– 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 16°C on Wed afternoon, min 6°C on Wed night). Wind will be generally light.										Days 5–7 Weather Summary Some drizzle, heaviest during Sun night. Very mild (max 19°C on Sat afternoon, min 8°C on Fri 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	some clouds	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	NE	WSW	WSW	W	WNW	W	SSW	SW	W	SSE	WNW	WNW	S	WSW	WNW	WNW	NW	NW	ENE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	0.1	0.8	0.8	0.1	—
max °C	15	15	16	13	12	16	13	11	15	13	15	19	15	14	16	11	10	15	12
min °C	11	12	16	6	8	15	10	10	14	8	11	18	11	12	15	9	9	14	8
chill °C	11	12	16	6	8	15	9	9	13	8	11	18	11	12	15	8	9	14	8

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 16°C on Wed afternoon, min 6°C on Wed night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Some drizzle, heaviest during Sun night. Very mild (max 19°C on Sat afternoon, min 8°C on Fri night). Wind will be generally light.

This table gives the weather forecast for Mount Si at the specific elevation of 500 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. 58 minutes ago	12° C	Dry	Calm (0 kph at 171).
Renton 30 km WSW 160m alt. 59 minutes ago	12° C	Dry	Calm (2 kph at 204).
Black Diamond 32 km SSW 192m alt. 2 hours ago	14° C	Dry	Calm (3 kph at 0).
Grotto wx 35 km NE 321m alt. 1 hour ago	12° C	Dry	Calm (2 kph at 63).
Renton Airport 36 km WSW 218m alt. 2 hours ago	13° C	Dry and cloudy.	Light winds from the S (11 kph at 180).	16 km Low: overcast
Grotto wx 39 km NE 1101m alt. 1 hour ago	5° C	Dry	Calm (0 kph at 49).
Auburn 39 km SW 119m alt. 1 hour ago	6° C	Dry	Calm (0 kph at 213).
Stampede Pass Airport 40 km SE 628m alt. 3 hours ago	8° C	Fog -.	Wind obs. (9 kph from 210 degs) was rejected.	0 km
SHIP7220 43 km W 15m alt. 3 hours ago				- km
SHIP3927 43 km W 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.