As of 12:01 EDT

Weather in Onset, MA

68°

Onset, Thursday, 8 October, 12:01

Clear. Feels like 68°. High 69°, low 54°.

Pressure29.77 inHg

Wind21.9 mph W

Humidity78%

Visibility6.2 mi

Dew point60°

See detailed hourly forecast

Monthly outlook for Onset, MA: average high 64.7°, average low 49.3°. That is 2.4° above the climate normal for October. Precipitation is expected on 3 days (about 0.9 inches), against a normal of 5 days and 2.0 inches. The warmest day looks like 13 October (72.2°), the coolest 18 October (38.9°).

64.7°/49.3°

Average high / low

+2.4°

Above normal

3 / 5

Wet days / normal

0.9 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
8 October – 17 October	65.3°	61.3°	+2.2°
18 October – 27 October	63.8°	58.3°	+3.1°
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, 0969° / 48°

69 °

Onset, Friday, 9 October

Clear. High 69°, low 48°.

Pressure30.06 inHg

Wind11.3 mph W

Humidity48%

Visibility6.2 mi

Dew point45°

Sat, 1063° / 47°

63 °

Onset, Saturday, 10 October

Overcast. High 63°, low 47°.

Pressure30.45 inHg

Wind5.7 mph NW

Humidity46%

Visibility6.2 mi

Dew point40°

Sun, 1162° / 47°

0.04

62 °

Onset, Sunday, 11 October

Light rain. High 62°, low 47°.

Pressure30.42 inHg

Wind8.7 mph S

Humidity58%

Visibility6.2 mi

Dew point48°

Mon, 1268° / 55°

0.29

68 °

Onset, Monday, 12 October

Rain. High 68°, low 55°.

Pressure29.74 inHg

Wind7.7 mph NE

Humidity89%

Visibility6.2 mi

Dew point61°

Tue, 1372° / 54°

72 °

Onset, Tuesday, 13 October

Light rain. High 72°, low 54°.

Pressure29.68 inHg

Wind10.3 mph NW

Humidity75%

Visibility—

Dew point57°

Wed, 1460° / 47°

60 °

Onset, Wednesday, 14 October

Clear. High 60°, low 47°.

Pressure29.94 inHg

Wind11.5 mph NW

Humidity45%

Visibility—

Dew point33°

Thu, 1560° / 44°

60 °

Onset, Thursday, 15 October

Overcast. High 60°, low 44°.

Pressure30.30 inHg

Wind7.4 mph N

Humidity47%

Visibility—

Dew point35°

Fri, 1666° / 50°

66 °

Onset, Friday, 16 October

Overcast. High 66°, low 50°.

Pressure30.21 inHg

Wind20.7 mph SW

Humidity68%

Visibility—

Dew point50°

Sat, 1764° / 43°

0.02

64 °

Onset, Saturday, 17 October

Light rain. High 64°, low 43°.

Pressure30.03 inHg

Wind19.2 mph NW

Humidity45%

Visibility—

Dew point34°

Sun, 1853° / 39°

53 °

Onset, Sunday, 18 October

Clear. High 53°, low 39°.

Pressure30.47 inHg

Wind11.8 mph NW

Humidity37%

Visibility—

Dew point22°

Mon, 1964° / 44°

64 °

Onset, Monday, 19 October

Overcast. High 64°, low 44°.

Pressure30.45 inHg

Wind10.4 mph SW

Humidity42%

Visibility—

Dew point34°

Tue, 2065° / 49°

65 °

Onset, Tuesday, 20 October

Overcast. High 65°, low 49°.

Pressure30.30 inHg

Wind8.3 mph SW

Humidity45%

Visibility—

Dew point37°

Wed, 2166° / 58°

0.02

66 °

Onset, Wednesday, 21 October

Light rain. High 66°, low 58°.

Pressure30.18 inHg

Wind10.9 mph SW

Humidity65%

Visibility—

Dew point52°

Thu, 2266° / 57°

0.51

66 °

Onset, Thursday, 22 October

Rain. High 66°, low 57°.

Pressure30.12 inHg

Wind7.1 mph SW

Humidity82%

Visibility—

Dew point57°

Fri, 2369° / 54°

0.05

69 °

Onset, Friday, 23 October

Light rain. High 69°, low 54°.

Pressure30.03 inHg

Wind16.6 mph S

Humidity71%

Visibility—

Dew point56°

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.