– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 10 am Sun 21 Jun Local TimeUpdates in: hr min sUpdate imminent
Issued: 10 am Sun 21 Jun Local Time
Updates in:
Update imminent hr min s
Issued: 10 am Sun 21 Jun Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–3 Weather SummaryMostly dry. Very mild (max 12°C on Mon night, min 5°C on Sun morning). Wind will be generally light. | Days 4–6 Weather SummaryMild with moderate rain (total 11mm) on Thu night, Becoming colder with a light covering of snow, mostly falling on Fri morning. Freeze-thaw conditions (max 9°C on Wed morning, min 0°C on Fri night). Winds increasing (calm on Wed morning, fresh winds from the S by Fri morning). | |||||||||||||||||
Sunday 21 | Monday 22 | Tuesday 23 | Wednesday 24 | Thursday 25 | Friday 26 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | |  |  | | | | | | | |  |  |  | | | |
clear | rain shwrs | clear | clear | some clouds | some clouds | some clouds | some clouds | clear | some clouds | some clouds | some clouds | some clouds | cloudy | mod. rain | light snow | light snow | some clouds | |
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 4 | 5 | — |
mm | — | 0.6 | — | — | — | — | — | — | — | — | — | — | — | — | 9 | 2 | — | — |
max °C | 6 | 8 | 8 | 9 | 11 | 12 | 11 | 12 | 12 | 9 | 9 | 8 | 5 | 5 | 4 | 2 | 2 | 1 |
min °C | 5 | 7 | 8 | 8 | 10 | 11 | 11 | 12 | 10 | 9 | 9 | 5 | 5 | 5 | 3 | 2 | 1 | 0 |
chill °C | 3 | 7 | 8 | 8 | 10 | 10 | 10 | 10 | 9 | 9 | 8 | 2 | 3 | 2 | -3 | -4 | -3 | -5 |
Freezing level m | 3100 | 3250 | 3250 | 3250 | 3500 | 3650 | 3550 | 3650 | 3600 | 3450 | 3400 | 3200 | 3150 | 3050 | 3150 | 2450 | 2350 | 2250 |
Cloud base (m) | 1550 | 2200 | 3000 | 5650 | 8400 | 6550 | 6700 | 8700 | 2500 | 2900 | 550 | 550 | 550 | 700 | ||||
 | 5:05 | — | — | 5:05 | — | — | 5:05 | — | — | 5:05 | — | — | 5:05 | — | — | 5:05 | — | — |
 | — | — | 9:14 | — | — | 9:14 | — | — | 9:14 | — | — | 9:14 | — | — | 9:14 | — | — | 9:14 |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Mostly dry. Very mild (max 12°C on Mon night, min 5°C on Sun morning). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
Mild with moderate rain (total 11mm) on Thu night, Becoming colder with a light covering of snow, mostly falling on Fri morning. Freeze-thaw conditions (max 9°C on Wed morning, min 0°C on Fri night). Winds increasing (calm on Wed morning, fresh winds from the S by Fri morning).
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 |
|---|---|---|---|---|---|
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* 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.