– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 pm Wed 20 May Local Time
Updates in:
hr min s
Update imminent

Issued: 4 pm Wed 20 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 19°C on Thu afternoon, min 10°C on Wed night). Wind will be generally light.											Days 5–7 Weather Summary Heavy rain (total 27mm), heaviest during Sun night. Very mild (max 19°C on Sat afternoon, min 7°C on Sun night). Wind will be generally light.
	Wed 20		Thursday 21			Friday 22			Saturday 23			Sunday 24			Monday 25
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	some clouds	some clouds	clear	some clouds	clear	clear	clear	some clouds	some clouds	clear	some clouds	some clouds	some clouds	heavy rain	mod. rain	mod. rain	rain shwrs
km/h	NW	E	WNW	WNW	ENE	WNW	WNW	ESE	WNW	WNW	WSW	SW	W	SW	SW	WNW	NW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	10	7	7	3
max °C	15	13	17	19	16	15	19	16	15	19	16	13	14	9	8	7	7
min °C	14	10	14	19	11	13	18	10	12	18	8	10	14	7	8	7	7
chill °C	14	10	14	19	11	13	18	10	12	18	7	9	13	5	5	4	6

Freezing level m	2900	2950	2900	3050	3000	3100	3350	3400	3350	3250	2950	2800	2400	1800	1700	1600	1800
Cloud base (m)		6900	6450	5700	8750	8600	2100	6950	550	8050	1650	5800	1600	400	400	400	450

	—	—	5:22	—	—	5:22	—	—	5:20	—	—	5:20	—	—	5:18	—	—
	—	8:43	—	—	8:44	—	—	8:45	—	—	8:45	—	—	8:46	—	—	8:49

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Very mild (max 19°C on Thu afternoon, min 10°C on Wed night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Heavy rain (total 27mm), heaviest during Sun night. Very mild (max 19°C on Sat afternoon, min 7°C on Sun 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. 35 minutes ago	17° C	Dry	Calm (0 kph at 319).
Snoqualmie Pass 30 km ESE 824m alt. 1 hour ago	14° C	-	Calm (0 kph at 222).
Renton 30 km WSW 160m alt. 1 hour ago	18° C	Dry	Calm (0 kph at 359).
Black Diamond 32 km SSW 192m alt. 53 minutes ago		-	Wind obs. (13 kph from 246 degs) was rejected.
Grotto wx 35 km NE 321m alt. 2 hours ago	18° C	Dry	Light winds from the WSW (14 kph at 250).
Renton Airport 36 km WSW 218m alt. 2 hours ago	20° C	Clear	Light winds from the NNW (13 kph at 330).	16 km
Grotto wx 39 km NE 1101m alt. 36 minutes ago	11° C	Dry	Calm (0 kph at 46).
Auburn 39 km SW 119m alt. 1 hour ago		-	Calm (0 kph at 155).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	11° C	Clear	Wind obs. (9 kph from 1 degs) was rejected.	16 km
Woodinville 43 km WNW 137.2m alt. 47 minutes ago	17° C	Dry	Wind obs. (16 kph from 274 degs) was rejected.

* 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.