– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 am Fri 22 May Local Time
Updates in:
hr min s
Update imminent

Issued: 10 am Fri 22 May Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Mostly dry. Very mild (max 14°C on Fri afternoon, min 6°C on Sat night). Wind will be generally light.									Days 4–6 Weather Summary Light rain (total 8mm), mostly falling on Mon night. Mild temperatures (max 9°C on Mon afternoon, min 1°C on Mon night). Wind will be generally light.
	Friday 22			Saturday 23			Sunday 24			Monday 25			Tuesday 26			Wednesday 27
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	some clouds	clear	some clouds	clear	some clouds	clear	cloudy	some clouds	some clouds	some clouds	cloudy	rain shwrs	rain shwrs	rain shwrs	rain shwrs	rain shwrs	rain shwrs	some clouds
km/h	NNW	WNW	WNW	SW	WSW	SW	SW	SW	SSW	W	WSW	SW	WNW	NW	NNW	NNW	NNW	NNW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	6	0.6	0.8	0.5	0.1	0.1	—
max °C	11	14	13	8	10	9	7	10	10	8	9	3	2	5	4	5	8	8
min °C	11	13	8	8	9	6	6	9	9	8	6	1	1	4	3	4	6	6
chill °C	10	12	7	6	8	4	3	7	6	8	2	-1	-1	2	-1	1	5	4

Freezing level m	2850	3200	3300	3250	3350	3150	3050	3100	3100	2550	2350	1550	1600	2000	2500	3450	3450	3600
Cloud base (m)	6350	9100	6850		6900	7100	6550	5950	7700	5650	2500	400	750	850	1800	800	900

	5:22	—	—	5:20	—	—	5:20	—	—	5:18	—	—	5:18	—	—	5:16	—	—
	—	—	8:45	—	—	8:45	—	—	8:46	—	—	8:49	—	—	8:50	—	—	8:51

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Very mild (max 14°C on Fri afternoon, min 6°C on Sat night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Light rain (total 8mm), mostly falling on Mon night. Mild temperatures (max 9°C on Mon afternoon, min 1°C on Mon 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. 1 hour ago	25° C	Dry	Calm (0 kph at 285).
Snoqualmie Pass 30 km ESE 824m alt. 27 minutes ago	23° C	-	Calm (0 kph at 345).
Renton 30 km WSW 160m alt. 1 hour ago	26° C	Dry	Calm (3 kph at 241).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Calm (2 kph at 209).
Grotto wx 35 km NE 321m alt. 2 hours ago	23° C	Dry	Light winds from the W (11 kph at 262).
Renton Airport 36 km WSW 218m alt. 2 hours ago	24° C	Clear	Light winds from the NNW (11 kph at 330).	16 km
Grotto wx 39 km NE 1101m alt. 2 hours ago	20° C	Dry	Calm (3 kph at 71).
Auburn 39 km SW 119m alt. 1 hour ago	29° C	Dry	Calm (2 kph at 209).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	18° C	Clear	Wind obs. (6 kph from 1 degs) was rejected.	16 km
SHIP3623 43 km W 15m alt. 2 hours ago			Light winds from the NNW (13 kph at 340).	- 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.