– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 10 pm Sun 13 Sep Local Time

Updates in:

hr min s

Update imminent

Issued: 10 pm Sun 13 Sep Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Light rain (total 4mm), mostly falling on Sun night. Warm (max 21°C on Wed afternoon, min 10°C on Mon night). Wind will be generally light.										Days 5–7 Weather Summary Mostly dry. Warm (max 22°C on Thu afternoon, min 11°C on Fri night). Wind will be generally light.
		Monday 14			Tuesday 15			Wednesday 16			Thursday 17			Friday 18
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light rain	rain shwrs	rain shwrs	some clouds	light rain	light rain	clear	clear	clear	clear	clear	clear	clear	clear	clear	some clouds
Cloud base (m)	600	700	950	5700	950	1500	2550			6950
km/h	SW	WSW	NW	ESE	N	NNE	E	NNW	NNW	E	WNW	WNW	SSE	W	W	NE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	3	0.5	0.1	—	0.3	0.2	—	—	—	—	—	—	—	—	—	—
max °C	11	11	15	12	11	14	13	18	21	16	20	22	17	16	18	14
min °C	11	11	14	10	11	13	11	13	20	14	16	22	12	12	18	11
chill °C	10	11	14	10	11	13	10	13	20	14	16	22	12	12	18	11

Freezing level m	2750	3400	3350	3200	2500	2600	2900	3550	3700	3800	3750	3700	3800	3850	3850	3900

	—	6:41	—	—	6:43	—	—	6:45	—	—	6:46	—	—	6:47	—	—
	—	—	7:21	—	—	7:19	—	—	7:16	—	—	7:15	—	—	7:13	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Light rain (total 4mm), mostly falling on Sun night. Warm (max 21°C on Wed afternoon, min 10°C on Mon night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Warm (max 22°C on Thu afternoon, min 11°C on Fri 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. 1 hour ago	14°C	Dry	Calm (2 kph at 142).
Black Diamond 32 km SSW 192m alt. 57 minutes ago		-	Calm (0 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	16°C	Dry and cloudy.	Light winds from the SSE (9 kph at 160).	16 km Low: overcast
Auburn 39 km SW 119m alt. 1 hour ago		-	Calm (0 kph at 184).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	6°C	Light rain .	Light winds from the W (9 kph at 260).	11 km Low: broken Mid: overcast
Monroe 44 km NW 80m alt. 1 hour ago	11°C	Dry	Calm (0 kph at 280).
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	15°C	Dry and partly cloudy.	Light winds from the SSE (19 kph at 160).	16 km Low: few Mid: scattered
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	14°C	Dry and partly cloudy.	Moderate winds from the S (20 kph at 170).	16 km Low: scattered
BUOY-EBSW1 46 km W 3m alt. 1 hour ago
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.