– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 10 am Wed 30 Sep Local Time

Updates in:

hr min s

Update imminent

Issued: 10 am Wed 30 Sep Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Mostly dry. Very mild (max 19°C on Fri afternoon, min 9°C on Wed morning). Wind will be generally light.									Days 4–6 Weather Summary Mostly dry. Warm (max 22°C on Sun afternoon, min 11°C on Mon night). Wind will be generally light.
	Wednesday 30			Thursday 1			Friday 2			Saturday 3			Sunday 4			Monday 5
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	some clouds	some clouds	some clouds	clear	clear	rain shwrs	rain shwrs	some clouds	clear	clear	clear	clear	clear	clear	clear	clear
Cloud base (m)	8500	5150	3000	2700	2150		1800	1950	750	8150			9250	8500		6450	8750	9250
km/h	NNW	NNW	SE	SSW	SW	S	WSW	W	ENE	ESE	N	ESE	ESE	WNW	SE	WNW	WNW	ENE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	0.1	0.4	—	—	—	—	—	—	—	—	—
max °C	12	15	12	16	18	14	17	19	15	17	21	16	20	22	16	18	19	14
min °C	9	14	10	12	18	12	13	17	12	13	20	15	15	21	14	14	18	11
chill °C	9	14	10	12	18	12	13	17	12	13	20	15	15	21	14	14	18	11

Freezing level m	3250	3300	3300	3450	3500	3450	3300	3300	3950	3950	4000	4100	4150	4100	4050	3800	3500	3900

	7:03	—	—	7:05	—	—	7:05	—	—	7:07	—	—	7:09	—	—	7:09	—	—
	—	6:49	—	—	6:46	—	—	6:45	—	—	6:43	—	—	6:40	—	—	6:38	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Very mild (max 19°C on Fri afternoon, min 9°C on Wed morning). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Warm (max 22°C on Sun afternoon, min 11°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 Airport 36 km WSW 218m alt. 2 hours ago	14°C	Dry and partly cloudy.	Light winds from the N (9 kph at 1).	16 km Low: broken
Auburn 39 km SW 119m alt. 3 hours ago	18°C	Dry	Calm (2 kph at 215).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	4°C	Clear	Wind obs. (7 kph from 220 degs) was rejected.	16 km
SHIP10376 43 km W 15m alt. 3 hours ago				- km
Monroe 44 km NW 80m alt. 29 minutes ago	20°C	Dry	Calm (0 kph at 5).
SHIP5357 43 km W 15m alt. 3 hours ago				- km
SHIP8195 43 km W 3m alt. 2 hours ago	15°C
SHIP7175 43 km W 15m alt. 3 hours ago				- km
SHIP3682 43 km W 15m alt. 3 hours ago				- km
SHIP9641 43 km W 15m alt. 1 hour ago				- km

* 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.