– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 pm Thu 23 Apr Local Time
Updates in:
hr min s
Update imminent

Issued: 10 pm Thu 23 Apr Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Mostly dry. Mild temperatures (max 8°C on Sun afternoon, min 1°C on Thu night). Wind will be generally light.										Days 5–7 Weather Summary A dusting of new snow. Freeze-thaw conditions (max 11°C on Wed afternoon, min -2°C on Mon night). Winds decreasing (fresh winds from the SW on Mon night, calm by Tue morning).
		Friday 24			Saturday 25			Sunday 26			Monday 27			Tuesday 28			Wednesday 29
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	some clouds	clear	some clouds	clear	clear	some clouds	rain shwrs	clear	clear	clear	cloudy	cloudy	light snow	some clouds	some clouds	clear	clear	clear	clear
km/h	NE	NE	NNW	NNE	NNW	NNW	N	NNW	NW	SSW	SW	SW	SW	W	NNW	N	E	NNE	SE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	1	—	—	—	—	—	—
mm	—	—	—	—	—	—	0.2	—	—	—	—	—	—	—	—	—	—	—	—
max °C	3	4	6	5	5	6	5	6	8	7	1	1	1	-1	2	2	7	11	11
min °C	1	3	5	4	5	6	5	5	7	3	1	1	-2	-2	1	2	4	9	9
chill °C	-1	-1	2	3	5	4	5	3	4	-1	-4	-5	-7	-6	1	0	3	9	8

Freezing level m	1550	1800	1900	1900	1900	2000	1950	1900	2150	1950	1400	1450	1050	1150	1500	1800	2500	2750	2850
Cloud base (m)	900		6700			2400	5200	3200	2400	2550	550	450	450	500	750	950

	—	6:01	—	—	6:00	—	—	5:58	—	—	5:56	—	—	5:54	—	—	5:52	—	—
	—	—	—	8:07	—	—	8:09	—	—	8:10	—	—	8:12	—	—	8:14	—	—	8:15

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Mild temperatures (max 8°C on Sun afternoon, min 1°C on Thu night). Wind will be generally light.

Mount Si Weather (Days 3-6):

A dusting of new snow. Freeze-thaw conditions (max 11°C on Wed afternoon, min -2°C on Mon night). Winds decreasing (fresh winds from the SW on Mon night, calm by Tue morning).

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	7° C	Dry	Calm (0 kph at 18).
Snoqualmie Pass 30 km ESE 824m alt. 1 hour ago	1° C	-	Calm (0 kph at 295).
Renton 30 km WSW 160m alt. 37 minutes ago	7° C	Dry	Calm (2 kph at 77).
Black Diamond 32 km SSW 192m alt. 57 minutes ago		-	Calm (0 kph at 0).
Grotto wx 35 km NE 321m alt. 41 minutes ago	6° C	Dry	Calm (0 kph at 74).
Renton Airport 36 km WSW 218m alt. 3 hours ago	9° C	Dry and partly cloudy.	Calm (0 kph at 0).	16 km Low: scattered Mid: broken
Grotto wx 39 km NE 1101m alt. 1 hour ago	0° C	-	Calm (0 kph at 19).
Auburn 39 km SW 119m alt. 1 hour ago	6° C	Dry	Calm (0 kph at 78).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	1° C	Mist -.	Wind obs. (6 kph from 210 degs) was rejected.	1 km
Woodinville 43 km WNW 137.2m alt. 38 minutes ago	4° C	Dry	Calm (0 kph at 347).

* 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.