Weather Forecast for New Haven

Connecticut, United States of America

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Sunny

Current Weather - New Haven: 23°C

Connecticut, United States of America

Sunny

Feels like 25°C

Wind

5 km/h NW

Humidity

66%

Pressure

1013 mb

UV Index

1

Visibility

11 km

Sunny

Sunny

Thursday, July 16, 2026

High

35°C

Low

21°C

Rain Chance

2%

Hourly Forecast

Sunny 34°C
15:00
Sunny 34°C
16:00
Sunny 33°C
17:00
Sunny 32°C
18:00
Sunny 29°C
19:00
Sunny 26°C
20:00
Clear 24°C
21:00
Clear 23°C
22:00
Clear 22°C
23:00
Jul 17

Day Statistics

Maximum Wind

21 km/h

Humidity

50%

Precipitation

0 mm

UV Index

5

Visibility

10 km

Rain Chance

2%

Snow Chance

0%

Sun & Moon

Sunrise

05:32 AM

Sunset

08:23 PM

Moonrise

07:47 AM

Moonset

09:57 PM

Moon Phase

Waxing Crescent

Moon Illumination

8%

Air Quality

PM2.5

19.3

μg/m³

PM10

19.8

μg/m³

NO₂

4.2

μg/m³

O₃

100.5

μg/m³

SO₂

0.9

μg/m³

CO

158.7

μg/m³

US EPA Index: 2 GB DEFRA Index: 2

Solar Radiation Data

Shortwave Radiation

382.26

Diffuse Radiation

174.82

DNI

0

GTI

0

Weather Alerts

Air Quality Alert issued July 15 at 4:34PM EDT by NWS Boston/Norton MA

Hartford; Tolland; Windham Jul 15, 04:34 PM - Jul 16, 12:00 PM
Severity: Unknown Urgency: Unknown

The Connecticut Department of Environmental Protection has issued an Air Quality Alert Day for Fine Particulates, until noon EDT Thursday. An Air Quality Alert day means that Fine Particulates concentrations within the region may approach or exceed unhealthy standards. For additional information, please visit the Connecticut Department of Energy and Environmental Protection website at: https://portal.ct.gov/deep

Event: Air Quality Alert Certainty: Unknown Category: Met

Air Quality Alert issued July 15 at 5:58PM EDT by NWS Albany NY

Northern Litchfield; Southern Litchfield Jul 15, 05:58 PM - Jul 16, 12:00 PM
Severity: Unknown Urgency: Unknown

The Connecticut Department of Environmental Protection has extended the Air Quality Action Day for Fine Particulates, now in effect until noon EDT Thursday. An Air Quality Action Day means that Fine Particulates concentrations within the region may approach or exceed unhealthy standards. For additional information, please visit the Connecticut Air Quality Web site at http://www.ct.gov/deep/aqi

Event: Air Quality Alert Certainty: Unknown Category: Met

When to visit New Haven?

Plan your perfect trip with our month-by-month weather guide

⭐ Best months: June July August

January

☀️
3°C
💧
16 Days of rain
❄️
Very heavy snowfall
🥶 Coldest month

February

☀️
4°C
💧
15 Days of rain
❄️
Very heavy snowfall

March

☀️
7°C
💧
19 Days of rain
❄️
Very heavy snowfall

April

☀️
12°C
💧
17 Days of rain
❄️
Moderate snowfall

May

☀️
18°C
💧
15 Days of rain
❄️
No snowfall

June

☀️
23°C
💧
15 Days of rain
❄️
No snowfall
Best time to visit

July

☀️
27°C
💧
12 Days of rain
❄️
No snowfall
Best time to visit
🔥 Hottest month
🌵 Driest month

August

☀️
27°C
💧
15 Days of rain
❄️
No snowfall
Best time to visit

September

☀️
23°C
💧
16 Days of rain
❄️
No snowfall

October

☀️
18°C
💧
19 Days of rain
❄️
Light snow possible

November

☀️
12°C
💧
16 Days of rain
❄️
Moderate snowfall

December

☀️
6°C
💧
20 Days of rain
❄️
Very heavy snowfall
🌧 Wettest month,