New York, NY 64° Los Angeles, CA 76° Chicago, IL 69° Houston, TX 83° Miami, FL 81° Phoenix, AZ 76° Seattle, WA 56° Denver, CO 69° Toronto, ON 62° Vancouver, BC 54°
WeatherLive › California › Ontario

Ontario, CA Weather

Today Hourly 10-Day Weekend Monthly Radar Air Quality Climate
Current WeatherOntario · 9:52 PM PDT
82° | 66°
73°F
Feels like 70°
Sunny
-4° vs. normal — cooler than usual for this time of year
WindSW 5 mph · Gusts 7 mph
Precip1% · –
Humidity44% · Dew point 50°
UV index7 High
Air Quality49 Good
Pressure29.71 inHg
Visibility6 mi
Sunrise / Sunset6:43 AM · 6:38 PM · 11h 55m

Weather map — Ontario

Full radar →
Now
73°
1%
5 mph
22:00
72°
1%
5 mph
23:00
71°
2%
4 mph
00:00
69°
3%
2 mph
01:00
69°
3%
2 mph
02:00
69°
3%
2 mph
03:00
69°
3%
2 mph
04:00
69°
3%
2 mph
05:00
69°
3%
2 mph
06:00
68°
4%
2 mph
07:00
68°
4%
2 mph
08:00
69°
3%
2 mph
09:00
71°
2%
2 mph
10:00
75°
1%
3 mph
11:00
78°
1%
4 mph
12:00
81°
1%
6 mph
13:00
83°
0%
8 mph
14:00
85°
0%
10 mph
15:00
85°
0%
11 mph
16:00
84°
0%
11 mph
17:00
81°
1%
10 mph
18:00
78°
1%
9 mph
19:00
75°
1%
7 mph
20:00
74°
2%
4 mph

Today · Tue 9/29

High 82°
1% / –

Sunny. Winds SW at 12 mph.

Tonight · Tue 9/29

Low 68°
1% / –

Sunny. Winds SW at 5 mph.

Tomorrow · Wed 9/30

85° | 68°
1% / –

Sunny. Winds SW at 11 mph.

7-day trend

Ontario · temperature + precipitation

10-day forecast

Updated 9:52 PM

Details & indices

Wind
5 mph SW
Gusts 7 mph
Humidity
44%
Dew point 50°
Pressure
29.71 inHg
Falling
UV index
7 — High
High today
Air Quality
Good
AQI 49 · US EPA
Allergy
Very high
Ragweed
Visibility
6 mi
Clear view
Allergy — Ontario

🌿 Conditions right now

View all →
Birch
None
Grass
Low
Oak
None
Alder
None
Hazel
None
Mugwort
Low
Ragweed
High

Sun & moon

Sunrise6:43 AM
Sunset6:38 PM
Length of day11h 55m
Moonrise8:19 PM
Moonset10:03 AM
Moon phase🌖 Waning Gibbous · 85%
Next full moonOct 25 Hunter's Moon
Latitude34.0633°N
Longitude-117.6509°E

Water temps nearby

View all →
Huntington Beach (35 mi)74°
Newport Beach (35 mi)74°
Laguna Beach (37 mi)74°
Venice Beach (47 mi)73°
Santa Monica Beach (48 mi)74°
🌤️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
1991-2020 climate normals — Ontario

Monthly normals

Full climate page →
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max (°F) 65° 66° 67° 75° 78° 86° 93° 94° 91° 83° 74° 66°
Min (°F) 46° 45° 48° 52° 55° 59° 64° 66° 65° 59° 51° 47°
Precip (in) 3.5 3.9 4.6 1.0 0.6 0.0 0.0 0.4 1.1 0.7 2.2 3.7
Warmest: Aug · ⌀ 94°F Coldest: Jan · ⌀ 46°F Wettest: Mar · 4.6 in
Nearby places in California
Los Angeles
Sunny
76°
San Diego
Sunny
72°
San Jose
Sunny
65°
San Francisco
Sunny
61°
Fresno
Sunny
80°
Sacramento
Sunny
73°
NBM + global weather models
Updated: 9:52 PM
Ontario, CA · Elev 1,004 ft · 34.06°N, 117.65°W · California · Forecast computed for these exact coordinates
ZIP codes in Ontario

91758 · 91761 · 91762 · 91764

Powered by NWS/NOAA guidance, multi-model forecasts and official environmental feeds · NOAA/NWS · EPA AirNow · MET Norway · global models
Updated: 9:52 PM