– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 4 am Mon 28 Sep Local Time

Updates in:

hr min s

Update imminent

Issued: 4 am Mon 28 Sep Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Moderate rain (total 19mm), heaviest on Tue afternoon. Very mild (max 15°C on Mon afternoon, min 7°C on Wed morning). Wind will be generally light.									Days 4–6 Weather Summary Heavy rain (total 24mm), heaviest during Thu night. Very mild (max 18°C on Sat afternoon, min 11°C on Thu afternoon). Wind will be generally light.
	Monday 28			Tuesday 29			Wednesday 30			Thursday 1			Friday 2			Saturday 3
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	some clouds	some clouds	light rain	light rain	mod. rain	rain shwrs	clear	clear	some clouds	light rain	light rain	heavy rain	rain shwrs	rain shwrs	clear	clear	clear	clear
Cloud base (m)		3000	1700	400	400	450	9150		2950	1850	700	400	450	500		8850
km/h	W	SW	SW	SW	WSW	NNW	NNW	N	SSE	SSW	S	SW	WSW	WNW	E	NE	NNE	E
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	1	4	8	6	—	—	—	0.3	4	13	5	1.6	—	—	—	—
max °C	14	15	12	12	13	12	11	14	13	13	12	14	13	13	12	16	18	14
min °C	10	15	11	12	13	8	7	13	11	12	11	13	13	13	11	11	18	13
chill °C	10	15	9	10	11	8	7	13	11	11	10	13	12	13	11	11	18	13

Freezing level m	2950	2750	3400	3200	3000	2900	3250	3300	3400	3250	2950	2950	2850	3300	3800	4050	4200	4150

	7:01	—	—	7:01	—	—	7:03	—	—	7:05	—	—	7:05	—	—	7:07	—	—
	—	6:52	—	—	6:51	—	—	6:49	—	—	6:46	—	—	6:45	—	—	6:43	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Moderate rain (total 19mm), heaviest on Tue afternoon. Very mild (max 15°C on Mon afternoon, min 7°C on Wed morning). Wind will be generally light.

Mount Si Weather (Days 3-6):

Heavy rain (total 24mm), heaviest during Thu night. Very mild (max 18°C on Sat afternoon, min 11°C on Thu afternoon). 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 190).
Black Diamond 32 km SSW 192m alt. 2 hours ago		-	Calm (5 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	8°C	Clear	Light winds from the SE (6 kph at 130).	16 km
Auburn 39 km SW 119m alt. 2 hours ago	16°C	Dry	Calm (0 kph at 217).
Monroe 44 km NW 80m alt. 1 hour ago		-	Calm (0 kph at 139).
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	8°C	-	Light winds from the SE (7 kph at 140).	16 km Low: few
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	9°C	Dry and partly cloudy.	Light winds from the SSW (6 kph at 210).	16 km Low: few Mid: broken High: broken
BUOY-EBSW1 46 km W 3m alt. 50 minutes ago
Snohomish 49 km NW 196m alt. 1 hour ago	8°C	Dry	Calm (0 kph at 113).
Seattle 49 km WSW 100m alt. 2 hours ago		-	Calm (3 kph at 17).

* 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.