– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 pm Mon 25 May Local Time
Updates in:
hr min s
Update imminent

Issued: 4 pm Mon 25 May Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Light rain (total 10mm), mostly falling on Mon night. Very mild (max 19°C on Wed afternoon, min 6°C on Mon night). Wind will be generally light.											Days 5–7 Weather Summary Light rain (total 5mm), mostly falling on Fri afternoon. Warm (max 21°C on Thu afternoon, min 6°C on Fri night). Wind will be generally light.
	Mon 25		Tuesday 26			Wednesday 27			Thursday 28			Friday 29			Saturday 30
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light rain	rain shwrs	light rain	light rain	rain shwrs	clear	clear	clear	clear	rain shwrs	rain shwrs	cloudy	light rain	light rain	light rain	some clouds	some clouds
km/h	W	W	NW	NNW	NNE	NW	NW	E	W	WNW	SW	SW	WSW	WSW	WSW	S	WSW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	1.4	5	3	0.5	0.1	—	—	—	—	0.7	0.4	—	2	1.2	0.2	—	—
max °C	12	8	7	8	9	15	19	17	19	21	19	10	9	9	6	9	10
min °C	9	6	6	7	8	12	18	13	16	21	10	10	9	6	6	7	6
chill °C	8	5	6	7	8	12	18	13	16	21	9	9	8	5	6	7	6

Freezing level m	2050	1550	1750	2250	3650	3750	3750	3750	3700	3900	3700	3200	2600	2000	1400	1850	1650
Cloud base (m)	700	800	400	400	700	4900	3450			6050		900	550	450	450	550	950

	—	—	5:18	—	—	5:16	—	—	5:16	—	—	5:16	—	—	5:15	—	—
	—	8:49	—	—	8:50	—	—	8:51	—	—	8:52	—	—	8:52	—	—	8:53

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Light rain (total 10mm), mostly falling on Mon night. Very mild (max 19°C on Wed afternoon, min 6°C on Mon night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Light rain (total 5mm), mostly falling on Fri afternoon. Warm (max 21°C on Thu afternoon, min 6°C on Fri 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. 58 minutes ago	12° C	Dry	Calm (0 kph at 319).
Snoqualmie Pass 30 km ESE 824m alt. 1 hour ago	8° C	-	Calm (0 kph at 234).
Renton 30 km WSW 160m alt. 1 hour ago	11° C	Dry	Calm (0 kph at 103).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Wind obs. (18 kph from 279 degs) was rejected.
Grotto wx 35 km NE 321m alt. 2 hours ago	10° C	Dry	Calm (0 kph at 288).
Renton Airport 36 km WSW 218m alt. 3 hours ago	13° C	Dry and cloudy.	Light winds from the N (7 kph at 1).	16 km Low: broken Mid: overcast
Grotto wx 39 km NE 1101m alt. 1 hour ago	5° C	Dry	Calm (0 kph at 182).
Auburn 39 km SW 119m alt. 2 hours ago	13° C	Dry	Calm (0 kph at 36).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	4° C	Dry and cloudy.	Wind obs. (9 kph from 1 degs) was rejected.	13 km Low: broken Mid: broken High: overcast
Woodinville 43 km WNW 137.2m alt. 1 hour ago	9° C	Dry	Wind obs. (6 kph from 277 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.