South Twin Sister
Weather Forecast, United States

 

Days 0-3 South Twin Sister Weather Summary:

Mostly dry. Very mild (max 10°C on Fri afternoon, min 8°C on Thu morning). Wind will be generally light.

Days 3-6 South Twin Sister Weather Summary:

A moderate fall of snow, heaviest on Tue afternoon. Freeze-thaw conditions (max 8°C on Sun morning, min -1°C on Tue night). Winds increasing (light winds from the SW on Sun afternoon, strong winds from the SSW by Mon night).

AM PM night AM PM night AM PM night AM PM night AM PM night AM PM night
partially cloudy
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
snow showers
light snow
snow showers
Wind km/h
15 W15
10 W10
5 W5
10 WSW10
10 SW10
15 WSW15
10 W10
10 WSW10
10 W10
5 WSW5
5 SW5
10 SSW10
10 SSW10
15 S15
40 S40
35 SSW35
25 SW25
10 WSW10
some clouds clear clear clear clear clear clear clear clear clear clear clear clear clear clear snow shwrs light snow snow shwrs
Rain
Rain mm
- - - - - - - - - - - - - - - - - -
Snow
Snow cm
- - - - - - - - - - - - - - - 1 4 6
High °C
8 8 8 9 10 10 9 9 9 8 8 8 7 8 8 3 1 0
Low °C
8 8 8 9 9 9 9 9 8 8 8 7 7 7 5 1 0 -1
Chill °C
5 6 6 8 8 8 7 8 7 6 7 7 5 5 5 -3 -5 -5
Freezing level m
3700 3600 3800 3900 3900 3950 3700 3700 3650 3500 3500 3450 3400 3450 3150 2350 2150 1950
Sea lvl3000ft6000ft9000ft12000ft15000ft
mountain backdrop
8889101099988878831011111112121212131311111110111274317181417191417191517181416181412109
Sunrise
7:31 - - 7:33 - - 7:35 - - 7:37 - - 7:37 - - 7:39 - -
Sunset
- 6:12 - - 6:09 - - 6:08 - - 6:07 - - 6:05 - - 6:02 -

Issued local time.

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.

Live conditions reported by 5 closest weather stations

Weather StationTemp.WeatherWind
Cloud
Visibility
Cloud / Visibility
Lyman
19 km S
155m alt.
2 hours ago
19° C
Dry
2
Calm
(2 kph at 109).
Bellingham
25 km WSW
198m alt.
30 minutes ago
16° C
Dry
2
Calm
(2 kph at 225).
Deming
25 km WNW
102m alt.
2 hours ago
18° C
Dry
0
Calm
(0 kph at 195).
Bellingham
29 km W
71m alt.
34 minutes ago
21° C
Dry
0
Calm
(0 kph at 0).
Bellingham
32 km W
130m alt.
39 minutes ago
15° C
Dry
3
Calm
(3 kph at 167).

* 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. We also include passing Ship data if it is recorded close to South Twin Sister and within an acceptable time window.