– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 4 pm Tue 29 Sep Local Time

Updates in:

hr min s

Update imminent

Issued: 4 pm Tue 29 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 11mm), heaviest on Tue afternoon. Very mild (max 10°C on Wed night, min 5°C on Tue night). Winds decreasing (strong winds from the WSW on Tue afternoon, calm by Wed afternoon).											Days 5–7 Weather Summary Mostly dry. Very mild (max 18°C on Sun afternoon, min 10°C on Fri afternoon). Wind will be generally light.
	Tue 29		Wednesday 30			Thursday 1			Friday 2			Saturday 3			Sunday 4
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	mod. rain	rain shwrs	rain shwrs	rain shwrs	some clouds	cloudy	cloudy	light rain	light rain	clear	clear	clear	clear	clear	clear	clear	clear
Cloud base (m)	400	400	850	4950	3050	2350	1800	950	500	600				9350		9300
km/h	WSW	SW	NNE	E	WSW	SSW	SW	WSW	WSW	N	E	ESE	ESE	ESE	ESE	SSW	WNW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	8	3	0.2	0.1	—	—	—	0.1	0.1	—	—	—	—	—	—	—	—
max °C	9	8	6	8	10	10	10	10	9	11	11	13	16	15	17	18	16
min °C	9	5	6	7	8	9	10	9	9	10	10	12	15	15	15	17	13
chill °C	4	3	6	7	8	8	8	7	7	10	10	11	15	15	15	17	13

Freezing level m	3150	2850	3050	3250	3250	3300	3400	3200	3500	3550	3750	4050	4100	4200	4250	4150	3950

	—	—	7:03	—	—	7:05	—	—	7:05	—	—	7:07	—	—	7:09	—	—
	6:51	—	—	6:49	—	—	6:46	—	—	6:45	—	—	6:43	—	—	6:40	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Moderate rain (total 11mm), heaviest on Tue afternoon. Very mild (max 10°C on Wed night, min 5°C on Tue night). Winds decreasing (strong winds from the WSW on Tue afternoon, calm by Wed afternoon).

Mount Si Weather (Days 3-6):

Mostly dry. Very mild (max 18°C on Sun afternoon, min 10°C on Fri afternoon). Wind will be generally light.

This table gives the weather forecast for Mount Si at the specific elevation of 1270 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	13°C	Dry and cloudy.	Calm (0 kph at 0).	16 km Low: overcast
Auburn 39 km SW 119m alt. 39 minutes ago	14°C	Light rain.	Calm (0 kph at 63).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	9°C	Light rain .	Wind obs. (9 kph from 1 degs) was rejected.	6 km Mid: scattered High: broken
Monroe 44 km NW 80m alt. 1 hour ago	17°C	Dry	Calm (0 kph at 124).
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	13°C	Dry and cloudy.	Light winds from the N (6 kph at 1).	16 km Low: overcast
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	13°C	Dry and cloudy.	Moderate winds from the ENE (20 kph at 60).	16 km Low: overcast
BUOY-EBSW1 46 km W 3m alt. 1 hour ago
Snohomish 49 km NW 196m alt. 2 hours ago	12°C	Dry	Calm (0 kph at 80).
Seattle 49 km WSW 100m alt. 1 hour ago		-
BUOY-WPOW1 55 km W 3m alt. 1 hour ago	13°C		Light winds from the NE (8 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.