Frost Advisory
Starts in 6 h 19 min
When
From midnight tonight to 9 AM EDT Sunday.
Where
In Connecticut, Southern Fairfield, Southern Middlesex, Southern New Haven, and Southern New London Counties. In New York, Northeast Suffolk and Southeast Suffolk Counties.
Issued for this forecast zone · National Weather Service Upton NY
What, impacts and precautionsHide details
What
Temperatures in the mid 30s, and locally as low 25 to 30 in parts of the Pine Barrens of Long Island, will result in frost formation.
Impacts
Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.
Precautionary actions
Take steps now to protect tender plants from the cold.
Areas: Southern Fairfield; Southern New Haven; Southern Middlesex; Southern New London; Northeast Suffolk; Southeast Suffolk
See it on weather.gov (opens in a new tab)

Observed 5:25 PM EDT at KBDR

Mill Plain, CT weather

Sunny and 61°16°, jacket by 7 PM.

Forecasts agree

Now 61°16°

Sunny

Wind: 8 mph13 km/h; From the southwest. Up to 8 mph13 km/h through 5 AM
Dew point: 39°4°; Comfortable
UV tomorrow: 4Moderate; Moderate 11 AM–4 PM · peak 4
Air today: 50Good; EPA forecast · PM2.5 (fine particles)
Pressure: 30.5 inHg1033 hPa; Steady over the last 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

Good hours for

Below 50°10° tonight after 8 PM
Low 38°3° tonight at 5 AM
Above 50°10° tomorrow by 10 AM
High 64°18° tomorrow at 2 PM

TonightDown to 38°3° by 5 AM · Partly cloudy
Tomorrow morningUp to 58°14° by 11 AM · Clear
Tomorrow afternoonNear 62°17° · Clear
Tomorrow nightDown to 42°6° by 3 AM · Clear
Monday morningUp to 58°14° by 11 AM · Clear
Monday afternoonUp to 67°19° by 3 PM · Clear

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Sat 5p	Sunny	61°16° (likely 57°14° to 61°16°)	61°16°	0%	3 mph5 km/h from W, gusts 6 mph9 km/h	42%	40%	1
Sat 6p	Mostly clear	58°14° (likely 52°11° to 58°14°)	58°14°	0%	3 mph5 km/h from W, gusts 6 mph10 km/h	47%	45%	0
Sat 7p	Mostly clear	54°12° (likely 49°9° to 54°12°)	54°12°	0%	2 mph3 km/h from NW, gusts 6 mph10 km/h	52%	53%	0
Sat 8p	Mostly clear	48°9° (likely 46°8° to 52°11°)	48°9°	0%	2 mph3 km/h from N, gusts 5 mph8 km/h	65%	33%	0
Sat 9p	Clear	46°8° (likely 45°7° to 50°10°)	46°8°	0%	2 mph3 km/h from N, gusts 5 mph7 km/h	68%	40%	0
Sat 10p	Clear	45°7° (likely 44°7° to 49°9°)	45°7°	0%	2 mph3 km/h from N, gusts 5 mph7 km/h	68%	40%	0
Sat 11p	Clear	43°6° (likely 42°6° to 48°9°)	43°6°	0%	2 mph3 km/h from N, gusts 5 mph8 km/h	73%	28%	0
Sun 12a	Clear	42°6° (likely 41°5° to 47°8°)	42°6°	0%	2 mph3 km/h from N, gusts 5 mph9 km/h	73%	14%	0
Sun 1a	Clear	42°6° (likely 40°4° to 46°8°)	42°6°	0%	2 mph3 km/h from NW, gusts 6 mph9 km/h	73%	12%	0
Sun 2a	Clear	40°4° (likely 40°4° to 44°7°)	40°4°	0%	2 mph3 km/h from NW, gusts 6 mph9 km/h	79%	12%	0
Sun 3a	Clear	40°4° (likely 39°4° to 43°6°)	40°4°	0%	2 mph3 km/h from NW, gusts 7 mph11 km/h	79%	10%	0
Sun 4a	Clear	39°4° (likely 39°4° to 42°6°)	39°4°	0%	2 mph3 km/h from N, gusts 7 mph12 km/h	85%	9%	0
Sun 5a	Clear	38°3° (likely 38°3° to 41°5°)	38°3°	0%	2 mph3 km/h from N, gusts 7 mph12 km/h	89%	8%	0
Sun 6a	Clear	38°3° (likely 38°3° to 40°4°)	38°3°	0%	2 mph3 km/h from N, gusts 7 mph12 km/h	89%	9%	0
Sun 7a	Sunny	38°3° (likely 38°3° to 40°4°)	36°2°	0%	3 mph5 km/h from N, gusts 7 mph12 km/h	89%	8%	0
Sun 8a	Sunny	39°4° (likely 39°4° to 42°6°)	37°3°	0%	3 mph5 km/h from N, gusts 7 mph11 km/h	85%	7%	0
Sun 9a	Sunny	46°8° (likely 44°7° to 47°8°)	46°8°	0%	2 mph3 km/h from N, gusts 7 mph12 km/h	68%	0%	1
Sun 10a	Sunny	53°12° (likely 52°11° to 54°12°)	53°12°	0%	1 mph2 km/h from NW, gusts 6 mph9 km/h	57%	0%	2
Sun 11a	Sunny	58°14° (likely 57°14° to 60°16°)	58°14°	0%	1 mph2 km/h from NW, gusts 5 mph8 km/h	49%	0%	3
Sun 12p	Sunny	61°16° (likely 61°16° to 62°17°)	61°16°	0%	2 mph3 km/h from W, gusts 5 mph8 km/h	46%	0%	4
Sun 1p	Sunny	63°17° (likely 62°17° to 64°18°)	63°17°	0%	3 mph5 km/h from SW, gusts 7 mph11 km/h	43%	0%	4
Sun 2p	Sunny	64°18° (likely 62°17° to 64°18°)	64°18°	0%	5 mph8 km/h from SW, gusts 7 mph11 km/h	41%	0%	4
Sun 3p	Sunny	64°18° (likely 62°17° to 65°18°)	64°18°	0%	5 mph8 km/h from SW, gusts 7 mph12 km/h	41%	0%	3
Sun 4p	Sunny	63°17° (likely 62°17° to 65°18°)	63°17°	0%	5 mph8 km/h from SW, gusts 8 mph13 km/h	43%	0%	2
Sun 5p	Sunny	62°17° (likely 60°16° to 63°17°)	62°17°	0%	3 mph5 km/h from SW, gusts 7 mph12 km/h	46%	0%	1
Sun 6p	Clear	60°16° (likely 55°13° to 60°16°)	60°16°	0%	3 mph5 km/h from SW, gusts 5 mph8 km/h	49%	0%	0
Sun 7p	Clear	55°13° (likely 52°11° to 57°14°)	55°13°	0%	2 mph3 km/h from W, gusts 6 mph10 km/h	61%	0%	0
Sun 8p	Clear	51°11° (likely 50°10° to 56°13°)	51°11°	0%	2 mph3 km/h from W, gusts 9 mph14 km/h	71%	0%	0
Sun 9p	Clear	49°9° (likely 49°9° to 55°13°)	49°9°	0%	2 mph3 km/h from W, gusts 9 mph14 km/h	77%	0%	0
Sun 10p	Clear	48°9° (likely 48°9° to 52°11°)	48°9°	0%	2 mph3 km/h from W, gusts 10 mph16 km/h	80%	0%	0
Sun 11p	Clear	45°7° (likely 45°7° to 50°10°)	45°7°	0%	2 mph3 km/h from W, gusts 10 mph16 km/h	89%	0%	0
Mon 12a	Clear	44°7° (likely 44°7° to 49°9°)	44°7°	0%	2 mph3 km/h from W, gusts 10 mph16 km/h	89%	0%	0
Mon 1a	Clear	44°7° (likely 43°6° to 49°9°)	42°6°	0%	3 mph5 km/h from W, gusts 11 mph17 km/h	93%	0%	0
Mon 2a	Clear	43°6° (likely 42°6° to 48°9°)	41°5°	0%	3 mph5 km/h from W, gusts 10 mph15 km/h	96%	0%	0
Mon 3a	Clear	42°6° (likely 42°6° to 47°8°)	40°4°	0%	3 mph5 km/h from W, gusts 10 mph17 km/h	96%	0%	0
Mon 4a	Clear	42°6° (likely 41°5° to 46°8°)	40°4°	0%	3 mph5 km/h from W, gusts 11 mph18 km/h	96%	0%	0
Mon 5a	Clear	42°6° (likely 41°5° to 46°8°)	40°4°	0%	3 mph5 km/h from W, gusts 11 mph18 km/h	96%	0%	0
Mon 6a	Clear	40°4° (likely 40°4° to 45°7°)	38°3°	0%	3 mph5 km/h from W, gusts 11 mph18 km/h	100%	4%	0
Mon 7a	Sunny	40°4° (likely 39°4° to 45°7°)	37°3°	0%	5 mph8 km/h from NW, gusts 10 mph16 km/h	100%	32%	0
Mon 8a	Sunny	41°5° (likely 39°4° to 45°7°)	38°3°	0%	5 mph8 km/h from NW, gusts 9 mph15 km/h	96%	4%	0
Mon 9a	Sunny	47°8° (likely 45°7° to 50°10°)	45°7°	0%	5 mph8 km/h from NW, gusts 11 mph18 km/h	79%	5%	1
Mon 10a	Mostly sunny	53°12° (likely 52°11° to 56°13°)	53°12°	0%	5 mph8 km/h from W, gusts 9 mph15 km/h	69%	15%	2
Mon 11a	Mostly sunny	58°14° (likely 58°14° to 61°16°)	58°14°	0%	5 mph8 km/h from W, gusts 9 mph15 km/h	62%	15%	3
Mon 12p	Sunny	62°17° (likely 62°17° to 65°18°)	62°17°	0%	6 mph10 km/h from W, gusts 8 mph13 km/h	56%	16%	4
Mon 1p	Sunny	65°18° (likely 64°18° to 67°19°)	65°18°	0%	7 mph11 km/h from W, gusts 9 mph14 km/h	54%	5%	4
Mon 2p	Sunny	66°19° (likely 66°19° to 68°20°)	66°19°	0%	8 mph13 km/h from W, gusts 9 mph15 km/h	54%	13%	4
Mon 3p	Sunny	67°19° (likely 66°19° to 68°20°)	67°19°	0%	8 mph13 km/h from W, gusts 10 mph17 km/h	54%	14%	3
Mon 4p	Sunny	66°19° (likely 65°18° to 68°20°)	66°19°	0%	7 mph11 km/h from W, gusts 11 mph18 km/h	58%	11%	2

Days ahead

Shaded: typical range for these dates (1991–2020)

Today, Oct 24. Cloudy. High 62°17°, low 37°3°. Typical 62°17° / 45°7°. Dry. Forecasts agree.
1. Evening
  6 PM–midnight
  Clear, 48°9°
  Dry
2. Overnight
  midnight–6 AM
  Clear, 38°3°
  Dry
Official NWS forecast
Today: Sunny, with a high near 62. West wind around 3 mph.
Tonight: Patchy frost after 5am. Mostly clear, with a low around 37. Northwest wind around 3 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
60°16°–62°17°
Low, likely
36°2°–40°4°
Typical high / low
62°17° / 45°7°
Wind
7 mph12 km/h
UV peak
4
Tomorrow, Oct 25. Sunny. High 64°18°, low 40°4°. Typical 61°16° / 45°7°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 39°4°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 64°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 51°11°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 42°6°
  Dry
Official NWS forecast
Day: Patchy frost before 8am. Sunny. High near 64, with temperatures falling to around 62 in the afternoon. Northwest wind 1 to 5 mph.
Night: Mostly clear. Low around 40, with temperatures rising to around 42 overnight. West wind around 3 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
63°17°–65°18°
Low, likely
38°3°–40°4°
Typical high / low
61°16° / 45°7°
Wind
7 mph11 km/h, gusts 14 mph23 km/h
UV peak
4
Monday, Oct 26. Sunny. High 67°19°, low 45°7°. Typical 61°16° / 45°7°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 41°5°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 67°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 58°15°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 50°10°
  Dry
Official NWS forecast
Day: Sunny. High near 67, with temperatures falling to around 65 in the afternoon. West wind 3 to 8 mph.
Night: Mostly clear. Low around 45, with temperatures rising to around 47 overnight.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
66°19°–68°20°
Low, likely
38°3°–45°7°
Typical high / low
61°16° / 45°7°
Wind
8 mph13 km/h, gusts 18 mph29 km/h
UV peak
4
Tuesday, Oct 27. Sunny. High 59°15°, low 37°3°. Typical 60°16° / 44°7°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 58°14°
  Dry
3. Evening
  6 PM–midnight
  Clear, 50°10°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 42°6°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 59.
Night: Mostly clear, with a low around 37.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
57°14°–60°16°
Low, likely
37°3°–49°9°
Typical high / low
60°16° / 44°7°
Wind
12 mph20 km/h, gusts 26 mph42 km/h
UV peak
4
Wednesday, Oct 28. Mostly sunny. High 58°14°, low 44°7°. Typical 60°16° / 44°7°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 41°5°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 56°13°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 52°11°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 50°10°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 58.
Night: Partly cloudy, with a low around 44.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
54°12°–58°14°
Low, likely
38°3°–44°7°
Typical high / low
60°16° / 44°7°
Wind
9 mph14 km/h, gusts 15 mph24 km/h
UV peak
4
Thursday, Oct 29. Mostly sunny. High 65°18°, low 49°9°. Typical 60°16° / 44°7°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Partly sunny, 50°10°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 64°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 59°15°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 54°12°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 65.
Night: Mostly clear, with a low around 49.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
61°16°–66°19°
Low, likely
46°8°–51°11°
Typical high / low
60°16° / 44°7°
Wind
11 mph17 km/h, gusts 27 mph43 km/h
UV peak
4
Friday, Oct 30. Mostly sunny. High 70°21°, low 48°9°. Typical 59°15° / 43°6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Mostly sunny, 53°12°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 70°21°
  Dry
3. Evening
  6 PM–midnight
  Clear, 60°15°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 51°10°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 70.
Night: Mostly clear, with a low around 48.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
68°20°–71°22°
Low, likely
48°9°–53°12°
Typical high / low
59°15° / 43°6°
Wind
8 mph13 km/h, gusts 26 mph42 km/h
UV peak
4
Saturday, Oct 31. Cloudy. High 63°17°, low 49°9°. Typical 59°15° / 43°6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 51°11°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 65°18°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 57°14°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 53°12°
  Dry
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
60°16°–66°19°
Low, likely
44°7°–52°11°
Typical high / low
59°15° / 43°6°
Wind
9 mph15 km/h, gusts 24 mph39 km/h
UV peak
3
Sunday, Nov 1. Cloudy. High 64°18°, low 52°11°. Typical 59°15° / 43°6°. Rain 0.01 in0.3 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 54°12°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 63°17°
  Dry
3. Evening
  6 PM–midnight
  Drizzle, 60°15°
  40% chance · 0.02 in0.6 mm
4. Overnight
  midnight–6 AM
  Drizzle, 59°15°
  40% chance · 0.11 in2.7 mm
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
57°14°–69°21°
Low, likely
45°7°–58°14°
Typical high / low
59°15° / 43°6°
Wind
9 mph15 km/h, gusts 22 mph35 km/h
UV peak
2
Monday, Nov 2. Drizzle. High 65°18°, low 58°14°. Typical 58°14° / 42°6°. Rain 1.1 in27 mm, 40% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Drizzle, 60°16°
  40% chance · 0.44 in11 mm
2. Afternoon
  noon–6 PM
  Showers, 65°18°
  30% chance · 0.34 in8.7 mm
3. Evening
  6 PM–midnight
  Showers, 63°17°
  30% chance · 0.49 in12 mm
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
61°16°–70°21°
Low, likely
54°12°–65°18°
Typical high / low
58°14° / 42°6°
Wind
18 mph29 km/h, gusts 32 mph51 km/h

10 days15 days30 days

The outlook

Today
Dry, high 62°, low 37°.
Tomorrow
Dry, high 64°, low 40°.
Monday
Dry, high 67°, low 45°, warming up.
Rest of week
Mostly dry, highs 58–70°.

Want the meteorologists’ reasoning? Read the NWS forecast discussion (OKX) (opens in a new tab)

What changed since yesterday

No meaningful changes from yesterday’s forecast.

Radar

Radar data: NOAA MRMS, rendered by forecast.blue

Radar loads when scrolled into view

Full-screen radar

Rivers

NOAA river gauges within 25 mi

Long Island Sound near Bridgeport Harbor (IN MLLW)

4.6 mi

Below flood stage

Level: 0.7 ft

Forecast peak 9.1 ft Tue 12 PM, minor flooding

Reading from Sat 5:06 PM · NWS gauge page

Housatonic River at Stevenson

17 mi

Below flood stage

Level: 2.5 ft
Flow: 488 cfs

Forecast peak 6.7 ft Sat 8 PM

Reading from Sat 4:30 PM · NWS gauge page

Flax Pond at Old Field (IN MLLW)

15 mi

Below flood stage

Level: 4.3 ft

Reading from Sat 4:24 PM · NWS gauge page

Housatonic River above Seymour Wellfield

15 mi

Level: 24.9 ft

Reading from Sat 4:37 PM · NWS gauge page

For your home

What this week’s weather means for heating, cooling, pipes and fresh air.

Heating this week

About 67% less heating than a typical week.

This week 29Typical 89

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 24
h below 17°F: 0
h below 5°F: 0

47, 17 and 5°F are the test points heat pumps are rated at. About 11 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 39°F).

Open the windows?

Sun, 12:00 PM–6:00 PM

Good stretch to open the windows.

Is this typical?

Igor I Sikorsky Memorial Airport · official normals 1991–2020 · records 1948–2026

Oct 24, today vs a typical year

Today’s expected high is about typical for the date.

Last 7 days vs normal

On average 2°1° colder than normal (daily mean temperature).

−8°−4°SunOct 18
−3°−2°MonOct 19
±0°TueOct 20
+2°+1°WedOct 21
+2°+1°ThuOct 22
−2°−1°FriOct 23
—SatOct 24

Mill Plain weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 10 h 44 min; Losing 2 min 35 s a day; shortest Dec 21, 1 h 32 min less
Golden hour: 5:20–6:16 PM; Morning 6:57–7:53 AM
Blue hour: 6:16–6:27 PM; Morning 6:46–6:57 AM; first light 6:46 AM

Stars tonight? Fair

Mostly clear 12–6:47 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

98% lit · growing

Today: sets 5:25 AM · rises 4:55 PM
Full moon: Oct 26
New moon: Nov 9

Looking south from Mill Plain. The highest point on the skyline is about 1,100 ft, 2 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.

1 active weather alert

Frost Advisory

Mill Plain, CT weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Monday

Rest of week

What changed since yesterday

Radar

Rivers

Long Island Sound near Bridgeport Harbor (IN MLLW)

Housatonic River at Stevenson

Flax Pond at Old Field (IN MLLW)

Housatonic River above Seymour Wellfield

For your home

Heating this week

Heat-pump hours, next 7 days

Comfort

Open the windows?

Is this typical?

Oct 24, today vs a typical year

Last 7 days vs normal

Sun & moon

Sun

Stars tonight? Fair

Moon