As of 01:02 EDT

Weather in Onset, MA

56°

Onset, Thursday, 8 October, 01:02

Clear. Feels like 56°. High 72°, low 52°.

Pressure29.85 inHg

Wind8.1 mph SW

Humidity86%

Visibility6.2 mi

Dew point51°

See detailed hourly forecast

Monthly outlook for Onset, MA: average high 65°, average low 51.2°. That is 2.6° above the climate normal for October. Precipitation is expected on 4 days (about 2.6 inches), against a normal of 5 days and 2.0 inches. The warmest day looks like 17 October (77.8°), the coolest 15 October (40.2°).

65°/51.2°

Average high / low

+2.6°

Above normal

4 / 5

Wet days / normal

2.6 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
8 October – 17 October	66.6°	61.3°	+2.9°
18 October – 27 October	62.5°	58.3°	+2.3°
28 October – 6 November	at normal	55.6°	—

October records over 66 years

79.5°4 October 2023All-time high

31.3°31 October 2020All-time low

Climate normals and records are computed from the nearest reference point — North Falmouth (8 mi).

Fri, 0968° / 46°

68 °

Onset, Friday, 9 October

Clear. High 68°, low 46°.

Pressure30.06 inHg

Wind11 mph W

Humidity48%

Visibility6.2 mi

Dew point45°

Sat, 1063° / 46°

63 °

Onset, Saturday, 10 October

Clear. High 63°, low 46°.

Pressure30.45 inHg

Wind6.5 mph NW

Humidity45%

Visibility6.2 mi

Dew point39°

Sun, 1166° / 48°

66 °

Onset, Sunday, 11 October

Overcast. High 66°, low 48°.

Pressure30.42 inHg

Wind7.9 mph SW

Humidity56%

Visibility6.2 mi

Dew point49°

Mon, 1264° / 57°

1.48

64 °

Onset, Monday, 12 October

Heavy rain. High 64°, low 57°.

Pressure29.85 inHg

Wind9.7 mph E

Humidity98%

Visibility—

Dew point60°

Tue, 1372° / 57°

0.07

72 °

Onset, Tuesday, 13 October

Light rain. High 72°, low 57°.

Pressure29.56 inHg

Wind13.5 mph SW

Humidity75%

Visibility—

Dew point58°

Wed, 1457° / 46°

0.04

57 °

Onset, Wednesday, 14 October

Light rain. High 57°, low 46°.

Pressure29.77 inHg

Wind17.3 mph NW

Humidity53%

Visibility—

Dew point34°

Thu, 1559° / 40°

59 °

Onset, Thursday, 15 October

Partly cloudy. High 59°, low 40°.

Pressure30.24 inHg

Wind6.8 mph S

Humidity38%

Visibility—

Dew point29°

Fri, 1667° / 54°

67 °

Onset, Friday, 16 October

Overcast. High 67°, low 54°.

Pressure30.24 inHg

Wind17.1 mph SW

Humidity66%

Visibility—

Dew point51°

Sat, 1778° / 62°

78 °

Onset, Saturday, 17 October

Clear. High 78°, low 62°.

Pressure30.18 inHg

Wind11.9 mph SW

Humidity60%

Visibility—

Dew point57°

Sun, 1871° / 60°

0.01

71 °

Onset, Sunday, 18 October

Light rain. High 71°, low 60°.

Pressure30.24 inHg

Wind12.2 mph SW

Humidity70%

Visibility—

Dew point59°

Mon, 1965° / 55°

0.88

65 °

Onset, Monday, 19 October

Rain. High 65°, low 55°.

Pressure30.03 inHg

Wind14.8 mph N

Humidity96%

Visibility—

Dew point62°

Tue, 2061° / 54°

0.01

61 °

Onset, Tuesday, 20 October

Light rain. High 61°, low 54°.

Pressure30.06 inHg

Wind12.4 mph N

Humidity62%

Visibility—

Dew point46°

Wed, 2164° / 51°

0.06

64 °

Onset, Wednesday, 21 October

Light rain. High 64°, low 51°.

Pressure29.91 inHg

Wind12.1 mph N

Humidity51%

Visibility—

Dew point41°

Thu, 2255° / 45°

55 °

Onset, Thursday, 22 October

Overcast. High 55°, low 45°.

Pressure30.18 inHg

Wind10.6 mph NW

Humidity63%

Visibility—

Dew point39°

Fri, 2360° / 45°

60 °

Onset, Friday, 23 October

Overcast. High 60°, low 45°.

Pressure30.39 inHg

Wind8.1 mph S

Humidity63%

Visibility—

Dew point42°

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

Sat, 2458° / 48°

0.09

58 °

Onset, Saturday, 24 October

Climate normal for this date — 60-year average.

Average high58°

Average low48°

Average precipitation0.09 in

Chance of precipitation32%

Record high71° (2017)

Record low32° (1969)

Sun, 2558° / 49°

0.17

58 °

Onset, Sunday, 25 October

Climate normal for this date — 60-year average.

Average high58°

Average low49°

Average precipitation0.17 in

Chance of precipitation30%

Record high70° (1963)

Record low38° (2003)

Mon, 2657° / 48°

0.15

57 °

Onset, Monday, 26 October

Climate normal for this date — 60-year average.

Average high57°

Average low48°

Average precipitation0.15 in

Chance of precipitation25%

Record high70° (2023)

Record low33° (2018)

Tue, 2757° / 47°

0.13

57 °

Onset, Tuesday, 27 October

Climate normal for this date — 60-year average.

Average high57°

Average low47°

Average precipitation0.13 in

Chance of precipitation27%

Record high69° (2022)

Record low34° (1962)

Wed, 2857° / 47°

0.14

57 °

Onset, Wednesday, 28 October

Climate normal for this date — 60-year average.

Average high57°

Average low47°

Average precipitation0.14 in

Chance of precipitation35%

Record high71° (2023)

Record low33° (1976)

Thu, 2955° / 46°

0.12

55 °

Onset, Thursday, 29 October

Climate normal for this date — 60-year average.

Average high55°

Average low46°

Average precipitation0.12 in

Chance of precipitation23%

Record high67° (2003)

Record low35° (1965)

Fri, 3055° / 45°

0.16

55 °

Onset, Friday, 30 October

Climate normal for this date — 60-year average.

Average high55°

Average low45°

Average precipitation0.16 in

Chance of precipitation27%

Record high67° (2017)

Record low35° (1966)

Sat, 3155° / 46°

0.09

55 °

Onset, Saturday, 31 October

Climate normal for this date — 60-year average.

Average high55°

Average low46°

Average precipitation0.09 in

Chance of precipitation22%

Record high68° (2019)

Record low31° (2020)

Sun, 0157° / 47°

0.1

57 °

Onset, Sunday, 1 November

Climate normal for this date — 60-year average.

Average high57°

Average low47°

Average precipitation0.1 in

Chance of precipitation30%

Record high69° (1971)

Record low36° (1975)

Mon, 0256° / 46°

0.13

56 °

Onset, Monday, 2 November

Climate normal for this date — 60-year average.

Average high56°

Average low46°

Average precipitation0.13 in

Chance of precipitation27%

Record high67° (2017)

Record low31° (2023)

Tue, 0356° / 45°

0.21

56 °

Onset, Tuesday, 3 November

Climate normal for this date — 60-year average.

Average high56°

Average low45°

Average precipitation0.21 in

Chance of precipitation32%

Record high69° (1990)

Record low33° (1965)

Wed, 0455° / 45°

0.04

55 °

Onset, Wednesday, 4 November

Climate normal for this date — 60-year average.

Average high55°

Average low45°

Average precipitation0.04 in

Chance of precipitation18%

Record high68° (1975)

Record low34° (2002)

Thu, 0555° / 46°

0.15

55 °

Onset, Thursday, 5 November

Climate normal for this date — 60-year average.

Average high55°

Average low46°

Average precipitation0.15 in

Chance of precipitation38%

Record high68° (2022)

Record low34° (1965)

Fri, 0654° / 45°

0.14

54 °

Onset, Friday, 6 November

Climate normal for this date — 60-year average.

Average high54°

Average low45°

Average precipitation0.14 in

Chance of precipitation30%

Record high70° (2022)

Record low35° (2012)

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 Onset, MA 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 Onset, MA 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.