– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 am Sat 16 May Local Time
Updates in:
hr min s
Update imminent

Issued: 4 am Sat 16 May Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary A dusting of new snow. Freeze-thaw conditions (max 8°C on Mon afternoon, min -1°C on Sat morning). Wind will be generally light.									Days 4–6 Weather Summary Light rain (total 8mm), mostly falling on Thu night. Very mild (max 10°C on Thu afternoon, min 3°C on Tue night). Wind will be generally light.
	Saturday 16			Sunday 17			Monday 18			Tuesday 19			Wednesday 20			Thursday 21
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	snow shwrs	snow shwrs	snow shwrs	some clouds	rain shwrs	some clouds	cloudy	rain shwrs	light rain	rain shwrs	rain shwrs	rain shwrs	clear	some clouds	some clouds	clear	some clouds	rain shwrs
km/h	WSW	NNW	NNW	N	WNW	NW	WNW	NW	W	WNW	WNW	N	N	NW	NNW	N	WNW	NNW
See all weather maps
cm	1	2	1	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	0.1	—	—	0.1	0.4	1.5	2	1.1	—	—	—	—	—	3
max °C	-1	1	0	1	5	5	4	8	6	4	6	5	5	9	8	8	10	8
min °C	-1	0	-1	0	3	4	4	7	3	4	5	3	4	8	7	8	10	4
chill °C	-7	-3	-7	-4	3	2	3	5	0	4	3	0	2	8	4	6	9	1

Freezing level m	1200	1400	1150	1400	2050	2100	1900	2200	1950	2000	2100	2550	2950	3300	3350	3200	3000	2250
Cloud base (m)	450	750	750	600	800		850	950	700	450	800	1600			2200	2800	1900	450

	5:28	—	—	5:26	—	—	5:26	—	—	5:24	—	—	5:24	—	—	5:22	—	—
	—	—	8:37	—	—	8:38	—	—	8:39	—	—	8:42	—	—	8:43	—	—	8:44

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A dusting of new snow. Freeze-thaw conditions (max 8°C on Mon afternoon, min -1°C on Sat morning). Wind will be generally light.

Mount Si Weather (Days 3-6):

Light rain (total 8mm), mostly falling on Thu night. Very mild (max 10°C on Thu afternoon, min 3°C on Tue night). 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
Harman Heights wx 6 km SSW 251m alt. 1 hour ago	6° C	Dry	Calm (0 kph at 349).
Snoqualmie Pass 30 km ESE 824m alt. 1 hour ago	3° C	-	Calm (0 kph at 72).
Renton 30 km WSW 160m alt. 52 minutes ago	6° C	Dry	Calm (2 kph at 146).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Calm (0 kph at 0).
Grotto wx 35 km NE 321m alt. 51 minutes ago	5° C	Dry	Calm (2 kph at 223).
Renton Airport 36 km WSW 218m alt. 2 hours ago	8° C	-	Light winds from the S (15 kph at 180).	16 km Low: few Mid: few
Grotto wx 39 km NE 1101m alt. 51 minutes ago	0° C	-	Calm (2 kph at 230).
Auburn 39 km SW 119m alt. 49 minutes ago	12° C	Dry	Calm (0 kph at 248).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	-1° C	Fog freezing -.	Light winds from the N (6 kph at 1).	0 km
Woodinville 43 km WNW 137.2m alt. 1 hour ago	2° C	-	Calm (0 kph at 352).

* 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.