts | Cloud / Visibility |
|---|---|---|---|---|---|
SHIP1376 | |||||
Skagit Burlingto / t Vernon Airport |  | ||||
Bellingham Airport | | ||||
SHIP4247 | |||||
SHIP2757 | |||||
Skagit Burlingto / t Vernon Airport | | ||||
Bellingham Airport | |
* NOTE: not all weather observatories update at the same frequency which is the reason why some locations may show data from stations that are further away than known closer ones.