As of 03:32 PDT

Weather in Lewisville, OR

56°

Lewisville, Sunday, 9 August, 03:32

Partly cloudy. Feels like 55°. High 87°, low 55°.

Pressure30.06 inHg

Wind2.8 mph NW

Humidity72%

Visibility6.2 mi

Dew point47°

See detailed hourly forecast

Monthly outlook for Lewisville, OR: average high 79°, average low 54.4°. That is 1° below the climate normal for August. Precipitation is expected on 4 days (about 0.4 inches), against a normal of 2 days and 0.4 inches. The warmest day looks like 11 August (88.4°), the coolest 10 August (49.9°).

79°/54.4°

Average high / low

−1°

Below normal

4 / 2

Wet days / normal

0.4 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
9 August – 18 August	81.8°	81.9°	-0°
19 August – 28 August	74.2°	79.2°	-2.8°
29 August – 7 September	at normal	77.6°	—

August records over 66 years

105.3°2 August 2017All-time high

43.3°29 August 1965All-time low

Climate normals and records are computed from the nearest reference point — Monmouth (7 mi).

Mon, 1086° / 50°

86 °

Lewisville, Monday, 10 August

Clear. High 86°, low 50°.

Pressure30.06 inHg

Wind5.7 mph NE

Humidity30%

Visibility6.2 mi

Dew point44°

Tue, 1188° / 54°

88 °

Lewisville, Tuesday, 11 August

Clear. High 88°, low 54°.

Pressure30.06 inHg

Wind6 mph NE

Humidity33%

Visibility6.2 mi

Dew point47°

Wed, 1285° / 56°

85 °

Lewisville, Wednesday, 12 August

Clear. High 85°, low 56°.

Pressure29.97 inHg

Wind5.3 mph NE

Humidity36%

Visibility6.2 mi

Dew point49°

Thu, 1387° / 52°

87 °

Lewisville, Thursday, 13 August

Clear. High 87°, low 52°.

Pressure29.83 inHg

Wind7.8 mph W

Humidity27%

Visibility—

Dew point46°

Fri, 1486° / 54°

86 °

Lewisville, Friday, 14 August

Overcast. High 86°, low 54°.

Pressure29.91 inHg

Wind8.6 mph SW

Humidity33%

Visibility—

Dew point51°

Sat, 1586° / 54°

86 °

Lewisville, Saturday, 15 August

Clear. High 86°, low 54°.

Pressure29.94 inHg

Wind9.4 mph SW

Humidity30%

Visibility—

Dew point48°

Sun, 1682° / 53°

82 °

Lewisville, Sunday, 16 August

Overcast. High 82°, low 53°.

Pressure29.97 inHg

Wind10.8 mph W

Humidity32%

Visibility—

Dew point46°

Mon, 1760° / 55°

0.17

60 °

Lewisville, Monday, 17 August

Light rain. High 60°, low 55°.

Pressure30.06 inHg

Wind3.7 mph S

Humidity93%

Visibility—

Dew point57°

Tue, 1871° / 57°

0.06

71 °

Lewisville, Tuesday, 18 August

Light rain. High 71°, low 57°.

Pressure30.00 inHg

Wind3.8 mph W

Humidity77%

Visibility—

Dew point57°

Wed, 1977° / 60°

0.06

77 °

Lewisville, Wednesday, 19 August

Light rain. High 77°, low 60°.

Pressure29.97 inHg

Wind5.4 mph W

Humidity58%

Visibility—

Dew point57°

Thu, 2075° / 57°

75 °

Lewisville, Thursday, 20 August

Overcast. High 75°, low 57°.

Pressure29.97 inHg

Wind9 mph W

Humidity60%

Visibility—

Dew point55°

Fri, 2174° / 53°

74 °

Lewisville, Friday, 21 August

Overcast. High 74°, low 53°.

Pressure29.94 inHg

Wind10.3 mph W

Humidity50%

Visibility—

Dew point52°

Sat, 2275° / 55°

0.11

75 °

Lewisville, Saturday, 22 August

Light rain. High 75°, low 55°.

Pressure30.03 inHg

Wind4.6 mph W

Humidity47%

Visibility—

Dew point51°

Sun, 2379° / 53°

79 °

Lewisville, Sunday, 23 August

Overcast. High 79°, low 53°.

Pressure30.06 inHg

Wind6.2 mph NE

Humidity37%

Visibility—

Dew point47°

Mon, 2465° / 54°

65 °

Lewisville, Monday, 24 August

Overcast. High 65°, low 54°.

Pressure29.91 inHg

Wind7.1 mph W

Humidity84%

Visibility—

Dew point56°

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

Tue, 2580° / 54°

0.05

80 °

Lewisville, Tuesday, 25 August

Climate normal for this date — 60-year average.

Average high80°

Average low54°

Average precipitation0.05 in

Chance of precipitation12%

Record high94° (2025)

Record low47° (1993)

Wed, 2680° / 55°

0.02

80 °

Lewisville, Wednesday, 26 August

Climate normal for this date — 60-year average.

Average high80°

Average low55°

Average precipitation0.02 in

Chance of precipitation12%

Record high96° (2025)

Record low47° (1991)

Thu, 2779° / 55°

0.02

79 °

Lewisville, Thursday, 27 August

Climate normal for this date — 60-year average.

Average high79°

Average low55°

Average precipitation0.02 in

Chance of precipitation13%

Record high98° (2019)

Record low46° (1962)

Fri, 2880° / 55°

0.03

80 °

Lewisville, Friday, 28 August

Climate normal for this date — 60-year average.

Average high80°

Average low55°

Average precipitation0.03 in

Chance of precipitation15%

Record high98° (2017)

Record low47° (1960)

Sat, 2978° / 55°

0.05

78 °

Lewisville, Saturday, 29 August

Climate normal for this date — 60-year average.

Average high78°

Average low55°

Average precipitation0.05 in

Chance of precipitation23%

Record high92° (2022)

Record low43° (1965)

Sun, 3077° / 55°

0.04

77 °

Lewisville, Sunday, 30 August

Climate normal for this date — 60-year average.

Average high77°

Average low55°

Average precipitation0.04 in

Chance of precipitation13%

Record high96° (1987)

Record low46° (1966)

Mon, 3177° / 55°

0.02

77 °

Lewisville, Monday, 31 August

Climate normal for this date — 60-year average.

Average high77°

Average low55°

Average precipitation0.02 in

Chance of precipitation10%

Record high99° (1987)

Record low45° (1964)

Tue, 0178° / 54°

0.04

78 °

Lewisville, Tuesday, 1 September

Climate normal for this date — 60-year average.

Average high78°

Average low54°

Average precipitation0.04 in

Chance of precipitation13%

Record high96° (1988)

Record low42° (1973)

Wed, 0278° / 54°

0.04

78 °

Lewisville, Wednesday, 2 September

Climate normal for this date — 60-year average.

Average high78°

Average low54°

Average precipitation0.04 in

Chance of precipitation12%

Record high100° (1988)

Record low43° (1960)

Thu, 0378° / 54°

0.02

78 °

Lewisville, Thursday, 3 September

Climate normal for this date — 60-year average.

Average high78°

Average low54°

Average precipitation0.02 in

Chance of precipitation10%

Record high96° (2017)

Record low45° (1964)

Fri, 0478° / 54°

0.02

78 °

Lewisville, Friday, 4 September

Climate normal for this date — 60-year average.

Average high78°

Average low54°

Average precipitation0.02 in

Chance of precipitation15%

Record high98° (2017)

Record low45° (1965)

Sat, 0577° / 54°

0.03

77 °

Lewisville, Saturday, 5 September

Climate normal for this date — 60-year average.

Average high77°

Average low54°

Average precipitation0.03 in

Chance of precipitation12%

Record high100° (2024)

Record low43° (1969)

Sun, 0677° / 53°

0.03

77 °

Lewisville, Sunday, 6 September

Climate normal for this date — 60-year average.

Average high77°

Average low53°

Average precipitation0.03 in

Chance of precipitation13%

Record high94° (2024)

Record low43° (1960)

Mon, 0777° / 54°

0.02

77 °

Lewisville, Monday, 7 September

Climate normal for this date — 60-year average.

Average high77°

Average low54°

Average precipitation0.02 in

Chance of precipitation13%

Record high93° (2011)

Record low43° (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 Lewisville, 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 Lewisville, 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.