Greenwich, Connecticut

Last updated: 6:02 AM CDT  ·  Refresh
7°C
Feels like 6°
Mostly Clear
▲ 19°  /  ▼ 4°
Wind
5 mph WSW
Humidity
77%
Dew Point
4°
Pressure
30.32 inHg
Visibility
10 mi
UV Index
0.9
Cloud Cover
18%
Sunrise
6:26 AM
Sunset
4:48 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Greenwich is currently mostly clear at 7°C. Dry conditions are expected through the next 24 hours. Sunrise: 6:26AM · Sunset: 4:48PM.

Alerts

No active alerts for this location.
54 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
7°
0%
8 AM
8°
0%
9 AM
11°
0%
10 AM
13°
1%
11 AM
14°
1%
12 PM
18°
1%
1 PM
18°
1%
2 PM
19°
1%
3 PM
18°
2%
4 PM
19°
2%
5 PM
18°
2%
6 PM
16°
2%
7 PM
16°
2%
8 PM
14°
2%
9 PM
13°
2%
10 PM
13°
2%
11 PM
13°
2%
12 AM
12°
2%
1 AM
12°
2%
2 AM
11°
2%
3 AM
11°
1%
4 AM
9°
1%
5 AM
9°
2%
6 AM
9°
2%
7-Day Forecast
Today
19° 4°
Partly Cloudy.
Tue
21° 9°
Partly Cloudy.
Wed
23° 12°
Mostly Clear.
Thu
21° 14°
Overcast with a 53% chance of rain.
Fri
21° 14°
Overcast with a 60% chance of rain.
Sat
19° 11°
Partly Cloudy with a 41% chance of rain.
Sun
17° 9°
Partly Cloudy.
TimeTempConditionsPrecipWindHumidity
Now 7° Mostly Clear 0% 5 mph WSW 77%
8 AM 8° Partly Cloudy 0% 4 mph WSW 72%
9 AM 11° Mostly Cloudy 0% 6 mph SW 61%
10 AM 13° Mostly Cloudy 1% 7 mph SW 54%
11 AM 14° Mostly Cloudy 1% 8 mph SW 50%
12 PM 18° Mostly Cloudy 1% 9 mph SW 48%
1 PM 18° Mostly Cloudy 1% 9 mph SSW 45%
2 PM 19° Partly Cloudy 1% 10 mph SSW 44%
3 PM 18° Clear 2% 9 mph SSW 45%
4 PM 19° Clear 2% 8 mph SSW 48%
5 PM 18° Mostly Clear 2% 7 mph SSW 54%
6 PM 16° Mostly Clear 2% 7 mph SSW 61%
7 PM 16° Partly Cloudy 2% 6 mph SSW 64%
8 PM 14° Partly Cloudy 2% 6 mph SW 66%
9 PM 13° Partly Cloudy 2% 6 mph SW 68%
10 PM 13° Partly Cloudy 2% 6 mph SW 69%
11 PM 13° Partly Cloudy 2% 6 mph SW 70%
12 AM 12° Partly Cloudy 2% 6 mph SW 72%
1 AM 12° Partly Cloudy 2% 6 mph SW 74%
2 AM 11° Partly Cloudy 2% 6 mph SW 76%
3 AM 11° Partly Cloudy 1% 6 mph SW 76%
4 AM 9° Partly Cloudy 1% 6 mph WSW 78%
5 AM 9° Partly Cloudy 2% 5 mph SW 79%
6 AM 9° Partly Cloudy 2% 5 mph SW 82%
15-Day Forecast
Today
11/2
Partly Cloudy
2%
4°
19°
Tue
11/3
Partly Cloudy
4%
9°
21°
Wed
11/4
Mostly Clear
1%
12°
23°
Thu
11/5
Overcast
53%
14°
21°
Fri
11/6
Overcast
60%
14°
21°
Sat
11/7
Partly Cloudy
41%
11°
19°
Sun
11/8
Partly Cloudy
10%
9°
17°
Mon
11/9
Partly Cloudy
32%
8°
16°
Tue
11/10
Partly Cloudy
29%
7°
14°
Wed
11/11
Mostly Clear
15%
7°
15°
Thu
11/12
Partly Cloudy
7%
6°
15°
Fri
11/13
Mostly Clear
54%
6°
12°
Sat
11/14
Drizzle
68%
6°
12°
Sun
11/15
Drizzle
79%
7°
13°
Mon
11/16
Drizzle
79%
8°
14°
54
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
54 AQI 10.9 µg/m³
O3
Ground-level ozone
20 AQI 23 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Tue 54 Moderate 20 54
Wed 44 Good 24 44
Thu 27 Good 27 20
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 LCL0°C Temperature (°C) Pressure (hPa)
Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio
RAP
Valid Mon Nov 2, 10:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE0 J/kg
MLCAPE27 J/kg
MUCAPE0 J/kg
SBCIN—
MLCIN0 J/kg
Lifted Index19.1
Kinematics
0–6 km Shear25 kt
0–1 km Shear10 kt
Eff. Shear—
0–1 km SRH44
0–3 km SRH55
Eff. SRH—
Storm Motion326° @ 19 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index11.9
Thermo & Levels
PWAT0.66 in
0–3 km LR2.0 °C/km
700–500 LR6.3 °C/km
Total Totals35.8
LCL983 hPa
LFC—
EL—
Freezing Lvl10,377 ft