– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 am Sat 16 May Local Time
Updates in:
hr min s
Update imminent

Issued: 10 am Sat 16 May Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary A light covering of new snow mostly falling on Sat morning. Freeze-thaw conditions (max 7°C on Mon afternoon, min -1°C on Sat morning). Winds decreasing (fresh winds from the NNW on Sat night, calm by Sun afternoon).									Days 4–6 Weather Summary Light rain (total 2mm), mostly falling on Tue afternoon. Very mild (max 13°C on Thu afternoon, min 3°C on Tue morning). Wind will be generally light.
	Saturday 16			Sunday 17			Monday 18			Tuesday 19			Wednesday 20			Thursday 21
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	snow shwrs	light snow	light snow	some clouds	rain shwrs	some clouds	cloudy	rain shwrs	some clouds	light rain	rain shwrs	rain shwrs	clear	clear	clear	clear	clear	some clouds
km/h	W	NNW	NNW	NNW	NW	NW	NW	NW	WNW	W	WNW	N	NNE	NNW	N	WNW	NW	WNW
See all weather maps
cm	2	2	1	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	0.2	—	—	0.1	—	0.1	1.2	1.1	—	—	—	—	—	—
max °C	0	1	0	1	5	5	4	7	6	4	5	5	5	9	9	10	13	12
min °C	-1	1	-1	0	2	4	4	6	3	3	4	3	4	8	9	10	12	7
chill °C	-7	-2	-7	-4	2	2	2	4	1	0	2	0	1	8	9	9	11	6

Freezing level m	1250	1400	1150	1350	2000	2050	1900	2200	2050	2000	2200	2700	2700	3050	3350	3400	3350	3300
Cloud base (m)	450	850	650	600	750		900	950	1600	450	600	1900	650	9200		8050	8200

	5:28	—	—	5:26	—	—	5:26	—	—	5:24	—	—	5:24	—	—	5:22	—	—
	—	—	8:37	—	—	8:38	—	—	8:39	—	—	8:42	—	—	8:43	—	—	8:44

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A light covering of new snow mostly falling on Sat morning. Freeze-thaw conditions (max 7°C on Mon afternoon, min -1°C on Sat morning). Winds decreasing (fresh winds from the NNW on Sat night, calm by Sun afternoon).

Mount Si Weather (Days 3-6):

Light rain (total 2mm), mostly falling on Tue afternoon. Very mild (max 13°C on Thu afternoon, min 3°C on Tue 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. 1 hour ago	7° C	Dry	Calm (0 kph at 4).
Snoqualmie Pass 30 km ESE 824m alt. 37 minutes ago	6° C	-	Calm (0 kph at 244).
Renton 30 km WSW 160m alt. 2 hours ago	11° C	Dry	Calm (3 kph at 219).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Wind obs. (8 kph from 138 degs) was rejected.
Grotto wx 35 km NE 321m alt. 42 minutes ago	7° C	Dry	Light winds from the W (11 kph at 268).
Renton Airport 36 km WSW 218m alt. 2 hours ago	12° C	Dry and partly cloudy.	Light winds from the SSE (7 kph at 150).	16 km Low: few Mid: scattered
Grotto wx 39 km NE 1101m alt. 1 hour ago	2° C	-	Calm (0 kph at 352).
Auburn 39 km SW 119m alt. 1 hour ago		-	Calm (2 kph at 274).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	0° C	Light snow.	Light winds from the N (6 kph at 1).	0 km
SHIP7541 43 km W 15m alt. 3 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.