– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 pm Thu 09 Jul Local Time
Updates in:
hr min s
Update imminent

Issued: 10 pm Thu 09 Jul Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Mostly dry. Very mild (max 15°C on Fri afternoon, min 6°C on Sat night). Wind will be generally light.										Days 5–7 Weather Summary Mostly dry. Very mild (max 18°C on Tue morning, min 11°C on Wed morning). Wind will be generally light.
		Friday 10			Saturday 11			Sunday 12			Monday 13			Tuesday 14			Wednesday 15
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	some clouds	some clouds	rain shwrs	clear	clear	clear	clear	clear	clear	clear	clear	clear	clear	clear	clear	clear	clear
km/h	N	WSW	W	SSW	SW	WSW	WSW	WNW	WNW	NW	SW	WNW	NNW	SW	W	SW	SW	W	N
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	0.1	—	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	13	11	15	12	7	11	10	8	14	13	16	17	17	18	18	17	12	14	12
min °C	11	11	14	8	7	10	6	7	12	12	14	16	17	17	17	12	11	13	8
chill °C	10	11	14	6	4	8	4	7	12	12	14	16	17	17	17	10	9	12	5

Freezing level m	3700	3600	3600	3350	3200	3450	3150	3450	3850	4050	4150	4300	4300	4150	4150	3900	3500	3650	4000
Cloud base (m)			2150	700	600	1800					6100	5850	6700		5050	6750

	—	5:20	—	—	5:20	—	—	5:20	—	—	5:22	—	—	5:22	—	—	5:24	—	—
	—	—	—	9:02	—	—	9:02	—	—	9:01	—	—	9:00	—	—	9:00	—	—	9:00

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Very mild (max 15°C on Fri afternoon, min 6°C on Sat night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Very mild (max 18°C on Tue morning, min 11°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. 2 hours ago	17° C	Dry	Calm (0 kph at 339).
Snoqualmie Pass 30 km ESE 824m alt. 48 minutes ago	13° C	-	Calm (0 kph at 71).
Renton 30 km WSW 160m alt. 2 hours ago	20° C	Dry	Calm (2 kph at 337).
Grotto wx 35 km NE 321m alt. 2 hours ago	21° C	Dry	Calm (5 kph at 244).
Renton Airport 36 km WSW 218m alt. 2 hours ago	22° C	Clear	Wind obs. (9 kph from 310 degs) was rejected.	16 km
Grotto wx 39 km NE 1101m alt. 1 hour ago	11° C	Dry	Calm (0 kph at 0).
Auburn 39 km SW 119m alt. 51 minutes ago	26° C	Dry	Calm (0 kph at 208).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	12° C	Clear	Wind obs. (7 kph from 1 degs) was rejected.	16 km
SHIP3371 43 km W 3m alt. 2 hours ago
SHIP3407 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.