– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 3 pm Sat 10 Jan Local Time
Updates in:
hr min s
Update imminent

Issued: 3 pm Sat 10 Jan Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary A dusting of snow. Milder later with heavy rain (total 33mm) on Sun night. Very mild (max 11°C on Tue morning, min 1°C on Sat night). Winds decreasing (strong winds from the SW on Sun night, calm by Mon night).											Days 5–7 Weather Summary Light rain (total 4mm), mostly falling on Wed afternoon. Very mild (max 11°C on Tue afternoon, min 2°C on Wed night). Winds decreasing (strong winds from the WSW on Wed afternoon, calm by Fri morning).
	Sat 10		Sunday 11			Monday 12			Tuesday 13			Wednesday 14			Thursday 15
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light rain	light snow	light rain	mod. rain	heavy rain	light rain	mod. rain	rain shwrs	clear	clear	clear	clear	light rain	rain shwrs	clear	clear	clear
km/h	SSW	SSW	SW	SSW	SW	SW	WSW	WSW	SW	WSW	SSW	SW	WSW	N	NNW	NNE	ESE
See all weather maps
cm	—	4	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	0.1	—	2	7	14	3	6	0.4	—	—	—	—	3	1.2	—	—	—
max °C	5	2	4	5	7	6	8	8	11	11	11	10	4	5	7	9	10
min °C	2	1	3	5	5	6	7	7	9	10	10	9	4	2	6	8	9
chill °C	-4	-4	-3	-1	1	0	2	3	8	10	10	5	-2	-1	2	8	9

Freezing level m	2100	1450	1950	2400	2600	2500	2750	2950	3300	3550	3600	3300	2100	2050	3050	3250	3250
Cloud base (m)	3000	450	650	450	450	450	450	700	850		9450		500	750		650	8900

	—	—	7:52	—	—	7:50	—	—	7:50	—	—	7:50	—	—	7:48	—	—
	4:36	—	—	4:37	—	—	4:38	—	—	4:39	—	—	4:42	—	—	4:43	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A dusting of snow. Milder later with heavy rain (total 33mm) on Sun night. Very mild (max 11°C on Tue morning, min 1°C on Sat night). Winds decreasing (strong winds from the SW on Sun night, calm by Mon night).

Mount Si Weather (Days 3-6):

Light rain (total 4mm), mostly falling on Wed afternoon. Very mild (max 11°C on Tue afternoon, min 2°C on Wed night). Winds decreasing (strong winds from the WSW on Wed afternoon, calm by Fri morning).

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. 1 hour ago	7° C	Dry	Calm (2 kph at 139).
Black Diamond 32 km SSW 192m alt. 46 minutes ago	12° C	Dry	Wind obs. (18 kph from 360 degs) was rejected.
Renton Airport 36 km WSW 218m alt. 1 hour ago	8° C	Dry and cloudy.	Calm (0 kph at 0).	16 km Low: overcast
Auburn 39 km SW 119m alt. 21 minutes ago	-5° C	-	Calm (0 kph at 317).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	-1° C	Moderate rain .	Calm (0 kph at 0).	16 km
Seattl / oeing Airport 44 km WSW 218m alt. 1 hour ago	8° C	Light rain .	Light winds from the SE (6 kph at 140).	11 km Low: overcast
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	9° C	Dry and cloudy.	Light winds from the SSW (9 kph at 200).	16 km Low: few Mid: broken High: overcast
Snohomish 49 km NW 196m alt. 32 minutes ago	7° C	Dry	Calm (3 kph at 40).
Seattle 49 km WSW 100m alt. 57 minutes ago		-
BUOY-WPOW1 55 km W 3m alt. 1 hour ago	8° C		Moderate winds from the S (26 kph at 170).

* 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.