Derby, Vermont

Last updated: 5:26 PM CDT  ·  Refresh
22°C
Feels like 23°
Mostly Cloudy
▲ 22°  /  ▼ 16°
Wind
5 mph NW
Humidity
86%
Dew Point
19°
Pressure
28.98 inHg
Visibility
10 mi
UV Index
2.9
Cloud Cover
63%
Sunrise
5:53 AM
Sunset
7:51 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Derby is currently mostly cloudy at 21°C. Dry conditions are expected through the next 24 hours. Sunrise: 5:53AM · Sunset: 7:51PM.

Alerts

No active alerts for this location.
33 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
22°
43%
7 PM
22°
39%
8 PM
22°
21%
9 PM
21°
21%
10 PM
20°
39%
11 PM
19°
39%
12 AM
18°
31%
1 AM
18°
15%
2 AM
18°
12%
3 AM
18°
12%
4 AM
17°
16%
5 AM
16°
16%
6 AM
16°
17%
7 AM
17°
13%
8 AM
17°
13%
9 AM
18°
13%
10 AM
19°
17%
11 AM
19°
17%
12 PM
21°
18%
1 PM
23°
15%
2 PM
23°
15%
3 PM
23°
16%
4 PM
23°
16%
5 PM
23°
16%
7-Day Forecast
Tonight
22° 16°
Mostly Cloudy with a 43% chance of rain.
Tue
24° 16°
Mostly Cloudy with a 31% chance of rain.
Wed
24° 14°
Mostly Cloudy with a 33% chance of rain.
Thu
22° 13°
Partly Cloudy with a 29% chance of rain.
Fri
22° 11°
Partly Cloudy.
Sat
24° 11°
Rain, 74% chance.
Sun
22° 13°
Drizzle, 74% chance.
TimeTempConditionsPrecipWindHumidity
Now 22° Mostly Cloudy 43% 5 mph NW 86%
7 PM 22° Partly Cloudy 39% 4 mph NNW 86%
8 PM 22° Partly Cloudy 21% 4 mph NNW 89%
9 PM 21° Partly Cloudy 21% 2 mph N 90%
10 PM 20° Partly Cloudy 39% 2 mph N 92%
11 PM 19° Partly Cloudy 39% 2 mph NNE 93%
12 AM 18° Partly Cloudy 31% 2 mph NE 93%
1 AM 18° Partly Cloudy 15% 3 mph NNE 94%
2 AM 18° Partly Cloudy 12% 3 mph N 94%
3 AM 18° Partly Cloudy 12% 3 mph N 95%
4 AM 17° Partly Cloudy 16% 3 mph N 95%
5 AM 16° Partly Cloudy 16% 3 mph N 95%
6 AM 16° Partly Cloudy 17% 2 mph N 95%
7 AM 17° Haze 13% 2 mph N 95%
8 AM 17° Fog 13% 2 mph N 92%
9 AM 18° Fog 13% 3 mph N 87%
10 AM 19° Fog 17% 3 mph N 82%
11 AM 19° Mostly Cloudy 17% 3 mph N 77%
12 PM 21° Mostly Cloudy 18% 3 mph NNW 70%
1 PM 23° Partly Cloudy 15% 4 mph NNW 64%
2 PM 23° Partly Cloudy 15% 4 mph NNW 61%
3 PM 23° Partly Cloudy 16% 4 mph NNW 60%
4 PM 23° Partly Cloudy 16% 4 mph NNW 60%
5 PM 23° Partly Cloudy 16% 4 mph NW 61%
15-Day Forecast
Today
8/17
Mostly Cloudy
43%
16°
22°
Tue
8/18
Mostly Cloudy
31%
16°
24°
Wed
8/19
Mostly Cloudy
33%
14°
24°
Thu
8/20
Partly Cloudy
29%
13°
22°
Fri
8/21
Partly Cloudy
16%
11°
22°
Sat
8/22
Rain
74%
11°
24°
Sun
8/23
Drizzle
74%
13°
22°
Mon
8/24
Rain
82%
12°
20°
Tue
8/25
Drizzle
68%
12°
21°
Wed
8/26
Drizzle
60%
12°
22°
Thu
8/27
Drizzle
55%
11°
21°
Fri
8/28
Drizzle
60%
10°
19°
Sat
8/29
Drizzle
60%
9°
20°
Sun
8/30
Drizzle
60%
10°
21°
Mon
8/31
Drizzle
60%
11°
21°
33
Good
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

Air quality is satisfactory and poses little or no health risk.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
33 AQI 6.0 µg/m³
O3
Ground-level ozone
25 AQI 28 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Tue 33 Good 25 33
Wed 36 Good 25 36
Thu 31 Good 27 31
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 Mon Aug 17, 21:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 60 70 80 90 100 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE244 J/kg
MLCAPE49 J/kg
MUCAPE244 J/kg
SBCIN-13 J/kg
MLCIN-88 J/kg
Lifted Index-0.8
Kinematics
0–6 km Shear33 kt
0–1 km Shear5 kt
Eff. Shear26 kt
0–1 km SRH8
0–3 km SRH80
Eff. SRH80
Storm Motion301° @ 26 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.3
K-Index5.7
Thermo & Levels
PWAT1.01 in
0–3 km LR5.2 °C/km
700–500 LR5.6 °C/km
Total Totals41.1
LCL946 hPa
LFC562 hPa
EL276 hPa
Freezing Lvl13,862 ft