Heat Advisory — Hartford, CT, Tolland, CT, Windham, CT, Eastern Franklin, MA, Northern Worcester, MA, Central Middlesex County, MA, Western Essex, MA, Eastern Essex, MA, Eastern Hampshire, MA, Eastern Hampden, MA, Southern Worcester, MA, Western Norfolk, MA, Southeast Middlesex, MA, Suffolk, MA, Eastern Norfolk, MA, Northern Bristol, MA, Western Plymouth, MA, Eastern Plymouth, MA, Southern Bristol, MA, Southern Plymouth, MA, Northwest Middlesex County, MA, Northwest Providence, RI, Southeast Providence, RI, Western Kent, RI, Eastern Kent, RI, Bristol, RI, Washington, RI, Newport, RI 7:00 PM

Cambridge, Massachusetts

Last updated: 2:46 AM CDT  ·  Refresh
24°C
Feels like 28°
Mostly Clear
▲ 34°  /  ▼ 23°
Wind
4 mph SW
Humidity
94%
Dew Point
23°
Pressure
29.99 inHg
Visibility
9 mi
UV Index
0.0
Cloud Cover
17%
Sunrise
5:43 AM
Sunset
7:56 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Cambridge is currently mostly clear at 24°C. Precipitation is likely — peak probability 58% around 12 AM. Atmospheric instability is elevated (CAPE up to 1287 J/kg) — isolated convective development possible. Sunrise: 5:43AM · Sunset: 7:56PM.

Alerts

Heat Advisory
Hartford, CT, Tolland, CT, Windham, CT, Eastern Franklin, MA, Northern Worcester, MA, Central Middlesex County, MA, Western Essex, MA, Eastern Essex, MA, Eastern Hampshire, MA, Eastern Hampden, MA, Southern Worcester, MA, Western Norfolk, MA, Southeast Middlesex, MA, Suffolk, MA, Eastern Norfolk, MA, Northern Bristol, MA, Western Plymouth, MA, Eastern Plymouth, MA, Southern Bristol, MA, Southern Plymouth, MA, Northwest Middlesex County, MA, Northwest Providence, RI, Southeast Providence, RI, Western Kent, RI, Eastern Kent, RI, Bristol, RI, Washington, RI, Newport, RI
Expires 7:00 PM
37 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
24°
15%
4 AM
22°
3%
5 AM
22°
6%
6 AM
23°
4%
7 AM
24°
4%
8 AM
26°
10%
9 AM
28°
23%
10 AM
29°
25%
11 AM
31°
26%
12 PM
32°
26%
1 PM
33°
27%
2 PM
33°
28%
3 PM
33°
28%
4 PM
34°
29%
5 PM
33°
37%
6 PM
31°
34%
7 PM
30°
35%
8 PM
28°
38%
9 PM
28°
39%
10 PM
27°
47%
11 PM
27°
53%
12 AM
27°
57%
1 AM
26°
55%
2 AM
26°
54%
7-Day Forecast
Today
34° 23°
Mostly Clear with a 39% chance of rain.
Sat
34° 23°
Partly Cloudy with a 60% chance of rain.
Sun
37° 22°
Mostly Clear.
Mon
33° 19°
Mostly Clear with a 37% chance of rain.
Tue
35° 22°
Drizzle, 56% chance.
Wed
33° 20°
Rain, 65% chance.
Thu
30° 18°
Rain, 63% chance.
TimeTempConditionsPrecipWindHumidity
Now 24° Mostly Clear 15% 4 mph SW 94%
4 AM 22° Clear 3% 4 mph WSW 94%
5 AM 22° Clear 6% 4 mph WSW 92%
6 AM 23° Clear 4% 5 mph W 89%
7 AM 24° Clear 4% 5 mph W 85%
8 AM 26° Clear 10% 5 mph WNW 78%
9 AM 28° Clear 23% 6 mph WNW 70%
10 AM 29° Clear 25% 5 mph WNW 60%
11 AM 31° Clear 26% 5 mph W 55%
12 PM 32° Clear 26% 5 mph W 50%
1 PM 33° Clear 27% 5 mph W 46%
2 PM 33° Clear 28% 5 mph W 46%
3 PM 33° Mostly Clear 28% 5 mph W 48%
4 PM 34° Mostly Clear 29% 6 mph W 50%
5 PM 33° Mostly Clear 37% 5 mph WSW 55%
6 PM 31° Mostly Clear 34% 5 mph SW 62%
7 PM 30° Partly Cloudy 35% 5 mph SW 69%
8 PM 28° Partly Cloudy 38% 5 mph SW 74%
9 PM 28° Partly Cloudy 39% 5 mph SW 77%
10 PM 27° Partly Cloudy 47% 5 mph SW 80%
11 PM 27° Mostly Cloudy 53% 5 mph SW 82%
12 AM 27° Mostly Cloudy 57% 5 mph WSW 83%
1 AM 26° Heavy Rain 55% 5 mph WSW 84%
2 AM 26° Mostly Cloudy 54% 5 mph WSW 85%
15-Day Forecast
Today
8/7
Mostly Clear
39%
23°
34°
Sat
8/8
Partly Cloudy
60%
23°
34°
Sun
8/9
Mostly Clear
16%
22°
37°
Mon
8/10
Mostly Clear
37%
19°
33°
Tue
8/11
Drizzle
56%
22°
35°
Wed
8/12
Rain
65%
20°
33°
Thu
8/13
Rain
63%
18°
30°
Fri
8/14
Rain
73%
17°
29°
Sat
8/15
Partly Cloudy
35%
17°
29°
Sun
8/16
Clear
36%
17°
28°
Mon
8/17
Drizzle
60%
17°
28°
Tue
8/18
Clear
60%
16°
28°
Wed
8/19
Drizzle
60%
16°
29°
Thu
8/20
Clear
60%
17°
29°
Fri
8/21
Drizzle
60%
17°
29°
37
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
PM2.5
Fine particulate matter
23 AQI 4.1 µg/m³
O3
Ground-level ozone
Dominant
37 AQI 41 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 37 Good 37 23
Sat 45 Good 45 36
Sun 49 Good 49 45
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 Fri Aug 7, 06:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE1020 J/kg
MLCAPE964 J/kg
MUCAPE1076 J/kg
SBCIN-142 J/kg
MLCIN0 J/kg
Lifted Index-2.6
Kinematics
0–6 km Shear22 kt
0–1 km Shear8 kt
Eff. Shear24 kt
0–1 km SRH-33
0–3 km SRH-58
Eff. SRH-58
Storm Motion209° @ 23 kt
0–1 km EHI-0.2
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index32.5
Thermo & Levels
PWAT2.04 in
0–3 km LR4.6 °C/km
700–500 LR5.9 °C/km
Total Totals44.8
LCL996 hPa
LFC767 hPa
EL203 hPa
Freezing Lvl15,873 ft