– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 am Fri 29 May Local Time
Updates in:
hr min s
Update imminent

Issued: 10 am Fri 29 May Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Light rain (total 3mm), mostly falling on Fri morning. Mild temperatures (max 8°C on Sun night, min 1°C on Fri night). Wind will be generally light.									Days 4–6 Weather Summary Moderate rain (total 20mm), heaviest on Wed night. Very mild (max 16°C on Tue afternoon, min 4°C on Wed night). Winds increasing (calm on Tue night, fresh winds from the SW by Wed night).
	Friday 29			Saturday 30			Sunday 31			Monday 1			Tuesday 2			Wednesday 3
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light rain	rain shwrs	some clouds	rain shwrs	rain shwrs	clear	clear	clear	some clouds	cloudy	some clouds	some clouds	cloudy	some clouds	some clouds	cloudy	light rain	heavy rain
km/h	SSW	W	NNW	NW	NNW	N	NNW	NW	NNE	W	NW	SE	SSW	WNW	SSE	WSW	WSW	WSW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	3	0.3	—	0.1	0.1	—	—	—	—	—	—	—	—	—	—	—	5	15
max °C	3	4	4	2	5	5	3	7	8	12	13	13	13	16	15	10	9	4
min °C	2	2	1	1	3	2	3	6	7	10	12	12	12	15	11	9	5	4
chill °C	-3	-3	-2	-2	0	-2	-1	4	7	10	11	12	12	15	11	7	4	0

Freezing level m	2100	2100	1450	1500	2050	1950	1800	2550	2750	2800	3050	3050	2950	3350	3150	2850	2300	1950
Cloud base (m)	450	600	1700	750	950			1850	7050	6250	6050	6050	6050	6350	9250	3000	850	400

	5:16	—	—	5:15	—	—	5:13	—	—	5:13	—	—	5:13	—	—	5:11	—	—
	—	—	8:52	—	—	8:53	—	—	8:54	—	—	8:55	—	—	8:57	—	—	8:57

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Light rain (total 3mm), mostly falling on Fri morning. Mild temperatures (max 8°C on Sun night, min 1°C on Fri night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Moderate rain (total 20mm), heaviest on Wed night. Very mild (max 16°C on Tue afternoon, min 4°C on Wed night). Winds increasing (calm on Tue night, fresh winds from the SW by Wed night).

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. 58 minutes ago	12° C	Dry	Calm (3 kph at 122).
Snoqualmie Pass 30 km ESE 824m alt. 36 minutes ago	9° C	-	Calm (0 kph at 175).
Renton 30 km WSW 160m alt. 1 hour ago	9° C	Dry	Calm (5 kph at 250).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Calm (3 kph at 0).
Grotto wx 35 km NE 321m alt. 1 hour ago	10° C	Dry	Calm (5 kph at 258).
Renton Airport 36 km WSW 218m alt. 2 hours ago	11° C	Mist -.	Light winds from the S (13 kph at 180).	5 km Low: broken Mid: broken High: overcast
Grotto wx 39 km NE 1101m alt. 3 hours ago	7° C	Dry	Calm (0 kph at 16).
Auburn 39 km SW 119m alt. 2 hours ago		-	Calm (0 kph at 346).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	5° C	Light rain .	Wind obs. (6 kph from 1 degs) was rejected.	0 km
Woodinville 43 km WNW 137.2m alt. 39 minutes ago	12° C	Dry	Wind obs. (11 kph from 285 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.