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

Newton, Massachusetts

Last updated: 2:58 AM CDT  ·  Refresh
24°C
Feels like 28°
Mostly Clear
▲ 34°  /  ▼ 22°
Wind
4 mph SW
Humidity
94%
Dew Point
23°
Pressure
29.91 inHg
Visibility
8 mi
UV Index
0.0
Cloud Cover
14%
Sunrise
5:43 AM
Sunset
7:56 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Newton is currently mostly clear at 24°C. Precipitation is likely — peak probability 58% around 12 AM. Atmospheric instability is elevated (CAPE up to 1290 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
22°
5%
5 AM
22°
6%
6 AM
23°
4%
7 AM
24°
4%
8 AM
27°
10%
9 AM
28°
18%
10 AM
30°
18%
11 AM
31°
19%
12 PM
33°
27%
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°
37%
8 PM
28°
38%
9 PM
28°
51%
10 PM
27°
52%
11 PM
27°
53%
12 AM
26°
57%
1 AM
26°
53%
2 AM
26°
54%
7-Day Forecast
Today
34° 22°
Mostly Clear with a 51% chance of rain.
Sat
34° 22°
Partly Cloudy with a 55% chance of rain.
Sun
37° 21°
Mostly Clear.
Mon
34° 19°
Clear with a 37% chance of rain.
Tue
35° 22°
Drizzle, 56% chance.
Wed
33° 20°
Rain, 65% chance.
Thu
31° 18°
Drizzle, 63% chance.
TimeTempConditionsPrecipWindHumidity
Now 24° Mostly Clear 16% 4 mph SW 94%
4 AM 22° Clear 5% 4 mph WSW 94%
5 AM 22° Clear 6% 4 mph WSW 92%
6 AM 23° Clear 4% 4 mph W 89%
7 AM 24° Clear 4% 5 mph W 85%
8 AM 27° Clear 10% 5 mph WNW 77%
9 AM 28° Clear 18% 5 mph WNW 68%
10 AM 30° Clear 18% 5 mph WNW 59%
11 AM 31° Clear 19% 5 mph W 54%
12 PM 33° Clear 27% 6 mph W 49%
1 PM 33° Clear 27% 6 mph W 46%
2 PM 33° Clear 28% 6 mph W 46%
3 PM 33° Mostly Clear 28% 5 mph W 47%
4 PM 34° Mostly Clear 29% 6 mph W 49%
5 PM 33° Mostly Clear 37% 5 mph WSW 54%
6 PM 31° Partly Cloudy 34% 5 mph WSW 60%
7 PM 30° Partly Cloudy 37% 5 mph SW 66%
8 PM 28° Partly Cloudy 38% 5 mph SW 71%
9 PM 28° Mostly Cloudy 51% 5 mph SW 75%
10 PM 27° Mostly Cloudy 52% 5 mph SW 78%
11 PM 27° Mostly Cloudy 53% 5 mph SW 80%
12 AM 26° Mostly Cloudy 57% 5 mph WSW 82%
1 AM 26° Heavy Rain 53% 6 mph WSW 84%
2 AM 26° Mostly Cloudy 54% 6 mph WSW 86%
15-Day Forecast
Today
8/7
Mostly Clear
51%
22°
34°
Sat
8/8
Partly Cloudy
55%
22°
34°
Sun
8/9
Mostly Clear
13%
21°
37°
Mon
8/10
Clear
37%
19°
34°
Tue
8/11
Drizzle
56%
22°
35°
Wed
8/12
Rain
65%
20°
33°
Thu
8/13
Drizzle
63%
18°
31°
Fri
8/14
Rain
71%
17°
30°
Sat
8/15
Partly Cloudy
35%
17°
29°
Sun
8/16
Clear
36%
17°
29°
Mon
8/17
Drizzle
60%
16°
27°
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%
16°
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
21 AQI 3.8 µg/m³
O3
Ground-level ozone
Dominant
37 AQI 40 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 37 Good 37 21
Sat 44 Good 44 34
Sun 48 Good 48 43
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
SBCAPE975 J/kg
MLCAPE1052 J/kg
MUCAPE1243 J/kg
SBCIN-148 J/kg
MLCIN0 J/kg
Lifted Index-2.5
Kinematics
0–6 km Shear22 kt
0–1 km Shear9 kt
Eff. Shear25 kt
0–1 km SRH-36
0–3 km SRH-61
Eff. SRH-61
Storm Motion209° @ 23 kt
0–1 km EHI-0.2
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index32.1
Thermo & Levels
PWAT2.01 in
0–3 km LR4.6 °C/km
700–500 LR5.9 °C/km
Total Totals44.7
LCL996 hPa
LFC760 hPa
EL205 hPa
Freezing Lvl15,840 ft