– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 10 pm Mon 04 May Local Time
Updates in:
hr min s
Update imminent

Issued: 10 pm Mon 04 May Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Mostly dry. Very mild (max 13°C on Mon night, min 5°C on Wed night). Wind will be generally light.										Days 5–7 Weather Summary Mostly dry. Very mild (max 12°C on Sat night, min 2°C on Fri morning). Wind will be generally light.
		Tuesday 5			Wednesday 6			Thursday 7			Friday 8			Saturday 9			Sunday 10
	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	clear	clear	clear	clear	some clouds	some clouds	clear	some clouds	cloudy	cloudy	some clouds	some clouds	clear	clear	some clouds	cloudy	some clouds	some clouds
km/h	N	NW	WNW	WNW	SW	WSW	SW	W	WSW	SW	SW	WSW	NNW	N	NNW	S	WSW	W	N
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
max °C	13	12	13	12	10	10	7	5	9	8	3	5	5	7	11	12	9	10	8
min °C	11	11	12	10	9	10	5	5	8	4	2	5	4	6	10	10	8	10	5
chill °C	10	11	12	9	6	8	4	4	7	0	-2	1	1	4	10	9	6	8	3

Freezing level m	3450	3350	3450	3600	3450	3100	2700	3150	3350	3200	1600	2000	2550	3300	3400	3300	2600	2650	2650
Cloud base (m)						2000	1800		7150	6200	5300	2150	1900	9250	8550	6400	2550	2200	1800

	—	5:43	—	—	5:41	—	—	5:41	—	—	5:39	—	—	5:37	—	—	5:35	—	—
	—	—	—	8:22	—	—	8:24	—	—	8:25	—	—	8:27	—	—	8:29	—	—	8:30

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Very mild (max 13°C on Mon night, min 5°C on Wed night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Very mild (max 12°C on Sat night, min 2°C on Fri morning). 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	17° C	Dry	Calm (3 kph at 181).
Renton 30 km WSW 160m alt. 2 hours ago	13° C	Dry	Calm (5 kph at 215).
Black Diamond 32 km SSW 192m alt. 2 hours ago	14° C	Dry	Calm (2 kph at 0).
Grotto wx 35 km NE 321m alt. 46 minutes ago	14° C	Dry	Calm (0 kph at 91).
Renton Airport 36 km WSW 218m alt. 2 hours ago	15° C	Clear	Light winds from the S (11 kph at 180).	16 km
Grotto wx 39 km NE 1101m alt. 1 hour ago	9° C	Dry	Calm (0 kph at 350).
Auburn 39 km SW 119m alt. 2 hours ago	17° C	Dry	Calm (0 kph at 258).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	11° C	Clear	Wind obs. (7 kph from 210 degs) was rejected.	16 km
SHIP8189 42 km WSW 15m alt. 3 hours ago				- km
SHIP10773 42 km WSW 3m alt. 2 hours ago	15° C

* 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.