– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 am Tue 05 May Local Time
Updates in:
hr min s
Update imminent

Issued: 10 am Tue 05 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 13°C on Tue afternoon, min 5°C on Wed night). Wind will be generally light.									Days 4–6 Weather Summary Mostly dry. Very mild (max 13°C on Sun morning, min 3°C on Fri morning). Wind will be generally light.
	Tuesday 5			Wednesday 6			Thursday 7			Friday 8			Saturday 9			Sunday 10
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	clear	clear	some clouds	some clouds	clear	some clouds	cloudy	cloudy	some clouds	clear	clear	clear	some clouds	clear	some clouds	clear
km/h	NW	NW	NW	SW	WSW	WSW	WNW	WSW	SW	SW	W	NNW	NNW	NNW	NW	S	W	W
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	11	13	12	10	9	7	6	8	8	4	7	6	7	11	11	13	13	12
min °C	11	12	10	8	9	5	5	8	5	3	4	4	6	10	10	11	13	7
chill °C	11	12	9	6	7	2	5	8	1	-1	0	2	4	9	10	11	13	5

Freezing level m	3350	3450	3600	3450	3150	2950	3250	3300	3200	1700	2250	2550	3300	3450	3550	3500	3550	3250
Cloud base (m)				9000	1900			7100	6050		2700	2100	8900	9000	7150	9350	5450	4550

	5:43	—	—	5:41	—	—	5:41	—	—	5:39	—	—	5:37	—	—	5:35	—	—
	—	—	8:22	—	—	8:24	—	—	8:25	—	—	8:27	—	—	8:29	—	—	8:30

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Very mild (max 13°C on Tue afternoon, min 5°C on Wed night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Very mild (max 13°C on Sun morning, min 3°C on Fri morning). 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. 57 minutes ago	21° C	Dry	Calm (0 kph at 324).
Renton 30 km WSW 160m alt. 2 hours ago	14° C	Dry	Calm (3 kph at 249).
Black Diamond 32 km SSW 192m alt. 46 minutes ago	23° C	Dry	Wind obs. (6 kph from 136 degs) was rejected.
Grotto wx 35 km NE 321m alt. 34 minutes ago	17° C	Dry	Light winds from the WSW (11 kph at 243).
Renton Airport 36 km WSW 218m alt. 2 hours ago	14° C	Dry and cloudy.	Light winds from the SW (7 kph at 230).	16 km Low: overcast
Grotto wx 39 km NE 1101m alt. 1 hour ago	21° C	Dry	Calm (3 kph at 31).
Auburn 39 km SW 119m alt. 1 hour ago	18° C	Dry	Calm (2 kph at 66).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	15° C	Clear	Wind obs. (9 kph from 1 degs) was rejected.	16 km
SHIP3975 42 km WSW 3m alt. 3 hours ago
SHIP3640 42 km WSW 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.