– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 4 pm Fri 02 Oct Local Time

Updates in:

hr min s

Update imminent

Issued: 4 pm Fri 02 Oct Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Mostly dry. Warm (max 22°C on Sun afternoon, min 13°C on Fri night). Wind will be generally light.											Days 5–7 Weather Summary Mostly dry. Very mild (max 19°C on Mon afternoon, min 12°C on Mon night). Wind will be generally light.
	Fri 2		Saturday 3			Sunday 4			Monday 5			Tuesday 6			Wednesday 7
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	some clouds	some clouds	clear	clear	clear	clear	clear	clear	some clouds	some clouds	clear	clear	clear	clear	clear	clear	clear
Cloud base (m)	950		6150	9000		9650	9500	9350		7150	8300	8900
km/h	WNW	E	E	N	ESE	SW	W	SE	WNW	WNW	N	NNW	NNW	NE	NNW	NNW	NE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	18	14	19	21	17	21	22	17	17	19	14	16	18	13	17	19	15
min °C	18	13	14	21	15	16	22	14	14	18	12	12	17	12	12	19	14
chill °C	18	13	14	21	15	16	22	14	14	18	12	12	17	12	12	19	14

Freezing level m	3850	4150	4200	4200	4250	4200	4200	4150	3950	3800	3950	4050	4150	4150	3950	3850	4000

	—	—	7:07	—	—	7:09	—	—	7:09	—	—	7:11	—	—	7:13	—	—
	6:45	—	—	6:43	—	—	6:40	—	—	6:38	—	—	6:37	—	—	6:35	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Warm (max 22°C on Sun afternoon, min 13°C on Fri night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Very mild (max 19°C on Mon afternoon, min 12°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
Fall City 19 km W 115m alt. 2 hours ago	14°C	Dry	Calm (0 kph at 355).
Maple Valley 22 km SW 233m alt. 2 hours ago	14°C	Dry	Calm (0 kph at 209).
Sammamish 24 km W 138m alt. 3 hours ago	16°C	Dry	Calm (0 kph at 0).
Orchard Grove wx 26 km SW 115m alt. 3 hours ago	16°C	-	Calm (0 kph at 0).
Black Diamond 32 km SSW 192m alt. 2 hours ago		-	Wind obs. (11 kph from 360 degs) was rejected.
Bellevue 32 km W 128m alt. 2 hours ago	17°C	-	Calm (0 kph at 292).
Pines wx 34 km WSW 77m alt. 2 hours ago	17°C	-	Calm (0 kph at 195).
Benson Hill wx 35 km SW 144m alt. 2 hours ago	17°C	Dry	Calm (0 kph at 341).
Renton Airport 36 km WSW 218m alt. 3 hours ago	18°C	Dry and partly cloudy.	Light winds from the NNW (7 kph at 330).	16 km Low: scattered
Auburn 39 km SW 119m alt. 2 hours ago	15°C	Dry	Calm (0 kph at 204).

* 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.