– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 pm Thu 23 Apr Local Time
Updates in:
hr min s
Update imminent

Issued: 4 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 7°C on Sat afternoon, min 1°C on Thu afternoon). Wind will be generally light.											Days 5–7 Weather Summary Some drizzle, heaviest during Sun night. Freeze-thaw conditions (max 9°C on Wed morning, min 0°C on Mon night). Wind will be generally light.
	Thu 23		Friday 24			Saturday 25			Sunday 26			Monday 27			Tuesday 28
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	some clouds	clear	clear	some clouds	some clouds	clear	clear	rain shwrs	rain shwrs	clear	rain shwrs	cloudy	cloudy	cloudy	cloudy	rain shwrs	rain shwrs
km/h	NNW	NNE	NE	NNW	N	NW	NW	NNW	WNW	WNW	SW	SW	SW	SSW	SW	NNW	ENE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	0.1	0.1	—	1.1	—	—	—	—	0.1	0.1
max °C	2	2	4	6	5	5	7	6	5	8	6	1	2	1	0	2	6
min °C	1	1	3	5	4	5	6	5	5	7	3	1	1	0	0	1	2
chill °C	-2	-1	-1	2	3	5	4	5	4	5	-1	-4	-4	-4	-4	1	2

Freezing level m	1450	1650	1750	1950	1900	1900	2100	2000	1900	2100	1950	1450	1500	1250	1300	1500	2200
Cloud base (m)	550	900			6700			6850		2300	2400	500	500	500	500	550

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

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Mild temperatures (max 7°C on Sat afternoon, min 1°C on Thu afternoon). Wind will be generally light.

Mount Si Weather (Days 3-6):

Some drizzle, heaviest during Sun night. Freeze-thaw conditions (max 9°C on Wed morning, min 0°C on Mon 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. 46 minutes ago	14° C	Dry	Calm (0 kph at 316).
Snoqualmie Pass 30 km ESE 824m alt. 1 hour ago	7° C	-	Calm (0 kph at 165).
Renton 30 km WSW 160m alt. 1 hour ago	14° C	Dry	Calm (2 kph at 306).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Wind obs. (8 kph from 241 degs) was rejected.
Grotto wx 35 km NE 321m alt. 1 hour ago	9° C	Dry	Calm (5 kph at 261).
Renton Airport 36 km WSW 218m alt. 3 hours ago	14° C	Dry and cloudy.	Light winds from the N (9 kph at 350).	16 km Low: overcast
Grotto wx 39 km NE 1101m alt. 38 minutes ago	3° C	Dry	Calm (0 kph at 64).
Auburn 39 km SW 119m alt. 42 minutes ago	19° C	Dry	Calm (0 kph at 254).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	2° C	Dry and cloudy.	Wind obs. (7 kph from 230 degs) was rejected.	16 km Low: few Mid: broken High: overcast
Woodinville 43 km WNW 137.2m alt. 1 hour ago	9° C	Dry	Wind obs. (14 kph from 309 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.