– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 am Fri 15 May Local Time
Updates in:
hr min s
Update imminent

Issued: 10 am Fri 15 May Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Heavy rain (total 30mm), heaviest during Fri afternoon. Very mild (max 11°C on Sun afternoon, min 4°C on Fri night). Wind will be generally light.									Days 4–6 Weather Summary Light rain (total 9mm), mostly falling on Mon night. Very mild (max 16°C on Wed afternoon, min 7°C on Mon night). Wind will be generally light.
	Friday 15			Saturday 16			Sunday 17			Monday 18			Tuesday 19			Wednesday 20
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light rain	mod. rain	mod. rain	rain shwrs	rain shwrs	rain shwrs	light rain	rain shwrs	cloudy	some clouds	rain shwrs	mod. rain	rain shwrs	rain shwrs	rain shwrs	some clouds	clear	clear
km/h	SW	SW	SW	WSW	NNW	N	NW	NNW	E	WNW	WNW	WNW	W	NW	NW	NW	NW	E
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	3	10	6	5	6	1.1	0.2	0.2	—	—	0.2	5	2	1.5	0.3	—	—	—
max °C	5	5	5	5	7	6	6	11	9	11	13	10	9	13	11	10	16	13
min °C	5	5	4	4	7	4	5	9	6	8	11	7	8	11	8	8	15	8
chill °C	2	2	0	3	6	2	5	9	6	8	11	7	8	11	8	8	15	8

Freezing level m	1200	1300	1200	1200	1400	1150	1300	1850	1900	1850	2050	1800	1850	2200	2250	2250	2850	3300
Cloud base (m)	600	400	400	450	700	500	600	800	1550	1600	950	450	500	850	900	650	950	2050

	5:30	—	—	5:28	—	—	5:26	—	—	5:26	—	—	5:24	—	—	5:24	—	—
	—	—	8:37	—	—	8:37	—	—	8:38	—	—	8:39	—	—	8:42	—	—	8:43

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Heavy rain (total 30mm), heaviest during Fri afternoon. Very mild (max 11°C on Sun afternoon, min 4°C on Fri night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Light rain (total 9mm), mostly falling on Mon night. Very mild (max 16°C on Wed afternoon, min 7°C on Mon 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. 51 minutes ago	10° C	Dry	Calm (0 kph at 6).
Snoqualmie Pass 30 km ESE 824m alt. 56 minutes ago	7° C	-	Calm (0 kph at 252).
Renton 30 km WSW 160m alt. 35 minutes ago	8° C	Dry	Wind obs. (6 kph from 135 degs) was rejected.
Black Diamond 32 km SSW 192m alt. 48 minutes ago		-	Calm (5 kph at 0).
Grotto wx 35 km NE 321m alt. 23 minutes ago	8° C	Dry	Calm (0 kph at 226).
Renton Airport 36 km WSW 218m alt. 2 hours ago	9° C	Dry and cloudy.	Light winds from the S.(Wind varies from 160 to 230 degs) (13 kph at 190).	16 km Low: few Mid: broken High: overcast
Grotto wx 39 km NE 1101m alt. 32 minutes ago	2° C	-	Calm (0 kph at 5).
Auburn 39 km SW 119m alt. 50 minutes ago		-	Calm (0 kph at 212).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	2° C	Light snow.	Light winds from the N (11 kph at 1).	6 km Mid: scattered High: broken
Woodinville 43 km WNW 137.2m alt. 39 minutes ago	9° C	Dry	Wind obs. (14 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.