– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 pm Mon 04 May Local Time
Updates in:
hr min s
Update imminent

Issued: 4 pm Mon 04 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 15°C on Mon afternoon, min 4°C on Wed night). Wind will be generally light.											Days 5–7 Weather Summary Mostly dry. Very mild (max 12°C on Sun morning, min 2°C on Fri afternoon). Wind will be generally light.
	Mon 4		Tuesday 5			Wednesday 6			Thursday 7			Friday 8			Saturday 9
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	clear	clear	clear	clear	some clouds	some clouds	clear	some clouds	some clouds	cloudy	rain shwrs	rain shwrs	rain shwrs	clear	some clouds
km/h	WNW	N	NW	WNW	WNW	SW	SW	SW	W	W	SW	SW	WSW	WNW	NNW	NNW	NNW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	0.6	0.1	0.1	—	—
max °C	15	14	12	14	13	10	10	7	5	9	8	4	2	3	5	10	10
min °C	14	11	11	13	10	9	10	4	5	8	5	3	2	3	3	8	9
chill °C	13	10	11	13	8	7	8	2	4	7	1	-1	-1	-2	1	7	9

Freezing level m	3400	3450	3400	3450	3550	3400	3150	2650	3200	3350	3200	1650	1650	2100	3150	3400	3500
Cloud base (m)	8750					8950	2100	2400			5850		1600	850	800	8700	6400

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

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Very mild (max 15°C on Mon afternoon, min 4°C on Wed night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Very mild (max 12°C on Sun morning, min 2°C on Fri afternoon). 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	27° C	Dry	Calm (3 kph at 282).
Renton 30 km WSW 160m alt. 2 hours ago	26° C	Dry	Calm (5 kph at 254).
Black Diamond 32 km SSW 192m alt. 1 hour ago	22° C	Dry	Calm (0 kph at 0).
Grotto wx 35 km NE 321m alt. 59 minutes ago	26° C	Dry	Light winds from the WSW (14 kph at 258).
Renton Airport 36 km WSW 218m alt. 2 hours ago	26° C	Clear	Light winds from the W (7 kph at 260).	13 km
Grotto wx 39 km NE 1101m alt. 3 hours ago	21° C	Dry	Calm (3 kph at 46).
Auburn 39 km SW 119m alt. 38 minutes ago	24° C	Dry	Calm (0 kph at 279).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	20° C	Clear	Light winds from the WNW.(Wind varies from 260 to 330 degs) (13 kph at 300).	16 km
SHIP8174 42 km WSW 15m alt. 3 hours ago				- km
SHIP6399 42 km WSW 3m alt. 3 hours ago

* 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.