– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 am Wed 02 Sep Local Time
Updates in:
hr min s
Update imminent

Issued: 4 am Wed 02 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 14mm), heaviest on Wed night. Mild temperatures (max 9°C on Wed afternoon, min 5°C on Wed night). Winds decreasing (fresh winds from the WSW on Wed night, calm by Fri morning).									Days 4–6 Weather Summary Mostly dry. Very mild (max 13°C on Sun afternoon, min 8°C on Sat morning). Wind will be generally light.
	Wednesday 2			Thursday 3			Friday 4			Saturday 5			Sunday 6			Monday 7
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	rain shwrs	light rain	rain shwrs	some clouds	rain shwrs	rain shwrs	cloudy	rain shwrs	light rain	cloudy	light rain	cloudy	some clouds	some clouds	clear	clear	clear	some clouds
Cloud base (m)	2050	1450	400	800	1600	2200	800	1500		2450	2350	2850	2750	2250		7150
km/h	SSW	SSW	SW	SSW	NW	N	SE	WNW	N	SSW	NW	ESE	ESE	N	NNW	NW	NW	NNW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	1	3	6	—	1.9	0.9	—	0.4	0.4	—	0.1	—	—	—	—	—	—	—
max °C	8	9	7	6	7	6	6	8	8	8	11	10	11	13	12	11	13	12
min °C	8	8	5	5	7	6	6	7	7	8	10	10	10	12	10	10	13	10
chill °C	5	4	0	3	6	5	5	7	7	8	10	10	9	12	8	9	12	9

Freezing level m	2500	2550	2100	2150	2300	2300	2200	2450	2550	2500	2650	2650	2650	2850	3050	3050	3300	3600

	6:26	—	—	6:26	—	—	6:28	—	—	6:30	—	—	6:31	—	—	6:33	—	—
	—	7:45	—	—	7:44	—	—	7:42	—	—	7:39	—	—	7:37	—	—	7:36	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Moderate rain (total 14mm), heaviest on Wed night. Mild temperatures (max 9°C on Wed afternoon, min 5°C on Wed night). Winds decreasing (fresh winds from the WSW on Wed night, calm by Fri morning).

Mount Si Weather (Days 3-6):

Mostly dry. Very mild (max 13°C on Sun afternoon, min 8°C on Sat morning). 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 30 km WSW 160m alt. 35 minutes ago	15°C	Dry	Calm (0 kph at 70).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Calm (2 kph at 128).
Renton Airport 36 km WSW 218m alt. 2 hours ago	14°C	Clear	Calm (0 kph at 0).	16 km
Auburn 39 km SW 119m alt. 2 hours ago	20°C	Dry	Calm (0 kph at 252).
Monroe 44 km NW 80m alt. 48 minutes ago		-	Calm (0 kph at 236).
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	15°C	Dry and partly cloudy.	Light winds from the S (9 kph at 170).	16 km Low: scattered Mid: broken
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	15°C	Dry and partly cloudy.	Light winds from the SSE (9 kph at 150).	16 km Low: few Mid: broken High: broken
BUOY-EBSW1 46 km W 3m alt. 1 hour ago
Snohomish 49 km NW 196m alt. 2 hours ago	16°C	Dry	Light winds from the SSW (14 kph at 193).
Seattle 49 km WSW 100m alt. 2 hours 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.