– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 am Mon 31 Aug Local Time
Updates in:
hr min s
Update imminent

Issued: 4 am Mon 31 Aug Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Moderate rain (total 18mm), heaviest on Wed afternoon. Very mild (max 18°C on Mon afternoon, min 4°C on Wed night). Winds increasing (calm on Mon night, fresh winds from the SW by Wed night).									Days 4–6 Weather Summary Moderate rain (total 14mm), heaviest on Thu afternoon. Mild temperatures (max 9°C on Fri afternoon, min 4°C on Thu morning). Winds decreasing (fresh winds from the SW on Thu morning, calm by Sat morning).
	Monday 31			Tuesday 1			Wednesday 2			Thursday 3			Friday 4			Saturday 5
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	some clouds	some clouds	some clouds	rain shwrs	light rain	light rain	mod. rain	mod. rain	light rain	mod. rain	light rain	rain shwrs	light rain	some clouds	cloudy	light rain	rain shwrs
Cloud base (m)	9400	5850	5150	5050	1650	1900	1900	500	700	450	450	850	850	1700	6850	2300	800	2250
km/h	ESE	E	SSW	SW	WSW	SW	SSW	S	SW	SW	SSW	SW	NW	N	N	SE	N	ESE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	0.1	0.6	1.1	6	10	4	7	0.2	0.2	0.2	—	—	2	0.5
max °C	15	18	17	13	12	9	9	8	6	5	5	5	6	9	8	8	8	8
min °C	14	17	13	12	12	8	8	8	4	4	4	5	5	8	8	8	8	8
chill °C	14	17	13	11	11	5	5	6	-1	-1	-1	1	3	8	8	8	8	8

Freezing level m	3800	3850	3800	3600	3300	2850	2600	2600	1950	2000	2050	2200	2350	2600	2600	2400	2450	2650

	6:22	—	—	6:24	—	—	6:26	—	—	6:26	—	—	6:28	—	—	6:30	—	—
	—	7:49	—	—	7:46	—	—	7:45	—	—	7:44	—	—	7:42	—	—	7:39	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Moderate rain (total 18mm), heaviest on Wed afternoon. Very mild (max 18°C on Mon afternoon, min 4°C on Wed night). Winds increasing (calm on Mon night, fresh winds from the SW by Wed night).

Mount Si Weather (Days 3-6):

Moderate rain (total 14mm), heaviest on Thu afternoon. Mild temperatures (max 9°C on Fri afternoon, min 4°C on Thu morning). Winds decreasing (fresh winds from the SW on Thu morning, calm by Sat morning).

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. 53 minutes ago	12°C	Dry	Calm (0 kph at 46).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Calm (0 kph at 0).
Renton Airport 36 km WSW 218m alt. 3 hours ago	14°C	Clear	Light winds from the N (9 kph at 350).	16 km
Auburn 39 km SW 119m alt. 50 minutes ago		-	Calm (0 kph at 49).
Monroe 44 km NW 80m alt. 45 minutes ago		-	Calm (0 kph at 198).
Seattl / oeing Airport 44 km WSW 218m alt. 3 hours ago	14°C	Clear	Light winds from the N (6 kph at 1).	16 km
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	13°C	Dry and partly cloudy.	Light winds from the N (9 kph at 0).	16 km Low: few Mid: scattered
BUOY-EBSW1 46 km W 3m alt. 1 hour ago
Snohomish 49 km NW 196m alt. 51 minutes ago	11°C	Dry	Calm (0 kph at 317).
Seattle 49 km WSW 100m alt. 1 hour ago		-	Calm (2 kph at 103).

* 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.