– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 am Fri 15 May Local Time
Updates in:
hr min s
Update imminent

Issued: 4 am Fri 15 May Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary A moderate fall of snow, heaviest on Fri afternoon. Freeze-thaw conditions (max 3°C on Sun afternoon, min -1°C on Fri morning). Winds decreasing (fresh winds from the WSW on Fri night, calm by Sun afternoon).									Days 4–6 Weather Summary Light rain (total 8mm), mostly falling on Wed night. Mild temperatures (max 7°C on Wed afternoon, min 2°C on Mon night). Winds increasing (light winds from the WNW on Mon morning, fresh winds from the WSW by Wed night).
	Friday 15			Saturday 16			Sunday 17			Monday 18			Tuesday 19			Wednesday 20
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light snow	light snow	light snow	snow shwrs	snow shwrs	some clouds	cloudy	some clouds	cloudy	rain shwrs	rain shwrs	light rain	rain shwrs	rain shwrs	rain shwrs	some clouds	some clouds	rain shwrs
km/h	SW	SW	WSW	WNW	NNW	N	NNW	NW	NW	WNW	WNW	NNW	NW	NW	NW	NW	WSW	SW
See all weather maps
cm	1	4	5	4	2	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	0.1	0.2	2	0.5	1.5	0.6	—	—	3
max °C	-1	0	0	-1	1	0	0	3	3	3	6	5	4	5	5	5	7	7
min °C	-1	0	-1	-1	0	-1	0	2	2	3	5	2	3	5	3	4	7	6
chill °C	-8	-6	-8	-5	-3	-7	-4	2	0	1	4	-2	0	3	1	2	6	2

Freezing level m	1200	1250	1200	1200	1350	1200	1300	1750	1850	1700	2100	1800	1950	2150	2400	2400	2750	2650
Cloud base (m)	600	400	400	450	650	500	450	750	1700	950	1800	500	500	900	600	600	2050	600

	5:30	—	—	5:28	—	—	5:26	—	—	5:26	—	—	5:24	—	—	5:24	—	—
	—	—	8:37	—	—	8:37	—	—	8:38	—	—	8:39	—	—	8:42	—	—	8:43

Mount Si Weather (Days 0-3):

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

Mount Si Weather (Days 3-6):

Light rain (total 8mm), mostly falling on Wed night. Mild temperatures (max 7°C on Wed afternoon, min 2°C on Mon night). Winds increasing (light winds from the WNW on Mon morning, fresh winds from the WSW by Wed night).

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. 50 minutes ago	9° C	Dry	Calm (0 kph at 320).
Snoqualmie Pass 30 km ESE 824m alt. 1 hour ago	4° C	-	Calm (0 kph at 203).
Renton 30 km WSW 160m alt. 1 hour ago	9° C	Dry	Light winds from the SSE (8 kph at 159).
Black Diamond 32 km SSW 192m alt. 48 minutes ago		-	Calm (2 kph at 0).
Grotto wx 35 km NE 321m alt. 51 minutes ago	7° C	Dry	Calm (2 kph at 162).
Renton Airport 36 km WSW 218m alt. 2 hours ago	9° C	-	Light winds from the S (9 kph at 180).	16 km Low: few
Grotto wx 39 km NE 1101m alt. 3 hours ago	1° C	-	Calm (2 kph at 222).
Auburn 39 km SW 119m alt. 2 hours ago	13° C	Dry	Calm (0 kph at 162).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	0° C	Mist -.	Light winds from the N (11 kph at 1).	6 km Low: broken Mid: overcast
Woodinville 43 km WNW 137.2m alt. 1 hour ago	7° C	Dry	Wind obs. (8 kph from 289 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.