New Haven County, South Central Connecticut Planning Region, Connecticut, United States

Last updated: 8:06 PM CDT  ·  Refresh
22°C
Feels like 24°
Overcast
▲ 23°  /  ▼ 19°
Wind
7 mph S
Humidity
97%
Dew Point
21°
Pressure
29.45 inHg
Visibility
3 mi
UV Index
0.0
Cloud Cover
94%
Sunrise
5:36 AM
Sunset
8:19 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: New Haven County is currently overcast at 22°C. Precipitation is likely — peak probability 59% around 4 AM. Atmospheric instability is elevated (CAPE up to 1340 J/kg) — isolated convective development possible. Sunrise: 5:36AM · Sunset: 8:19PM.

Alerts

No active alerts for this location.
70 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
22°
49%
10 PM
22°
51%
11 PM
22°
40%
12 AM
22°
58%
1 AM
22°
57%
2 AM
22°
54%
3 AM
22°
54%
4 AM
22°
58%
5 AM
21°
58%
6 AM
21°
45%
7 AM
22°
34%
8 AM
22°
34%
9 AM
23°
35%
10 AM
24°
35%
11 AM
24°
36%
12 PM
24°
36%
1 PM
24°
28%
2 PM
24°
28%
3 PM
25°
20%
4 PM
26°
21%
5 PM
27°
21%
6 PM
26°
21%
7 PM
24°
19%
8 PM
23°
3%
7-Day Forecast
Tonight
23° 19°
Overcast with a 49% chance of rain.
Wed
27° 18°
Partly Cloudy with a 58% chance of rain.
Thu
26° 14°
Partly Cloudy.
Fri
26° 14°
Partly Cloudy.
Sat
26° 15°
Haze.
Sun
27° 14°
Drizzle, 70% chance.
Mon
27° 18°
Drizzle, 71% chance.
TimeTempConditionsPrecipWindHumidity
Now 22° Overcast 49% 7 mph S 97%
10 PM 22° Overcast 51% 7 mph SSW 96%
11 PM 22° Overcast 40% 8 mph SSW 96%
12 AM 22° Overcast 58% 8 mph SSW 95%
1 AM 22° Overcast 57% 9 mph SSW 95%
2 AM 22° Overcast 54% 9 mph SSW 95%
3 AM 22° Thunderstorm 54% 9 mph SSW 95%
4 AM 22° Rain 58% 8 mph SSW 95%
5 AM 21° Mostly Cloudy 58% 8 mph SW 95%
6 AM 21° Mostly Cloudy 45% 8 mph SW 92%
7 AM 22° Mostly Cloudy 34% 8 mph SW 90%
8 AM 22° Partly Cloudy 34% 9 mph SW 87%
9 AM 23° Drizzle 35% 9 mph SW 83%
10 AM 24° Rain 35% 9 mph SW 79%
11 AM 24° Rain 36% 8 mph SW 75%
12 PM 24° Partly Cloudy 36% 8 mph SW 74%
1 PM 24° Partly Cloudy 28% 8 mph WSW 72%
2 PM 24° Partly Cloudy 28% 9 mph WSW 70%
3 PM 25° Mostly Clear 20% 9 mph WSW 65%
4 PM 26° Mostly Clear 21% 9 mph WSW 60%
5 PM 27° Mostly Clear 21% 9 mph WSW 57%
6 PM 26° Partly Cloudy 21% 8 mph WSW 61%
7 PM 24° Partly Cloudy 19% 8 mph W 65%
8 PM 23° Mostly Cloudy 3% 7 mph WNW 68%
15-Day Forecast
Today
7/21
Overcast
49%
19°
23°
Wed
7/22
Partly Cloudy
58%
18°
27°
Thu
7/23
Partly Cloudy
3%
14°
26°
Fri
7/24
Partly Cloudy
16%
14°
26°
Sat
7/25
Haze
16%
15°
26°
Sun
7/26
Drizzle
70%
14°
27°
Mon
7/27
Drizzle
71%
18°
27°
Tue
7/28
Rain
63%
18°
26°
Wed
7/29
Rain
69%
17°
27°
Thu
7/30
Drizzle
51%
17°
27°
Fri
7/31
Drizzle
60%
18°
28°
Sat
8/1
Drizzle
60%
18°
28°
Sun
8/2
Drizzle
60%
17°
27°
Mon
8/3
Drizzle
60%
18°
27°
Tue
8/4
Drizzle
60%
19°
28°
70
Moderate
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

Air quality is acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
70 AQI 19.2 µg/m³
O3
Ground-level ozone
37 AQI 41 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 70 Moderate 37 70
Thu 38 Good 38 31
Fri 48 Good 31 48
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. PM2.5 (fine particles) is reported in µg/m³ and ozone (O3) in ppb. Forecast source: NWS NAQFC.

1000850700500400300250200150100 -40-30-20-10010203040 0.41247101624 LCLLFCEL0°C Temperature (°C) Pressure (hPa)
Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio
RAP
Valid Tue Jul 21, 23:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 60 70 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE299 J/kg
MLCAPE542 J/kg
MUCAPE796 J/kg
SBCIN-119 J/kg
MLCIN0 J/kg
Lifted Index-1.8
Kinematics
0–6 km Shear36 kt
0–1 km Shear12 kt
Eff. Shear36 kt
0–1 km SRH-25
0–3 km SRH-72
Eff. SRH-72
Storm Motion206° @ 37 kt
0–1 km EHI-0.1
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index36.0
Thermo & Levels
PWAT2.05 in
0–3 km LR4.8 °C/km
700–500 LR5.5 °C/km
Total Totals47.0
LCL990 hPa
LFC731 hPa
EL393 hPa
Freezing Lvl13,668 ft