– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 10 pm Tue 21 Jul Local TimeUpdates in: hr min sUpdate imminent
Issued: 10 pm Tue 21 Jul Local Time
Updates in:
Update imminent hr min s
Issued: 10 pm Tue 21 Jul Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–4 Weather SummaryMostly dry. Very mild (max 19°C on Wed night, min 10°C on Fri morning). Wind will be generally light. | Days 5–7 Weather SummaryHeavy rain (total 23mm), heaviest during Sun afternoon. Very mild (max 11°C on Fri night, min 3°C on Sun afternoon). Winds decreasing (fresh winds from the S on Sat afternoon, light winds from the WSW by Mon morning). | ||||||||||||||||||
Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | Monday 27 | ||||||||||||||
night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | | |  | | |  | | | | |  |  |  |  | | | |  | |
clear | clear | clear | rain shwrs | clear | clear | clear | clear | clear | clear | clear | light rain | light rain | mod. rain | heavy rain | rain shwrs | clear | clear | some clouds | |
Cloud base (m) | 6350 | 5150 | 6000 | 4950 | 5250 | 2300 | 2000 | 800 | 550 | 600 | 600 | 700 | |||||||
km/h | |||||||||||||||||||
 |  |  |  |  |  |  | |||||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | — | — | — | 0.1 | — | — | — | — | — | — | — | 0.2 | 1.1 | 7 | 11 | 4 | — | — | — |
max °C | 17 | 17 | 18 | 19 | 14 | 13 | 12 | 10 | 12 | 11 | 7 | 7 | 5 | 4 | 4 | 3 | 5 | 8 | 8 |
min °C | 16 | 17 | 18 | 15 | 13 | 13 | 11 | 10 | 12 | 9 | 7 | 5 | 4 | 4 | 3 | 3 | 4 | 7 | 8 |
chill °C | 16 | 17 | 18 | 15 | 13 | 12 | 10 | 9 | 11 | 6 | 3 | 0 | 0 | -2 | -2 | -2 | 2 | 5 | 7 |
Freezing level m | 4550 | 4650 | 4700 | 4550 | 4450 | 4350 | 4250 | 4000 | 4050 | 3700 | 3300 | 3050 | 2850 | 2850 | 2750 | 2850 | 3550 | 3650 | 3750 |
 | — | 5:28 | — | — | 5:28 | — | — | 5:31 | — | — | 5:31 | — | — | 5:33 | — | — | 5:33 | — | — |
 | — | — | — | 8:59 | — | — | 8:58 | — | — | 8:57 | — | — | 8:54 | — | — | 8:53 | — | — | 8:52 |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Mostly dry. Very mild (max 19°C on Wed night, min 10°C on Fri morning). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
Heavy rain (total 23mm), heaviest during Sun afternoon. Very mild (max 11°C on Fri night, min 3°C on Sun afternoon). Winds decreasing (fresh winds from the S on Sat afternoon, light winds from the WSW by Mon 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 |
|---|---|---|---|---|---|
 | |||||
Bellingham Airport |  | ||||
BUOY-46118 | |||||
SHIP8056 | |||||
SHIP2386 | |||||
SHIP2367 | |||||
SHIP7631 |
* 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.