– Lat/Long: 47.51° N 121.74° W

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

Issued: 4 pm Thu 18 Jun 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 25°C on Fri afternoon, min 11°C on Fri night). Wind will be generally light.											Days 5–7 Weather Summary Mostly dry. Warm (max 27°C on Mon afternoon, min 11°C on Tue night). Wind will be generally light.
	Thu 18		Friday 19			Saturday 20			Sunday 21			Monday 22			Tuesday 23
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	some clouds	some clouds	clear	clear	clear	clear	clear	clear	clear	clear	clear	clear	some clouds	cloudy	clear	some clouds
km/h	NW	ESE	W	W	SSW	WSW	W	ENE	NW	NW	E	WSW	NW	ESE	WNW	WNW	S
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	22	19	23	25	22	16	20	18	18	23	20	24	27	23	23	26	22
min °C	22	16	19	24	11	13	19	11	14	21	15	20	26	19	21	26	11
chill °C	22	16	19	24	10	13	19	11	14	21	15	20	26	19	21	26	11

Freezing level m	4150	4100	3950	4050	3950	3650	3650	3600	3450	3700	3750	3700	4000	3950	3800	3950	3800
Cloud base (m)		7100	5350	5350				9150							6350

	—	—	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. Warm (max 25°C on Fri afternoon, min 11°C on Fri night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Warm (max 27°C on Mon afternoon, min 11°C on Tue 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. 2 hours ago	22° C	Dry	Calm (0 kph at 326).
Snoqualmie Pass 30 km ESE 824m alt. 36 minutes ago	20° C	-	Calm (0 kph at 351).
Grotto wx 35 km NE 321m alt. 1 hour ago	24° C	Dry	Light winds from the WSW (13 kph at 257).
Renton Airport 36 km WSW 218m alt. 2 hours ago	25° C	Clear	Moderate winds from the NNW (20 kph at 330).	16 km
Grotto wx 39 km NE 1101m alt. 39 minutes ago	16° C	Dry	Calm (0 kph at 352).
Auburn 39 km SW 119m alt. 59 minutes ago	28° C	Dry	Calm (5 kph at 207).
Stampede Pass Airport 40 km SE 628m alt. 48 minutes ago	18° C	Clear	Wind obs. (6 kph from 1 degs) was rejected.	16 km
SHIP1878 42 km WSW 15m alt. 3 hours ago			Light winds from the NNW (19 kph at 340).	- km
SHIP6237 42 km WSW 15m alt. 3 hours ago			Light winds from the NNW (19 kph at 340).	- km
SHIP7956 42 km WSW 3m alt. 3 hours ago	16° C		Light winds from the NNW (18 kph at 340).

* 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.