– Lat/Long: 48.71° N 121.99° W
South Twin Sister Weather Forecast
Cascade Range · United StatesIssued: 4 am Mon 14 Sep Local Time
Updates in:
Update imminent hr min s
Issued: 4 am Mon 14 Sep Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–3 Weather SummaryLight rain (total 3mm), mostly falling on Tue afternoon. Very mild (max 10°C on Wed night, min 2°C on Mon night). Wind will be generally light. | Days 4–6 Weather SummaryMostly dry. Very mild (max 11°C on Thu afternoon, min 7°C on Fri morning). Wind will be generally light. | |||||||||||||||||
Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | |  |  | |  |  | |  | | | | | | | |  | | |
rain shwrs | rain shwrs | light rain | light rain | rain shwrs | rain shwrs | clear | clear | clear | clear | clear | clear | clear | clear | clear | clear | some clouds | clear | |
Cloud base (m) | 1800 | 1600 | 6450 | 850 | 1750 | 9200 | 8600 | 6550 | ||||||||||
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | 0.1 | 0.9 | 0.2 | 0.3 | 1.4 | 0.3 | — | — | — | — | — | — | — | — | — | — | — | — |
max °C | 3 | 3 | 4 | 2 | 3 | 6 | 7 | 9 | 10 | 10 | 11 | 11 | 8 | 9 | 9 | 8 | 9 | 10 |
min °C | 3 | 3 | 2 | 2 | 3 | 4 | 7 | 9 | 10 | 10 | 11 | 9 | 7 | 9 | 8 | 7 | 8 | 10 |
chill °C | 1 | 0 | 1 | 2 | 1 | 0 | 6 | 9 | 10 | 10 | 10 | 7 | 6 | 8 | 6 | 5 | 6 | 9 |
Freezing level m | 3250 | 2950 | 2850 | 2500 | 2700 | 3400 | 3700 | 3900 | 3950 | 3900 | 3900 | 3750 | 3750 | 3800 | 3900 | 3800 | 3800 | 3850 |
 | 6:41 | — | — | 6:43 | — | — | 6:45 | — | — | 6:46 | — | — | 6:48 | — | — | 6:48 | — | — |
 | — | 7:22 | — | — | 7:21 | — | — | 7:19 | — | — | 7:16 | — | — | 7:14 | — | — | 7:12 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Light rain (total 3mm), mostly falling on Tue afternoon. Very mild (max 10°C on Wed night, min 2°C on Mon night). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
Mostly dry. Very mild (max 11°C on Thu 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 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 |
|---|---|---|---|---|---|
Skagit Burlingto / t Vernon Airport |  | ||||
Bellingham Airport | | ||||
SHIP8168 | |||||
SHIP8350 |
* 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.