– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 pm Sun 17 May Local Time
Updates in:
hr min s
Update imminent

Issued: 4 pm Sun 17 May Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Some drizzle, heaviest during Tue afternoon. Very mild (max 15°C on Mon afternoon, min 6°C on Sun night). Wind will be generally light.											Days 5–7 Weather Summary Mostly dry. Very mild (max 19°C on Thu afternoon, min 9°C on Thu night). Wind will be generally light.
	Sun 17		Monday 18			Tuesday 19			Wednesday 20			Thursday 21			Friday 22
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	rain shwrs	some clouds	some clouds	clear	some clouds	light rain	rain shwrs	rain shwrs	rain shwrs	rain shwrs	some clouds	some clouds	clear	clear	some clouds	some clouds	some clouds
km/h	NW	ESE	WNW	WNW	NW	W	W	NW	NW	NW	E	W	NW	S	W	WNW	WNW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	0.2	—	—	—	—	0.1	0.4	0.3	0.3	0.1	—	—	—	—	—	—	—
max °C	12	10	11	15	11	9	11	10	11	15	13	16	19	16	12	16	14
min °C	9	6	8	14	8	8	10	8	9	12	10	13	18	9	10	14	10
chill °C	9	6	8	14	8	8	10	8	9	12	10	13	18	9	10	14	10

Freezing level m	2000	2000	1850	2250	2150	2000	2250	2500	2500	3200	3050	3100	3050	3200	3200	3000	3350
Cloud base (m)	750		950	1900	1700	450	700	1900	650	900		5000	3250	9300	500	700	850

	—	—	5:26	—	—	5:24	—	—	5:24	—	—	5:22	—	—	5:22	—	—
	—	8:38	—	—	8:39	—	—	8:42	—	—	8:43	—	—	8:44	—	—	8:45

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Some drizzle, heaviest during Tue afternoon. Very mild (max 15°C on Mon afternoon, min 6°C on Sun night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Very mild (max 19°C on Thu afternoon, min 9°C on Thu 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	20° C	Dry	Calm (2 kph at 8).
Snoqualmie Pass 30 km ESE 824m alt. 1 hour ago	11° C	-	Calm (0 kph at 236).
Renton 30 km WSW 160m alt. 1 hour ago	18° C	Dry	Calm (2 kph at 311).
Black Diamond 32 km SSW 192m alt. 49 minutes ago		-	Wind obs. (10 kph from 148 degs) was rejected.
Grotto wx 35 km NE 321m alt. 2 hours ago	13° C	Dry	Wind obs. (6 kph from 234 degs) was rejected.
Renton Airport 36 km WSW 218m alt. 2 hours ago	16° C	Clear	Light winds from the WNW (11 kph at 290).	16 km
Grotto wx 39 km NE 1101m alt. 35 minutes ago	6° C	Dry	Calm (0 kph at 154).
Auburn 39 km SW 119m alt. 1 hour ago		-	Calm (3 kph at 252).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	3° C	Fog -.	Light winds from the N (7 kph at 1).	1 km
Woodinville 43 km WNW 137.2m alt. 41 minutes ago	12° C	Dry	Wind obs. (24 kph from 278 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.