– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 pm Sun 26 Apr Local Time
Updates in:
hr min s
Update imminent

Issued: 10 pm Sun 26 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 15°C on Wed afternoon, min 5°C on Tue night). Wind will be generally light.										Days 5–7 Weather Summary Some drizzle, heaviest during Fri morning. Very mild (max 16°C on Thu afternoon, min 6°C on Fri night). Wind will be generally light.
		Monday 27			Tuesday 28			Wednesday 29			Thursday 30			Friday 1			Saturday 2
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	rain shwrs	some clouds	some clouds	light rain	light rain	light rain	rain shwrs	clear	clear	clear	some clouds	some clouds	light rain	light rain	rain shwrs	rain shwrs	some clouds	rain shwrs	clear
km/h	S	WSW	WSW	SW	SW	WSW	N	NW	NW	ESE	W	W	WNW	NW	NW	NNW	NNW	NNW	E
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	0.2	—	—	0.2	0.1	0.2	0.1	—	—	—	—	—	0.1	0.5	0.5	0.3	—	0.1	—
max °C	11	9	10	8	6	8	8	11	15	12	14	16	11	7	9	9	11	16	13
min °C	6	7	10	6	6	7	5	8	15	9	11	16	7	7	8	6	8	15	11
chill °C	5	6	9	5	5	6	5	8	15	9	11	16	7	7	8	6	8	15	11

Freezing level m	1900	1500	1800	1450	1450	1600	1700	2200	2550	2650	2500	2500	2100	1800	1950	1900	2150	2600	2950
Cloud base (m)	2150	750	1650	950	650	700	1600	1650		2550	2750	2000	1900	450	450	650	750	1700

	—	5:56	—	—	5:54	—	—	5:52	—	—	5:52	—	—	5:50	—	—	5:48	—	—
	—	—	—	8:12	—	—	8:14	—	—	8:15	—	—	8:16	—	—	8:17	—	—	8:19

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Very mild (max 15°C on Wed afternoon, min 5°C on Tue night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Some drizzle, heaviest during Fri morning. Very mild (max 16°C on Thu afternoon, min 6°C on Fri 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	8° C	Dry	Calm (0 kph at 160).
Snoqualmie Pass 30 km ESE 824m alt. 44 minutes ago	-1° C	-	Calm (0 kph at 17).
Renton 30 km WSW 160m alt. 39 minutes ago	9° C	Dry	Calm (2 kph at 166).
Black Diamond 32 km SSW 192m alt. 2 hours ago		-	Calm (0 kph at 0).
Grotto wx 35 km NE 321m alt. 1 hour ago	7° C	Dry	Calm (5 kph at 42).
Renton Airport 36 km WSW 218m alt. 2 hours ago	11° C	Clear	Light winds from the S (15 kph at 180).	16 km
Grotto wx 39 km NE 1101m alt. 2 hours ago	1° C	-	Calm (0 kph at 352).
Auburn 39 km SW 119m alt. 1 hour ago	7° C	Dry	Calm (0 kph at 302).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	3° C	Clear	Calm (0 kph at 0).	16 km
SHIP3530 42 km WSW 15m alt. 3 hours ago			Light winds from the S (13 kph at 190).	- 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.