– Lat/Long: 47.51° N 121.74° W

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

Issued: 10 am Thu 09 Jul 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 21°C on Thu afternoon, min 8°C on Sat night). Wind will be generally light.									Days 4–6 Weather Summary Mostly dry. Warm (max 26°C on Tue afternoon, min 12°C on Sun morning). Wind will be generally light.
	Thursday 9			Friday 10			Saturday 11			Sunday 12			Monday 13			Tuesday 14
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	some clouds	clear	clear	some clouds	rain shwrs	rain shwrs	rain shwrs	rain shwrs	clear	clear	some clouds	clear	clear	clear	some clouds	clear	clear	clear
km/h	NW	NW	NNE	WSW	W	WSW	SW	WSW	SSE	WNW	NW	E	WNW	NW	ESE	W	W	S
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	0.2	0.2	0.2	0.1	—	—	—	—	—	—	—	—	—	—
max °C	18	21	19	17	18	16	12	17	15	15	20	17	21	25	21	23	26	21
min °C	14	20	12	14	18	11	11	15	8	12	19	13	17	24	17	19	25	12
chill °C	14	20	12	14	18	10	10	15	8	12	19	13	17	24	17	19	25	12

Freezing level m	3800	3800	3750	3550	3500	3450	3050	3200	3000	3550	3700	3950	4100	4450	4550	4300	4450	4100
Cloud base (m)	6150			550	900	500	650	950							6950	4800

	5:18	—	—	5:20	—	—	5:20	—	—	5:20	—	—	5:22	—	—	5:22	—	—
	—	—	9:04	—	—	9:02	—	—	9:02	—	—	9:01	—	—	9:00	—	—	9:00

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Warm (max 21°C on Thu afternoon, min 8°C on Sat night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Warm (max 26°C on Tue afternoon, min 12°C on Sun morning). Wind will be generally light.

This table gives the weather forecast for Mount Si at the specific elevation of 500 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	19° C	Dry	Calm (0 kph at 167).
Snoqualmie Pass 30 km ESE 824m alt. 2 hours ago	20° C	-	Calm (0 kph at 172).
Grotto wx 35 km NE 321m alt. 2 hours ago	17° C	Dry	Light winds from the W (14 kph at 271).
Renton Airport 36 km WSW 218m alt. 2 hours ago	17° C	Dry and partly cloudy.	Light winds from the N (9 kph at 350).	16 km Low: scattered
Grotto wx 39 km NE 1101m alt. 2 hours ago	15° C	Dry	Calm (2 kph at 134).
Auburn 39 km SW 119m alt. 3 hours ago		-	Calm (0 kph at 140).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	11° C	Dry and partly cloudy.	Calm (0 kph at 0).	16 km Low: scattered
SHIP1838 43 km W 15m alt. 3 hours ago				- km
SHIP5299 43 km W 15m alt. 3 hours ago				- km
SHIP1194 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.