– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 3 am Sun 04 Jan Local Time
Updates in:
hr min s
Update imminent

Issued: 3 am Sun 04 Jan Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary A dusting of snow. Milder later with heavy rain (total 28mm) on Tue morning. Mild temperatures (max 5°C on Sun morning, min 1°C on Tue night). Winds increasing (light winds from the SSW on Sun afternoon, fresh winds from the SW by Tue morning).									Days 4–6 Weather Summary A light covering of new snow mostly falling on Wed afternoon. Becoming milder with light rain (total 5mm) on Thu afternoon. Mild temperatures (max 5°C on Fri morning, min 1°C on Wed morning). Winds decreasing (fresh winds from the SSW on Wed afternoon, calm by Fri morning).
	Sunday 4			Monday 5			Tuesday 6			Wednesday 7			Thursday 8			Friday 9
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	mod. rain	rain shwrs	rain shwrs	rain shwrs	light rain	light snow	mod. rain	mod. rain	light snow	light snow	light snow	light snow	light snow	light rain	light rain	light rain	some clouds	some clouds
km/h	SW	SSW	SSW	SW	SW	SW	SSW	SW	WSW	SW	SSW	WSW	WSW	SW	SW	SW	SSE	SSE
See all weather maps
cm	—	—	—	—	—	1	—	—	2	2	4	1	1	—	—	—	—	—
mm	6	4	2	2	1.2	—	6	5	—	—	—	—	—	2	2	0.3	—	—
max °C	5	5	3	3	3	2	3	3	1	2	2	1	2	3	4	5	4	5
min °C	5	4	2	3	2	2	2	2	1	1	2	1	1	2	3	4	4	4
chill °C	1	1	-2	0	-1	-1	-3	-3	-5	-4	-4	-4	-4	-3	-1	2	3	2

Freezing level m	1350	1150	1000	850	850	750	850	850	600	700	800	600	700	850	1050	1250	1550	2200
Cloud base (m)	450	450	700	400	450	500	400	400	400	450	400	450	450	450	600	500	1000

	7:54	—	—	7:54	—	—	7:54	—	—	7:52	—	—	7:52	—	—	7:52	—	—
	—	4:29	—	—	4:30	—	—	4:31	—	—	4:32	—	—	4:34	—	—	4:35	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A dusting of snow. Milder later with heavy rain (total 28mm) on Tue morning. Mild temperatures (max 5°C on Sun morning, min 1°C on Tue night). Winds increasing (light winds from the SSW on Sun afternoon, fresh winds from the SW by Tue morning).

Mount Si Weather (Days 3-6):

A light covering of new snow mostly falling on Wed afternoon. Becoming milder with light rain (total 5mm) on Thu afternoon. Mild temperatures (max 5°C on Fri morning, min 1°C on Wed morning). Winds decreasing (fresh winds from the SSW on Wed afternoon, calm by Fri morning).

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. 3 hours ago	8° C	Dry	Wind obs. (8 kph from 49 degs) was rejected.
Black Diamond 32 km SSW 192m alt. 3 hours ago		-	Calm (0 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	8° C	Dry and cloudy.	Light winds from the SSE (7 kph at 150).	16 km Low: few Mid: overcast
Auburn 39 km SW 119m alt. 2 hours ago	0° C	-	Calm (0 kph at 136).
Stampede Pass Airport 40 km SE 628m alt. 1 hour ago	-1° C	Freezing moderate rain freezing.	Calm (0 kph at 0).	0 km
SHIP2700 43 km W 15m alt. 3 hours ago			Light winds from the ESE (8 kph at 120).	- km
SHIP8719 43 km W 3m alt. 2 hours ago	10° C		Calm (5 kph at 180).
SHIP7587 43 km W 15m alt. 2 hours ago			Calm (6 kph at 180).	- km
SHIP3599 43 km W 15m alt. 2 hours ago			Calm (2 kph at 80).	- km
SHIP4818 43 km W 15m alt. 3 hours ago			Light winds from the SE (8 kph at 130).	- 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.