Nantucket, Massachusetts

Last updated: 9:25 AM CDT · Refresh

20°C

Feels like 17°

Clear

▲ 22° / ▼ 18°

Wind

14 mph NW

Humidity

66%

Dew Point

14°

Pressure

30.04 inHg

Visibility

10 mi

UV Index

7.7

Cloud Cover

Sunrise

6:12 AM

Sunset

7:03 PM

Drag to pan · double-click to forecast a point

WeatherAI™ Analysis

WeatherAI Analysis: Nantucket is currently clear at 20°C. Dry conditions are expected through the next 24 hours. Sunrise: 6:12AM · Sunset: 7:03PM.

30 AQI · Good Dominant: O3 Air Quality

Hourly Forecast · Next 24 Hours

Now

20°

11 AM

21°

14%

12 PM

21°

14%

1 PM

21°

14%

2 PM

21°

3 PM

22°

4 PM

22°

5 PM

21°

6 PM

21°

7 PM

20°

8 PM

20°

9 PM

20°

10 PM

20°

11 PM

21°

12 AM

20°

1 AM

20°

2 AM

20°

3 AM

20°

4 AM

20°

5 AM

20°

6 AM

20°

7 AM

20°

8 AM

20°

9 AM

21°

7-Day Forecast

Today

22° 18°

Clear.

Tue

22° 20°

Mostly Clear.

Wed

24° 20°

Partly Cloudy.

Thu

24° 20°

Partly Cloudy with a 60% chance of rain.

Fri

23° 19°

Clear with a 50% chance of rain.

Sat

22° 19°

Clear.

Sun

23° 19°

Clear with a 30% chance of rain.

+ Feels like

TimeTempConditionsPrecipWindHumidity

Now 20° Clear 3% 14 mph NW 66%

11 AM 21° Clear 14% 13 mph NW 62%

12 PM 21° Clear 14% 13 mph NW 60%

1 PM 21° Clear 14% 13 mph NNW 58%

2 PM 21° Clear 3% 11 mph NNW 56%

3 PM 22° Clear 3% 8 mph NNW 54%

4 PM 22° Clear 3% 6 mph NNW 52%

5 PM 21° Clear 3% 4 mph NW 53%

6 PM 21° Clear 3% 4 mph SW 57%

7 PM 20° Clear 3% 8 mph SW 61%

8 PM 20° Clear 3% 10 mph SW 66%

9 PM 20° Clear 3% 11 mph SW 69%

10 PM 20° Clear 3% 11 mph SW 71%

11 PM 21° Clear 3% 10 mph WSW 72%

12 AM 20° Clear 3% 10 mph W 70%

1 AM 20° Mostly Clear 3% 10 mph WNW 69%

2 AM 20° Partly Cloudy 3% 11 mph NW 69%

3 AM 20° Mostly Cloudy 3% 11 mph NW 69%

4 AM 20° Mostly Cloudy 3% 11 mph WNW 70%

5 AM 20° Mostly Cloudy 3% 11 mph WNW 70%

6 AM 20° Mostly Cloudy 3% 11 mph WNW 70%

7 AM 20° Mostly Cloudy 3% 10 mph WNW 70%

8 AM 20° Mostly Cloudy 3% 10 mph WNW 69%

9 AM 21° Partly Cloudy 3% 10 mph WNW 69%

15-Day Forecast

Today

9/7

Clear

14%

18°

22°

Tue

9/8

Mostly Clear

20°

22°

Wed

9/9

Partly Cloudy

20°

24°

Thu

9/10

Partly Cloudy

60%

20°

24°

Fri

9/11

Clear

50%

19°

23°

Sat

9/12

Clear

17%

19°

22°

Sun

9/13

Clear

30%

19°

23°

Mon

9/14

Drizzle

43%

19°

23°

Tue

9/15

Rain

44%

17°

24°

Wed

9/16

Rain

68%

15°

20°

Thu

9/17

Drizzle

64%

15°

20°

Fri

9/18

Drizzle

60%

16°

19°

Sat

9/19

Drizzle

60%

16°

19°

Sun

9/20

Drizzle

60%

17°

19°

Mon

9/21

Clear

60%

17°

19°

Good

U.S. Air Quality Index · Dominant: O3

50 100 150 200

Air quality is satisfactory and poses little or no health risk.

Pollutant Breakdown · Today

PM_2.5

Fine particulate matter

18 AQI 3.2 µg/m³

O₃

Ground-level ozone

Dominant

30 AQI 32 ppb

3-Day Outlook

DayAQICategoryO₃PM2.5

Tue 30 Good 30 18

Wed 28 Good 28 23

Thu 37 Good 37 16

About the Air Quality Index

0–50 Good

51–100 Moderate

101–150 Unhealthy for Sensitive Groups

151–200 Unhealthy

201–300 Very Unhealthy

301–500 Hazardous

The U.S. AQI runs 0–500. The overall value equals the highest individual pollutant sub-index, and the dominant pollutant is the one driving it. PM_2.5 (fine particles) is reported in µg/m³ and ozone (O₃) in ppb. Forecast source: NWS NAQFC.

Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio

RAP

Valid Mon Sep 7, 13:00'Z' · F0 · 130 (13 km CONUS/NA)

Hodograph · kt

0–1 1–3 3–6 6–9 km

Instability

SBCAPE15 J/kg

MLCAPE9 J/kg

MUCAPE15 J/kg

SBCIN-13 J/kg

MLCIN0 J/kg

Lifted Index3.0

Kinematics

0–6 km Shear22 kt

0–1 km Shear8 kt

Eff. Shear—

0–1 km SRH37

0–3 km SRH75

Eff. SRH—

Storm Motion356° @ 31 kt

0–1 km EHI0.0

Composite Parameters

Sig. Tornado0.0

STP (eff)—

Supercell—

K-Index9.5

Thermo & Levels

PWAT0.82 in

0–3 km LR6.4 °C/km

700–500 LR5.3 °C/km

Total Totals32.9

LCL927 hPa

LFC885 hPa

EL781 hPa

Freezing Lvl10,194 ft

Nantucket, Massachusetts

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