– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 4 pm Sun 25 Oct Local Time

Updates in:

hr min s

Update imminent

Issued: 4 pm Sun 25 Oct Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Heavy rain (total 25mm), heaviest during Tue night. Very mild (max 10°C on Sun afternoon, min 5°C on Tue night). Wind will be generally light.											Days 5–7 Weather Summary Light rain (total 8mm), mostly falling on Wed night. Mild temperatures (max 9°C on Thu afternoon, min 4°C on Wed night). Wind will be generally light.
	Sun 25		Monday 26			Tuesday 27			Wednesday 28			Thursday 29			Friday 30
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	rain shwrs	light rain	light rain	light rain	mod. rain	light rain	light rain	mod. rain	light rain	light rain	rain shwrs	clear	cloudy	light rain	some clouds	rain shwrs	rain shwrs
Cloud base (m)	700	1550	450	500	400	600	700	400	500	600	650	1650	1450	750	800	1500	1700
km/h	ESE	E	W	WNW	SW	SSW	WSW	SW	SW	SSE	ESE	ESE	ESE	ESE	SE	NW	ESE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	2	0.6	3	1.4	6	0.6	1.2	9	1.6	4	3	—	—	0.7	—	0.7	0.4
max °C	10	8	8	8	7	6	7	6	6	7	5	8	9	7	8	9	6
min °C	9	7	7	7	6	6	6	5	5	6	4	4	8	6	5	8	4
chill °C	7	5	7	6	4	4	3	2	3	6	2	1	6	4	3	8	2

Freezing level m	2100	1950	1700	1600	1600	1250	1450	1250	1350	1350	1350	1550	1700	1500	1650	1650	1650

	—	—	7:41	—	—	7:41	—	—	7:43	—	—	7:45	—	—	7:47	—	—
	6:00	—	—	5:59	—	—	5:58	—	—	5:55	—	—	5:53	—	—	5:52	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Heavy rain (total 25mm), heaviest during Tue night. Very mild (max 10°C on Sun afternoon, min 5°C on Tue night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Light rain (total 8mm), mostly falling on Wed night. Mild temperatures (max 9°C on Thu afternoon, min 4°C on Wed 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. 33 minutes ago	8°C	Dry	Calm (0 kph at 34).
Renton Airport 36 km WSW 218m alt. 2 hours ago	11°C	Dry and partly cloudy.	Calm (0 kph at 0).	16 km Low: broken
Auburn 39 km SW 119m alt. 32 minutes ago	9°C	Dry	Calm (0 kph at 33).
Stampede Pass Airport 40 km SE 628m alt. 1 hour ago	2°C	-	Calm (0 kph at 0).	0.0 km High: broken
SHIP3800 42 km WSW 15m alt. 3 hours ago				- km
SHIP2288 42 km WSW 3m alt. 3 hours ago
SHIP3240 42 km WSW 15m alt. 2 hours ago				- km
Monroe 44 km NW 80m alt. 1 hour ago	2°C	-	Calm (0 kph at 205).
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	11°C	Dry and cloudy.	Calm (0 kph at 0).	16 km Low: overcast
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	12°C	Dry and cloudy.	Light winds from the ESE (15 kph at 110).	16 km Low: overcast

* 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.