As of 15:33 PDT

Weather in Cornelius, OR

90°

Cornelius, Saturday, 8 August, 15:33

Clear. Feels like 87°. High 91°, low 58°.

Pressure30.00 inHg

Wind3 mph NW

Humidity25%

Visibility6.2 mi

Dew point51°

See detailed hourly forecast

Monthly outlook for Cornelius, OR: average high 86.8°, average low 57.1°. That is 3.3° above the climate normal for August. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 2 days and 0.4 inches. The warmest day looks like 23 August (93.7°), the coolest 10 August (51.3°).

86.8°/57.1°

Average high / low

+3.3°

Above normal

0 / 2

Wet days / normal

0.0 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
8 August – 17 August	86.3°	81.9°	+2.5°
18 August – 27 August	87.7°	79.2°	+4.7°
28 August – 6 September	at normal	77.9°	—

August records over 66 years

104.4°3 August 2017All-time high

45.5°29 August 1965All-time low

Sun, 0984° / 52°

84 °

Cornelius, Sunday, 9 August

Overcast. High 84°, low 52°.

Pressure30.03 inHg

Wind2.5 mph NE

Humidity31%

Visibility6.2 mi

Dew point46°

Mon, 1085° / 51°

85 °

Cornelius, Monday, 10 August

Clear. High 85°, low 51°.

Pressure30.06 inHg

Wind3.2 mph NE

Humidity35%

Visibility6.2 mi

Dew point49°

Tue, 1187° / 55°

87 °

Cornelius, Tuesday, 11 August

Clear. High 87°, low 55°.

Pressure30.09 inHg

Wind2.8 mph NE

Humidity39%

Visibility6.2 mi

Dew point53°

Wed, 1280° / 57°

80 °

Cornelius, Wednesday, 12 August

Overcast. High 80°, low 57°.

Pressure30.06 inHg

Wind3 mph N

Humidity52%

Visibility6.2 mi

Dew point54°

Thu, 1380° / 53°

80 °

Cornelius, Thursday, 13 August

Mostly clear. High 80°, low 53°.

Pressure29.94 inHg

Wind9.2 mph N

Humidity35%

Visibility—

Dew point46°

Fri, 1487° / 53°

87 °

Cornelius, Friday, 14 August

Clear. High 87°, low 53°.

Pressure29.94 inHg

Wind8 mph N

Humidity31%

Visibility—

Dew point46°

Sat, 1587° / 61°

87 °

Cornelius, Saturday, 15 August

Overcast. High 87°, low 61°.

Pressure29.97 inHg

Wind6.6 mph NW

Humidity36%

Visibility—

Dew point52°

Sun, 1690° / 60°

90 °

Cornelius, Sunday, 16 August

Clear. High 90°, low 60°.

Pressure30.00 inHg

Wind7.2 mph NW

Humidity25%

Visibility—

Dew point45°

Mon, 1793° / 58°

93 °

Cornelius, Monday, 17 August

Clear. High 93°, low 58°.

Pressure29.97 inHg

Wind5.4 mph NW

Humidity24%

Visibility—

Dew point45°

Tue, 1886° / 57°

86 °

Cornelius, Tuesday, 18 August

Overcast. High 86°, low 57°.

Pressure30.06 inHg

Wind5.3 mph NW

Humidity28%

Visibility—

Dew point46°

Wed, 1982° / 59°

82 °

Cornelius, Wednesday, 19 August

Overcast. High 82°, low 59°.

Pressure30.03 inHg

Wind5.4 mph N

Humidity35%

Visibility—

Dew point48°

Thu, 2087° / 58°

87 °

Cornelius, Thursday, 20 August

Mostly clear. High 87°, low 58°.

Pressure30.00 inHg

Wind6.6 mph NW

Humidity35%

Visibility—

Dew point51°

Fri, 2188° / 59°

88 °

Cornelius, Friday, 21 August

Clear. High 88°, low 59°.

Pressure30.00 inHg

Wind8.5 mph NW

Humidity33%

Visibility—

Dew point51°

Sat, 2289° / 60°

89 °

Cornelius, Saturday, 22 August

Clear. High 89°, low 60°.

Pressure29.94 inHg

Wind9.4 mph N

Humidity30%

Visibility—

Dew point49°

Sun, 2394° / 62°

94 °

Cornelius, Sunday, 23 August

Clear. High 94°, low 62°.

Pressure29.85 inHg

Wind7.7 mph NW

Humidity24%

Visibility—

Dew point47°

From day 17 onward the outlook is built from 60-year climate statistics

Mon, 2478° / 56°

0.06

78 °

Cornelius, Monday, 24 August

Climate normal for this date — 60-year average.

Average high78°

Average low56°

Average precipitation0.06 in

Chance of precipitation12%

Record high98° (1996)

Record low49° (2024)

Tue, 2579° / 56°

0.04

79 °

Cornelius, Tuesday, 25 August

Climate normal for this date — 60-year average.

Average high79°

Average low56°

Average precipitation0.04 in

Chance of precipitation17%

Record high94° (1996)

Record low47° (2024)

Wed, 2680° / 56°

0.01

80 °

Cornelius, Wednesday, 26 August

Climate normal for this date — 60-year average.

Average high80°

Average low56°

Average precipitation0.01 in

Chance of precipitation10%

Record high98° (1986)

Record low48° (1991)

Thu, 2779° / 57°

0.02

79 °

Cornelius, Thursday, 27 August

Climate normal for this date — 60-year average.

Average high79°

Average low57°

Average precipitation0.02 in

Chance of precipitation13%

Record high96° (1972)

Record low48° (1962)

Fri, 2880° / 56°

0.02

80 °

Cornelius, Friday, 28 August

Climate normal for this date — 60-year average.

Average high80°

Average low56°

Average precipitation0.02 in

Chance of precipitation13%

Record high97° (2017)

Record low47° (2024)

Sat, 2978° / 57°

0.06

78 °

Cornelius, Saturday, 29 August

Climate normal for this date — 60-year average.

Average high78°

Average low57°

Average precipitation0.06 in

Chance of precipitation18%

Record high93° (2022)

Record low46° (1965)

Sun, 3077° / 57°

0.04

77 °

Cornelius, Sunday, 30 August

Climate normal for this date — 60-year average.

Average high77°

Average low57°

Average precipitation0.04 in

Chance of precipitation17%

Record high96° (1987)

Record low48° (1966)

Mon, 3177° / 56°

0.03

77 °

Cornelius, Monday, 31 August

Climate normal for this date — 60-year average.

Average high77°

Average low56°

Average precipitation0.03 in

Chance of precipitation15%

Record high100° (1987)

Record low46° (1964)

Tue, 0177° / 55°

0.05

77 °

Cornelius, Tuesday, 1 September

Climate normal for this date — 60-year average.

Average high77°

Average low55°

Average precipitation0.05 in

Chance of precipitation18%

Record high94° (1988)

Record low44° (1973)

Wed, 0278° / 55°

0.03

78 °

Cornelius, Wednesday, 2 September

Climate normal for this date — 60-year average.

Average high78°

Average low55°

Average precipitation0.03 in

Chance of precipitation13%

Record high101° (1988)

Record low45° (1960)

Thu, 0378° / 56°

0.04

78 °

Cornelius, Thursday, 3 September

Climate normal for this date — 60-year average.

Average high78°

Average low56°

Average precipitation0.04 in

Chance of precipitation18%

Record high97° (2017)

Record low45° (1964)

Fri, 0478° / 55°

0.03

78 °

Cornelius, Friday, 4 September

Climate normal for this date — 60-year average.

Average high78°

Average low55°

Average precipitation0.03 in

Chance of precipitation17%

Record high101° (2017)

Record low47° (2015)

Sat, 0577° / 55°

0.02

77 °

Cornelius, Saturday, 5 September

Climate normal for this date — 60-year average.

Average high77°

Average low55°

Average precipitation0.02 in

Chance of precipitation12%

Record high99° (2024)

Record low44° (1969)

Sun, 0677° / 55°

0.06

77 °

Cornelius, Sunday, 6 September

Climate normal for this date — 60-year average.

Average high77°

Average low55°

Average precipitation0.06 in

Chance of precipitation15%

Record high95° (2024)

Record low45° (1960)

About the monthly outlook

How accurate is a 30-day forecast?

The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Cornelius, OR are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.

What does "above normal" mean?

We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.

Where do the 66-year records come from?

They are real temperature extremes recorded in Cornelius, OR since 1960: the highest and lowest reading for each calendar date, with the year it happened.

How often is it updated?

The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.