As of 02:49 PDT

Weather in Helvetia, OR

60°

Helvetia, Sunday, 9 August, 02:49

Partly cloudy. Feels like 59°. High 85°, low 57°.

Pressure30.06 inHg

Wind2 mph N

Humidity68%

Visibility6.2 mi

Dew point49°

See detailed hourly forecast

Monthly outlook for Helvetia, OR: average high 78°, average low 56.6°. That is 1.7° below the climate normal for August. Precipitation is expected on 6 days (about 0.6 inches), against a normal of 2 days and 0.4 inches. The warmest day looks like 14 August (87.7°), the coolest 10 August (51°).

78°/56.6°

Average high / low

−1.7°

Below normal

6 / 2

Wet days / normal

0.6 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
9 August – 18 August	81.8°	82.3°	-0.3°
19 August – 28 August	71.7°	79.6°	-4.4°
29 August – 7 September	at normal	77.9°	—

August records over 66 years

104.7°12 August 2021All-time high

46°18 August 1973All-time low

Climate normals and records are computed from the nearest reference point — Hillsboro (5 mi).

Mon, 1084° / 51°

84 °

Helvetia, Monday, 10 August

Clear. High 84°, low 51°.

Pressure30.06 inHg

Wind3.2 mph N

Humidity36%

Visibility6.2 mi

Dew point48°

Tue, 1185° / 54°

85 °

Helvetia, Tuesday, 11 August

Clear. High 85°, low 54°.

Pressure30.09 inHg

Wind3.8 mph N

Humidity35%

Visibility6.2 mi

Dew point49°

Wed, 1283° / 57°

83 °

Helvetia, Wednesday, 12 August

Clear. High 83°, low 57°.

Pressure30.00 inHg

Wind4.5 mph N

Humidity37%

Visibility6.2 mi

Dew point50°

Thu, 1387° / 54°

87 °

Helvetia, Thursday, 13 August

Clear. High 87°, low 54°.

Pressure29.83 inHg

Wind8.2 mph N

Humidity31%

Visibility—

Dew point48°

Fri, 1488° / 57°

88 °

Helvetia, Friday, 14 August

Overcast. High 88°, low 57°.

Pressure29.91 inHg

Wind8.5 mph NW

Humidity32%

Visibility—

Dew point49°

Sat, 1587° / 58°

87 °

Helvetia, Saturday, 15 August

Clear. High 87°, low 58°.

Pressure29.94 inHg

Wind8.5 mph NW

Humidity34%

Visibility—

Dew point51°

Sun, 1685° / 57°

85 °

Helvetia, Sunday, 16 August

Overcast. High 85°, low 57°.

Pressure29.97 inHg

Wind4.7 mph NW

Humidity32%

Visibility—

Dew point46°

Mon, 1762° / 57°

0.11

62 °

Helvetia, Monday, 17 August

Light rain. High 62°, low 57°.

Pressure30.06 inHg

Wind5.9 mph S

Humidity90%

Visibility—

Dew point56°

Tue, 1873° / 57°

0.05

73 °

Helvetia, Tuesday, 18 August

Light rain. High 73°, low 57°.

Pressure30.00 inHg

Wind2.6 mph W

Humidity69%

Visibility—

Dew point56°

Wed, 1974° / 62°

0.05

74 °

Helvetia, Wednesday, 19 August

Light rain. High 74°, low 62°.

Pressure30.00 inHg

Wind3.3 mph NW

Humidity78%

Visibility—

Dew point61°

Thu, 2074° / 61°

0.06

74 °

Helvetia, Thursday, 20 August

Light rain. High 74°, low 61°.

Pressure29.94 inHg

Wind4.4 mph NW

Humidity75%

Visibility—

Dew point61°

Fri, 2176° / 58°

76 °

Helvetia, Friday, 21 August

Overcast. High 76°, low 58°.

Pressure29.94 inHg

Wind6.4 mph NW

Humidity41%

Visibility—

Dew point49°

Sat, 2271° / 57°

0.28

71 °

Helvetia, Saturday, 22 August

Light rain. High 71°, low 57°.

Pressure30.06 inHg

Wind8.6 mph NW

Humidity61%

Visibility—

Dew point55°

Sun, 2376° / 53°

76 °

Helvetia, Sunday, 23 August

Overcast. High 76°, low 53°.

Pressure30.06 inHg

Wind7.7 mph N

Humidity42%

Visibility—

Dew point47°

Mon, 2459° / 55°

0.08

59 °

Helvetia, Monday, 24 August

Light rain. High 59°, low 55°.

Pressure29.91 inHg

Wind3.3 mph SE

Humidity88%

Visibility—

Dew point55°

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

Tue, 2580° / 56°

0.04

80 °

Helvetia, Tuesday, 25 August

Climate normal for this date — 60-year average.

Average high80°

Average low56°

Average precipitation0.04 in

Chance of precipitation17%

Record high94° (1996)

Record low48° (2024)

Wed, 2681° / 56°

0.02

81 °

Helvetia, Wednesday, 26 August

Climate normal for this date — 60-year average.

Average high81°

Average low56°

Average precipitation0.02 in

Chance of precipitation12%

Record high99° (1986)

Record low48° (1973)

Thu, 2780° / 57°

0.02

80 °

Helvetia, Thursday, 27 August

Climate normal for this date — 60-year average.

Average high80°

Average low57°

Average precipitation0.02 in

Chance of precipitation15%

Record high97° (1972)

Record low49° (1960)

Fri, 2880° / 56°

0.02

80 °

Helvetia, Friday, 28 August

Climate normal for this date — 60-year average.

Average high80°

Average low56°

Average precipitation0.02 in

Chance of precipitation13%

Record high98° (1967)

Record low47° (2024)

Sat, 2979° / 57°

0.06

79 °

Helvetia, Saturday, 29 August

Climate normal for this date — 60-year average.

Average high79°

Average low57°

Average precipitation0.06 in

Chance of precipitation20%

Record high93° (1974)

Record low47° (1965)

Sun, 3077° / 57°

0.04

77 °

Helvetia, Sunday, 30 August

Climate normal for this date — 60-year average.

Average high77°

Average low57°

Average precipitation0.04 in

Chance of precipitation17%

Record high97° (2022)

Record low48° (2020)

Mon, 3177° / 56°

0.03

77 °

Helvetia, 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, 0178° / 55°

0.05

78 °

Helvetia, Tuesday, 1 September

Climate normal for this date — 60-year average.

Average high78°

Average low55°

Average precipitation0.05 in

Chance of precipitation18%

Record high95° (1988)

Record low46° (1973)

Wed, 0279° / 55°

0.03

79 °

Helvetia, Wednesday, 2 September

Climate normal for this date — 60-year average.

Average high79°

Average low55°

Average precipitation0.03 in

Chance of precipitation13%

Record high102° (1988)

Record low44° (1960)

Thu, 0378° / 56°

0.04

78 °

Helvetia, 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 low46° (1964)

Fri, 0479° / 55°

0.03

79 °

Helvetia, Friday, 4 September

Climate normal for this date — 60-year average.

Average high79°

Average low55°

Average precipitation0.03 in

Chance of precipitation17%

Record high101° (2017)

Record low47° (2015)

Sat, 0578° / 55°

0.02

78 °

Helvetia, Saturday, 5 September

Climate normal for this date — 60-year average.

Average high78°

Average low55°

Average precipitation0.02 in

Chance of precipitation12%

Record high99° (2024)

Record low45° (1969)

Sun, 0678° / 55°

0.06

78 °

Helvetia, Sunday, 6 September

Climate normal for this date — 60-year average.

Average high78°

Average low55°

Average precipitation0.06 in

Chance of precipitation15%

Record high96° (2024)

Record low46° (1960)

Mon, 0777° / 55°

0.02

77 °

Helvetia, Monday, 7 September

Climate normal for this date — 60-year average.

Average high77°

Average low55°

Average precipitation0.02 in

Chance of precipitation17%

Record high94° (2011)

Record low45° (1992)

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 Helvetia, 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 Helvetia, 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.