– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 4 pm Sun 27 Sep Local Time

Updates in:

hr min s

Update imminent

Issued: 4 pm Sun 27 Sep Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Moderate rain (total 16mm), heaviest on Tue afternoon. Very mild (max 16°C on Sun afternoon, min 7°C on Tue night). Wind will be generally light.											Days 5–7 Weather Summary Mostly dry. Very mild (max 19°C on Thu afternoon, min 11°C on Wed night). Wind will be generally light.
	Sun 27		Monday 28			Tuesday 29			Wednesday 30			Thursday 1			Friday 2
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	some clouds	clear	rain shwrs	light rain	mod. rain	rain shwrs	clear	some clouds	some clouds	some clouds	some clouds	clear	clear	some clouds	clear
Cloud base (m)	5100		5850	3100	1700	400	400	650	9400		3400	2900	8850				9350
km/h	NW	ESE	W	SW	SSW	SW	WSW	NNW	NNW	NNW	ESE	ENE	NNE	ESE	WSW	WSW	SE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	1	4	7	4	—	—	—	—	—	—	—	—	—
max °C	16	11	13	15	13	12	13	12	11	14	11	17	19	15	18	19	14
min °C	16	9	10	15	11	11	13	7	7	14	11	12	18	14	14	18	11
chill °C	16	9	10	15	9	9	11	6	7	14	11	12	18	14	14	18	11

Freezing level m	2850	3000	2850	2750	3250	3100	2850	2650	3100	3350	3400	3500	3750	3700	3550	3650	4050

	—	—	7:01	—	—	7:01	—	—	7:03	—	—	7:05	—	—	7:05	—	—
	6:54	—	—	6:52	—	—	6:51	—	—	6:49	—	—	6:46	—	—	6:45	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Moderate rain (total 16mm), heaviest on Tue afternoon. Very mild (max 16°C on Sun afternoon, min 7°C on Tue night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Very mild (max 19°C on Thu afternoon, min 11°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. 2 hours ago	14°C	Dry	Calm (0 kph at 314).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Calm (0 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	16°C	Clear	Light winds from the NNW (15 kph at 330).	16 km
Auburn 39 km SW 119m alt. 2 hours ago	19°C	Dry	Calm (0 kph at 217).
Monroe 44 km NW 80m alt. 1 hour ago	14°C	Dry	Calm (0 kph at 178).
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	15°C	Clear	Light winds from the NW (9 kph at 310).	16 km
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	14°C	-	Light winds from the N (13 kph at 350).	16 km Low: few Mid: few
BUOY-EBSW1 46 km W 3m alt. 2 hours ago
Snohomish 49 km NW 196m alt. 2 hours ago	10°C	Dry	Calm (0 kph at 248).
Seattle 49 km WSW 100m alt. 1 hour ago		-

* 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.