– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 pm Sat 18 Apr Local Time
Updates in:
hr min s
Update imminent

Issued: 4 pm Sat 18 Apr Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Mostly dry. Warm (max 20°C on Sun afternoon, min 9°C on Mon night). Wind will be generally light.											Days 5–7 Weather Summary Light rain (total 7mm), mostly falling on Wed morning. Very mild (max 11°C on Tue afternoon, min 5°C on Wed night). Wind will be generally light.
	Sat 18		Sunday 19			Monday 20			Tuesday 21			Wednesday 22			Thursday 23
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	some clouds	clear	some clouds	some clouds	some clouds	some clouds	some clouds	some clouds	cloudy	light rain	light rain	light rain	light rain	light rain	rain shwrs	some clouds	clear
km/h	ESE	ESE	ESE	SE	E	SSE	NW	SSW	WSW	WNW	NW	WSW	WSW	WSW	WNW	NW	ENE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	0.2	2	2	1.5	1.4	0.1	—	—
max °C	16	12	17	20	15	18	19	16	11	11	9	8	8	7	7	11	9
min °C	15	10	12	19	13	15	19	9	10	10	8	7	8	5	6	9	6
chill °C	15	9	11	19	13	15	19	9	10	10	7	6	7	4	6	9	6

Freezing level m	2600	2900	3050	3050	3150	3250	3100	3100	3050	2850	3050	2000	2000	1450	1500	2000	2100
Cloud base (m)	3000	8500	4600	4150	6600	4150	5150	4900	800	600	400	400	400	450	550	750	8200

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

Mount Si Weather (Days 0-3):

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

Mount Si Weather (Days 3-6):

Light rain (total 7mm), mostly falling on Wed morning. Very mild (max 11°C on Tue 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. 2 hours ago	16° C	Dry	Calm (0 kph at 330).
Snoqualmie Pass 30 km ESE 824m alt. 1 hour ago	4° C	-	Calm (0 kph at 47).
Renton 30 km WSW 160m alt. 55 minutes ago	17° C	Dry	Calm (0 kph at 37).
Grotto wx 35 km NE 321m alt. 50 minutes ago	14° C	Dry	Calm (3 kph at 34).
Renton Airport 36 km WSW 218m alt. 3 hours ago	19° C	Dry and partly cloudy.	Light winds from the N (7 kph at 0).	16 km Low: scattered
Grotto wx 39 km NE 1101m alt. 52 minutes ago	3° C	Dry	Calm (0 kph at 335).
Auburn 39 km SW 119m alt. 1 hour ago	11° C	Dry	Calm (0 kph at 290).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	7° C	Clear	Wind obs. (6 kph from 1 degs) was rejected.	16 km
Woodinville 43 km WNW 137.2m alt. 1 hour ago	8° C	Dry	Calm (0 kph at 156).
Seattl / oeing Airport 44 km WSW 218m alt. 3 hours ago	21° C	Dry and partly cloudy.	Calm (0 kph at 0).	16 km Low: broken

* 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.