– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 10 pm Fri 11 Sep Local Time

Updates in:

hr min s

Update imminent

Issued: 10 pm Fri 11 Sep Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Heavy rain (total 34mm), heaviest during Sun morning. Very mild (max 18°C on Sat morning, min 10°C on Sat night). Wind will be generally light.										Days 5–7 Weather Summary Mostly dry. Warm (max 25°C on Thu afternoon, min 9°C on Mon night). Wind will be generally light.
		Saturday 12			Sunday 13			Monday 14			Tuesday 15			Wednesday 16
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	cloudy	cloudy	some clouds	heavy rain	heavy rain	light rain	light rain	rain shwrs	rain shwrs	clear	some clouds	clear	clear	clear	clear	clear
Cloud base (m)	4750	4450	5550	600	400	400	750	700	950	6550	3450
km/h	E	ESE	WNW	NNW	WSW	SW	SW	WSW	NW	ENE	NNW	NNW	ESE	WNW	NW	ESE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	11	17	4	2	0.2	0.1	—	—	—	—	—	—	—
max °C	13	18	18	14	10	12	12	11	15	11	14	18	14	19	22	17
min °C	13	14	17	10	10	10	10	10	14	9	10	17	13	14	21	15
chill °C	13	14	17	9	8	9	9	10	14	9	10	17	13	14	21	15

Freezing level m	2900	3050	2950	2500	2300	2600	3000	3350	3400	3250	2900	3000	3550	3950	4100	4250

	—	6:39	—	—	6:41	—	—	6:41	—	—	6:43	—	—	6:45	—	—
	—	—	7:24	—	—	7:22	—	—	7:21	—	—	7:19	—	—	7:16	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Heavy rain (total 34mm), heaviest during Sun morning. Very mild (max 18°C on Sat morning, min 10°C on Sat night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Warm (max 25°C on Thu afternoon, min 9°C on Mon 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. 57 minutes ago	13°C	Dry	Calm (0 kph at 38).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Calm (3 kph at 0).
Renton Airport 36 km WSW 218m alt. 3 hours ago	17°C	Clear	Calm (0 kph at 0).	16 km
Auburn 39 km SW 119m alt. 2 hours ago	25°C	Dry	Calm (0 kph at 199).
Stampede Pass Airport 40 km SE 628m alt. 3 hours ago	8°C	Clear	Calm (0 kph at 0).	16 km
Monroe 44 km NW 80m alt. 56 minutes ago	6°C	Dry	Calm (0 kph at 290).
Seattl / oeing Airport 44 km WSW 218m alt. 3 hours ago	17°C	Clear	Calm (0 kph at 0).	16 km
Seattle Tacoma International Airport 44 km WSW 218m alt. 3 hours ago	17°C	Dry and partly cloudy.	Calm (0 kph at 0).	16 km Low: few Mid: scattered High: broken
BUOY-EBSW1 46 km W 3m alt. 1 hour ago
Snohomish 49 km NW 196m alt. 1 hour ago	11°C	Dry	Calm (0 kph at 194).

* 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.