– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 am Fri 19 Jun Local Time
Updates in:
hr min s
Update imminent

Issued: 4 am Fri 19 Jun Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Mostly dry. Very mild (max 18°C on Fri afternoon, min 9°C on Sat morning). Wind will be generally light.									Days 4–6 Weather Summary Mostly dry. Warm (max 20°C on Mon afternoon, min 5°C on Wed night). Wind will be generally light.
	Friday 19			Saturday 20			Sunday 21			Monday 22			Tuesday 23			Wednesday 24
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	clear	clear	clear	clear	clear	clear	clear	clear	clear	clear	some clouds	some clouds	some clouds	some clouds	some clouds	rain shwrs
km/h	S	W	SW	SW	W	N	N	NNW	NNE	SE	NNW	SE	S	WNW	NNE	SW	W	W
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	0.3
max °C	17	18	17	9	13	12	10	15	15	19	20	20	20	19	18	10	13	9
min °C	17	18	10	9	11	9	9	13	14	17	20	19	20	19	11	8	11	5
chill °C	17	18	8	6	10	8	8	13	14	17	20	19	20	19	10	7	10	2

Freezing level m	3900	4050	3900	3600	3600	3550	3450	3650	3550	3600	3950	3900	3850	3900	3750	3300	3050	2750
Cloud base (m)	5600	5400	9400			9300				8950	8900		6650	5600			1850	700

	5:09	—	—	5:09	—	—	5:09	—	—	5:09	—	—	5:09	—	—	5:09	—	—
	—	—	9:07	—	—	9:07	—	—	9:07	—	—	9:07	—	—	9:07	—	—	9:07

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Very mild (max 18°C on Fri afternoon, min 9°C on Sat morning). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Warm (max 20°C on Mon afternoon, min 5°C on Wed 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. 1 hour ago	11° C	Dry	Calm (0 kph at 239).
Snoqualmie Pass 30 km ESE 824m alt. 2 hours ago	10° C	-	Calm (0 kph at 4).
Renton 30 km WSW 160m alt. 2 hours ago	15° C	Dry	Calm (0 kph at 44).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Calm (0 kph at 0).
Grotto wx 35 km NE 321m alt. 1 hour ago	14° C	Dry	Calm (3 kph at 53).
Renton Airport 36 km WSW 218m alt. 3 hours ago	17° C	Clear	Light winds from the N (6 kph at 10).	16 km
Grotto wx 39 km NE 1101m alt. 1 hour ago	12° C	Dry	Calm (0 kph at 9).
Stampede Pass Airport 40 km SE 628m alt. 3 hours ago	14° C	Clear	Calm (0 kph at 0).	16 km
Seattl / oeing Airport 44 km WSW 218m alt. 3 hours ago	18° C	Clear	Calm (0 kph at 0).	16 km
Seattle Tacoma International Airport 44 km WSW 218m alt. 3 hours ago	17° C	Dry and partly cloudy.	Light winds from the N (7 kph at 10).	16 km Low: broken Mid: broken

* 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.