– Lat/Long: 47.51° N 121.74° W

Mount Si Weather Forecast

Cascade Range · United States

Issued: 10 pm Fri 25 Sep Local Time

Updates in:

hr min s

Update imminent

Issued: 10 pm Fri 25 Sep Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Light rain (total 3mm), mostly falling on Fri night. Very mild (max 15°C on Sun afternoon, min 7°C on Fri night). Wind will be generally light.										Days 5–7 Weather Summary Moderate rain (total 11mm), heaviest on Tue night. Very mild (max 15°C on Thu afternoon, min 9°C on Wed morning). Wind will be generally light.
		Saturday 26			Sunday 27			Monday 28			Tuesday 29			Wednesday 30
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	rain shwrs	rain shwrs	some clouds	some clouds	some clouds	clear	some clouds	clear	clear	some clouds	some clouds	light rain	rain shwrs	some clouds	some clouds	some clouds
Cloud base (m)	750			6850	6500			8600	8900	2650	1900	650	650		6600	7100
km/h	SSW	NW	NNW	ESE	NW	NW	E	NW	W	SSW	SW	SW	N	NW	NW	NE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	3	0.1	—	—	—	—	—	—	—	—	—	1	10	—	—	—
max °C	9	10	13	9	13	15	10	13	15	12	14	13	13	12	14	10
min °C	7	7	13	8	9	15	8	9	15	11	13	12	10	9	14	9
chill °C	5	7	12	7	9	15	8	9	15	11	12	11	9	9	14	9

Freezing level m	1650	1900	2400	2800	2750	2850	2900	2850	3100	3350	3150	3150	2850	3150	3150	3300

	—	6:58	—	—	6:58	—	—	7:01	—	—	7:01	—	—	7:03	—	—
	—	—	6:57	—	—	6:54	—	—	6:52	—	—	6:51	—	—	6:49	—

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Light rain (total 3mm), mostly falling on Fri night. Very mild (max 15°C on Sun afternoon, min 7°C on Fri night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Moderate rain (total 11mm), heaviest on Tue night. Very mild (max 15°C on Thu afternoon, min 9°C on Wed 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
Snoqualmie 10 km W 237m alt. 2 hours ago	9°C	Dry	Calm (0 kph at 185).
Sammamish 24 km W 138m alt. 2 hours ago	10°C	Dry	Calm (3 kph at 284).
Orchard Grove wx 26 km SW 115m alt. 2 hours ago	9°C	-	Calm (0 kph at 0).
Duvall 28 km NW 175.3m alt. 2 hours ago	8°C	Dry	Calm (0 kph at 0).
Duvall 29 km NW 147m alt. 2 hours ago	9°C	Dry	Calm (0 kph at 57).
Maple Valley 29 km SSW 185.6m alt. 2 hours ago	11°C	Dry	Calm (0 kph at 170).
Timberlane wx 29 km SW 126m alt. 2 hours ago	11°C	-	Calm (2 kph at 126).
Renton 30 km WSW 160m alt. 54 minutes ago	9°C	Dry	Calm (2 kph at 94).
Duvall 31 km WNW 128m alt. 2 hours ago	9°C	Dry	Calm (0 kph at 151).
Leisure Estates Mobile Home Park wx 33 km WSW 103m alt. 2 hours ago	11°C	-	Calm (0 kph at 197).

* 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.