– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 10 am Mon 05 Oct Local Time

Updates in:

hr min s

Update imminent

Issued: 10 am Mon 05 Oct Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Mostly dry. Warm (max 21°C on Wed afternoon, min 13°C on Mon night). Wind will be generally light.									Days 4–6 Weather Summary Moderate rain (total 11mm), heaviest on Fri night. Warm (max 21°C on Thu afternoon, min 7°C on Sat night). Wind will be generally light.
	Monday 5			Tuesday 6			Wednesday 7			Thursday 8			Friday 9			Saturday 10
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	some clouds	clear	clear	some clouds	some clouds	clear	clear	clear	clear	clear	clear	clear	clear	light rain	mod. rain	rain shwrs	rain shwrs	rain shwrs
Cloud base (m)			9000		8200	9200				9100	9150	8450		650	400	450	600	500
km/h	WNW	WNW	NE	NNW	NNW	NE	NNW	NNW	NNE	NNW	NW	SE	SW	WSW	NW	WSW	W	NE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	0.7	8	0.7	0.3	1.7
max °C	17	18	14	17	19	14	18	21	16	20	21	17	14	14	11	8	9	8
min °C	14	18	13	13	19	13	14	20	15	15	21	14	12	13	8	8	9	7
chill °C	14	18	13	13	19	13	14	20	15	15	21	14	12	12	8	7	8	7

Freezing level m	4000	3950	4100	4100	4100	4150	4050	4100	4200	4150	4150	4150	3650	2850	2000	1700	1650	1600

	7:09	—	—	7:11	—	—	7:13	—	—	7:15	—	—	7:16	—	—	7:16	—	—
	—	6:38	—	—	6:37	—	—	6:35	—	—	6:32	—	—	6:30	—	—	6:29	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Warm (max 21°C on Wed afternoon, min 13°C on Mon night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Moderate rain (total 11mm), heaviest on Fri night. Warm (max 21°C on Thu afternoon, min 7°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
Black Diamond 32 km SSW 192m alt. 44 minutes ago		-	Calm (5 kph at 127).
Renton Airport 36 km WSW 218m alt. 2 hours ago	16°C	Haze -.	Light winds from the SSE (7 kph at 150).	10 km
Auburn 39 km SW 119m alt. 29 minutes ago	24°C	Dry	Calm (0 kph at 279).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	14°C	Clear	Wind obs. (6 kph from 1 degs) was rejected.	16 km
Monroe 44 km NW 80m alt. 20 minutes ago	12°C	Dry	Calm (0 kph at 28).
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	18°C	Dry and partly cloudy.	Wind obs. (6 kph from 220 degs) was rejected.	13 km Low: broken
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	16°C	Dry and partly cloudy.	Calm (0 kph at 0).	11 km Low: scattered Mid: broken High: broken
BUOY-EBSW1 46 km W 3m alt. 1 hour ago
Snohomish 49 km NW 196m alt. 3 hours ago	17°C	Dry	Wind obs. (13 kph from 180 degs) was rejected.
Seattle 49 km WSW 100m alt. 1 hour ago		-	Calm (3 kph at 346).

* 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.