– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 am Tue 21 Apr Local Time
Updates in:
hr min s
Update imminent

Issued: 4 am Tue 21 Apr Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Heavy rain (total 40mm), heaviest during Wed morning. Very mild (max 11°C on Tue morning, min 4°C on Wed night). Wind will be generally light.									Days 4–6 Weather Summary Light rain (total 8mm), mostly falling on Sun afternoon. Very mild (max 13°C on Fri afternoon, min 6°C on Fri night). Wind will be generally light.
	Tuesday 21			Wednesday 22			Thursday 23			Friday 24			Saturday 25			Sunday 26
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	some clouds	light rain	mod. rain	heavy rain	mod. rain	light rain	light rain	rain shwrs	rain shwrs	clear	clear	rain shwrs	some clouds	light rain	rain shwrs	light rain	risk tstorm	rain shwrs
km/h	WSW	SW	WSW	SW	WSW	SW	WSW	WNW	ENE	NNW	NNW	ESE	W	N	ESE	SSE	WNW	SSE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	0.9	10	19	6	3	1.9	0.2	0.1	—	—	0.1	—	0.2	0.4	0.2	4	3
max °C	11	10	8	6	7	6	5	7	7	11	13	10	13	12	8	10	10	8
min °C	11	9	6	6	6	4	4	7	4	8	13	6	9	11	6	8	10	6
chill °C	11	8	4	3	3	2	3	6	3	8	12	5	9	10	4	7	10	6

Freezing level m	2950	2250	1800	1550	1550	1200	1250	1450	1450	1850	2000	1950	1900	1850	1750	1650	1800	1550
Cloud base (m)	700	600	400	400	400	450	450	550	950		2750			2150	1700	1600	1550	700

	6:07	—	—	6:05	—	—	6:03	—	—	6:01	—	—	6:00	—	—	5:58	—	—
	—	—	8:04	—	—	8:05	—	—	8:07	—	—	8:07	—	—	8:09	—	—	8:10

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Heavy rain (total 40mm), heaviest during Wed morning. Very mild (max 11°C on Tue morning, min 4°C on Wed night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Light rain (total 8mm), mostly falling on Sun afternoon. Very mild (max 13°C on Fri afternoon, min 6°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. 1 hour ago	12° C	Dry	Calm (0 kph at 11).
Squak Mountain 25 km WSW 420m alt. 3 hours ago	10° C	-	Calm (5 kph at 162).
Snoqualmie Pass 30 km ESE 824m alt. 1 hour ago	2° C	-	Calm (0 kph at 10).
Renton 30 km WSW 160m alt. 53 minutes ago	10° C	Dry	Calm (0 kph at 210).
Covington 32 km SSW 166m alt. 3 hours ago	9° C	Dry	Calm (0 kph at 127).
Grotto wx 35 km NE 321m alt. 2 hours ago	9° C	Dry	Calm (2 kph at 102).
Benson Hill wx 35 km SW 144m alt. 3 hours ago	10° C	Dry	Calm (0 kph at 62).
Renton Airport 36 km WSW 218m alt. 2 hours ago	12° C	Clear	Calm (0 kph at 0).	16 km
Woodinville 37 km WNW 137.2m alt. 3 hours ago	11° C	-	Calm (0 kph at 49).
Grotto wx 39 km NE 1101m alt. 2 hours ago	4° C	Dry	Calm (0 kph at 337).

* 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.