– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 pm Sat 18 Jul Local Time
Updates in:
hr min s
Update imminent

Issued: 4 pm Sat 18 Jul Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Mostly dry. Warm (max 27°C on Mon afternoon, min 12°C on Sat night). Wind will be generally light.											Days 5–7 Weather Summary Mostly dry. Warm (max 29°C on Tue afternoon, min 13°C on Thu night). Wind will be generally light.
	Sat 18		Sunday 19			Monday 20			Tuesday 21			Wednesday 22			Thursday 23
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	some clouds	clear	clear	clear	clear	some clouds	cloudy	some clouds	some clouds	cloudy	clear	clear	clear	clear	some clouds	clear	clear
Cloud base (m)	1700						6900	6600	6200	5350	5350	8700	5200	5750	6450
km/h	NW	NE	NW	NW	E	E	WNW	ESE	WNW	NW	E	NW	WNW	SSE	W	WSW	S
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	20	18	19	23	20	24	27	24	27	29	25	26	28	26	22	25	21
min °C	18	12	15	22	16	20	26	21	23	29	20	22	28	18	20	24	13
chill °C	18	12	15	22	16	20	26	21	23	29	20	22	28	18	20	24	13

Freezing level m	3850	4150	4100	4300	4500	4550	4650	4550	4600	4750	4700	4500	4600	4350	4100	4100	3900

	—	—	5:28	—	—	5:30	—	—	5:31	—	—	5:31	—	—	5:33	—	—
	—	8:57	—	—	8:55	—	—	8:54	—	—	8:53	—	—	8:52	—	—	8:52

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Warm (max 27°C on Mon afternoon, min 12°C on Sat night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Warm (max 29°C on Tue afternoon, min 13°C on Thu night). Wind will be generally light.

This table gives the weather forecast for Mount Si at the specific elevation of 500 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
Renton 30 km WSW 160m alt. 1 hour ago	23° C	Dry	Calm (2 kph at 300).
Black Diamond 32 km SSW 192m alt. 56 minutes ago		-	Calm (0 kph at 0).
Renton Airport 36 km WSW 218m alt. 3 hours ago	24° C	Clear	Light winds from the N (9 kph at 0).	16 km
Auburn 39 km SW 119m alt. 1 hour ago	23° C	Dry	Calm (0 kph at 160).
Stampede Pass Airport 40 km SE 628m alt. 3 hours ago	15° C	Dry and partly cloudy.	Wind obs. (6 kph from 1 degs) was rejected.	16 km Low: broken
Seattl / oeing Airport 44 km WSW 218m alt. 3 hours ago	23° C	-	Light winds from the N (7 kph at 1).	16 km Low: few
Seattle Tacoma International Airport 44 km WSW 218m alt. 3 hours ago	23° C	-	Light winds from the WNW (17 kph at 300).	16 km Low: few
Snohomish 49 km NW 196m alt. 1 hour ago	21° C	Dry	Calm (5 kph at 233).
Seattle 49 km WSW 100m alt. 1 hour ago	25° C	-
BUOY-WPOW1 55 km W 3m alt. 1 hour ago	18° C		Light winds from the NE (9 kph at 40).

* 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.