– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 9 pm Wed 17 Dec Local Time
Updates in:
hr min s
Update imminent

Issued: 9 pm Wed 17 Dec Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Heavy rain (total 34mm), mostly on Thu afternoon. Becoming colder with a light covering of snow ,mostly falling on Fri night. Mild temperatures (max 7°C on Thu afternoon, min 1°C on Thu night). Winds increasing (light winds from the SSW on Wed night, fresh winds from the WSW by Thu afternoon).										Days 5–7 Weather Summary Heavy rain (total 21mm), mostly on Sun afternoon. Becoming colder with a light covering of snow, mostly falling on Mon night. Freeze-thaw conditions (max 4°C on Sun morning, min 0°C on Mon night). Wind will be generally light.
		Thursday 18			Friday 19			Saturday 20			Sunday 21			Monday 22			Tuesday 23
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	mod. rain	mod. rain	heavy rain	light snow	light snow	light snow	light snow	light rain	light rain	rain shwrs	light rain	mod. rain	light rain	light snow	light rain	light snow	light rain	cloudy	cloudy
km/h	SSW	SE	SSW	WSW	SW	SW	SW	SSW	SSW	S	S	WSW	SSW	S	SSE	SW	SSW	E	E
See all weather maps
cm	—	—	—	2	1	1	4	—	—	—	—	—	—	1	—	5	—	—	—
mm	6	5	16	4	—	—	—	1.7	1.9	1.3	5	8	4	0.3	1.3	—	0.3	—	—
max°C	3	4	7	6	1	2	2	3	3	3	4	3	2	4	3	2	2	1	1
min°C	2	3	6	1	1	2	1	2	2	2	3	2	2	2	3	0	2	0	0
chill°C	-2	0	1	-5	-4	-3	-3	-2	-1	0	-1	-2	-2	-1	0	-4	0	-2	-3

Freezing level (m)	1050	1100	2400	800	700	750	800	850	950	900	1200	1000	800	900	1150	750	700	750	900
Cloud base (m)	400	350	300	400	450	400	450	400	400	650	550	450	400	400	500	400	500	650	350

	—	7:50	—	—	7:50	—	—	7:50	—	—	7:50	—	—	7:52	—	—	7:52	—	—
	—	—	4:16	—	—	4:16	—	—	4:16	—	—	4:17	—	—	4:17	—	—	4:19	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Heavy rain (total 34mm), mostly on Thu afternoon. Becoming colder with a light covering of snow ,mostly falling on Fri night. Mild temperatures (max 7°C on Thu afternoon, min 1°C on Thu night). Winds increasing (light winds from the SSW on Wed night, fresh winds from the WSW by Thu afternoon).

Mount Si Weather (Days 3-6):

Heavy rain (total 21mm), mostly on Sun afternoon. Becoming colder with a light covering of snow, mostly falling on Mon night. Freeze-thaw conditions (max 4°C on Sun morning, min 0°C on Mon night). Wind will be generally light.

This table gives the weather forecast for Mount Si at the specific elevation of 500 m. Our advanced weather models allow us to provide distinct weather forecasts for several elevations of Mount Si. 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 Station	Temp.	Weather	Wind	Cloud Visibility Cloud / Visibility
Harman Heights wx 6 km SSW 251m alt. 2 hours ago	7° C	Dry	Wind obs. (11 kph from 69 degs) was rejected.
Black Diamond 32 km SSW 192m alt. 46 minutes ago	10° C	Dry	Calm (0 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	7° C	Dry and cloudy.	Light winds from the SSE (9 kph at 150).	16 km Low: broken Mid: overcast
Auburn 39 km SW 119m alt. 1 hour ago	2° C	-	Calm (0 kph at 83).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	-2° C	Mist -.	Light winds from the N (6 kph at 1).	10 km Low: scattered
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	7° C	Light rain .	Light winds from the SSE (15 kph at 160).	13 km Low: few Mid: overcast
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	6° C	Light rain .	Light winds from the SE (15 kph at 140).	13 km Low: overcast
Snohomish 49 km NW 196m alt. 40 minutes ago	8° C	Dry	Light winds from the SSE (13 kph at 159).
Seattle 49 km WSW 100m alt. 1 hour ago	15° C	-
SHIP6850 50 km WSW 3m alt. 1 hour ago	7° C

* 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.