– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 pm Thu 19 Mar Local Time
Updates in:
hr min s
Update imminent

Issued: 10 pm Thu 19 Mar Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Heavy rain (total 51mm), heaviest during Fri morning. Freeze-thaw conditions (max 11°C on Thu night, min 0°C on Sat night). Wind will be generally light.										Days 5–7 Weather Summary Mild with heavy rain (total 27mm), heaviest during Tue morning. Becoming colder with a moderate fall of snow heaviest on Tue night. Freeze-thaw conditions (max 7°C on Mon afternoon, min 0°C on Tue night). Winds increasing (calm on Sun night, strong winds from the SW by Tue night).
		Friday 20			Saturday 21			Sunday 22			Monday 23			Tuesday 24			Wednesday 25
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	heavy rain	heavy rain	heavy rain	light rain	cloudy	rain shwrs	rain shwrs	some clouds	some clouds	cloudy	cloudy	some clouds	light rain	heavy rain	mod. rain	mod. snow	light snow	light snow	snow shwrs
km/h	SW	WSW	WSW	WSW	NW	WNW	S	WSW	WNW	ESE	W	NW	SSW	S	S	SW	WSW	NNW	E
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	7	1	2	5
mm	20	17	12	1.3	—	0.7	0.1	—	—	—	—	—	0.7	15	5	3	—	4	—
max °C	11	10	10	7	1	3	2	5	7	4	5	7	5	5	7	5	1	2	0
min °C	10	10	9	3	1	3	0	1	7	2	2	6	3	3	6	0	0	1	-5
chill °C	8	7	7	1	-1	2	-2	1	6	2	2	5	0	0	2	-7	-6	0	-8

Freezing level m	2850	2350	1950	1150	700	850	600	1150	1250	1550	1300	1250	1650	1650	1600	550	650	650	0
Cloud base (m)	400	400	400	550	450	550	550	500	900		550	750	2550	400	550	400	450	450	800

	—	7:09	—	—	7:07	—	—	7:05	—	—	7:03	—	—	7:01	—	—	7:00	—	—
	—	—	7:19	—	—	7:20	—	—	7:22	—	—	7:22	—	—	7:23	—	—	7:25	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Heavy rain (total 51mm), heaviest during Fri morning. Freeze-thaw conditions (max 11°C on Thu night, min 0°C on Sat night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mild with heavy rain (total 27mm), heaviest during Tue morning. Becoming colder with a moderate fall of snow heaviest on Tue night. Freeze-thaw conditions (max 7°C on Mon afternoon, min 0°C on Tue night). Winds increasing (calm on Sun night, strong winds from the SW by Tue night).

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 10 closest weather stations

Weather Station	Temp.	Weather	Wind	Cloud Visibility Cloud / Visibility
Harman Heights wx 6 km SSW 251m alt. 1 hour ago	12° C	Dry	Calm (0 kph at 124).
Snoqualmie Pass 30 km ESE 824m alt. 24 minutes ago	4° C	-	Calm (0 kph at 267).
Black Diamond 32 km SSW 192m alt. 3 hours ago		-	Calm (0 kph at 0).
Grotto wx 35 km NE 321m alt. 1 hour ago	6° C	Dry	Calm (2 kph at 94).
Renton Airport 36 km WSW 218m alt. 2 hours ago	13° C	Dry and cloudy.	Calm (0 kph at 0).	16 km Low: overcast
Grotto wx 39 km NE 1101m alt. 53 minutes ago	6° C	Dry	Calm (2 kph at 268).
Auburn 39 km SW 119m alt. 1 hour ago	3° C	Dry	Calm (0 kph at 347).
Stampede Pass Airport 40 km SE 628m alt. 1 hour ago	7° C	Light rain .	Light winds from the W (13 kph at 280).	10 km Mid: broken High: overcast
Woodinville 43 km WNW 137.2m alt. 19 minutes ago	8° C	Dry	Calm (0 kph at 296).
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	13° C	Dry and cloudy.	Light winds from the S (9 kph at 190).	16 km Low: overcast

* 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.