– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 am Sun 26 Apr Local Time
Updates in:
hr min s
Update imminent

Issued: 10 am Sun 26 Apr Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Mostly dry. Mild temperatures (max 7°C on Sun afternoon, min 1°C on Mon night). Wind will be generally light.									Days 4–6 Weather Summary Mostly dry. Very mild (max 10°C on Thu morning, min 3°C on Wed morning). Wind will be generally light.
	Sunday 26			Monday 27			Tuesday 28			Wednesday 29			Thursday 30			Friday 1
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	some clouds	clear	rain shwrs	some clouds	rain shwrs	cloudy	cloudy	some clouds	some clouds	clear	clear	some clouds	some clouds	some clouds	clear	some clouds	some clouds	some clouds
km/h	NNW	NW	SSW	SW	SW	SW	SW	SW	N	E	NNW	SE	S	WNW	N	N	NNW	ENE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	0.2	—	0.1	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	5	7	6	3	3	2	1	2	2	5	9	9	10	10	9	7	8	8
min °C	5	6	3	2	3	1	1	1	2	3	8	9	9	10	6	5	7	8
chill °C	2	3	0	-1	0	-3	-4	-4	0	1	8	9	9	10	3	2	7	8

Freezing level m	1850	2050	1950	1550	1650	1400	1400	1500	1650	2200	2750	3000	2850	2800	2900	3050	3000	2850
Cloud base (m)	6300	2500	2350	900	900	850	550	500	950	850				5950	1850	600	6900	7050

	5:58	—	—	5:56	—	—	5:54	—	—	5:52	—	—	5:52	—	—	5:50	—	—
	—	—	8:10	—	—	8:12	—	—	8:14	—	—	8:15	—	—	8:16	—	—	8:17

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Mild temperatures (max 7°C on Sun afternoon, min 1°C on Mon night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Very mild (max 10°C on Thu morning, min 3°C on Wed 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. 37 minutes ago	20° C	Dry	Calm (2 kph at 261).
Snoqualmie Pass 30 km ESE 824m alt. 1 hour ago	14° C	-	Calm (0 kph at 90).
Renton 30 km WSW 160m alt. 46 minutes ago	19° C	Dry	Wind obs. (6 kph from 63 degs) was rejected.
Black Diamond 32 km SSW 192m alt. 45 minutes ago		-	Light winds from the N (16 kph at 0).
Grotto wx 35 km NE 321m alt. 35 minutes ago	18° C	Dry	Light winds from the WSW (10 kph at 255).
Renton Airport 36 km WSW 218m alt. 2 hours ago	18° C	Clear	Light winds from the N (11 kph at 350).	16 km
Grotto wx 39 km NE 1101m alt. 49 minutes ago	12° C	Dry	Calm (3 kph at 140).
Auburn 39 km SW 119m alt. 1 hour ago	25° C	Dry	Wind obs. (10 kph from 262 degs) was rejected.
SHIP5950 42 km WSW 15m alt. 2 hours ago			Light winds from the NNE (8 kph at 20).	- km
SHIP3237 42 km WSW 15m alt. 3 hours ago			Calm (2 kph at 60).	- 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.