– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 am Mon 04 May Local Time
Updates in:
hr min s
Update imminent

Issued: 4 am Mon 04 May Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Mostly dry. Warm (max 22°C on Mon afternoon, min 6°C on Wed night). Wind will be generally light.									Days 4–6 Weather Summary Light rain (total 2mm), mostly falling on Fri night. Very mild (max 15°C on Thu afternoon, min 7°C on Fri night). Wind will be generally light.
	Monday 4			Tuesday 5			Wednesday 6			Thursday 7			Friday 8			Saturday 9
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	clear	clear	clear	clear	clear	some clouds	some clouds	clear	some clouds	cloudy	cloudy	rain shwrs	light rain	rain shwrs	some clouds	clear
km/h	WNW	WNW	NE	WNW	WNW	SSW	WSW	WSW	WSW	WNW	W	SW	SW	WSW	W	WNW	NNW	ENE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	0.4	1.6	0.2	—	—
max °C	20	22	18	17	20	18	16	17	13	12	15	13	10	13	7	11	15	12
min °C	18	22	13	14	20	11	13	17	6	9	15	9	9	8	7	8	14	9
chill °C	18	22	13	14	20	11	13	17	6	9	15	8	7	6	6	8	14	9

Freezing level m	3450	3500	3550	3500	3500	3600	3450	3150	2950	3250	3300	3300	2000	1650	1850	2400	2950	3350
Cloud base (m)	9400	9050					9100		9400			6350	5300	1800	500	600	1800	8700

	5:45	—	—	5:43	—	—	5:41	—	—	5:41	—	—	5:39	—	—	5:37	—	—
	—	—	8:22	—	—	8:22	—	—	8:24	—	—	8:25	—	—	8:27	—	—	8:29

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Warm (max 22°C on Mon afternoon, min 6°C on Wed night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Light rain (total 2mm), mostly falling on Fri night. Very mild (max 15°C on Thu afternoon, min 7°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
Harman Heights wx 6 km SSW 251m alt. 56 minutes ago	9° C	Dry	Calm (0 kph at 324).
Renton 30 km WSW 160m alt. 2 hours ago	13° C	Dry	Calm (0 kph at 49).
Black Diamond 32 km SSW 192m alt. 3 hours ago		-	Calm (2 kph at 0).
Renton Airport 36 km WSW 218m alt. 2 hours ago	12° C	Clear	Light winds from the SSE (6 kph at 150).	16 km
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	12° C	Clear	Wind obs. (6 kph from 210 degs) was rejected.	16 km
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	13° C	Dry and partly cloudy.	Calm (0 kph at 0).	16 km Low: scattered
Seattle Tacoma International Airport 44 km WSW 218m alt. 2 hours ago	15° C	Dry and partly cloudy.	Light winds from the SE (9 kph at 130).	16 km Low: scattered
Snohomish 49 km NW 196m alt. 2 hours ago	8° C	Dry	Calm (0 kph at 290).
BUOY-WPOW1 55 km W 3m alt. 1 hour ago	12° C		Calm (4 kph at 20).
Lake Roesiger wx 56 km NW 239m alt. 3 hours ago	12° C	Dry	Calm (0 kph at 70).

* 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.