– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 pm Mon 29 Jun Local Time
Updates in:
hr min s
Update imminent

Issued: 10 pm Mon 29 Jun Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Some drizzle, heaviest during Thu afternoon. Very mild (max 17°C on Thu afternoon, min 9°C on Tue night). Wind will be generally light.										Days 5–7 Weather Summary Light rain (total 6mm), mostly falling on Thu night. Warm (max 20°C on Sun afternoon, min 8°C on Sat night). Wind will be generally light.
		Tuesday 30			Wednesday 1			Thursday 2			Friday 3			Saturday 4			Sunday 5
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	cloudy	light rain	rain shwrs	some clouds	cloudy	light rain	some clouds	some clouds	light rain	mod. rain	light rain	rain shwrs	clear	clear	some clouds	clear	some clouds	clear	some clouds
km/h	W	WSW	WSW	WNW	WSW	W	W	WNW	WSW	W	WSW	WSW	SSW	WSW	W	E	NW	NW	E
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	0.1	0.2	—	—	0.2	—	—	0.6	5	0.4	0.3	—	—	—	—	—	—	—
max °C	11	11	14	14	11	13	12	15	17	12	12	17	16	15	19	15	15	20	17
min °C	10	10	12	9	10	12	9	11	13	11	12	16	10	12	18	8	11	18	12
chill °C	10	10	12	9	10	12	9	11	13	11	12	16	10	11	18	8	11	18	12

Freezing level m	3550	3250	3200	3150	2700	2800	3400	3100	2950	2850	3400	3650	3500	3200	3350	3700	3650	3850	4050
Cloud base (m)	400	550	800	1700	600	750	700	600	1750	400	550	750	1700		2400		6450

	—	5:11	—	—	5:13	—	—	5:13	—	—	5:13	—	—	5:15	—	—	5:16	—	—
	—	—	—	9:07	—	—	9:07	—	—	9:07	—	—	9:07	—	—	9:06	—	—	9:06

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Some drizzle, heaviest during Thu afternoon. Very mild (max 17°C on Thu afternoon, min 9°C on Tue night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Light rain (total 6mm), mostly falling on Thu night. Warm (max 20°C on Sun afternoon, min 8°C on Sat 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
Harman Heights wx 6 km SSW 251m alt. 1 hour ago	14° C	Dry	Calm (0 kph at 149).
Snoqualmie Pass 30 km ESE 824m alt. 1 hour ago	10° C	-	Calm (0 kph at 167).
Renton 30 km WSW 160m alt. 2 hours ago	13° C	Dry	Calm (0 kph at 219).
Grotto wx 35 km NE 321m alt. 3 hours ago	12° C	Dry	Calm (3 kph at 262).
Renton Airport 36 km WSW 218m alt. 3 hours ago	14° C	Dry and cloudy.	Light winds from the S (9 kph at 180).	16 km Low: overcast
Stampede Pass Airport 40 km SE 628m alt. 3 hours ago	7° C	Light rain .	Wind obs. (7 kph from 1 degs) was rejected.	0 km
Seattl / oeing Airport 44 km WSW 218m alt. 3 hours ago	13° C	Dry and partly cloudy.	Light winds from the S (9 kph at 180).	16 km Low: broken
Seattle Tacoma International Airport 44 km WSW 218m alt. 3 hours ago	12° C	Dry and cloudy.	Light winds from the S (9 kph at 190).	16 km Low: broken Mid: overcast
Snohomish 49 km NW 196m alt. 1 hour ago	13° C	Dry	Wind obs. (6 kph from 235 degs) was rejected.
SHIP2427 54 km W 3m alt. 2 hours ago

* 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.