– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 10 am Fri 25 Sep Local Time

Updates in:

hr min s

Update imminent

Issued: 10 am Fri 25 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 Fri afternoon. Very mild (max 14°C on Sun afternoon, min 7°C on Fri night). Winds decreasing (fresh winds from the SW on Fri afternoon, calm by Sun night).									Days 4–6 Weather Summary Moderate rain (total 11mm), heaviest on Tue afternoon. Very mild (max 15°C on Mon afternoon, min 7°C on Wed night). Wind will be generally light.
	Friday 25			Saturday 26			Sunday 27			Monday 28			Tuesday 29			Wednesday 30
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	rain shwrs	heavy rain	rain shwrs	rain shwrs	some clouds	some clouds	some clouds	clear	clear	clear	clear	some clouds	some clouds	mod. rain	rain shwrs	rain shwrs	some clouds	some clouds
Cloud base (m)	2150	650	750			6400	5850			6250		5750	2100	600	450	600	1700	1650
km/h	SSW	WSW	SSW	NW	NW	E	NW	NW	ENE	NW	WNW	S	SSW	SW	W	NW	NNW	W
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	4	13	3	0.1	—	—	—	—	—	—	—	—	—	8	3	0.3	—	—
max °C	13	9	8	10	13	9	13	14	10	13	15	11	14	12	11	10	13	9
min °C	12	9	7	8	13	8	8	14	8	8	15	10	12	11	8	8	12	7
chill °C	11	5	5	8	13	8	8	14	8	8	15	9	11	9	8	8	11	7

Freezing level m	2200	2000	1600	1900	2400	2600	2600	2650	2850	3000	3100	3400	2900	3000	1950	1850	2100	1950

	6:56	—	—	6:58	—	—	6:58	—	—	7:01	—	—	7:01	—	—	7:03	—	—
	—	6:59	—	—	6:57	—	—	6:54	—	—	6:52	—	—	6:51	—	—	6:49	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Moderate rain (total 19mm), heaviest on Fri afternoon. Very mild (max 14°C on Sun afternoon, min 7°C on Fri night). Winds decreasing (fresh winds from the SW on Fri afternoon, calm by Sun night).

Mount Si Weather (Days 3-6):

Moderate rain (total 11mm), heaviest on Tue afternoon. Very mild (max 15°C on Mon afternoon, min 7°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	12°C	Light rain.	Light winds from the S (8 kph at 181).
Renton Airport 36 km WSW 218m alt. 2 hours ago	13°C	Light rain .	Light winds from the S (19 kph at 190).	14 km Low: few Mid: overcast
Auburn 39 km SW 119m alt. 56 minutes ago	19°C	Dry	Calm (5 kph at 304).
Monroe 44 km NW 80m alt. 1 hour ago	9°C	Dry	Calm (0 kph at 15).
Seattl / oeing Airport 44 km WSW 218m alt. 3 hours ago	13°C	Heavy rain .	Light winds from the N (6 kph at 1).	2 km Mid: scattered High: overcast
Seattle Tacoma International Airport 44 km WSW 218m alt. 3 hours ago	12°C	Light rain .	Fresh winds from the SSW (30 kph at 210).	11 km Low: scattered Mid: broken High: broken
BUOY-EBSW1 46 km W 3m alt. 1 hour ago
Snohomish 49 km NW 196m alt. 3 hours ago	12°C	Dry	Wind obs. (8 kph from 262 degs) was rejected.
Seattle 49 km WSW 100m alt. 44 minutes ago		-	Calm (2 kph at 39).
BUOY-WPOW1 55 km W 3m alt. 1 hour ago	11°C		Moderate winds from the NE (22 kph at 40).

* 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.