– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 pm Fri 31 May Local Time
Updates in:
hr min s
Update imminent

Issued: 10 pm Fri 31 May Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Heavy rain (total 47mm), heaviest during Sun afternoon. Later becoming colder with a dusting of snow on Mon morning. Very mild (max 11°C on Fri night, min 2°C on Mon morning). Winds increasing (calm on Fri night, near gales from the SW by Sun night).										Days 5–7 Weather Summary Moderate rain (total 14mm), heaviest on Tue morning. Very mild (max 19°C on Thu afternoon, min 2°C on Mon night). Winds decreasing (strong winds from the SW on Mon night, calm by Wed morning).
		Saturday 1			Sunday 2			Monday 3			Tuesday 4			Wednesday 5			Thursday 6
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	some clouds	light rain	light rain	light rain	mod. rain	heavy rain	heavy rain	snow shwrs	light rain	rain shwrs	light rain	light rain	rain shwrs	rain shwrs	clear	some clouds	clear	clear	clear
km/h	WNW	SW	WSW	SW	ESE	SSW	SW	SW	WSW	SW	SW	SW	WSW	NNW	N	ESE	ESE	ENE	SSE
Wave Height Map See all maps
cm	—	—	—	—	—	—	—	3	—	—	—	—	—	—	—	—	—	—	—
mm	—	0.6	0.1	0.7	5	15	16	6	3	3	4	4	3	0.1	—	—	—	—	—
max°C	11	5	6	6	5	6	6	4	3	2	5	6	5	6	11	14	16	19	18
min°C	7	5	6	5	4	6	3	2	3	2	4	5	2	3	9	13	15	19	16
chill°C	6	2	3	2	-1	2	-2	-5	-4	-5	0	-1	-2	2	9	13	14	19	16

Freezing level (m)	2950	2200	2300	2300	2600	2450	1850	1500	1700	1800	2500	2200	2250	3450	3800	4150	4150	4100	4150
Cloud base (m)		800	700	650	450	350	400	400	600	550	450	400	550	9850		7200		9200

	—	5:13	—	—	5:11	—	—	5:11	—	—	5:11	—	—	5:11	—	—	5:09	—	—
	—	—	—	8:57	—	—	8:57	—	—	8:58	—	—	8:59	—	—	9:00	—	—	9:00

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Heavy rain (total 47mm), heaviest during Sun afternoon. Later becoming colder with a dusting of snow on Mon morning. Very mild (max 11°C on Fri night, min 2°C on Mon morning). Winds increasing (calm on Fri night, near gales from the SW by Sun night).

Mount Si Weather (Days 3-6):

Moderate rain (total 14mm), heaviest on Tue morning. Very mild (max 19°C on Thu afternoon, min 2°C on Mon night). Winds decreasing (strong winds from the SW on Mon night, calm by Wed morning).

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 5 closest weather stations

Weather Station	Temp.	Weather	Wind	Cloud Visibility Cloud / Visibility
Harman Heights wx 6 km SSW 251m alt. 2 hours ago	13° C	Dry	Calm (0 kph at 317).
Snoqualmie Pass 30 km ESE 824m alt. 1 hour ago	9° C	-	Calm (0 kph at 355).
Renton Airport 36 km WSW 218m alt. 2 hours ago	16° C	-	Light winds from the NNW (11 kph at 330).	16 km
Auburn 39 km SW 119m alt. 40 minutes ago	21° C	Dry	Calm (0 kph at 201).
Grotto wx 39 km NE 1101m alt. 1 hour ago		Dry	Strong winds from the - (40 kph at —).

* 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.