– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 pm Tue 28 Apr Local Time
Updates in:
hr min s
Update imminent

Issued: 10 pm Tue 28 Apr 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 12°C on Thu afternoon, min 1°C on Tue night). Wind will be generally light.										Days 5–7 Weather Summary Mostly dry. Very mild (max 18°C on Sun afternoon, min 9°C on Fri night). Wind will be generally light.
		Wednesday 29			Thursday 30			Friday 1			Saturday 2			Sunday 3			Monday 4
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	some clouds	clear	clear	clear	clear	clear	some clouds	clear	some clouds	rain shwrs	light rain	clear	risk tstorm	clear	some clouds	clear	clear	clear	clear
km/h	N	E	N	ESE	ESE	NW	SSW	SSW	WNW	NNE	ENE	NE	ENE	ENE	N	SSE	NW	W	SW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	0.6	0.2	—	0.1	—	—	—	—	—	—
max °C	2	6	9	10	11	12	11	11	10	9	12	15	15	17	18	18	14	13	10
min °C	1	4	8	9	10	11	10	10	10	9	9	14	15	16	18	15	13	12	5
chill °C	-2	3	7	9	9	10	10	10	10	9	8	13	14	16	18	15	13	11	3

Freezing level m	1500	2300	2650	2750	2850	2950	2950	2850	2900	3000	2950	3150	3400	3350	3500	3400	3450	3650	3750
Cloud base (m)	650					8750	9000	8600	2900	3400	2150	2550	8750		3400			9400	450

	—	5:52	—	—	5:52	—	—	5:50	—	—	5:48	—	—	5:47	—	—	5:45	—	—
	—	—	—	8:15	—	—	8:16	—	—	8:17	—	—	8:19	—	—	8:21	—	—	8:22

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Very mild (max 12°C on Thu afternoon, min 1°C on Tue night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Very mild (max 18°C on Sun afternoon, min 9°C on Fri 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. 42 minutes ago	9° C	Dry	Calm (0 kph at 289).
Snoqualmie Pass 30 km ESE 824m alt. 43 minutes ago	5° C	-	Calm (0 kph at 47).
Renton 30 km WSW 160m alt. 52 minutes ago	9° C	Dry	Calm (0 kph at 29).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Calm (2 kph at 0).
Grotto wx 35 km NE 321m alt. 54 minutes ago	8° C	Dry	Calm (0 kph at 240).
Renton Airport 36 km WSW 218m alt. 2 hours ago	12° C	Dry and cloudy.	Light winds from the NW (6 kph at 310).	16 km Low: overcast
Grotto wx 39 km NE 1101m alt. 46 minutes ago	3° C	Dry	Calm (0 kph at 70).
Auburn 39 km SW 119m alt. 38 minutes ago	8° C	Dry	Calm (0 kph at 63).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	2° C	Light rain .	Wind obs. (6 kph from 1 degs) was rejected.	0 km
Woodinville 43 km WNW 137.2m alt. 1 hour ago	4° C	Dry	Calm (5 kph at 356).

* 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.