– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 am Mon 22 Jun Local Time
Updates in:
hr min s
Update imminent

Issued: 4 am Mon 22 Jun Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Mostly dry. Warm (max 20°C on Tue afternoon, min 9°C on Wed night). Wind will be generally light.									Days 4–6 Weather Summary Heavy rain (total 28mm), heaviest during Fri night. Very mild (max 11°C on Thu afternoon, min 3°C on Sat morning). Winds increasing (light winds from the SW on Thu night, fresh winds from the SW by Sat morning).
	Monday 22			Tuesday 23			Wednesday 24			Thursday 25			Friday 26			Saturday 27
	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	cloudy	some clouds	some clouds	clear	some clouds	mod. rain	mod. rain	light rain	mod. rain	light rain	light rain	rain shwrs
km/h	E	NNW	SE	SE	NW	W	SSW	WSW	WSW	SSW	WSW	SW	SW	SW	WNW	SW	WSW	W
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	6	5	4	9	1.7	0.4	1.1
max °C	15	18	18	19	20	19	15	15	14	9	11	7	7	7	6	3	5	5
min °C	14	17	17	18	19	15	14	14	9	9	10	6	7	7	4	3	4	4
chill °C	14	17	17	18	19	15	14	13	8	7	8	2	3	3	1	-2	-1	2

Freezing level m	3400	3750	3700	3600	3750	3600	3550	3400	3250	3350	3150	3150	2600	2400	2200	1850	2000	2450
Cloud base (m)	9100	9100				7200	6600	5800		7050	1650	400	400	400	400	400	400	1550

	5:09	—	—	5:09	—	—	5:09	—	—	5:09	—	—	5:11	—	—	5:11	—	—
	—	—	9:07	—	—	9:07	—	—	9:07	—	—	9:07	—	—	9:07	—	—	9:07

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Warm (max 20°C on Tue afternoon, min 9°C on Wed night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Heavy rain (total 28mm), heaviest during Fri night. Very mild (max 11°C on Thu afternoon, min 3°C on Sat morning). Winds increasing (light winds from the SW on Thu night, fresh winds from the SW by Sat 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 10 closest weather stations

Weather Station	Temp.	Weather	Wind	Cloud Visibility Cloud / Visibility
Harman Heights wx 6 km SSW 251m alt. 57 minutes ago	22° C	Dry	Calm (0 kph at 7).
Snoqualmie Pass 30 km ESE 824m alt. 59 minutes ago	23° C	-	Calm (0 kph at 69).
Renton 30 km WSW 160m alt. 1 hour ago	22° C	Dry	Calm (2 kph at 293).
Grotto wx 35 km NE 321m alt. 1 hour ago	20° C	Dry	Calm (3 kph at 257).
Renton Airport 36 km WSW 218m alt. 2 hours ago	19° C	Clear	Light winds from the N (9 kph at 0).	16 km
Grotto wx 39 km NE 1101m alt. 2 hours ago	14° C	Dry	Calm (0 kph at 17).
Auburn 39 km SW 119m alt. 2 hours ago		-	Calm (2 kph at 279).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	17° C	Clear	Calm (0 kph at 0).	16 km
SHIP1050 43 km W 15m alt. 3 hours ago				- km
SHIP1425 43 km W 15m alt. 1 hour 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.