– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 am Wed 18 Mar Local Time
Updates in:
hr min s
Update imminent

Issued: 10 am Wed 18 Mar Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Heavy rain (total 67mm), heaviest during Fri afternoon. Freeze-thaw conditions (max 7°C on Wed morning, min -2°C on Fri night). Winds decreasing (strong winds from the SW on Wed night, light winds from the W by Fri night).									Days 4–6 Weather Summary Mostly dry. Freeze-thaw conditions (max 5°C on Mon night, min -4°C on Sat morning). Winds increasing (calm on Sun night, fresh winds from the SSW by Mon night).
	Wednesday 18			Thursday 19			Friday 20			Saturday 21			Sunday 22			Monday 23
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	heavy rain	light rain	mod. rain	mod. rain	light rain	heavy rain	heavy rain	heavy rain	light rain	cloudy	some clouds	some clouds	some clouds	cloudy	some clouds	cloudy	cloudy	light rain
km/h	SW	SW	SW	SW	SW	SSW	SW	SW	WSW	NNW	NW	NW	N	N	E	SSW	SSW	SSW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	10	2	8	5	2	11	10	14	5	—	—	—	—	—	—	—	—	0.6
max °C	7	6	6	6	6	7	6	5	4	-3	-3	-3	0	1	3	4	4	5
min °C	7	6	5	5	5	5	6	4	-2	-4	-4	-3	-2	1	1	3	4	3
chill °C	2	1	-1	-1	-1	0	0	-1	-5	-9	-8	-6	-6	0	1	3	4	-2

Freezing level m	2700	2850	2450	2650	2750	2800	2600	2150	1150	750	900	550	1300	1400	1850	2000	1900	2050
Cloud base (m)	450	400	550	450	500	450	400	400	450	450	450	750	6200	1650	6100	3750	2650	2550

	7:13	—	—	7:11	—	—	7:09	—	—	7:07	—	—	7:05	—	—	7:03	—	—
	—	7:15	—	—	7:16	—	—	7:19	—	—	7:20	—	—	7:22	—	—	7:22	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Heavy rain (total 67mm), heaviest during Fri afternoon. Freeze-thaw conditions (max 7°C on Wed morning, min -2°C on Fri night). Winds decreasing (strong winds from the SW on Wed night, light winds from the W by Fri night).

Mount Si Weather (Days 3-6):

Mostly dry. Freeze-thaw conditions (max 5°C on Mon night, min -4°C on Sat morning). Winds increasing (calm on Sun night, fresh winds from the SSW by Mon night).

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 10 closest weather stations

Weather Station	Temp.	Weather	Wind	Cloud Visibility Cloud / Visibility
Harman Heights wx 6 km SSW 251m alt. 54 minutes ago	14° C	Dry	Calm (5 kph at 132).
Snoqualmie Pass 30 km ESE 824m alt. 1 hour ago	5° C	-	Calm (0 kph at 257).
Grotto wx 35 km NE 321m alt. 46 minutes ago	8° C	Dry	Calm (0 kph at 90).
Renton Airport 36 km WSW 218m alt. 3 hours ago	15° C	Dry and cloudy.	Light winds from the SSW (15 kph at 200).	16 km Low: scattered Mid: broken High: overcast
Grotto wx 39 km NE 1101m alt. 54 minutes ago	4° C	Dry	Calm (0 kph at 308).
Auburn 39 km SW 119m alt. 53 minutes ago		-	Calm (0 kph at 126).
Stampede Pass Airport 40 km SE 628m alt. 3 hours ago	7° C	Light rain .	Light winds from the W.(Wind varies from 230 to 320 degs) (13 kph at 270).	14 km Low: scattered Mid: broken High: overcast
Woodinville 43 km WNW 137.2m alt. 46 minutes ago	14° C	Dry	Wind obs. (10 kph from 316 degs) was rejected.
Seattl / oeing Airport 44 km WSW 218m alt. 3 hours ago	14° C	Dry and cloudy.	Light winds from the S.(Wind varies from 150 to 240 degs) (13 kph at 190).	16 km Low: scattered Mid: overcast
Seattle Tacoma International Airport 44 km WSW 218m alt. 3 hours ago	13° C	Dry and partly cloudy.	Moderate winds from the SSW (22 kph at 200).	16 km Low: few Mid: broken High: broken

* 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.