– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 am Sun 17 May Local Time
Updates in:
hr min s
Update imminent

Issued: 4 am Sun 17 May Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Mostly dry. Freeze-thaw conditions (max 8°C on Mon afternoon, min 0°C on Sun morning). Wind will be generally light.									Days 4–6 Weather Summary Mostly dry. Very mild (max 10°C on Thu afternoon, min 2°C on Fri night). Wind will be generally light.
	Sunday 17			Monday 18			Tuesday 19			Wednesday 20			Thursday 21			Friday 22
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	some clouds	rain shwrs	some clouds	some clouds	clear	some clouds	light rain	light rain	rain shwrs	rain shwrs	some clouds	some clouds	clear	some clouds	rain shwrs	light rain	rain shwrs	some clouds
km/h	NNW	WNW	NW	NW	NW	NW	WNW	NW	NW	N	NW	N	NNW	NW	NNW	NNW	W	SW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	0.1	—	—	—	—	0.1	0.4	0.2	0.1	—	—	—	—	0.3	0.2	0.1	—
max °C	1	5	5	4	8	7	4	5	5	4	7	7	8	10	9	6	9	9
min °C	0	3	3	4	6	4	4	5	3	3	5	7	8	10	6	5	6	2
chill °C	-4	3	1	2	4	2	2	3	0	0	5	6	6	8	5	5	5	-2

Freezing level m	1400	2050	2050	1900	2300	2200	2050	2300	2400	2700	3250	3250	2950	2850	3300	3400	3250	3050
Cloud base (m)	550	850			1700	1950	600	800	1600	550	850		2400	1950	600	400	6850

	5:26	—	—	5:26	—	—	5:24	—	—	5:24	—	—	5:22	—	—	5:22	—	—
	—	—	8:38	—	—	8:39	—	—	8:42	—	—	8:43	—	—	8:44	—	—	8:45

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Freeze-thaw conditions (max 8°C on Mon afternoon, min 0°C on Sun morning). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Very mild (max 10°C on Thu afternoon, min 2°C on Fri 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. 44 minutes ago	15° C	Dry	Calm (0 kph at 314).
Snoqualmie Pass 30 km ESE 824m alt. 1 hour ago	8° C	-	Calm (0 kph at 267).
Renton 30 km WSW 160m alt. 49 minutes ago	8° C	Dry	Calm (2 kph at 210).
Black Diamond 32 km SSW 192m alt. 36 minutes ago		-	Calm (3 kph at 215).
Grotto wx 35 km NE 321m alt. 1 hour ago	8° C	Dry	Calm (5 kph at 239).
Renton Airport 36 km WSW 218m alt. 2 hours ago	8° C	Dry and cloudy.	Calm (0 kph at 0).	16 km Low: overcast
Grotto wx 39 km NE 1101m alt. 2 hours ago	1° C	-	Calm (0 kph at 194).
Auburn 39 km SW 119m alt. 23 minutes ago		-	Calm (2 kph at 336).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	0° C	Fog -.	Light winds from the N (7 kph at 1).	0 km
SHIP7562 43 km W 15m alt. 2 hours ago				- km

* 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.