– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 pm Tue 21 Apr Local Time
Updates in:
hr min s
Update imminent

Issued: 4 pm Tue 21 Apr Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary A light covering of new snow mostly falling on Wed morning. Becoming milder with moderate rain (total 12mm) heaviest on Wed morning. Freeze-thaw conditions (max 5°C on Tue afternoon, min -1°C on Wed night). Winds decreasing (fresh winds from the SW on Wed morning, calm by Fri morning).											Days 5–7 Weather Summary Light rain (total 6mm), mostly falling on Sun night. Mild temperatures (max 7°C on Fri afternoon, min 2°C on Sun night). Wind will be generally light.
	Tue 21		Wednesday 22			Thursday 23			Friday 24			Saturday 25			Sunday 26
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	light rain	light snow	light snow	light snow	cloudy	cloudy	cloudy	some clouds	some clouds	clear	rain shwrs	some clouds	light rain	light rain	cloudy	rain shwrs	rain shwrs
km/h	W	WSW	WSW	SW	SW	WSW	W	N	NE	NW	ESE	ESE	ESE	ESE	SE	NNW	S
See all weather maps
cm	—	3	5	1	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	1.1	5	6	—	—	—	—	—	—	—	1.2	—	0.3	0.4	—	0.5	4
max °C	5	3	2	1	1	0	2	2	4	7	6	6	7	5	5	6	4
min °C	4	2	2	1	-1	-1	2	2	3	6	5	5	6	4	4	5	2
chill °C	0	-2	-4	-4	-7	-6	-1	-1	0	6	5	2	4	0	1	5	0

Freezing level m	2300	1800	1750	1500	1250	1300	1700	1600	1900	2200	1950	1900	1950	1900	1800	1950	1800
Cloud base (m)	650	400	400	400	450	450	450	950	5800	2100	2000	2100	2100	3350	2550	1950	900

	—	—	6:05	—	—	6:03	—	—	6:01	—	—	6:00	—	—	5:58	—	—
	—	8:04	—	—	8:05	—	—	8:07	—	—	8:07	—	—	8:09	—	—	8:10

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: A light covering of new snow mostly falling on Wed morning. Becoming milder with moderate rain (total 12mm) heaviest on Wed morning. Freeze-thaw conditions (max 5°C on Tue afternoon, min -1°C on Wed night). Winds decreasing (fresh winds from the SW on Wed morning, calm by Fri morning).

Mount Si Weather (Days 3-6):

Light rain (total 6mm), mostly falling on Sun night. Mild temperatures (max 7°C on Fri afternoon, min 2°C on Sun night). Wind will be generally light.

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. 1 hour ago	15° C	Dry	Calm (3 kph at 67).
Snoqualmie Pass 30 km ESE 824m alt. 45 minutes ago	9° C	-	Calm (0 kph at 156).
Renton 30 km WSW 160m alt. 2 hours ago	14° C	Dry	Calm (5 kph at 181).
Grotto wx 35 km NE 321m alt. 1 hour ago	13° C	Dry	Light winds from the W (13 kph at 263).
Renton Airport 36 km WSW 218m alt. 2 hours ago	16° C	Dry and cloudy.	Light winds from the SSW (9 kph at 210).	16 km Low: overcast
Grotto wx 39 km NE 1101m alt. 1 hour ago	6° C	Dry	Calm (2 kph at 107).
Auburn 39 km SW 119m alt. 1 hour ago	26° C	Dry	Calm (0 kph at 227).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	6° C	Dry and cloudy.	Wind obs. (6 kph from 1 degs) was rejected.	16 km Low: broken Mid: overcast
Woodinville 43 km WNW 137.2m alt. 1 hour ago	12° C	Dry	Wind obs. (23 kph from 288 degs) was rejected.
Seattl / oeing Airport 44 km WSW 218m alt. 2 hours ago	15° C	Dry and cloudy.	Light winds from the SSW (11 kph at 200).	16 km Low: broken Mid: overcast

* 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.