– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 am Mon 18 May Local Time
Updates in:
hr min s
Update imminent

Issued: 10 am Mon 18 May Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Some drizzle, heaviest during Tue afternoon. Mild temperatures (max 9°C on Wed afternoon, min 4°C on Mon morning). Wind will be generally light.									Days 4–6 Weather Summary Mostly dry. Very mild (max 13°C on Fri afternoon, min 5°C on Sat night). Wind will be generally light.
	Monday 18			Tuesday 19			Wednesday 20			Thursday 21			Friday 22			Saturday 23
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	some clouds	some clouds	light rain	light rain	rain shwrs	rain shwrs	rain shwrs	some clouds	some clouds	clear	clear	clear	clear	clear	some clouds	some clouds	some clouds	clear
km/h	NNW	WNW	WNW	W	WNW	N	N	NW	N	S	WNW	NNW	NNW	NW	NW	W	WSW	SSW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	0.1	0.2	0.8	0.6	0.1	—	—	—	—	—	—	—	—	—	—	—
max °C	5	7	6	4	5	5	5	9	9	11	12	12	10	13	12	8	11	8
min °C	4	6	4	4	4	4	4	7	8	10	12	10	9	12	9	8	10	5
chill °C	2	4	2	2	3	2	2	6	7	10	12	9	9	12	8	7	10	1

Freezing level m	1950	2250	2100	2000	2150	2550	2500	3050	3250	3150	3300	3300	3300	3600	3550	3200	3200	2900
Cloud base (m)	1550	1950	1500	550	650	2000	550	750	6900	5300	9150	9300	9100			550	1450

	5:26	—	—	5:24	—	—	5:24	—	—	5:22	—	—	5:22	—	—	5:20	—	—
	—	—	8:39	—	—	8:42	—	—	8:43	—	—	8:44	—	—	8:45	—	—	8:45

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Some drizzle, heaviest during Tue afternoon. Mild temperatures (max 9°C on Wed afternoon, min 4°C on Mon morning). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Very mild (max 13°C on Fri afternoon, min 5°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. 35 minutes ago	18° C	Dry	Calm (0 kph at 314).
Snoqualmie Pass 30 km ESE 824m alt. 2 hours ago	13° C	-	Calm (0 kph at 0).
Renton 30 km WSW 160m alt. 1 hour ago	13° C	Dry	Calm (3 kph at 213).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Wind obs. (18 kph from 360 degs) was rejected.
Grotto wx 35 km NE 321m alt. 1 hour ago	13° C	Dry	Calm (5 kph at 266).
Renton Airport 36 km WSW 218m alt. 2 hours ago	13° C	Clear	Light winds from the SSE (7 kph at 150).	16 km
Grotto wx 39 km NE 1101m alt. 40 minutes ago	9° C	Dry	Calm (3 kph at 161).
Auburn 39 km SW 119m alt. 1 hour ago		-	Wind obs. (6 kph from 274 degs) was rejected.
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	5° C	Clear	Light winds from the N (7 kph at 1).	16 km
Woodinville 43 km WNW 137.2m alt. 2 hours ago	14° C	Dry	Wind obs. (6 kph from 340 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.