– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 pm Mon 27 Apr Local Time
Updates in:
hr min s
Update imminent

Issued: 4 pm Mon 27 Apr Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–4 Weather Summary Mostly dry. Freeze-thaw conditions (max 10°C on Thu morning, min 0°C on Mon night). Wind will be generally light.											Days 5–7 Weather Summary Mostly dry. Very mild (max 15°C on Sun morning, min 5°C on Fri night). Wind will be generally light.
	Mon 27		Tuesday 28			Wednesday 29			Thursday 30			Friday 1			Saturday 2
	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	rain shwrs	rain shwrs	cloudy	rain shwrs	rain shwrs	clear	clear	clear	some clouds	some clouds	some clouds	some clouds	rain shwrs	some clouds	some clouds	rain shwrs	rain shwrs
km/h	SW	SW	SW	W	N	E	NNW	SE	SSW	WNW	WNW	WNW	WNW	N	ENE	NNE	ENE
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	0.1	0.3	—	0.1	0.1	—	—	—	—	—	—	—	0.1	—	—	0.1	0.1
max °C	3	2	1	3	3	6	9	9	10	10	9	6	7	7	9	12	12
min °C	3	0	0	2	2	3	8	8	9	10	6	6	6	5	7	11	11
chill °C	0	-3	-4	0	0	3	8	8	9	10	6	5	5	2	6	11	10

Freezing level m	1650	1400	1400	1600	1700	2250	2650	2750	2800	2900	2700	2350	2400	2350	2650	2900	3100
Cloud base (m)	950	600	750	850	750			2650		7100	6300	550	850	2000	2600	2900

	—	—	5:54	—	—	5:52	—	—	5:52	—	—	5:50	—	—	5:48	—	—
	—	8:12	—	—	8:14	—	—	8:15	—	—	8:16	—	—	8:17	—	—	8:19

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Mostly dry. Freeze-thaw conditions (max 10°C on Thu morning, min 0°C on Mon night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Mostly dry. Very mild (max 15°C on Sun morning, min 5°C on Fri 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. 2 hours ago	16° C	Dry	Calm (0 kph at 355).
Snoqualmie Pass 30 km ESE 824m alt. 41 minutes ago	10° C	-	Calm (0 kph at 182).
Renton 30 km WSW 160m alt. 2 hours ago	13° C	Dry	Light winds from the SW (6 kph at 227).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Calm (2 kph at 0).
Grotto wx 35 km NE 321m alt. 1 hour ago	13° C	Dry	Light winds from the WSW (10 kph at 258).
Renton Airport 36 km WSW 218m alt. 2 hours ago	14° C	Dry and cloudy.	Light winds from the WSW (13 kph at 240).	16 km Low: overcast
Grotto wx 39 km NE 1101m alt. 50 minutes ago	6° C	Dry	Calm (0 kph at 57).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	7° C	-	Light winds from the W.(Wind varies from 220 to 310 degs) (13 kph at 270).	16 km Low: few
SHIP8436 43 km W 3m alt. 2 hours ago	14° C
SHIP3672 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.