– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 9 pm Tue 10 Nov Local Time

Updates in:

hr min s

Update imminent

Issued: 9 pm Tue 10 Nov Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Light rain (total 4mm), mostly falling on Fri afternoon. Very mild (max 17°C on Wed morning, min 9°C on Fri afternoon). Winds increasing (calm on Wed night, fresh winds from the SE by Fri morning).										Days 5–7 Weather Summary Heavy rain (total 37mm), heaviest during Fri night. Very mild (max 10°C on Sat morning, min 6°C on Sun night). Wind will be generally light.
		Wednesday 11			Thursday 12			Friday 13			Saturday 14			Sunday 15
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	rain shwrs	some clouds	some clouds	some clouds	cloudy	some clouds	cloudy	cloudy	light rain	rain shwrs	rain shwrs	rain shwrs	mod. rain	mod. rain	mod. rain	light rain
Cloud base (m)	3000	6050		6400	6450	5950	5550	5000	2050	400	700	1700	1800	450	400	600
km/h	SSE	SSE	SSE	SE	ESE	SE	SE	SE	ESE	SE	SSW	SE	SE	SSE	S	SSW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	0.6	—	—	—	—	—	—	—	3	9	1.7	0.7	9	6	6	1.6
max °C	12	17	15	12	16	15	13	14	11	8	10	9	8	8	7	7
min °C	11	14	13	11	13	13	12	13	9	7	9	8	8	8	7	6
chill °C	10	14	12	11	13	12	10	12	8	6	8	6	6	5	6	4

Freezing level m	3000	3200	3050	3150	2950	2950	3050	2800	2200	1950	1700	1800	2250	2100	1750	1500

	—	7:05	—	—	7:07	—	—	7:09	—	—	7:09	—	—	7:11	—	—
	—	—	4:35	—	—	4:34	—	—	4:31	—	—	4:30	—	—	4:30	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Light rain (total 4mm), mostly falling on Fri afternoon. Very mild (max 17°C on Wed morning, min 9°C on Fri afternoon). Winds increasing (calm on Wed night, fresh winds from the SE by Fri morning).

Mount Si Weather (Days 3-6):

Heavy rain (total 37mm), heaviest during Fri night. Very mild (max 10°C on Sat morning, min 6°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 30 km WSW 160m alt. 2 hours ago	13°C	Dry	Calm (0 kph at 103).
Renton Airport 36 km WSW 218m alt. 2 hours ago	14°C	Dry and cloudy.	Wind obs. (9 kph from 1 degs) was rejected.	16 km Low: scattered Mid: broken High: overcast
Auburn 39 km SW 119m alt. 1 hour ago	2°C	-	Calm (0 kph at 309).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	5°C	Fog -.	Wind obs. (6 kph from 1 degs) was rejected.	0 km
SeattleS.-Tacoma-Wa. 43 km WSW 137m alt. 2 hours ago	13°C	-	Light winds from the ESE (15 kph at 110).	36 km Mid: mostly cloudy
SHIP1828 43 km W -m alt. 3 hours ago	13°C	-	Light winds from the SSW (7 kph at 200).
SHIP6600 43 km W 3m alt. 3 hours ago	13°C		Calm (5 kph at 170).
SHIP9874 43 km W 15m alt. 2 hours ago			Calm (2 kph at 350).	- km
SHIP10802 43 km W 3m alt. 3 hours ago	13°C		Calm (4 kph at 190).
SHIP1206 43 km W -m alt. 2 hours ago	13°C	-	Calm (4 kph at 270).

* 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.