– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 pm Thu 21 May Local Time
Updates in:
hr min s
Update imminent

Issued: 4 pm Thu 21 May Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Mostly dry. Warm (max 20°C on Thu afternoon, min 6°C on Sat night). Wind will be generally light.											Days 5–7 Weather Summary Moderate rain (total 17mm), heaviest on Mon night. Very mild (max 17°C on Sun afternoon, min 6°C on Wed morning). Wind will be generally light.
	Thu 21		Friday 22			Saturday 23			Sunday 24			Monday 25			Tuesday 26
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	some clouds	clear	clear	clear	some clouds	some clouds	clear	some clouds	clear	some clouds	some clouds	cloudy	light rain	mod. rain	light rain	light rain	light rain
km/h	WNW	E	WNW	WNW	WSW	W	WSW	WSW	WSW	WSW	S	W	SW	WSW	WNW	NW	SW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	1.3	6	5	3	0.8
max °C	20	17	16	20	17	15	18	14	14	17	15	13	13	8	7	8	8
min °C	20	11	13	19	11	13	18	6	10	16	11	11	9	7	7	7	7
chill °C	20	11	13	19	11	13	18	5	10	16	11	11	7	6	6	6	5

Freezing level m	3050	2950	2900	3200	3350	3300	3250	3200	3050	3100	2950	2150	1900	1650	1600	1700	1850
Cloud base (m)		8500	2550		6750	550	1500	8600	4650	4900	4600	2450	1450	400	400	400	450

	—	—	5:22	—	—	5:20	—	—	5:20	—	—	5:18	—	—	5:18	—	—
	—	8:44	—	—	8:45	—	—	8:45	—	—	8:46	—	—	8:49	—	—	8:50

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Warm (max 20°C on Thu afternoon, min 6°C on Sat night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Moderate rain (total 17mm), heaviest on Mon night. Very mild (max 17°C on Sun afternoon, min 6°C on Wed morning). 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. 2 hours ago	19° C	Dry	Calm (0 kph at 324).
Snoqualmie Pass 30 km ESE 824m alt. 49 minutes ago	16° C	-	Calm (0 kph at 123).
Renton 30 km WSW 160m alt. 1 hour ago	22° C	Dry	Calm (3 kph at 335).
Black Diamond 32 km SSW 192m alt. 2 hours ago		-	Wind obs. (10 kph from 225 degs) was rejected.
Grotto wx 35 km NE 321m alt. 1 hour ago	22° C	Dry	Calm (5 kph at 246).
Renton Airport 36 km WSW 218m alt. 2 hours ago	23° C	Clear	Light winds from the N (13 kph at 350).	16 km
Grotto wx 39 km NE 1101m alt. 2 hours ago	13° C	Dry	Calm (2 kph at 318).
Auburn 39 km SW 119m alt. 1 hour ago	21° C	Dry	Calm (0 kph at 242).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	16° C	Clear	Light winds from the WNW (11 kph at 290).	16 km
Woodinville 43 km WNW 137.2m alt. 1 hour ago	22° C	Dry	Calm (2 kph at 270).

* 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.