– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 9 pm Wed 10 Dec Local Time
Updates in:
hr min s
Update imminent

Issued: 9 pm Wed 10 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 64mm), heaviest during Wed night. Very mild (max 10°C on Sat morning, min 2°C on Wed night). Winds decreasing (gales from the SW on Wed night, light winds from the SSW by Fri night).										Days 5–7 Weather Summary Mild with heavy rain (total 28mm), heaviest during Sun night. Becoming colder with a moderate fall of snow heaviest on Tue afternoon. Freeze-thaw conditions (max 8°C on Sat night, min -1°C on Mon night). Winds increasing (light winds from the SSW on Sun afternoon, gales from the SW by Mon afternoon).
		Thursday 11			Friday 12			Saturday 13			Sunday 14			Monday 15			Tuesday 16
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	heavy rain	mod. rain	light rain	light rain	light rain	light rain	rain shwrs	clear	some clouds	light rain	some clouds	light rain	heavy rain	heavy rain	light rain	snow shwrs	light snow	heavy snow	mod. snow
km/h	WSW	SW	WSW	WSW	WSW	WSW	WSW	SW	SW	SW	SW	SSW	SSW	SSW	SW	WSW	S	SSW	WSW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	2	3	13	6
mm	50	7	1	3	1	1.1	0.5	—	—	0.6	—	0.6	11	11	5	—	—	—	—
max°C	7	3	4	6	6	5	7	10	10	8	6	6	7	8	7	2	1	2	-2
min°C	2	3	3	5	5	5	4	9	9	6	6	6	5	7	6	-1	0	-1	-4
chill°C	-2	-2	-2	0	0	0	1	6	6	1	2	2	-1	1	-1	-8	-6	-10	-15

Freezing level (m)	2600	2050	2400	2600	2950	3150	3450	3250	3000	2650	2400	2350	2750	2800	2550	1250	1300	1700	700
Cloud base (m)	400	450	450	450	450	600	850		8250	3400	1750	1550	400	400	400	400	650	300	400

	—	7:43	—	—	7:45	—	—	7:46	—	—	7:47	—	—	7:48	—	—	7:48	—	—
	—	—	4:15	—	—	4:15	—	—	4:15	—	—	4:15	—	—	4:15	—	—	4:15	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Heavy rain (total 64mm), heaviest during Wed night. Very mild (max 10°C on Sat morning, min 2°C on Wed night). Winds decreasing (gales from the SW on Wed night, light winds from the SSW by Fri night).

Mount Si Weather (Days 3-6):

Mild with heavy rain (total 28mm), heaviest during Sun night. Becoming colder with a moderate fall of snow heaviest on Tue afternoon. Freeze-thaw conditions (max 8°C on Sat night, min -1°C on Mon night). Winds increasing (light winds from the SSW on Sun afternoon, gales from the SW by Mon afternoon).

This table gives the weather forecast for Mount Si at the specific elevation of 1270 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. 51 minutes ago	11° C	Dry	Calm (0 kph at 341).
Black Diamond 32 km SSW 192m alt. 1 hour ago	11° C	Dry	Calm (0 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	14° C	Light rain .	Light winds from the S.(Wind varies from 006 to 011 degs) (13 kph at 190).	5 km Mid: overcast
Auburn 39 km SW 119m alt. 2 hours ago		-	Calm (0 kph at 250).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	8° C	-	Light winds from the W.(Wind varies from 210 to 340 degs) (15 kph at 270).	0.0 km
Seattl / oeing Airport 44 km WSW 218m alt. 3 hours ago	14° C	-	Fresh winds from the S (31 kph at 180).	0.0 km
Seattle Tacoma International Airport 44 km WSW 218m alt. 3 hours ago	13° C	-	Fresh winds from the S (30 kph at 190).	0.0 km
Snohomish 49 km NW 196m alt. 58 minutes ago	11° C	Dry	Light winds from the S (8 kph at 187).
Seattle 49 km WSW 100m alt. 57 minutes ago	12° C	-
SHIP4567 51 km W 15m alt. 4 hours ago			Fresh winds from the S (34 kph at 170).	- km

* 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.