– Lat/Long: 47.51° N 121.74° W

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

Issued: 10 pm Tue 05 May Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Mostly dry. Very mild (max 12°C on Tue night, min 4°C on Wed night). Wind will be generally light.										Days 5–7 Weather Summary Some drizzle, heaviest during Sun night. Very mild (max 12°C on Sat afternoon, min 4°C on Sun night). Wind will be generally light.
		Wednesday 6			Thursday 7			Friday 8			Saturday 9			Sunday 10			Monday 11
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

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

Freezing level m	3550	3400	3150	3100	3200	3350	3350	2250	2500	2700	3400	3400	3200	2500	2350	2100	2450	3000	3150
Cloud base (m)		8800	1850	1850		7150	6300	5600	2250		9450		5200	7600	2100	850	600	5950	8750

	—	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. Very mild (max 12°C on Tue night, min 4°C on Wed night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Some drizzle, heaviest during Sun night. Very mild (max 12°C on Sat 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	14° C	Dry	Wind obs. (8 kph from 41 degs) was rejected.
Renton 30 km WSW 160m alt. 2 hours ago	12° C	Dry	Calm (0 kph at 217).
Black Diamond 32 km SSW 192m alt. 1 hour ago	14° C	Dry	Calm (0 kph at 0).
Grotto wx 35 km NE 321m alt. 1 hour ago	12° C	Dry	Calm (0 kph at 288).
Renton Airport 36 km WSW 218m alt. 3 hours ago	14° C	Clear	Calm (0 kph at 0).	16 km
Grotto wx 39 km NE 1101m alt. 2 hours ago	6° C	Dry	Calm (0 kph at 49).
Auburn 39 km SW 119m alt. 3 hours ago	9° C	Dry	Calm (0 kph at 59).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	8° C	Fog -.	Light winds from the SSW (11 kph at 210).	0 km
SHIP14197 43 km W 15m alt. 4 hours ago				- km
SHIP8826 43 km W 15m alt. 4 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.