– Lat/Long: 47.51° N 121.74° W

Mount Si
Weather Forecast, United States
Issued: 4 am Sun 24 May Local Time
Updates in:
hr min s
Update imminent

Issued: 4 am Sun 24 May Local Time

Updates in:

hr min s

Update imminent

2 Mount Si Elevations: 2 Forecast Elevations:

	Days 1–3 Weather Summary Moderate rain (total 10mm), heaviest on Mon afternoon. Very mild (max 18°C on Sun afternoon, min 6°C on Mon night). Wind will be generally light.									Days 4–6 Weather Summary Light rain (total 6mm), mostly falling on Fri afternoon. Warm (max 20°C on Thu afternoon, min 7°C on Thu night). Wind will be generally light.
	Sunday 24			Monday 25			Tuesday 26			Wednesday 27			Thursday 28			Friday 29
	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night	AM	PM	night

	clear	some clouds	some clouds	cloudy	light rain	rain shwrs	light rain	light rain	rain shwrs	some clouds	clear	clear	clear	clear	some clouds	light rain	light rain	light rain
km/h	WSW	WSW	S	WSW	SSW	WSW	W	NNW	N	NW	NW	NE	NW	NW	WSW	SSW	SW	SW
See all weather maps
cm	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
mm	—	—	—	—	4	1.7	4	0.4	0.1	—	—	—	—	—	—	0.4	3	2
max °C	14	18	16	13	12	9	7	9	10	13	18	16	17	20	17	8	9	10
min °C	10	16	12	11	9	6	7	7	8	10	17	11	14	19	7	8	8	7
chill °C	10	16	12	11	8	6	6	7	8	10	17	11	14	19	6	6	6	6

Freezing level m	2950	3100	3100	2200	2000	1650	1600	2050	3400	3600	3850	3750	3600	3700	3600	2700	2150	1650
Cloud base (m)	5900	6050	6850	2650	700	800	400	450	600	700	5450			9500	400	700	500	850

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

Mount Si Weather (Days 0-3):

The weather forecast for Mount Si is: Moderate rain (total 10mm), heaviest on Mon afternoon. Very mild (max 18°C on Sun afternoon, min 6°C on Mon night). Wind will be generally light.

Mount Si Weather (Days 3-6):

Light rain (total 6mm), mostly falling on Fri afternoon. Warm (max 20°C on Thu afternoon, min 7°C on Thu 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. 44 minutes ago	11° C	Dry	Calm (0 kph at 289).
Snoqualmie Pass 30 km ESE 824m alt. 34 minutes ago	7° C	-	Calm (0 kph at 174).
Renton 30 km WSW 160m alt. 1 hour ago	11° C	Dry	Calm (0 kph at 260).
Black Diamond 32 km SSW 192m alt. 1 hour ago		-	Calm (2 kph at 0).
Grotto wx 35 km NE 321m alt. 44 minutes ago	10° C	Dry	Calm (0 kph at 199).
Renton Airport 36 km WSW 218m alt. 1 hour ago	12° C	Dry and cloudy.	Light winds from the S (7 kph at 190).	16 km Low: few Mid: overcast
Grotto wx 39 km NE 1101m alt. 59 minutes ago	7° C	Dry	Calm (0 kph at 342).
Auburn 39 km SW 119m alt. 2 hours ago	11° C	Dry	Calm (0 kph at 183).
Stampede Pass Airport 40 km SE 628m alt. 2 hours ago	6° C	Fog -.	Wind obs. (6 kph from 1 degs) was rejected.	0 km
SHIP4730 43 km W 15m alt. 2 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.