– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 9 am Sat 31 Jan Local Time
Updates in:
hr min s
Update imminent

Issued: 9 am Sat 31 Jan Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Mild with light rain (total 4mm) on Sat night Becoming colder with a light covering of snow, mostly falling on Sun morning. Freeze-thaw conditions (max 9°C on Sat morning, min 0°C on Mon morning). Winds decreasing (strong winds from the SW on Sun morning, light winds from the SW by Mon night).									Days 4–6 Weather Summary Mostly dry. Very mild (max 13°C on Wed morning, min 7°C on Tue morning). Wind will be generally light.
	Saturday 31			Sunday 1			Monday 2			Tuesday 3			Wednesday 4			Thursday 5
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light rain	clear	rain shwrs	mod. snow	snow shwrs	some clouds	light snow	light rain	light rain	some clouds	some clouds	some clouds	some clouds	clear	clear	clear	clear	some clouds
km/h	S	S	S	SSW	WSW	SW	S	WSW	SW	SSE	SSW	SW	SSE	SE	SW	N	ENE	E
See all weather maps
cm	—	—	—	7	1	—	1	—	—	—	—	—	—	—	—	—	—	—
mm	1	—	1.3	—	—	—	—	0.4	0.8	—	—	—	—	—	—	—	—	—
max °C	9	9	8	1	2	1	2	4	6	9	9	10	13	13	10	12	12	12
min °C	8	8	3	1	1	1	0	3	4	7	9	9	12	12	10	11	11	11
chill °C	5	5	-2	-6	-5	-5	-4	-2	2	6	7	7	12	12	10	11	10	10

Freezing level m	2550	2550	2400	1400	1500	1400	1300	1900	2200	2900	2900	3100	3350	3550	3400	3550	3550	3650
Cloud base (m)	1600	5450	5850	700	450	700	1650	500	450	5550	5100		4850	8650				6800

	7:33	—	—	7:31	—	—	7:31	—	—	7:30	—	—	7:28	—	—	7:26	—	—
	—	5:07	—	—	5:07	—	—	5:09	—	—	5:10	—	—	5:13	—	—	5:14	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mild with light rain (total 4mm) on Sat night Becoming colder with a light covering of snow, mostly falling on Sun morning. Freeze-thaw conditions (max 9°C on Sat morning, min 0°C on Mon morning). Winds decreasing (strong winds from the SW on Sun morning, light winds from the SW by Mon night).

Mount Si Weather (Days 3-6):

Mostly dry. Very mild (max 13°C on Wed morning, min 7°C on Tue morning). Wind will be generally light.

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	9° C	Dry	Calm (0 kph at 342).
Renton Airport 36 km WSW 218m alt. 3 hours ago	9° C	Dry and cloudy.	Wind obs. (6 kph from 340 degs) was rejected.	16 km Low: overcast
Auburn 39 km SW 119m alt. 1 hour ago	11° C	Dry	Calm (0 kph at 134).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	3° C	Light rain .	Wind obs. (7 kph from 1 degs) was rejected.	1 km
SHIP1291 43 km W -m alt. 2 hours ago	11° C	-	Calm (4 kph at 300).
SHIP591 43 km W -m alt. 3 hours ago	10° C	-	Calm (4 kph at 220).
SHIP8924 43 km W 15m alt. 4 hours ago			Calm (4 kph at 160).	- km
SHIP1300 43 km W -m alt. 3 hours ago	10° C	-	Calm (4 kph at 220).
SHIP3579 43 km W 15m alt. 3 hours ago			Calm (2 kph at 320).	- km
SHIP8063 43 km W 15m alt. 4 hours ago			Calm (4 kph at 160).	- 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.