– Lat/Long: 48.71° N 121.99° W
South Twin Sister Weather Forecast
Cascade Range · United StatesIssued: 4 am Sun 13 Sep Local Time
Updates in:
Update imminent hr min s
Issued: 4 am Sun 13 Sep Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–3 Weather SummaryLight rain (total 2mm), mostly falling on Sun afternoon. Mild temperatures (max 7°C on Tue night, min 2°C on Sun morning). Wind will be generally light. | Days 4–6 Weather SummaryMostly dry. Very mild (max 13°C on Thu afternoon, min 8°C on Wed morning). Wind will be generally light. | |||||||||||||||||
Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | | | |  | |  |  | | | | | | | | | |
cloudy | rain shwrs | rain shwrs | rain shwrs | rain shwrs | rain shwrs | some clouds | some clouds | clear | clear | clear | clear | clear | clear | clear | clear | clear | clear | |
Cloud base (m) | 650 | 700 | 800 | 1600 | 950 | 3550 | 2000 | 2150 | 8950 | |||||||||
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | — | 0.8 | 0.6 | 0.1 | 0.4 | 0.1 | — | — | — | — | — | — | — | — | — | — | — | — |
max °C | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 6 | 7 | 8 | 10 | 12 | 12 | 13 | 13 | 10 | 10 | 10 |
min °C | 2 | 2 | 2 | 3 | 3 | 2 | 2 | 4 | 7 | 8 | 10 | 12 | 12 | 12 | 10 | 9 | 10 | 10 |
chill °C | -2 | 0 | -2 | 1 | 0 | -1 | 0 | 1 | 4 | 8 | 10 | 12 | 12 | 12 | 9 | 9 | 10 | 10 |
Freezing level m | 2500 | 2650 | 2800 | 3250 | 2900 | 2750 | 2650 | 2900 | 3550 | 3900 | 4050 | 4100 | 4050 | 4000 | 3950 | 3950 | 3900 | 4050 |
 | 6:41 | — | — | 6:41 | — | — | 6:43 | — | — | 6:45 | — | — | 6:46 | — | — | 6:48 | — | — |
 | — | 7:24 | — | — | 7:22 | — | — | 7:21 | — | — | 7:19 | — | — | 7:16 | — | — | 7:14 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Light rain (total 2mm), mostly falling on Sun afternoon. Mild temperatures (max 7°C on Tue night, min 2°C on Sun morning). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
Mostly dry. Very mild (max 13°C on Thu afternoon, min 8°C on Wed morning). Wind will be generally light.
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 |
|---|---|---|---|---|---|
Skagit Burlingto / t Vernon Airport |  | ||||
Bellingham Airport |  | ||||
SHIP5751 | |||||
SHIP10668 |
* 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.