– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 am Sun 19 Apr Local Time
Updates in:
hr min s
Update imminent

Issued: 10 am Sun 19 Apr Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Moderate rain (total 18mm), heaviest on Tue night. Warm (max 20°C on Sun afternoon, min 5°C on Tue night). Wind will be generally light.									Days 4–6 Weather Summary Moderate rain (total 15mm), heaviest on Wed morning. Very mild (max 15°C on Fri afternoon, min 5°C on Wed night). Wind will be generally light.
	Sunday 19			Monday 20			Tuesday 21			Wednesday 22			Thursday 23			Friday 24
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	cloudy	some clouds	some clouds	some clouds	cloudy	rain shwrs	some clouds	light rain	heavy rain	mod. rain	mod. rain	rain shwrs	rain shwrs	clear	clear	clear	cloudy	some clouds
km/h	ESE	SE	E	ESE	W	S	WSW	WSW	SW	WSW	WSW	W	NNW	NW	ENE	NW	NW	E
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	0.1	—	0.8	17	8	5	1.8	0.1	—	—	—	—	—
max °C	17	20	16	19	20	15	11	9	8	6	6	6	8	13	10	13	15	12
min °C	13	19	12	15	18	10	10	9	5	6	6	5	6	11	7	10	14	9
chill °C	12	19	12	15	18	10	10	8	2	4	3	5	6	11	7	10	14	9

Freezing level m	3000	3050	3150	3250	3000	3050	2650	2400	1650	1600	1550	1450	1450	2500	2750	2750	2700	2550
Cloud base (m)	5100	4350	6550	4300	3450	6100	700	550	400	400	400	450	700			6750	5450	5500

	6:11	—	—	6:09	—	—	6:07	—	—	6:05	—	—	6:03	—	—	6:01	—	—
	—	—	8:00	—	—	8:02	—	—	8:04	—	—	8:05	—	—	8:07	—	—	8:07

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Moderate rain (total 18mm), heaviest on Tue night. Warm (max 20°C on Sun afternoon, min 5°C on Tue night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Moderate rain (total 15mm), heaviest on Wed morning. Very mild (max 15°C on Fri afternoon, min 5°C on Wed night). 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. 51 minutes ago	23° C	Dry	Calm (0 kph at 296).
Snoqualmie Pass 30 km ESE 824m alt. 52 minutes ago	18° C	-	Calm (0 kph at 8).
Renton 30 km WSW 160m alt. 41 minutes ago	25° C	Dry	Wind obs. (8 kph from 275 degs) was rejected.
Grotto wx 35 km NE 321m alt. 1 hour ago	25° C	Dry	Calm (5 kph at 167).
Renton Airport 36 km WSW 218m alt. 2 hours ago	22° C	Clear	Light winds from the NW (19 kph at 320).	16 km
Grotto wx 39 km NE 1101m alt. 56 minutes ago	13° C	Dry	Calm (2 kph at 310).
Auburn 39 km SW 119m alt. 1 hour ago	25° C	Dry	Calm (3 kph at 193).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	11° C	-	Calm (0 kph at 0).	16 km Low: few
SHIP5719 43 km W 3m alt. 3 hours ago	17° C
Woodinville 43 km WNW 137.2m alt. 1 hour ago	18° C	Dry	Wind obs. (6 kph from 119 degs) was rejected.

* 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.