– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 4 pm Sat 20 Jun Local TimeUpdates in: hr min sUpdate imminent
Issued: 4 pm Sat 20 Jun Local Time
Updates in:
Update imminent hr min s
Issued: 4 pm Sat 20 Jun 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 17°C on Mon afternoon, min 8°C on Sat night). Wind will be generally light. | Days 5–7 Weather SummaryModerate rain (total 11mm), heaviest on Thu night. Very mild (max 17°C on Tue afternoon, min 5°C on Thu night). Wind will be generally light. | ||||||||||||||||
Sat 20 | Sunday 21 | Monday 22 | Tuesday 23 | Wednesday 24 | Thursday 25 | ||||||||||||
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 | some clouds | clear | clear | some clouds | clear | some clouds | some clouds | some clouds | cloudy | mod. rain | |
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | — | — | — | 0.3 | — | — | — | — | — | — | — | — | — | — | — | — | 8 |
max °C | 10 | 10 | 10 | 13 | 14 | 15 | 17 | 17 | 15 | 17 | 16 | 13 | 13 | 13 | 8 | 8 | 7 |
min °C | 10 | 8 | 9 | 12 | 13 | 14 | 16 | 16 | 15 | 17 | 14 | 12 | 12 | 9 | 8 | 8 | 5 |
chill °C | 9 | 6 | 8 | 11 | 12 | 14 | 16 | 16 | 15 | 17 | 14 | 12 | 11 | 8 | 7 | 8 | 1 |
Freezing level m | 3150 | 3050 | 3050 | 3250 | 3350 | 3350 | 3600 | 3700 | 3500 | 3750 | 3650 | 3500 | 3500 | 3600 | 3600 | 3450 | 3150 |
Cloud base (m) | 2350 | 1800 | 2200 | 8850 | 3200 | 5550 | 8450 | 6300 | 5200 | 3200 | 550 | ||||||
 | — | — | 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 17°C on Mon afternoon, min 8°C on Sat night). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
Moderate rain (total 11mm), heaviest on Thu night. Very mild (max 17°C on Tue afternoon, min 5°C on Thu night). Wind will be generally light.
This table gives the weather forecast for South Twin Sister at the specific elevation of 1500 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 | |
* 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.