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: 2:04 AM CDT  ·  Refresh
24°C
Feels like 29°
Mostly Clear
▲ 34°  /  ▼ 22°
Wind
4 mph SW
Humidity
94%
Dew Point
23°
Pressure
30.00 inHg
Visibility
9 mi
UV Index
0.0
Cloud Cover
11%
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 25°C. Precipitation is likely — peak probability 66% around 3 AM. Atmospheric instability is elevated (CAPE up to 1395 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°
16%
4 AM
24°
3%
5 AM
22°
4%
6 AM
22°
5%
7 AM
23°
3%
8 AM
24°
3%
9 AM
27°
12%
10 AM
28°
20%
11 AM
30°
20%
12 PM
31°
21%
1 PM
33°
21%
2 PM
33°
25%
3 PM
33°
26%
4 PM
33°
26%
5 PM
34°
36%
6 PM
33°
36%
7 PM
31°
33%
8 PM
30°
33%
9 PM
29°
37%
10 PM
28°
38%
11 PM
28°
52%
12 AM
27°
53%
1 AM
27°
58%
2 AM
25°
65%
7-Day Forecast
Today
34° 22°
Clear with a 37% chance of rain.
Sat
34° 22°
Partly Cloudy with a 78% chance of rain.
Sun
37° 21°
Mostly Clear.
Mon
34° 19°
Mostly Clear with a 37% chance of rain.
Tue
36° 22°
Drizzle, 51% chance.
Wed
33° 20°
Rain, 70% chance.
Thu
31° 17°
Drizzle, 63% chance.
TimeTempConditionsPrecipWindHumidity
Now 24° Mostly Clear 16% 4 mph SW 94%
4 AM 24° Clear 3% 5 mph WSW 94%
5 AM 22° Clear 4% 4 mph WSW 94%
6 AM 22° Clear 5% 4 mph WSW 92%
7 AM 23° Clear 3% 5 mph W 88%
8 AM 24° Clear 3% 6 mph W 84%
9 AM 27° Clear 12% 6 mph WNW 75%
10 AM 28° Clear 20% 6 mph WNW 67%
11 AM 30° Clear 20% 6 mph WNW 58%
12 PM 31° Clear 21% 5 mph W 53%
1 PM 33° Clear 21% 5 mph W 49%
2 PM 33° Clear 25% 5 mph W 45%
3 PM 33° Clear 26% 5 mph W 46%
4 PM 33° Mostly Clear 26% 5 mph W 48%
5 PM 34° Mostly Clear 36% 5 mph W 51%
6 PM 33° Mostly Clear 36% 5 mph WSW 57%
7 PM 31° Partly Cloudy 33% 5 mph SW 64%
8 PM 30° Partly Cloudy 33% 5 mph SW 71%
9 PM 29° Partly Cloudy 37% 4 mph SW 75%
10 PM 28° Partly Cloudy 38% 4 mph SW 78%
11 PM 28° Mostly Cloudy 52% 4 mph SW 80%
12 AM 27° Mostly Cloudy 53% 4 mph SW 81%
1 AM 27° Mostly Cloudy 58% 5 mph WSW 83%
2 AM 25° Heavy Rain 65% 5 mph WSW 84%
15-Day Forecast
Today
8/7
Clear
37%
22°
34°
Sat
8/8
Partly Cloudy
78%
22°
34°
Sun
8/9
Mostly Clear
17%
21°
37°
Mon
8/10
Mostly Clear
37%
19°
34°
Tue
8/11
Drizzle
51%
22°
36°
Wed
8/12
Rain
70%
20°
33°
Thu
8/13
Drizzle
63%
17°
31°
Fri
8/14
Rain
80%
16°
30°
Sat
8/15
Drizzle
44%
16°
30°
Sun
8/16
Drizzle
51%
17°
29°
Mon
8/17
Drizzle
60%
17°
28°
Tue
8/18
Drizzle
60%
17°
28°
Wed
8/19
Drizzle
60%
17°
28°
Thu
8/20
Drizzle
60%
17°
29°
Fri
8/21
Drizzle
60%
18°
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, 05:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE1043 J/kg
MLCAPE1018 J/kg
MUCAPE1194 J/kg
SBCIN-135 J/kg
MLCIN0 J/kg
Lifted Index-2.4
Kinematics
0–6 km Shear25 kt
0–1 km Shear10 kt
Eff. Shear28 kt
0–1 km SRH-46
0–3 km SRH-57
Eff. SRH-57
Storm Motion208° @ 24 kt
0–1 km EHI-0.3
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index31.8
Thermo & Levels
PWAT2.01 in
0–3 km LR4.6 °C/km
700–500 LR5.7 °C/km
Total Totals43.6
LCL994 hPa
LFC772 hPa
EL200 hPa
Freezing Lvl16,273 ft