– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 am Sat 09 May Local Time
Updates in:
hr min s
Update imminent

Issued: 4 am Sat 09 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 Mon night, min 5°C on Sun night). Wind will be generally light.									Days 4–6 Weather Summary Mostly dry. Warm (max 21°C on Tue afternoon, min 1°C on Thu night). Winds increasing (calm on Tue night, fresh winds from the SW by Thu night).
	Saturday 9			Sunday 10			Monday 11			Tuesday 12			Wednesday 13			Thursday 14
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	cloudy	some clouds	cloudy	some clouds	rain shwrs	clear	clear	clear	some clouds	clear	some clouds	some clouds	cloudy	some clouds	clear	some clouds	some clouds
km/h	N	NW	SW	SW	WSW	NW	N	N	ESE	ESE	SE	ESE	NW	WSW	SW	SW	WSW	SW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	0.1	—	—	—	—	—	—	—	—	—	—	—	—
max °C	7	11	12	9	10	7	7	11	14	17	21	19	16	16	14	7	9	5
min °C	7	10	9	8	9	5	6	10	12	15	19	17	16	16	8	7	9	1
chill °C	5	10	9	6	7	3	3	10	12	14	19	17	16	16	5	3	6	-6

Freezing level m	3450	3450	3300	2900	2450	2700	3250	3500	3750	3900	3900	3950	3900	3650	3400	2800	2450	1550
Cloud base (m)	9000	6400	6500		2150	850	6200	6850	9100	6450	8350		4850		8800	5050	2650	700

	5:37	—	—	5:35	—	—	5:35	—	—	5:33	—	—	5:31	—	—	5:31	—	—
	—	—	8:29	—	—	8:30	—	—	8:30	—	—	8:32	—	—	8:34	—	—	8:35

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Very mild (max 14°C on Mon night, min 5°C on Sun night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Warm (max 21°C on Tue afternoon, min 1°C on Thu night). Winds increasing (calm on Tue night, fresh winds from the SW by Thu night).

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	10° C	Dry	Calm (0 kph at 167).
Renton 30 km WSW 160m alt. 25 minutes ago	8° C	Dry	Calm (0 kph at 32).
Black Diamond 32 km SSW 192m alt. 28 minutes ago		-	Calm (0 kph at 0).
Grotto wx 35 km NE 321m alt. 1 hour ago	8° C	Dry	Calm (0 kph at 67).
Renton Airport 36 km WSW 218m alt. 2 hours ago	12° C	Dry and partly cloudy.	Calm (0 kph at 0).	16 km Low: scattered
Grotto wx 39 km NE 1101m alt. 1 hour ago	2° C	-	Calm (0 kph at 69).
Auburn 39 km SW 119m alt. 1 hour ago	5° C	Dry	Calm (0 kph at 75).
Stampede Pass Airport 40 km SE 628m alt. 1 hour ago	4° C	Mist -.	Calm (0 kph at 0).	1 km Low: overcast
Woodinville 43 km WNW 137.2m alt. 24 minutes ago	3° C	Dry	Calm (0 kph at 132).
SHIP7007 44 km SW 15m alt. 2 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.