– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 am Fri 26 Apr Local Time
Updates in:
hr min s
Update imminent

Issued: 10 am Fri 26 Apr Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Mild at first with light rain (total 4mm) on Fri night followed by colder weather and light fall of snow, heaviest on Sat morning. Freeze-thaw conditions (max 4°C on Fri afternoon, min -4°C on Sun night). Winds increasing (light winds from the WSW on Fri afternoon, strong winds from the SW by Sat night).									Days 4–6 Weather Summary A moderate fall of snow, heaviest on Mon afternoon. Freeze-thaw conditions (max 6°C on Wed night, min -4°C on Mon morning). Wind will be generally light.
	Friday 26			Saturday 27			Sunday 28			Monday 29			Tuesday 30			Wednesday 1
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	some clouds	rain shwrs	light rain	light snow	light snow	light snow	light snow	light snow	mod. snow	snow shwrs	light snow	snow shwrs	some clouds	some clouds	some clouds	clear	some clouds	some clouds
km/h	SW	W	SW	SW	SW	WSW	SW	WSW	WSW	W	WSW	SW	WNW	NW	NNW	NW	NW	E
Wave Height Map See all maps
cm	—	—	—	3	2.0	1.0	1.0	3	6	2.0	4	4	—	—	—	—	—	—
mm	—	1.0	3	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
max°C	2	4	3	1	1	1	-1	0	-1	-3	-2	-2	-2	-1	-1	2	5	6
min°C	1	3	2	0	0	0	-1	0	-4	-4	-2	-4	-3	-2	-2	0	4	5
chill°C	-2	1	-2	-6	-5	-6	-8	-6	-11	-8	-7	-9	-7	-5	-5	-2	4	5

Freezing level (m)	1550	1850	1650	1300	1400	1300	1150	1250	750	850	1000	700	950	1150	1000	1450	2050	2450
Cloud base (m)	450	700	400	400	400	400	400	450	400	450	550	600	450	650	700	750	1650	4550

	5:56	—	—	5:54	—	—	5:52	—	—	5:52	—	—	5:50	—	—	5:48	—	—
	—	—	8:12	—	—	8:14	—	—	8:15	—	—	8:16	—	—	8:17	—	—	8:19

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mild at first with light rain (total 4mm) on Fri night followed by colder weather and light fall of snow, heaviest on Sat morning. Freeze-thaw conditions (max 4°C on Fri afternoon, min -4°C on Sun night). Winds increasing (light winds from the WSW on Fri afternoon, strong winds from the SW by Sat night).

Mount Si Weather (Days 3-6):

A moderate fall of snow, heaviest on Mon afternoon. Freeze-thaw conditions (max 6°C on Wed night, min -4°C on Mon morning). 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 5 closest weather stations

Weather Station	Temp.	Weather	Wind	Cloud Visibility Cloud / Visibility
Snoqualmie Pass 30 km ESE 824m alt. 29 minutes ago	12° C	-	Calm (2 kph at 158).
Renton Airport 36 km WSW 218m alt. 2 hours ago	12° C	Dry and cloudy.	Light winds from the SSE (7 kph at 160).	16 km Low: scattered Mid: overcast
Grotto wx 39 km NE 1101m alt. 2 hours ago	6° C	Dry	Calm (0 kph at 61).
Stampede Pass Airport 40 km SE 628m alt. 1 hour ago	5° C	Mist -.	Calm (0 kph at 0).	10 km Low: scattered Mid: broken
Woodinville 43 km WNW 137.2m alt. 1 hour ago	11° C	Dry	Calm (0 kph at 288).

* 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.