– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 am Wed 06 May Local Time
Updates in:
hr min s
Update imminent

Issued: 10 am Wed 06 May Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Mostly dry. Mild temperatures (max 9°C on Wed morning, min 4°C on Fri night). Wind will be generally light.									Days 4–6 Weather Summary Mostly dry. Very mild (max 12°C on Sun afternoon, min 4°C on Sun night). Wind will be generally light.
	Wednesday 6			Thursday 7			Friday 8			Saturday 9			Sunday 10			Monday 11
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

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

Freezing level m	3400	3200	3100	3200	3300	3400	2300	2350	2650	3400	3500	3450	3250	3200	2700	2500	2800	3100
Cloud base (m)	450	750	1500		6700	6350	5800	2250	1850		9250	6800	6350		8100	850	1950	9050

	5:41	—	—	5:41	—	—	5:39	—	—	5:37	—	—	5:35	—	—	5:35	—	—
	—	—	8:24	—	—	8:25	—	—	8:27	—	—	8:29	—	—	8:30	—	—	8:30

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Mild temperatures (max 9°C on Wed morning, min 4°C on Fri night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Very mild (max 12°C on Sun afternoon, min 4°C on Sun 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. 2 hours ago	13° C	Dry	Calm (0 kph at 339).
Renton 30 km WSW 160m alt. 51 minutes ago	13° C	Dry	Calm (3 kph at 225).
Black Diamond 32 km SSW 192m alt. 1 hour ago	25° C	Dry	Calm (3 kph at 296).
Grotto wx 35 km NE 321m alt. 30 minutes ago	15° C	Dry	Moderate winds from the W (26 kph at 271).
Renton Airport 36 km WSW 218m alt. 2 hours ago	14° C	Dry and cloudy.	Light winds from the SSW (13 kph at 200).	16 km Low: overcast
Grotto wx 39 km NE 1101m alt. 1 hour ago	13° C	Dry	Calm (3 kph at 53).
Auburn 39 km SW 119m alt. 1 hour ago	23° C	Dry	Calm (2 kph at 239).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	13° C	Clear	Light winds from the W.(Wind varies from 200 to 320 degs) (13 kph at 270).	16 km
SHIP10538 43 km W 15m alt. 3 hours ago				- km
SHIP3959 43 km W 15m alt. 3 hours ago				- 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.