– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 4 am Thu 20 Aug Local TimeUpdates in: hr min sUpdate imminent
Issued: 4 am Thu 20 Aug Local Time
Updates in:
Update imminent hr min s
Issued: 4 am Thu 20 Aug Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–3 Weather SummaryLight rain (total 8mm), mostly falling on Sat afternoon. Very mild (max 18°C on Fri afternoon, min 4°C on Sat night). Winds increasing (calm on Thu morning, strong winds from the SSW by Fri night). | Days 4–6 Weather SummaryLight rain (total 4mm), mostly falling on Sun morning. Very mild (max 12°C on Mon night, min 4°C on Sun morning). Wind will be generally light. | |||||||||||||||||
Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | |  |  |  |  |  |  | | | |  | | | | | |  | |
clear | clear | clear | some clouds | cloudy | light rain | rain shwrs | light rain | light rain | light rain | rain shwrs | rain shwrs | clear | clear | clear | clear | clear | some clouds | |
Cloud base (m) | 4850 | 5500 | 3650 | 800 | 600 | 600 | 600 | 650 | 9200 | 8700 | 9250 | 8650 | ||||||
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | — | — | — | — | — | 0.2 | 0.9 | 3 | 4 | 4 | 0.2 | 0.1 | — | — | — | — | — | — |
max °C | 13 | 15 | 16 | 17 | 18 | 17 | 12 | 9 | 6 | 4 | 6 | 9 | 9 | 11 | 12 | 10 | 11 | 11 |
min °C | 13 | 14 | 16 | 17 | 17 | 14 | 10 | 7 | 4 | 4 | 5 | 7 | 9 | 11 | 10 | 10 | 11 | 9 |
chill °C | 13 | 14 | 16 | 17 | 17 | 14 | 8 | 4 | 0 | 0 | 2 | 4 | 9 | 10 | 9 | 9 | 9 | 7 |
Freezing level m | 4250 | 4350 | 4500 | 4600 | 4450 | 4200 | 4050 | 3600 | 2950 | 3050 | 3600 | 3950 | 3950 | 3950 | 3900 | 3850 | 3850 | 3800 |
 | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — | 6:11 | — | — | 6:13 | — | — | 6:13 | — | — |
 | — | — | 8:14 | — | — | 8:12 | — | — | 8:09 | — | — | 8:07 | — | — | 8:06 | — | — | 8:04 |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Light rain (total 8mm), mostly falling on Sat afternoon. Very mild (max 18°C on Fri afternoon, min 4°C on Sat night). Winds increasing (calm on Thu morning, strong winds from the SSW by Fri night).
South Twin Sister Weather (Days 3-6):
Light rain (total 4mm), mostly falling on Sun morning. Very mild (max 12°C on Mon night, min 4°C on Sun morning). 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 |  | ||||
SHIP6599 |
* 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.