– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 am Tue 09 Jun Local Time
Updates in:
hr min s
Update imminent

Issued: 10 am Tue 09 Jun 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 Tue morning. Later becoming colder with a dusting of snow on Tue night. Very mild (max 11°C on Thu afternoon, min 2°C on Tue night). Winds decreasing (strong winds from the WSW on Tue afternoon, calm by Thu morning).									Days 4–6 Weather Summary Mostly dry. Warm (max 21°C on Sun afternoon, min 9°C on Fri morning). Wind will be generally light.
	Tuesday 9			Wednesday 10			Thursday 11			Friday 12			Saturday 13			Sunday 14
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	rain shwrs	rain shwrs	light snow	rain shwrs	rain shwrs	clear	clear	clear	clear	some clouds	clear	clear	clear	clear	clear	clear	clear	clear
km/h	WSW	WSW	WSW	NW	NNW	N	N	NNW	NNW	NNW	NW	NNW	NE	N	ESE	ESE	NW	SE
See all weather maps
cm	—	—	2	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	20	6	1.6	1.1	0.8	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	4	4	3	3	6	6	8	11	11	10	12	12	15	17	17	19	21	20
min °C	4	4	2	2	4	5	7	10	8	9	11	9	12	16	16	18	21	18
chill °C	-2	-2	-5	-3	1	3	5	9	6	7	10	7	11	16	16	18	21	18

Freezing level m	1950	1900	1550	1700	2800	3350	3150	3250	3450	3500	3500	3450	3700	3850	3950	4050	4250	4400
Cloud base (m)	400	550	400	450	900		8600				8450				8700	9500		9100

	5:09	—	—	5:09	—	—	5:09	—	—	5:09	—	—	5:09	—	—	5:09	—	—
	—	—	9:01	—	—	9:02	—	—	9:02	—	—	9:04	—	—	9:04	—	—	9:05

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Heavy rain (total 30mm), heaviest during Tue morning. Later becoming colder with a dusting of snow on Tue night. Very mild (max 11°C on Thu afternoon, min 2°C on Tue night). Winds decreasing (strong winds from the WSW on Tue afternoon, calm by Thu morning).

Mount Si Weather (Days 3-6):

Mostly dry. Warm (max 21°C on Sun afternoon, min 9°C on Fri morning). 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. 47 minutes ago	12° C	Dry	Calm (0 kph at 342).
Snoqualmie Pass 30 km ESE 824m alt. 1 hour ago	9° C	-	Calm (0 kph at 156).
Renton 30 km WSW 160m alt. 1 hour ago	14° C	Dry	Wind obs. (16 kph from 251 degs) was rejected.
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Wind obs. (6 kph from 266 degs) was rejected.
Grotto wx 35 km NE 321m alt. 1 hour ago	11° C	Dry	Light winds from the WNW (6 kph at 291).
Renton Airport 36 km WSW 218m alt. 2 hours ago	16° C	Light rain .	Light winds from the SW (19 kph at 220).	16 km Low: broken
Grotto wx 39 km NE 1101m alt. 1 hour ago	6° C	Dry	Calm (3 kph at 178).
Auburn 39 km SW 119m alt. 1 hour ago		-	Calm (5 kph at 210).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	4° C	Light rain .	Wind obs. (11 kph from 1 degs) was rejected.	0 km
SHIP7492 43 km W 3m alt. 3 hours ago	17° C

* 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.