– Lat/Long: 47.51° N 121.74° W

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

Issued: 10 am Sun 31 May 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 3°C on Sun morning). Wind will be generally light.									Days 4–6 Weather Summary Moderate rain (total 13mm), heaviest on Wed afternoon. Very mild (max 11°C on Wed morning, min 1°C on Fri night). Wind will be generally light.
	Sunday 31			Monday 1			Tuesday 2			Wednesday 3			Thursday 4			Friday 5
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	clear	some clouds	some clouds	some clouds	clear	clear	some clouds	light rain	mod. rain	rain shwrs	light rain	rain shwrs	rain shwrs	rain shwrs	rain shwrs	rain shwrs
km/h	NNW	NNW	NNE	NNE	N	SE	SE	WSW	SE	SW	WNW	SW	SW	WSW	SW	SW	SW	SW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	0.6	9	0.4	0.2	0.7	1.3	0.1	0.3	0.5
max °C	4	8	9	12	14	14	15	18	17	11	8	7	5	6	6	2	3	3
min °C	3	7	7	11	14	13	14	18	13	10	8	5	4	5	3	2	3	1
chill °C	-1	5	6	11	14	12	14	18	12	8	6	2	0	2	-1	-2	0	-3

Freezing level m	1950	2750	2850	2900	3200	3050	3050	3250	3300	2950	2600	2300	2500	2600	2400	1650	1700	1450
Cloud base (m)	1850		8550	6950	6750	3200	2900	3250		1900	550	1850	400	650	700	650	850	800

	5:13	—	—	5:13	—	—	5:13	—	—	5:11	—	—	5:11	—	—	5:11	—	—
	—	—	8:54	—	—	8:55	—	—	8:57	—	—	8:57	—	—	8:58	—	—	8:59

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Very mild (max 18°C on Tue afternoon, min 3°C on Sun morning). Wind will be generally light.

Mount Si Weather (Days 3-6):

Moderate rain (total 13mm), heaviest on Wed afternoon. Very mild (max 11°C on Wed morning, min 1°C on Fri night). 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. 27 minutes ago	18° C	Dry	Calm (2 kph at 346).
Snoqualmie Pass 30 km ESE 824m alt. 58 minutes ago	16° C	-	Calm (0 kph at 174).
Renton 30 km WSW 160m alt. 1 hour ago	15° C	Dry	Calm (3 kph at 333).
Black Diamond 32 km SSW 192m alt. 46 minutes ago		-	Calm (3 kph at 0).
Grotto wx 35 km NE 321m alt. 1 hour ago	12° C	Dry	Light winds from the W (14 kph at 265).
Renton Airport 36 km WSW 218m alt. 2 hours ago	13° C	Clear	Light winds from the NW (11 kph at 320).	16 km
Grotto wx 39 km NE 1101m alt. 26 minutes ago	12° C	Dry	Calm (2 kph at 39).
Auburn 39 km SW 119m alt. 35 minutes ago		-	Calm (0 kph at 199).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	6° C	Clear	Light winds from the WSW (9 kph at 240).	16 km
Woodinville 43 km WNW 137.2m alt. 49 minutes ago		Dry

* 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.