– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 4 am Sat 12 Sep Local Time

Updates in:

hr min s

Update imminent

Issued: 4 am Sat 12 Sep Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Heavy rain (total 34mm), heaviest during Sun morning. Very mild (max 18°C on Sat morning, min 9°C on Sun morning). Wind will be generally light.									Days 4–6 Weather Summary Mostly dry. Warm (max 25°C on Thu afternoon, min 11°C on Tue morning). Wind will be generally light.
	Saturday 12			Sunday 13			Monday 14			Tuesday 15			Wednesday 16			Thursday 17
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	cloudy	cloudy	mod. rain	heavy rain	mod. rain	rain shwrs	light rain	some clouds	some clouds	clear	clear	clear	clear	clear	clear	clear	clear	clear
Cloud base (m)	4400		550	400	450	750	650	900
km/h	ESE	WNW	W	SW	SW	SW	WSW	WNW	NE	NW	NNW	ESE	WNW	NNW	ESE	ESE	NW	ESE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	9	16	6	1.8	0.2	—	—	—	—	—	—	—	—	—	—	—
max °C	18	18	14	9	11	11	11	15	11	14	18	14	20	22	17	23	25	20
min °C	14	17	10	9	10	10	10	13	10	11	17	13	14	22	15	17	25	17
chill °C	14	17	9	7	8	10	10	13	10	11	17	13	14	22	15	17	25	17

Freezing level m	3050	2900	2450	2250	2550	2950	3400	3400	3300	3100	3150	3600	4000	4100	4300	4350	4450	4450

	6:39	—	—	6:41	—	—	6:41	—	—	6:43	—	—	6:45	—	—	6:46	—	—
	—	7:24	—	—	7:22	—	—	7:21	—	—	7:19	—	—	7:16	—	—	7:15	—

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 9°C on Sun morning). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Warm (max 25°C on Thu afternoon, min 11°C on Tue morning). 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. 1 hour ago	11°C	Dry	Calm (0 kph at 46).
Black Diamond 32 km SSW 192m alt. 58 minutes ago		-	Calm (0 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	13°C	Clear	Light winds from the SE (6 kph at 130).	16 km
Auburn 39 km SW 119m alt. 1 hour ago	17°C	Dry	Calm (0 kph at 274).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	10°C	Dry and partly cloudy.	Calm (0 kph at 0).	16 km Low: scattered
Monroe 44 km NW 80m alt. 54 minutes ago		-	Calm (0 kph at 15).
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	14°C	Clear	Light winds from the N (6 kph at 1).	16 km
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	13°C	Dry and cloudy.	Calm (0 kph at 0).	16 km Low: overcast
BUOY-EBSW1 46 km W 3m alt. 58 minutes ago
Snohomish 49 km NW 196m alt. 40 minutes ago	9°C	Dry	Calm (0 kph at 49).

* 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.