– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 am Sat 23 May Local Time
Updates in:
hr min s
Update imminent

Issued: 10 am Sat 23 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 8mm), mostly falling on Mon night. Very mild (max 18°C on Sun afternoon, min 7°C on Sat night). Wind will be generally light.									Days 4–6 Weather Summary Light rain (total 2mm), mostly falling on Tue morning. Warm (max 21°C on Thu afternoon, min 7°C on Tue morning). Wind will be generally light.
	Saturday 23			Sunday 24			Monday 25			Tuesday 26			Wednesday 27			Thursday 28
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	some clouds	some clouds	some clouds	clear	some clouds	some clouds	some clouds	light rain	mod. rain	light rain	rain shwrs	rain shwrs	some clouds	clear	clear	clear	clear	some clouds
km/h	WSW	W	SW	WSW	SW	S	WSW	W	WSW	WNW	NW	NNE	NW	NW	NE	WNW	NW	NNW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	3	5	1.5	0.4	0.4	—	—	—	—	—	—
max °C	14	17	15	13	18	16	14	12	7	7	11	11	13	18	16	18	21	17
min °C	12	17	7	10	16	12	13	9	7	7	9	8	10	16	12	15	20	11
chill °C	12	17	7	10	16	11	13	8	6	7	9	8	10	16	12	15	20	11

Freezing level m	3250	3200	3000	3100	3200	2950	2250	2000	1550	1600	2000	2800	3700	3750	3800	3650	3750	3600
Cloud base (m)	550	850	1800	9400	5600	5650	2550	800	650	500	600	1700	750			9000	9300	4950

	5:20	—	—	5:20	—	—	5:18	—	—	5:18	—	—	5:16	—	—	5:16	—	—
	—	—	8:45	—	—	8:46	—	—	8:49	—	—	8:50	—	—	8:51	—	—	8:52

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Light rain (total 8mm), mostly falling on Mon night. Very mild (max 18°C on Sun afternoon, min 7°C on Sat night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Light rain (total 2mm), mostly falling on Tue morning. Warm (max 21°C on Thu afternoon, min 7°C on Tue 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. 1 hour ago	20° C	Dry	Calm (2 kph at 231).
Snoqualmie Pass 30 km ESE 824m alt. 1 hour ago	18° C	-	Calm (0 kph at 165).
Renton 30 km WSW 160m alt. 54 minutes ago	12° C	Dry	Calm (3 kph at 238).
Black Diamond 32 km SSW 192m alt. 53 minutes ago		-	Calm (5 kph at 61).
Grotto wx 35 km NE 321m alt. 2 hours ago	12° C	Dry	Light winds from the W (11 kph at 269).
Renton Airport 36 km WSW 218m alt. 2 hours ago	13° C	Dry and cloudy.	Light winds from the SSE (11 kph at 160).	16 km Low: overcast
Grotto wx 39 km NE 1101m alt. 1 hour ago	16° C	Dry	Calm (2 kph at 59).
Auburn 39 km SW 119m alt. 46 minutes ago	27° C	Dry	Calm (0 kph at 212).
Stampede Pass Airport 40 km SE 628m alt. 3 hours ago	11° C	Clear	Wind obs. (7 kph from 1 degs) was rejected.	16 km
SHIP5110 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.