– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 am Mon 01 Jun Local Time
Updates in:
hr min s
Update imminent

Issued: 10 am Mon 01 Jun Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Mostly dry. Very mild (max 18°C on Tue afternoon, min 4°C on Wed night). Wind will be generally light.									Days 4–6 Weather Summary Light rain (total 6mm) at first, then becoming colder with a dusting of snow on Fri night. Freeze-thaw conditions (max 8°C on Thu afternoon, min 0°C on Fri night). Winds decreasing (fresh winds from the WSW on Fri night, calm by Sat night).
	Monday 1			Tuesday 2			Wednesday 3			Thursday 4			Friday 5			Saturday 6
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	some clouds	some clouds	some clouds	clear	clear	rain shwrs	light rain	some clouds	rain shwrs	light rain	rain shwrs	clear	some clouds	light rain	snow shwrs	rain shwrs	rain shwrs	rain shwrs
km/h	NNW	N	SE	SE	W	S	WSW	WSW	SW	SSW	WSW	SW	SW	SW	SW	SW	W	WNW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	2	—	—	—
mm	—	—	—	—	—	0.1	0.4	—	0.2	0.4	0.1	—	—	1.2	—	0.6	2	1.3
max °C	12	13	14	16	18	17	9	11	8	4	8	8	4	3	2	3	4	3
min °C	10	13	13	14	18	11	9	8	4	4	6	3	3	2	0	1	4	1
chill °C	10	13	12	14	18	9	8	5	1	1	5	0	-1	-4	-6	-3	2	-2

Freezing level m	2850	3200	3050	3200	3450	3300	2700	2550	3000	3150	3050	2600	2050	1600	1450	1600	1750	1500
Cloud base (m)	7100	6700	3200	7150			2100	2350	600	500	750	400	2350	750	450	800	1550	500

	5:13	—	—	5:13	—	—	5:11	—	—	5:11	—	—	5:11	—	—	5:11	—	—
	—	—	8:55	—	—	8:57	—	—	8:57	—	—	8:58	—	—	8:59	—	—	9:00

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Very mild (max 18°C on Tue afternoon, min 4°C on Wed night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Light rain (total 6mm) at first, then becoming colder with a dusting of snow on Fri night. Freeze-thaw conditions (max 8°C on Thu afternoon, min 0°C on Fri night). Winds decreasing (fresh winds from the WSW on Fri night, calm by Sat night).

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. 39 minutes ago	23° C	Dry	Calm (0 kph at 105).
Snoqualmie Pass 30 km ESE 824m alt. 46 minutes ago	22° C	-	Calm (0 kph at 151).
Renton 30 km WSW 160m alt. 2 hours ago	19° C	Dry	Calm (3 kph at 314).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Wind obs. (8 kph from 360 degs) was rejected.
Grotto wx 35 km NE 321m alt. 55 minutes ago	19° C	Dry	Moderate winds from the W (23 kph at 271).
Renton Airport 36 km WSW 218m alt. 2 hours ago	18° C	Clear	Light winds from the NW (11 kph at 320).	16 km
Grotto wx 39 km NE 1101m alt. 48 minutes ago	18° C	Dry	Calm (3 kph at 97).
Auburn 39 km SW 119m alt. 2 hours ago		-	Calm (3 kph at 204).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	15° C	-	Wind obs. (7 kph from 1 degs) was rejected.	16 km Low: few
SHIP5497 42 km WSW 15m alt. 2 hours ago				- km

* 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.