Mountain resort image

South Twin Sister
Weather Forecast, United States

 

South Twin Sister Weather (Days 0-3):

Heavy rain (total 20mm), heaviest during Wed afternoon. Later becoming colder with a dusting of snow on Wed night. Freeze-thaw conditions (max 7°C on Tue afternoon, min 0°C on Thu morning). Winds increasing (calm on Mon night, fresh winds from the SW by Wed afternoon).

(Days 3-6):

A dusting of new snow. Freeze-thaw conditions (max 13°C on Sun afternoon, min 0°C on Thu night). Wind will be generally light.

night AM PM night AM PM night AM PM night AM PM night AM PM night AM PM
rain showers
clear
rain showers
partially cloudy
light rain
moderate rain
snow showers
snow showers
snow showers
snow showers
cloudy
snow showers
partially cloudy
clear
clear
clear
clear
clear
Wind km/h
0 NNW0
5 SW5
10 WSW10
20 SSW20
30 SW30
35 WSW35
35 WSW35
25 WSW25
20 WSW20
10 W10
10 NW10
15 NW15
10 NNE10
10 SSE10
15 S15
15 SSE15
10 SSE10
10 S10
rain shwrs clear rain shwrs some clouds light rain mod. rain snow shwrs snow shwrs snow shwrs snow shwrs cloudy snow shwrs some clouds clear clear clear clear clear
See all weather maps
Rain
Rain mm
3 - 2 - 1 7 7 - - - - - - - - - - -
Snow
Snow cm
- - - - - - 1 1 1 1 - 1 - - - - - -
High °C
6 5 7 7 4 4 4 0 1 1 1 3 6 8 10 11 11 13
Low °C
5 4 6 4 3 4 1 0 0 0 0 1 4 7 9 11 11 12
Chill °C
5 5 5 5 -1 -2 -1 -6 -4 -4 -2 0 4 7 8 9 10 12
Freezing level m
3150 3150 3200 3100 3000 2900 2450 2050 2250 2150 2250 2650 3300 3750 3800 3850 3850 4000
Sea lvl3000ft6000ft9000ft12000ft15000ft
mountain backdrop
65774440111368101111139811116773554781014151517161619171213131114121115141823202325
Sunrise
- 5:22 - - 5:22 - - 5:24 - - 5:24 - - 5:26 - - 5:26 -
Sunset
- - 9:05 - - 9:04 - - 9:02 - - 9:01 - - 9:00 - - 9:00

South Twin Sister Weather (Days 0-3):

The weather forecast for South Twin Sister is: Heavy rain (total 20mm), heaviest during Wed afternoon. Later becoming colder with a dusting of snow on Wed nightFreeze-thaw conditions (max 7°C on Tue afternoon, min 0°C on Thu morning)Winds increasing (calm on Mon night, fresh winds from the SW by Wed afternoon).

South Twin Sister Weather (Days 3-6):

A dusting of new snowFreeze-thaw conditions (max 13°C on Sun afternoon, min 0°C on Thu night)Wind will be generally light.

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.
47 minutes ago
15° C
Dry
0
Calm
(0 kph at 219).
Bellingham
25 km WSW
198m alt.
1 hour ago
15° C
Dry
0
Calm
(0 kph at 225).
Deming
25 km WNW
102m alt.
3 hours ago
17° C
Dry
3
Calm
(3 kph at 113).
Bellingham
27 km WSW
99m alt.
1 hour ago
16° C
Dry
0
Calm
(0 kph at 113).
Bellingham
29 km W
71m alt.
1 hour ago
14° C
Dry
2
Calm
(2 kph at 180).

* 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.