New York, NY 83° Los Angeles, CA 87° Chicago, IL 78° Houston, TX 102° 🌤️ Miami, FL 🌤️ Phoenix, AZ Seattle, WA 82° 🌤️ Denver, CO Toronto, ON 77° Vancouver, BC 67°
WeatherLive › Ontario › Mount Dennis

Mount Dennis, ON Weather

Today Hourly 10-Day Weekend Monthly Radar Air Quality Climate
Current WeatherMount Dennis · 4:50 PM EDT
83° | 57°
83°F
Feels like 83°
Sunny
WindSE 9 mph · Gusts 9 mph
Precip5% · –
Humidity43% · Dew point 58°
UV index7 High
Air Quality50 Good
Pressure30.06 inHg
Visibility6 mi
Sunrise / Sunset6:29 AM · 8:12 PM · 13h 43m

Weather map — Mount Dennis

Full radar →
Now
83°
1%
9 mph
17:00
83°
1%
8 mph
18:00
79°
3%
8 mph
19:00
77°
3%
8 mph
20:00
69°
5%
7 mph
21:00
67°
7%
7 mph
22:00
66°
7%
6 mph
23:00
66°
9%
7 mph
00:00
65°
9%
7 mph
01:00
64°
8%
7 mph
02:00
64°
7%
6 mph
03:00
63°
8%
7 mph
04:00
62°
10%
6 mph
05:00
62°
27%
5 mph
06:00
62°
27%
4 mph
07:00
65°
18%
5 mph
08:00
65°
17%
2 mph
09:00
66°
16%
4 mph
10:00
69°
9%
5 mph
11:00
73°
30%
6 mph
12:00
74°
14%
8 mph
13:00
71°
16%
6 mph
14:00
70°
0.02 in
5 mph
15:00
69°
50%
4 mph

Today · Fri 8/21

High 83°
5% / –

Sunny. Winds SE at 9 mph.

Tonight · Fri 8/21

Low 62°
7% / –

Sunny. Winds E at 7 mph.

Tomorrow · Sat 8/22

74° | 62°
76% / 0.17 in

Showers. Winds SE at 8 mph.

7-day trend

Mount Dennis · temperature + precipitation

10-day forecast

Updated 4:50 PM

Details & indices

Wind
9 mph SE
Gusts 9 mph
Humidity
43%
Dew point 58°
Pressure
30.06 inHg
Rising
UV index
7 — High
High today
Air Quality
Good
AQI 50 · US EPA
Allergy
Very high
Mugwort
Visibility
6 mi
Clear view
Allergy — Mount Dennis

🌿 Conditions right now

View all →
Birch
None
Grass
High
Oak
None
Alder
None
Hazel
None
Mugwort
Very high
Ragweed
Moderate

Sun & moon

Sunrise6:29 AM
Sunset8:12 PM
Length of day13h 43m
Moonrise4:24 PM
Moonset—
Moon phase🌓 First Quarter · 66%
Next full moonAug 28 Sturgeon Moon
Latitude43.6869°N
Longitude-79.4892°E

Water temps nearby

View all →
No beaches within 50 miles
🌤️No rain expected in the next 90 minutes
Now+30+60+90 min
Minute-by-minute precip · HRRR nowcast

Daily planner

computed from today's forecast
Laundry day
Great
Line-drying weather
Grilling
Great
Fire up the grill
Running
Fair
Lace up outside
Patio
Great
Dinner outdoors
Nearby places in {{REGION}}
Toronto
Sunny
77°
Ottawa
Sunny
80°
Mississauga
Sunny
78° 🌤️
Brampton
—
— 🌤️
Hamilton
—
—
London
Sunny
84°
Data sources · Friday, August 21
Where the Mount Dennis forecast comes from
This page blends NOAA/NWS model guidance with global ensembles for the 10-day outlook, air quality and alerts. Data refreshes every hour, current conditions every 15 minutes. Coordinates: 43.6869°N, -79.4892°.
NBM + global weather models
Updated: 4:50 PM
Weather in Mount Dennis
Mount Dennis's outlook: warmest day near 84° (Sunday), coldest night about 56° (Tuesday). About 0.73 in of precipitation is expected in total; the most likely wet day is Thursday (83% chance). The NWS alert board for this area is currently clear. Right now Mount Dennis is running about 29° warmer than Rochester. Longer view: four full seasons with serious winter and real summer heat.
Mount Dennis, ON · Elev 407 ft · 43.69°N, 79.49°W · Ontario · Forecast computed for these exact coordinates
Powered by NWS/NOAA guidance, multi-model forecasts and official environmental feeds · NOAA/NWS · EPA AirNow · MET Norway · global models
Updated: 4:50 PM