– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 9 am Thu 20 Nov Local Time
Updates in:
hr min s
Update imminent

Issued: 9 am Thu 20 Nov Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Mostly dry. Very mild (max 11°C on Sat morning, min 4°C on Thu night). Wind will be generally light.									Days 4–6 Weather Summary Mild with moderate rain (total 17mm) on Sun afternoon, Becoming colder with a light covering of snow, mostly falling on Sun night. Freeze-thaw conditions (max 7°C on Sun morning, min -1°C on Mon night). Wind will be generally light.
	Thursday 20			Friday 21			Saturday 22			Sunday 23			Monday 24			Tuesday 25
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	rain shwrs	rain shwrs	some clouds	some clouds	some clouds	some clouds	some clouds	cloudy	light rain	light rain	rain shwrs	light snow	rain shwrs	rain shwrs	some clouds	some clouds	cloudy	light snow
km/h	SSE	NW	SE	SW	S	S	S	SW	SSW	SSW	SW	W	WSW	NW	NE	E	E	SE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	4	—	—	—	—	—	1
mm	0.3	0.2	—	—	—	—	—	—	0.4	5	5	4	1.5	1.6	—	—	—	—
max°C	7	6	5	8	7	8	11	10	9	7	4	3	3	2	0	3	2	1
min°C	5	5	4	7	7	7	10	9	8	6	3	2	2	0	-1	2	2	1
chill°C	5	5	4	7	7	6	10	8	5	2	0	-1	2	0	-1	2	2	-2

Freezing level (m)	1450	1450	1450	2200	2000	2400	2450	2350	1900	1650	1050	850	800	850	300	700	850	700
Cloud base (m)	500	600	950	2150	2400	1000	900	1700	800	600	500	450	450	550	600	450	600	2200

	7:18	—	—	7:20	—	—	7:22	—	—	7:22	—	—	7:24	—	—	7:26	—	—
	—	4:24	—	—	4:23	—	—	4:22	—	—	4:22	—	—	4:22	—	—	4:21	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Very mild (max 11°C on Sat morning, min 4°C on Thu night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mild with moderate rain (total 17mm) on Sun afternoon, Becoming colder with a light covering of snow, mostly falling on Sun night. Freeze-thaw conditions (max 7°C on Sun morning, min -1°C on Mon night). Wind will be generally light.

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. 55 minutes ago	9° C	Dry	Calm (0 kph at 79).
Renton Airport 36 km WSW 218m alt. 2 hours ago	12° C	Dry and partly cloudy.	Light winds from the S (11 kph at 190).	16 km Low: broken
Auburn 39 km SW 119m alt. 55 minutes ago	7° C	Dry	Calm (2 kph at 196).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	1° C	Dry and cloudy.	Calm (0 kph at 0).	16 km Low: few Mid: overcast
SHIP7115 42 km WSW 15m alt. 3 hours ago			Calm (6 kph at 190).	- km
SHIP3348 42 km WSW 15m alt. 2 hours ago			Light winds from the SSE (8 kph at 160).	- km
SHIP540 42 km WSW -m alt. 2 hours ago	13° C	-	Light winds from the S (9 kph at 190).
SHIP9178 42 km WSW 3m alt. 2 hours ago	13° C		Light winds from the S (9 kph at 190).
SHIP6812 42 km WSW 15m alt. 2 hours ago			Calm (6 kph at 200).	- km
SHIP3848 42 km WSW 3m alt. 2 hours ago	13° C		Calm (5 kph at 200).

* 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.