– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 pm Thu 14 May Local Time
Updates in:
hr min s
Update imminent

Issued: 4 pm Thu 14 May Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary A moderate fall of snow, heaviest on Thu afternoon. Freeze-thaw conditions (max 3°C on Thu afternoon, min -1°C on Thu night). Winds decreasing (strong winds from the SW on Thu night, light winds from the N by Sun morning).											Days 5–7 Weather Summary Light rain (total 5mm), mostly falling on Tue morning. Mild temperatures (max 7°C on Mon afternoon, min 2°C on Sun afternoon). Wind will be generally light.
	Thu 14		Friday 15			Saturday 16			Sunday 17			Monday 18			Tuesday 19
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light snow	snow shwrs	light snow	light snow	light snow	snow shwrs	snow shwrs	some clouds	some clouds	rain shwrs	some clouds	some clouds	rain shwrs	light rain	light rain	rain shwrs	rain shwrs
km/h	SW	SW	SW	SW	SW	NW	NNW	N	N	NW	NW	WNW	WNW	W	WSW	W	NNW
See all weather maps
cm	3	3	1	4	3	2	2	—	—	—	—	—	—	—	—	—	—
mm	0.8	—	—	—	—	—	—	—	—	0.1	—	—	0.1	0.3	2	1.6	0.6
max °C	3	1	-1	0	0	-1	1	1	0	3	3	4	7	6	3	4	4
min °C	1	-1	-1	0	-1	-1	0	-1	-1	2	2	3	6	3	3	3	3
chill °C	-5	-8	-8	-6	-8	-7	-4	-6	-5	0	-1	1	4	0	-1	0	1

Freezing level m	1450	1200	1150	1250	1200	1100	1400	1200	1250	1650	1750	1750	2150	1800	1800	1850	2250
Cloud base (m)	700	600	550	400	400	450	650	800	550	900	1500	1000	2150	750	450	450	550

	—	—	5:30	—	—	5:28	—	—	5:26	—	—	5:26	—	—	5:24	—	—
	—	8:35	—	—	8:37	—	—	8:37	—	—	8:38	—	—	8:39	—	—	8:42

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A moderate fall of snow, heaviest on Thu afternoon. Freeze-thaw conditions (max 3°C on Thu afternoon, min -1°C on Thu night). Winds decreasing (strong winds from the SW on Thu night, light winds from the N by Sun morning).

Mount Si Weather (Days 3-6):

Light rain (total 5mm), mostly falling on Tue morning. Mild temperatures (max 7°C on Mon afternoon, min 2°C on Sun afternoon). 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	12° C	Dry	Calm (0 kph at 332).
Snoqualmie Pass 30 km ESE 824m alt. 1 hour ago	7° C	-	Calm (0 kph at 188).
Renton 30 km WSW 160m alt. 55 minutes ago	12° C	Dry	Calm (5 kph at 217).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Wind obs. (10 kph from 360 degs) was rejected.
Grotto wx 35 km NE 321m alt. 53 minutes ago	9° C	Dry	Calm (2 kph at 267).
Renton Airport 36 km WSW 218m alt. 3 hours ago	14° C	Dry and cloudy.	Moderate winds from the S (24 kph at 190).	16 km Low: scattered Mid: overcast
Grotto wx 39 km NE 1101m alt. 57 minutes ago	3° C	Dry	Calm (2 kph at 113).
Auburn 39 km SW 119m alt. 1 hour ago		-	Calm (0 kph at 144).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	3° C	Light rain .	Light winds from the N.(Wind varies from 004 to 010 degs) (9 kph at 1).	10 km Mid: broken High: overcast
Woodinville 43 km WNW 137.2m alt. 2 hours ago	9° C	Dry	Wind obs. (13 kph from 290 degs) was rejected.

* 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.