– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 10 am Sat 29 Aug Local TimeUpdates in: hr min sUpdate imminent
Issued: 10 am Sat 29 Aug Local Time
Updates in:
Update imminent hr min s
Issued: 10 am Sat 29 Aug Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–3 Weather SummaryMostly dry. Freeze-thaw conditions (max 10°C on Mon afternoon, min 0°C on Sat morning). Wind will be generally light. | Days 4–6 Weather SummaryMild with moderate rain (total 13mm) on Wed night, Becoming colder with a light covering of snow, mostly falling on Wed night. Freeze-thaw conditions (max 8°C on Tue afternoon, min -1°C on Wed night). Winds decreasing (fresh winds from the SSE on Wed afternoon, calm by Thu night). | |||||||||||||||||
Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | | | |  | |  | | |  |  | |  |  |  | | |
cloudy | rain shwrs | some clouds | cloudy | rain shwrs | some clouds | clear | clear | clear | clear | rain shwrs | light rain | light rain | light rain | mod. snow | light snow | snow shwrs | some clouds | |
Cloud base (m) | 800 | 1850 | 2200 | 1650 | 1650 | 6850 | 9100 | 8750 | 8700 | 5400 | 2050 | 1800 | 750 | 550 | 550 | 600 | 1550 | 2100 |
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 6 | 1 | 2 | — |
mm | — | 0.1 | — | — | 0.2 | — | — | — | — | — | 0.1 | 0.5 | 0.3 | 3 | 10 | — | — | — |
max °C | 0 | 2 | 2 | 2 | 3 | 6 | 7 | 10 | 10 | 7 | 8 | 6 | 3 | 3 | 2 | -1 | 0 | 1 |
min °C | 0 | 1 | 2 | 2 | 3 | 4 | 6 | 9 | 8 | 7 | 7 | 3 | 3 | 2 | -1 | -1 | 0 | 1 |
chill °C | -3 | -3 | -2 | -2 | 0 | 2 | 5 | 7 | 5 | 4 | 4 | -2 | -2 | -4 | -6 | -4 | -3 | -1 |
Freezing level m | 2200 | 2500 | 2550 | 2850 | 3000 | 3400 | 3500 | 3650 | 3600 | 3400 | 3300 | 2850 | 2600 | 2600 | 2350 | 2000 | 2200 | 2250 |
 | 6:20 | — | — | 6:20 | — | — | 6:22 | — | — | 6:24 | — | — | 6:24 | — | — | 6:26 | — | — |
 | — | 7:55 | — | — | 7:53 | — | — | 7:52 | — | — | 7:50 | — | — | 7:47 | — | — | 7:45 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Mostly dry. Freeze-thaw conditions (max 10°C on Mon afternoon, min 0°C on Sat morning). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
Mild with moderate rain (total 13mm) on Wed night, Becoming colder with a light covering of snow, mostly falling on Wed night. Freeze-thaw conditions (max 8°C on Tue afternoon, min -1°C on Wed night). Winds decreasing (fresh winds from the SSE on Wed afternoon, calm by Thu 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 |
|---|---|---|---|---|---|
 | |||||
Bellingham Airport | | ||||
Abbotsford 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.