Weather Forecast for Plymouth (US)

Massachusetts, United States of America

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Moderate rain at times

Current Weather - Plymouth (US): 25°C

Massachusetts, United States of America

Moderate rain at times

Feels like 26°C

Wind

15 km/h SW

Humidity

71%

Pressure

1010 mb

UV Index

2

Visibility

8 km

Moderate rain

Moderate rain

Wednesday, May 20, 2026

High

31°C

Low

18°C

Rain Chance

89%

Hourly Forecast

Clear 18°C
23:00
May 21

Day Statistics

Maximum Wind

25 km/h

Humidity

68%

Precipitation

8 mm

UV Index

9

Visibility

10 km

Rain Chance

89%

Snow Chance

0%

Sun & Moon

Sunrise

05:18 AM

Sunset

08:02 PM

Moonrise

08:47 AM

Moonset

No moonset

Moon Phase

Waxing Crescent

Moon Illumination

15%

Air Quality

PM2.5

10.1

μg/m³

PM10

12.3

μg/m³

NO₂

6.2

μg/m³

O₃

103

μg/m³

SO₂

1.8

μg/m³

CO

150.7

μg/m³

US EPA Index: 1 GB DEFRA Index: 1

Solar Radiation Data

Shortwave Radiation

451.5

Diffuse Radiation

73.75

DNI

0

GTI

75.87

Weather Alerts

Heat Advisory issued May 20 at 1:29AM EDT until May 20 at 8:00PM EDT by NWS Boston/Norton MA

Hartford; Tolland; Windham; Eastern Franklin; Northern Worcester; Central Middlesex County; Western Essex; Eastern Essex; Eastern Hampshire; Eastern Hampden; Southern Worcester; Western Norfolk; Southeast Middlesex; Suffolk; Eastern Norfolk; Northern Bristol; Western Plymouth; Eastern Plymouth; Northwest Middlesex County; Northwest Providence; Southeast Providence; Western Kent; Eastern Kent May 20, 01:29 AM - May 20, 08:00 PM
Severity: Moderate Urgency: Expected

* WHAT...Heat index values up to 96. * WHERE...Much of Southern New England, except for the eastern slopes of the Berkshires, the Rhode Island and Massachusetts South Coast, Cape Cod and the Islands. * WHEN...Until 8 PM EDT this evening. * IMPACTS...Hot temperatures and moderate humidity may cause heat illnesses.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.

Event: Heat Advisory Certainty: Likely Category: Met

Heat Advisory issued May 20 at 9:33AM EDT until May 20 at 8:00PM EDT by NWS Boston/Norton MA

Hartford; Tolland; Windham; Central Middlesex County; Western Essex; Eastern Essex; Eastern Hampshire; Eastern Hampden; Southern Worcester; Western Norfolk; Southeast Middlesex; Suffolk; Eastern Norfolk; Northern Bristol; Western Plymouth; Eastern Plymouth; Northwest Providence; Southeast Providence; Western Kent; Eastern Kent May 20, 09:33 AM - May 20, 08:00 PM
Severity: Moderate Urgency: Expected

* WHAT...Heat index values up to 96. * WHERE...Portions of northern Connecticut, central, eastern, northeastern, southeastern, and western Massachusetts, and northern Rhode Island. * WHEN...Until 8 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.

Event: Heat Advisory Certainty: Likely Category: Met