– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 4 am Tue 09 Jun Local TimeUpdates in: hr min sUpdate imminent
Issued: 4 am Tue 09 Jun Local Time
Updates in:
Update imminent hr min s
Issued: 4 am Tue 09 Jun Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–3 Weather SummaryMild with moderate rain (total 17mm) on Tue morning, Becoming colder with a light covering of snow, mostly falling on Tue night. Freeze-thaw conditions (max 9°C on Thu afternoon, min 0°C on Tue night). Wind will be generally light. | Days 4–6 Weather SummaryMostly dry. Warm (max 20°C on Sun afternoon, min 7°C on Fri morning). Wind will be generally light. | |||||||||||||||||
Tuesday 9 | Wednesday 10 | Thursday 11 | Friday 12 | Saturday 13 | Sunday 14 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  |  |  |  | |  | | | | | | | | |  | |
heavy rain | light rain | light snow | light snow | rain shwrs | rain shwrs | clear | clear | clear | clear | clear | clear | clear | clear | clear | clear | clear | some clouds | |
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
— | — | 4 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
12 | 4 | — | — | 0.4 | 0.2 | — | — | — | — | — | — | — | — | — | — | — | — | |
max °C | 3 | 2 | 1 | 1 | 3 | 4 | 6 | 9 | 9 | 8 | 10 | 11 | 13 | 16 | 17 | 18 | 20 | 20 |
min °C | 2 | 2 | 0 | 0 | 2 | 4 | 4 | 9 | 8 | 7 | 10 | 10 | 12 | 15 | 17 | 17 | 19 | 18 |
-3 | -3 | -6 | -4 | 2 | 4 | 3 | 9 | 7 | 6 | 8 | 10 | 11 | 15 | 17 | 17 | 19 | 18 | |
1850 | 1850 | 1600 | 1650 | 2650 | 3200 | 2950 | 2950 | 3150 | 3000 | 3250 | 3450 | 3650 | 3950 | 4100 | 4100 | 4400 | 4450 | |
Cloud base (m) | 600 | 650 | 600 | 600 | 750 | 8950 | 8700 | 9000 | ||||||||||
 | 5:05 | — | — | 5:05 | — | — | 5:05 | — | — | 5:03 | — | — | 5:03 | — | — | 5:03 | — | — |
 | — | — | 9:07 | — | — | 9:08 | — | — | 9:09 | — | — | 9:09 | — | — | 9:10 | — | — | 9:10 |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Mild with moderate rain (total 17mm) on Tue morning, Becoming colder with a light covering of snow, mostly falling on Tue night. Freeze-thaw conditions (max 9°C on Thu afternoon, min 0°C on Tue night). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
Mostly dry. Warm (max 20°C on Sun afternoon, min 7°C on Fri morning). Wind will be generally light.
This table gives the weather forecast for South Twin Sister at the specific elevation of 1500 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.