– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 pm Wed 17 Jun Local Time
Updates in:
hr min s
Update imminent

Issued: 10 pm Wed 17 Jun Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Mostly dry. Very mild (max 17°C on Fri morning, min 9°C on Wed night). Wind will be generally light.										Days 5–7 Weather Summary Mostly dry. Warm (max 20°C on Mon afternoon, min 9°C on Sat night). Wind will be generally light.
		Thursday 18			Friday 19			Saturday 20			Sunday 21			Monday 22			Tuesday 23
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	clear	some clouds	some clouds	some clouds	clear	clear	clear	clear	clear	clear	clear	clear	clear	clear	some clouds	clear	clear
km/h	N	E	NNW	ESE	S	W	SW	SW	W	N	NNW	NW	N	SE	NNW	N	WNW	WNW	N
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	11	12	15	16	17	17	17	9	13	12	11	15	15	18	20	20	18	19	18
min °C	9	11	15	16	16	17	10	9	11	9	10	14	14	16	19	18	18	18	14
chill °C	7	11	15	16	16	17	8	7	10	8	9	14	14	16	19	18	18	18	13

Freezing level m	4100	4150	4200	4150	4050	4100	3900	3700	3750	3700	3500	3700	3900	3800	4050	4000	4000	4150	3900
Cloud base (m)				7150	5650	5000							9550	8600	9000		6800	6450	6500

	—	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 17°C on Fri morning, min 9°C on Wed night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Warm (max 20°C on Mon afternoon, min 9°C on Sat 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. 52 minutes ago	9° C	Dry	Calm (0 kph at 323).
Snoqualmie Pass 30 km ESE 824m alt. 1 hour ago	6° C	-	Calm (0 kph at 129).
Renton 30 km WSW 160m alt. 59 minutes ago	12° C	Dry	Calm (0 kph at 3).
Black Diamond 32 km SSW 192m alt. 2 hours ago		-	Light winds from the SE (8 kph at 131).
Grotto wx 35 km NE 321m alt. 49 minutes ago	11° C	Dry	Calm (3 kph at 88).
Renton Airport 36 km WSW 218m alt. 3 hours ago	14° C	Clear	Calm (0 kph at 0).	16 km
Grotto wx 39 km NE 1101m alt. 40 minutes ago	4° C	Dry	Calm (0 kph at 327).
Auburn 39 km SW 119m alt. 1 hour ago	22° C	Dry	Calm (0 kph at 270).
Stampede Pass Airport 40 km SE 628m alt. 3 hours ago	7° C	Clear	Wind obs. (9 kph from 1 degs) was rejected.	16 km
SHIP7528 42 km WSW 15m alt. 1 hour ago			Calm (6 kph at 330).	- 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.