– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 10 am Thu 24 Sep Local Time

Updates in:

hr min s

Update imminent

Issued: 10 am Thu 24 Sep Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Heavy rain (total 22mm), heaviest during Fri afternoon. Very mild (max 17°C on Thu morning, min 7°C on Fri night). Wind will be generally light.									Days 4–6 Weather Summary Moderate rain (total 17mm), heaviest on Tue afternoon. Very mild (max 14°C on Sun afternoon, min 7°C on Sun night). Wind will be generally light.
	Thursday 24			Friday 25			Saturday 26			Sunday 27			Monday 28			Tuesday 29
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	some clouds	some clouds	light rain	rain shwrs	mod. rain	rain shwrs	rain shwrs	some clouds	some clouds	some clouds	clear	some clouds	clear	some clouds	light rain	mod. rain	mod. rain	rain shwrs
Cloud base (m)		3650	600	600	550	550	900		6600		8700	5550	6650	5650	1900	400	400	550
km/h	SE	ESE	S	WSW	SW	SW	W	NNW	E	WNW	NW	NE	WNW	SW	SSW	SW	W	WSW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	3	4	8	7	0.2	—	—	—	—	—	—	—	1.1	6	8	1.7
max °C	17	16	12	13	11	9	10	13	9	12	14	10	12	14	12	11	12	9
min °C	12	16	12	12	9	7	8	13	8	8	14	7	8	14	10	10	11	7
chill °C	12	16	12	12	6	5	8	12	8	8	14	7	8	14	8	8	10	7

Freezing level m	3350	3400	2700	2350	2000	1600	1800	2250	2500	2550	2650	2550	2550	2650	3250	2900	2200	1850

	6:54	—	—	6:56	—	—	6:58	—	—	6:58	—	—	7:01	—	—	7:01	—	—
	—	7:00	—	—	6:59	—	—	6:57	—	—	6:54	—	—	6:52	—	—	6:51	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Heavy rain (total 22mm), heaviest during Fri afternoon. Very mild (max 17°C on Thu morning, min 7°C on Fri night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Moderate rain (total 17mm), heaviest on Tue afternoon. Very mild (max 14°C on Sun afternoon, min 7°C on Sun 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 10 closest weather stations

Weather Station	Temp.	Weather	Wind	Cloud Visibility Cloud / Visibility
Renton Airport 36 km WSW 218m alt. 2 hours ago	13°C	Clear	Light winds from the N (11 kph at 350).	16 km
Auburn 39 km SW 119m alt. 2 hours ago	19°C	Dry	Calm (2 kph at 211).
Monroe 44 km NW 80m alt. 1 hour ago	21°C	Dry	Calm (0 kph at 73).
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	13°C	Dry and partly cloudy.	Light winds from the N (7 kph at 1).	16 km Low: broken
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	13°C	Dry and partly cloudy.	Light winds from the N (19 kph at 10).	16 km Low: few Mid: scattered High: broken
BUOY-EBSW1 46 km W 3m alt. 59 minutes ago
Snohomish 49 km NW 196m alt. 37 minutes ago	14°C	Dry	Calm (5 kph at 318).
Seattle 49 km WSW 100m alt. 1 hour ago		-	Wind obs. (11 kph from 134 degs) was rejected.
BUOY-WPOW1 55 km W 3m alt. 1 hour ago	12°C		Moderate winds from the N (24 kph at 0).
BUOY-TCNW1 57 km SW 3m alt. 1 hour ago

* 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.