– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 10 am Sun 24 May Local TimeUpdates in: hr min sUpdate imminent
Issued: 10 am Sun 24 May Local Time
Updates in:
Update imminent hr min s
Issued: 10 am Sun 24 May Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–3 Weather SummaryA light covering of new snow mostly falling on Mon afternoon. Freeze-thaw conditions (max 5°C on Sun afternoon, min -2°C on Mon night). Winds decreasing (gales from the S on Mon morning, light winds from the N by Mon night). | Days 4–6 Weather SummaryMild with light rain (total 4mm) on Fri morning Becoming colder with a light covering of snow, mostly falling on Fri afternoon. Freeze-thaw conditions (max 9°C on Thu afternoon, min -1°C on Fri night). Wind will be generally light. | |||||||||||||||||
Sunday 24 | Monday 25 | Tuesday 26 | Wednesday 27 | Thursday 28 | Friday 29 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  |  |  | | |  | | | | |  | | | | | |
some clouds | clear | some clouds | cloudy | light snow | light snow | light snow | cloudy | rain shwrs | some clouds | some clouds | some clouds | clear | rain shwrs | rain shwrs | light snow | light snow | light snow | |
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
— | — | — | — | 3 | 2 | 1 | — | — | — | — | — | — | — | — | 1 | 3 | 1 | |
— | — | — | — | — | — | — | — | 0.1 | — | — | — | — | 0.1 | 0.1 | 4 | — | — | |
max °C | 3 | 5 | 5 | 1 | -1 | -2 | -1 | 1 | 5 | 6 | 8 | 7 | 7 | 9 | 9 | 3 | 1 | 0 |
min °C | 2 | 4 | 3 | 0 | -1 | -2 | -2 | 0 | 2 | 5 | 8 | 7 | 7 | 9 | 5 | 2 | 0 | -1 |
-2 | 0 | -4 | -9 | -9 | -8 | -5 | -3 | -1 | 3 | 7 | 7 | 7 | 8 | 4 | -1 | -4 | -4 | |
2650 | 2850 | 2800 | 2100 | 1950 | 1700 | 1850 | 2450 | 3750 | 3800 | 3650 | 3550 | 3500 | 3600 | 3600 | 2750 | 2250 | 2000 | |
Cloud base (m) | 2150 | 2900 | 3250 | 2250 | 600 | 600 | 550 | 600 | 6750 | 700 | 1550 | 3200 | 2150 | 600 | 600 | 600 | ||
 | 5:16 | — | — | 5:15 | — | — | 5:13 | — | — | 5:13 | — | — | 5:11 | — | — | 5:11 | — | — |
 | — | — | 8:52 | — | — | 8:53 | — | — | 8:54 | — | — | 8:57 | — | — | 8:58 | — | — | 8:59 |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: A light covering of new snow mostly falling on Mon afternoon. Freeze-thaw conditions (max 5°C on Sun afternoon, min -2°C on Mon night). Winds decreasing (gales from the S on Mon morning, light winds from the N by Mon night).
South Twin Sister Weather (Days 3-6):
Mild with light rain (total 4mm) on Fri morning Becoming colder with a light covering of snow, mostly falling on Fri afternoon. Freeze-thaw conditions (max 9°C on Thu afternoon, min -1°C on Fri night). 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 |
|---|---|---|---|---|---|
 | |||||
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.