– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 10 pm Wed 09 Sep Local Time

Updates in:

hr min s

Update imminent

Issued: 10 pm Wed 09 Sep Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Light rain (total 2mm), mostly falling on Sat afternoon. Very mild (max 19°C on Wed night, min 9°C on Thu night). Wind will be generally light.										Days 5–7 Weather Summary Light rain (total 2mm), mostly falling on Sat night. Warm (max 21°C on Tue afternoon, min 10°C on Sat night). Wind will be generally light.
		Thursday 10			Friday 11			Saturday 12			Sunday 13			Monday 14
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	some clouds	rain shwrs	rain shwrs	cloudy	cloudy	cloudy	cloudy	light rain	light rain	light rain	light rain	rain shwrs	rain shwrs	rain shwrs	some clouds
Cloud base (m)	5650	1550	800	550	650	6050	4850	2700	1700	2100	450	500	900	550	850	6950
km/h	SSW	WSW	WSW	SW	SW	W	ENE	N	NW	NNW	SW	SW	S	W	NNW	ESE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	0.1	0.5	—	—	—	—	1.8	0.6	0.2	0.4	0.5	0.2	0.1	—
max °C	19	16	17	14	11	16	13	15	16	12	11	12	12	11	14	12
min °C	15	14	16	9	10	15	12	12	14	10	10	11	10	10	13	11
chill °C	15	14	16	9	10	15	12	12	14	10	9	10	9	10	13	11

Freezing level m	4100	3700	3400	2900	2700	2800	2750	2550	2600	2550	2550	2600	3000	3250	3350	3350

	—	6:37	—	—	6:37	—	—	6:39	—	—	6:41	—	—	6:41	—	—
	—	—	7:29	—	—	7:27	—	—	7:24	—	—	7:22	—	—	7:21	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Light rain (total 2mm), mostly falling on Sat afternoon. Very mild (max 19°C on Wed night, min 9°C on Thu night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Light rain (total 2mm), mostly falling on Sat night. Warm (max 21°C on Tue afternoon, min 10°C on Sat 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 30 km WSW 160m alt. 2 hours ago	18°C	Dry	Calm (0 kph at 355).
Black Diamond 32 km SSW 192m alt. 45 minutes ago	27°C	Dry	Light winds from the ESE (13 kph at 115).
Renton Airport 36 km WSW 21m alt. 1 hour ago	19°C	Clear	Calm (0 kph at 0).	16 km
Auburn 39 km SW 119m alt. 1 hour ago		-	Calm (0 kph at 207).
Stampede Pass Airport 40 km SE 1208m alt. 1 hour ago	13°C	Clear	Light winds from the SSW (6 kph at 210).	16 km
Seattl / oeing Airport 44 km WSW 4m alt. 1 hour ago	18°C	Dry and partly cloudy.	Calm (0 kph at 0).	16 km Low: broken
Monroe 44 km NW 80m alt. 2 hours ago	7°C	Dry	Calm (0 kph at 288).
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	19°C	Clear	Wind obs. (6 kph from 300 degs) was rejected.	16 km
Seattle Tacoma International Airport 44 km WSW 136m alt. 1 hour ago	18°C	Dry and partly cloudy.	Light winds from the N (13 kph at 350).	16 km Low: broken
BUOY-EBSW1 46 km W 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.