10-day forecast for Ontario, OR: 59° to 101°, with precipitation expected on 0 days. The table below breaks each day into morning, afternoon, evening and overnight.
101°
Best day: Monday, August 10
85°
Worst day: Sunday, August 16
Tap any day below to see morning, afternoon, evening and overnight.
Mon, 10101° / 59°0
Morning62°feels 59°
Afternoon90°feels 86°
Evening97°feels 92°
Overnight65°feels 62°
101 °
Ontario, Monday, 10 August
Clear. High 101°, low 59°.
Pressure29.85 inHg
Wind6.3 mph NW
Humidity12%
Visibility6.2 mi
Dew point30°
Tue, 11101° / 64°0
Morning70°feels 67°
Afternoon97°feels 92°
Evening96°feels 91°
Overnight71°feels 68°
101 °
Ontario, Tuesday, 11 August
Clear. High 101°, low 64°.
Pressure29.88 inHg
Wind6.4 mph N
Humidity11%
Visibility6.2 mi
Dew point29°
Wed, 1298° / 70°0
Morning73°feels 71°
Afternoon94°feels 89°
Evening92°feels 88°
Overnight72°feels 70°
98 °
Ontario, Wednesday, 12 August
Overcast. High 98°, low 70°.
Pressure29.80 inHg
Wind1 mph NE
Humidity16%
Visibility6.2 mi
Dew point36°
Thu, 1395° / 69°0
Morning74°feels 73°
Afternoon89°feels 85°
Evening91°feels 88°
Overnight81°feels 79°
95 °
Ontario, Thursday, 13 August
Overcast. High 95°, low 69°.
Pressure29.71 inHg
Wind16.1 mph SW
Humidity20%
Visibility—
Dew point40°
Fri, 1495° / 67°0.04
Morning72°feels 71°
Afternoon86°feels 83°
Evening84°feels 82°
Overnight70°feels 69°
95 °
Ontario, Friday, 14 August
Light rain. High 95°, low 67°.
Pressure29.85 inHg
Wind13.5 mph E
Humidity25%
Visibility—
Dew point44°
Sat, 1598° / 65°0
Morning72°feels 70°
Afternoon90°feels 86°
Evening93°feels 90°
Overnight76°feels 76°
98 °
Ontario, Saturday, 15 August
Clear. High 98°, low 65°.
Pressure29.91 inHg
Wind24.3 mph SW
Humidity25%
Visibility—
Dew point45°
Sun, 1685° / 72°0.02
Morning73°feels 73°
Afternoon77°feels 77°
Evening81°feels 80°
Overnight76°feels 75°
85 °
Ontario, Sunday, 16 August
Light rain. High 85°, low 72°.
Pressure29.94 inHg
Wind14.3 mph SE
Humidity51%
Visibility—
Dew point56°
Mon, 1787° / 64°0.01
Morning69°feels 69°
Afternoon83°feels 82°
Evening85°feels 82°
Overnight76°feels 74°
87 °
Ontario, Monday, 17 August
Light rain. High 87°, low 64°.
Pressure29.91 inHg
Wind10.6 mph NW
Humidity35%
Visibility—
Dew point50°
Tue, 1887° / 60°0
Morning65°feels 64°
Afternoon79°feels 77°
Evening85°feels 82°
Overnight74°feels 73°
87 °
Ontario, Tuesday, 18 August
Overcast. High 87°, low 60°.
Pressure29.94 inHg
Wind8.7 mph NW
Humidity32%
Visibility—
Dew point43°
About this forecast
How reliable is a 10-day forecast?
The first 3–5 days are the most reliable, typically within 2–4°. From day six to ten the models show the trend: the direction of change is right more often than the exact numbers.
What does the time-of-day table show?
Temperature in Ontario, OR around 8am, 2pm, 8pm and 2am each day — handy for planning a walk, a drive or work outdoors.
How is the best day chosen?
We weigh the daytime high against precipitation: a warm, dry day scores highest.