– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 pm Tue 28 Apr Local Time
Updates in:
hr min s
Update imminent

Issued: 4 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 11°C on Thu morning, min 1°C on Tue afternoon). Wind will be generally light.											Days 5–7 Weather Summary Mostly dry. Very mild (max 19°C on Sun afternoon, min 8°C on Fri night). Wind will be generally light.
	Tue 28		Wednesday 29			Thursday 30			Friday 1			Saturday 2			Sunday 3
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	rain shwrs	rain shwrs	clear	clear	clear	clear	some clouds	some clouds	clear	some clouds	rain shwrs	light rain	some clouds	rain shwrs	clear	clear	clear
km/h	W	N	E	N	ESE	SE	NW	WSW	WSW	WNW	NNE	E	NE	ENE	E	NNW	NNW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	0.1	0.1	—	—	—	—	—	—	—	—	0.1	0.1	—	0.1	—	—	—
max °C	2	2	6	9	9	11	11	11	9	9	9	11	15	15	17	19	18
min °C	1	2	4	8	9	10	11	9	9	9	8	9	13	15	16	18	16
chill °C	-2	0	3	8	9	9	11	9	9	9	7	7	12	14	16	18	16

Freezing level m	1550	1600	2300	2650	2800	2900	2950	3000	2850	2850	2950	2900	3200	3400	3450	3650	3700
Cloud base (m)	900	750				9300			8600			2700	2800			9200

	—	—	5:52	—	—	5:52	—	—	5:50	—	—	5:48	—	—	5:47	—	—
	—	8:14	—	—	8:15	—	—	8:16	—	—	8:17	—	—	8:19	—	—	8:21

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Very mild (max 11°C on Thu morning, min 1°C on Tue afternoon). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Very mild (max 19°C on Sun afternoon, min 8°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. 57 minutes ago	13° C	Dry	Calm (0 kph at 336).
Snoqualmie Pass 30 km ESE 824m alt. 1 hour ago	8° C	-	Calm (0 kph at 277).
Renton 30 km WSW 160m alt. 1 hour ago	13° C	Dry	Calm (2 kph at 292).
Black Diamond 32 km SSW 192m alt. 56 minutes ago		-	Calm (5 kph at 0).
Grotto wx 35 km NE 321m alt. 1 hour ago	11° C	Dry	Light winds from the W (10 kph at 267).
Renton Airport 36 km WSW 218m alt. 3 hours ago	14° C	Dry and cloudy.	Light winds from the N (6 kph at 1).	16 km Low: broken Mid: overcast
Grotto wx 39 km NE 1101m alt. 1 hour ago	4° C	Dry	Calm (3 kph at 115).
Auburn 39 km SW 119m alt. 2 hours ago		-	Calm (0 kph at 26).
Stampede Pass Airport 40 km SE 628m alt. 3 hours ago	4° C	Dry and cloudy.	Wind obs. (7 kph from 1 degs) was rejected.	16 km Low: overcast
Woodinville 43 km WNW 137.2m alt. 53 minutes ago	11° C	Dry	Wind obs. (23 kph from 310 degs) was rejected.

* 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.