– Lat/Long: 48.71° N 121.99° W
South Twin Sister Weather Forecast
Cascade Range · United StatesIssued: 10 am Sat 26 Sep Local Time
Updates in:
Update imminent hr min s
Issued: 10 am Sat 26 Sep 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 4°C on Sun night, min -3°C on Sat morning). Winds increasing (calm on Sat night, strong winds from the SW by Mon night). | Days 4–6 Weather SummaryHeavy rain (total 45mm), heaviest during Tue night. Mild temperatures (max 6°C on Wed night, min 2°C on Thu night). Winds decreasing (strong winds from the SW on Tue morning, light winds from the W by Thu night). | |||||||||||||||||
Saturday 26 | Sunday 27 | Monday 28 | Tuesday 29 | Wednesday 30 | Thursday 1 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | | | | | |  |  |  |  | | | | | |  | |
clear | some clouds | some clouds | some clouds | clear | some clouds | some clouds | some clouds | light rain | light rain | mod. rain | mod. rain | light rain | light rain | mod. rain | light rain | light rain | rain shwrs | |
Cloud base (m) | 650 | 1750 | 6650 | 5600 | 6850 | 2750 | 2800 | 2050 | 550 | 550 | 550 | 650 | 600 | 850 | 750 | 1800 | 600 | |
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | — | — | — | — | — | — | — | — | 0.2 | 5 | 8 | 9 | 0.5 | 3 | 5 | 2 | 2 | 10 |
max °C | -2 | 1 | 3 | 3 | 3 | 4 | 1 | 2 | 3 | 3 | 4 | 4 | 4 | 5 | 6 | 5 | 4 | 3 |
min °C | -3 | 0 | 2 | 2 | 3 | 2 | 1 | 2 | 2 | 3 | 4 | 4 | 4 | 5 | 5 | 5 | 4 | 2 |
chill °C | -8 | -3 | 2 | 2 | 1 | -2 | -4 | -3 | -3 | -4 | -2 | -1 | 0 | 0 | 0 | 0 | -1 | -2 |
Freezing level m | 1700 | 2300 | 2650 | 2600 | 2750 | 2700 | 2300 | 2450 | 3050 | 2950 | 3000 | 2900 | 2800 | 3150 | 3100 | 3100 | 2800 | 2500 |
 | 6:58 | — | — | 7:01 | — | — | 7:01 | — | — | 7:03 | — | — | 7:05 | — | — | 7:05 | — | — |
 | — | 6:58 | — | — | 6:54 | — | — | 6:52 | — | — | 6:51 | — | — | 6:49 | — | — | 6:46 | — |
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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 4°C on Sun night, min -3°C on Sat morning). Winds increasing (calm on Sat night, strong winds from the SW by Mon night).
South Twin Sister Weather (Days 3-6):
Heavy rain (total 45mm), heaviest during Tue night. Mild temperatures (max 6°C on Wed night, min 2°C on Thu night). Winds decreasing (strong winds from the SW on Tue morning, light winds from the W 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 | | ||||
SHIP8270 | |||||
SHIP6218 | |||||
SHIP7343 | |||||
SHIP3758 |
* 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.