Frost Advisory
Ends in 8 h 52 min
When
Until 9 AM EDT Saturday.
Where
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, 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: Northeast Suffolk; Southeast Suffolk
See it on weather.gov (opens in a new tab)

Observed 11:45 PM EDT at KHWV

Calverton, NY weather

Clear and 37°3°.

Forecasts agree

Now 37°3°

Clear

Wind: Calm; Up to 5 mph8 km/h through 12 PM
Dew point: 36°2°; Comfortable
Humidity: 93%; Air 37°3°, dew point 36°2° · fog or dew likely
UV index: 0Low; Moderate 11 AM–3 PM · peak 4
Air today: 50Good; EPA forecast · PM2.5 (fine particles)
Pressure: 30.46 inHg1031 hPa; Rising slowly · +0.02 inHg+0.6 hPa next 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

18°10° cooler than this time yesterday (55°13° then, 37°3° now)

Good hours for

Low 34°1° today at 7 AM
Above 50°10° today by 10 AM
High 61°16° today at noon
Below 50°10° tonight after 7 PM
Drops 13°7° tomorrow 5–8 PM (61°16° → 48°9°)

TonightDown to 35°2° by 5 AM · Clear
This morningUp to 60°16° by 11 AM · Partly cloudy
This afternoonDown to 56°13° by 1 PM · Mostly cloudy
TonightDown to 38°3° by 2 AM · Clear
Tomorrow morningUp to 57°14° by 11 AM · Clear
Tomorrow afternoonUp to 64°18° by 3 PM · Clear
Tomorrow nightDown to 39°4° by 10 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 12a	Clear	39°4° (likely 39°4° to 49°9°)	39°4°	0%	3 mph5 km/h from E, gusts 7 mph11 km/h	85%	11%	0
Sat 1a	Clear	37°3° (likely 37°3° to 48°9°)	37°3°	0%	2 mph3 km/h from NE, gusts 6 mph10 km/h	96%	7%	0
Sat 2a	Clear	36°2° (likely 36°2° to 48°9°)	36°2°	0%	2 mph3 km/h from NE, gusts 5 mph8 km/h	100%	4%	0
Sat 3a	Clear	37°3° (likely 37°3° to 47°8°)	37°3°	0%	2 mph3 km/h from NE, gusts 3 mph5 km/h	96%	8%	0
Sat 4a	Clear	36°2° (likely 36°2° to 46°8°)	36°2°	0%	2 mph3 km/h from NE, gusts 3 mph5 km/h	100%	12%	0
Sat 5a	Clear	35°2° (likely 35°2° to 46°8°)	35°2°	0%	2 mph3 km/h from NE, gusts 3 mph5 km/h	100%	11%	0
Sat 6a	Partly cloudy	35°2° (likely 35°2° to 47°8°)	35°2°	0%	2 mph3 km/h from NE, gusts 5 mph7 km/h	100%	17%	0
Sat 7a	Partly sunny	34°1° (likely 34°1° to 46°8°)	34°1°	0%	3 mph5 km/h from NE, gusts 6 mph10 km/h	100%	43%	0
Sat 8a	Cloudy	36°2° (likely 36°2° to 46°8°)	36°2°	0%	3 mph5 km/h from NE, gusts 6 mph10 km/h	100%	78%	0
Sat 9a	Cloudy	46°8° (likely 46°8° to 49°9°)	46°8°	0%	3 mph5 km/h from N, gusts 5 mph9 km/h	86%	74%	1
Sat 10a	Cloudy	54°12° (likely 51°11° to 54°12°)	54°12°	0%	3 mph5 km/h from N, gusts 7 mph11 km/h	64%	74%	2
Sat 11a	Cloudy	60°16° (likely 53°12° to 60°16°)	60°16°	0%	3 mph5 km/h from N, gusts 6 mph10 km/h	49%	63%	3
Sat 12p	Cloudy	61°16° (likely 55°13° to 61°16°)	61°16°	0%	5 mph8 km/h from N, gusts 8 mph13 km/h	46%	62%	3
Sat 1p	Cloudy	56°13° (likely 56°13° to 59°15°)	56°13°	0%	5 mph8 km/h from NW, gusts 9 mph14 km/h	53%	78%	4
Sat 2p	Cloudy	58°14° (likely 58°14° to 59°15°)	58°14°	0%	5 mph8 km/h from NW, gusts 9 mph14 km/h	47%	80%	3
Sat 3p	Cloudy	58°14° (likely 58°14° to 60°16°)	58°14°	0%	5 mph8 km/h from NW, gusts 9 mph14 km/h	45%	73%	2
Sat 4p	Sunny	59°15° (likely 59°15° to 59°15°)	59°15°	0%	3 mph5 km/h from W, gusts 8 mph13 km/h	44%	39%	2
Sat 5p	Cloudy	58°14° (likely 57°14° to 58°14°)	58°14°	0%	3 mph5 km/h from W, gusts 6 mph9 km/h	49%	67%	1
Sat 6p	Partly cloudy	52°11° (likely 52°11° to 55°13°)	52°11°	0%	2 mph3 km/h from W, gusts 5 mph9 km/h	63%	57%	0
Sat 7p	Mostly clear	47°8° (likely 47°8° to 54°12°)	47°8°	0%	2 mph3 km/h from SW, gusts 8 mph12 km/h	76%	48%	0
Sat 8p	Clear	42°6° (likely 42°6° to 53°12°)	42°6°	0%	2 mph3 km/h from SW, gusts 8 mph12 km/h	93%	24%	0
Sat 9p	Clear	42°6° (likely 42°6° to 51°11°)	42°6°	0%	2 mph3 km/h from W, gusts 7 mph12 km/h	93%	4%	0
Sat 10p	Clear	41°5° (likely 41°5° to 50°10°)	41°5°	0%	2 mph3 km/h from W, gusts 8 mph14 km/h	93%	1%	0
Sat 11p	Clear	41°5° (likely 41°5° to 49°9°)	41°5°	0%	2 mph3 km/h from NW, gusts 8 mph13 km/h	93%	0%	0
Sun 12a	Clear	39°4° (likely 39°4° to 48°9°)	39°4°	0%	2 mph3 km/h from NW, gusts 9 mph14 km/h	100%	0%	0
Sun 1a	Clear	39°4° (likely 39°4° to 48°9°)	39°4°	0%	2 mph3 km/h from NW, gusts 8 mph13 km/h	100%	1%	0
Sun 2a	Clear	38°3° (likely 38°3° to 47°8°)	38°3°	0%	2 mph3 km/h from NW, gusts 8 mph12 km/h	100%	2%	0
Sun 3a	Clear	38°3° (likely 38°3° to 46°8°)	38°3°	0%	2 mph3 km/h from NW, gusts 10 mph16 km/h	100%	6%	0
Sun 4a	Clear	38°3° (likely 38°3° to 46°8°)	38°3°	0%	2 mph3 km/h from NW, gusts 11 mph18 km/h	100%	4%	0
Sun 5a	Clear	38°3° (likely 37°3° to 48°9°)	38°3°	0%	2 mph3 km/h from NW, gusts 11 mph17 km/h	100%	4%	0
Sun 6a	Clear	36°2° (likely 36°2° to 49°9°)	36°2°	0%	2 mph3 km/h from NW, gusts 10 mph15 km/h	100%	4%	0
Sun 7a	Sunny	36°2° (likely 36°2° to 48°9°)	36°2°	0%	2 mph3 km/h from NW, gusts 8 mph14 km/h	100%	0%	0
Sun 8a	Sunny	39°4° (likely 38°3° to 48°9°)	39°4°	0%	2 mph3 km/h from NW, gusts 6 mph10 km/h	100%	2%	0
Sun 9a	Sunny	49°9° (likely 45°7° to 50°10°)	49°9°	0%	2 mph3 km/h from NW, gusts 6 mph10 km/h	83%	2%	1
Sun 10a	Sunny	54°12° (likely 53°12° to 56°13°)	54°12°	0%	2 mph3 km/h from NW, gusts 6 mph10 km/h	69%	0%	2
Sun 11a	Sunny	57°14° (likely 57°14° to 59°15°)	57°14°	0%	3 mph5 km/h from NW, gusts 6 mph9 km/h	59%	0%	3
Sun 12p	Sunny	59°15° (likely 59°15° to 62°17°)	59°15°	0%	3 mph5 km/h from NW, gusts 6 mph9 km/h	55%	0%	4
Sun 1p	Sunny	61°16° (likely 60°16° to 63°17°)	61°16°	0%	3 mph5 km/h from NW, gusts 6 mph10 km/h	51%	0%	4
Sun 2p	Sunny	63°17° (likely 61°16° to 64°18°)	63°17°	0%	3 mph5 km/h from W, gusts 6 mph10 km/h	48%	0%	4
Sun 3p	Sunny	64°18° (likely 61°16° to 64°18°)	64°18°	0%	3 mph5 km/h from W, gusts 6 mph10 km/h	46%	0%	3
Sun 4p	Sunny	64°18° (likely 61°16° to 64°18°)	64°18°	0%	2 mph3 km/h from SW, gusts 6 mph10 km/h	46%	0%	2
Sun 5p	Sunny	61°16° (likely 59°15° to 61°16°)	61°16°	0%	2 mph3 km/h from SW, gusts 7 mph11 km/h	51%	0%	1
Sun 6p	Clear	55°13° (likely 53°12° to 58°14°)	55°13°	0%	2 mph3 km/h from SW, gusts 7 mph11 km/h	64%	0%	0
Sun 7p	Clear	48°9° (likely 48°9° to 56°13°)	48°9°	0%	2 mph3 km/h from SW, gusts 8 mph13 km/h	86%	0%	0
Sun 8p	Clear	43°6° (likely 43°6° to 54°12°)	43°6°	0%	2 mph3 km/h from SW, gusts 8 mph13 km/h	100%	0%	0
Sun 9p	Clear	40°4° (likely 40°4° to 57°14°)	40°4°	0%	2 mph3 km/h from SW, gusts 6 mph10 km/h	100%	0%	0
Sun 10p	Clear	39°4° (likely 39°4° to 57°14°)	39°4°	0%	2 mph3 km/h from SW, gusts 6 mph10 km/h	100%	0%	0
Sun 11p	Clear	39°4° (likely 39°4° to 57°14°)	39°4°	0%	2 mph3 km/h from SW, gusts 7 mph11 km/h	100%	0%	0

Days ahead

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

Today, Oct 24. Cloudy. High 61°16°, low 34°1°. Typical 61°16° / 40°4°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Cloudy, 36°2°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 61°16°
  Dry
3. Evening
  6 PM–midnight
  Clear, 42°6°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 38°3°
  Dry
Official NWS forecast
Today: Areas of frost before 9am. Partly sunny. High near 61, with temperatures falling to around 58 in the afternoon. North wind around 5 mph.
Tonight: Areas of frost. Mostly clear, with a low around 34. Northeast wind around 3 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
59°15°–61°16°
Low, likely
34°1°–45°7°
Typical high / low
61°16° / 40°4°
Wind
7 mph12 km/h, gusts 13 mph21 km/h
UV peak
4
Tomorrow, Oct 25. Sunny. High 64°18°, low 37°3°. Typical 60°16° / 39°4°. Dry. Mostly 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, 43°6°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 46°8°
  Dry
Official NWS forecast
Day: Areas of frost before 9am. Sunny. High near 64, with temperatures falling to around 61 in the afternoon. West wind around 3 mph.
Night: Clear. Low around 37, with temperatures rising to around 39 overnight. Southwest wind around 3 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
61°16°–64°18°
Low, likely
37°3°–46°8°
Typical high / low
60°16° / 39°4°
Wind
7 mph11 km/h, gusts 17 mph28 km/h
UV peak
4
Monday, Oct 26. Sunny. High 64°18°, low 47°8°. Typical 60°16° / 39°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 46°8°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 64°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 56°13°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 54°12°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Patchy frost before 9am. Sunny, with a high near 64.
Night: Mostly clear, with a low around 47.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
62°17°–66°19°
Low, likely
41°5°–49°9°
Typical high / low
60°16° / 39°4°
Wind
11 mph17 km/h, gusts 27 mph44 km/h
UV peak
4
Tuesday, Oct 27. Mostly sunny. High 58°14°, low 40°4°. Typical 60°16° / 39°4°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 51°10°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 55°13°
  Dry
3. Evening
  6 PM–midnight
  Clear, 50°10°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 45°7°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 58.
Night: Mostly clear, with a low around 40.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
56°13°–58°14°
Low, likely
40°4°–50°10°
Typical high / low
60°16° / 39°4°
Wind
16 mph26 km/h, gusts 26 mph42 km/h
UV peak
4
Wednesday, Oct 28. Partly sunny. High 55°13°, low 45°7°. Typical 59°15° / 38°3°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 45°7°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 54°12°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 49°10°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 49°9°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 55.
Night: Partly cloudy, with a low around 45.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
53°12°–57°14°
Low, likely
42°6°–47°8°
Typical high / low
59°15° / 38°3°
Wind
12 mph19 km/h
UV peak
4
Thursday, Oct 29. Partly sunny. High 62°17°, low 50°10°. Typical 59°15° / 38°3°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 50°10°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 60°16°
  Dry
3. Evening
  6 PM–midnight
  Clear, 56°13°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 54°12°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 62.
Night: Partly cloudy, with a low around 50.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
59°15°–63°17°
Low, likely
45°7°–53°12°
Typical high / low
59°15° / 38°3°
Wind
15 mph24 km/h, gusts 22 mph36 km/h
UV peak
4
Friday, Oct 30. Partly sunny. High 64°18°, low 52°11°. Typical 59°15° / 38°3°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 52°11°
  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, 53°11°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 64.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
63°17°–68°20°
Low, likely
48°9°–56°13°
Typical high / low
59°15° / 38°3°
Wind
12 mph19 km/h, gusts 24 mph38 km/h
UV peak
4
Saturday, Oct 31. Partly sunny. High 63°17°, low 52°11°. Typical 58°14° / 38°3°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 52°11°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 61°16°
  Dry
3. Evening
  6 PM–midnight
  Clear, 56°13°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 54°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.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
60°16°–68°20°
Low, likely
51°11°–53°12°
Typical high / low
58°14° / 38°3°
Wind
17 mph28 km/h, gusts 28 mph45 km/h
UV peak
4
Sunday, Nov 1. Cloudy. High 61°16°, low 54°12°. Typical 58°14° / 37°3°. Rain 0.01 in0.3 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 54°12°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 59°15°
  Dry
3. Evening
  6 PM–midnight
  Clear, 57°14°
  20% chance
4. Overnight
  midnight–6 AM
  Cloudy, 57°14°
  20% chance
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
55°13°–67°19°
Low, likely
47°8°–58°14°
Typical high / low
58°14° / 37°3°
Wind
17 mph27 km/h, gusts 26 mph42 km/h
UV peak
4
Monday, Nov 2. Drizzle. High 62°17°, low 55°13°. Typical 58°14° / 37°3°. Rain 0.11 in2.8 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 55°13°
  20% chance
2. Afternoon
  noon–6 PM
  Cloudy, 59°15°
  20% chance · 0.04 in1 mm
3. Evening
  6 PM–midnight
  Drizzle, 59°15°
  30% chance · 0.2 in5.2 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
54°12°–67°19°
Low, likely
44°7°–62°17°
Typical high / low
58°14° / 37°3°
Wind
23 mph37 km/h, gusts 32 mph52 km/h
UV peak
2

10 days15 days30 days

The outlook

Today
Dry, high 61°, low 34°.
Tomorrow
Dry, high 64°, low 37°, warming up.
Monday
Dry, high 64°, low 47°.
Rest of week
Mostly dry, highs 55–64°.

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

Peconic River at Riverhead (IN MLLW)

7.0 mi

Below flood stage

Level: 4.2 ft

Reading from Fri 10:54 PM · NWS gauge page

Moriches Bay at Moriches Bay (IN MLLW)

9.2 mi

Below flood stage

Level: 2.4 ft

Reading from Fri 10:48 PM · NWS gauge page

Shinnecock Bay at Ponquogue (IN MLLW)

15 mi

Below flood stage

Level: 1.9 ft

Reading from Fri 10:48 PM · NWS gauge page

Great South Bay at Watch Hill (IN MLLW)

19 mi

Below flood stage

Level: 2.5 ft

Reading from Fri 10 PM · NWS gauge page

For your home

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

Heating this week

About 68% less heating than a typical week.

This week 36Typical 111

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 27
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 24 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 36°F).

Open the windows?

Today, 11:00 AM–12:00 PM

Good stretch to open the windows.

Is this typical?

Westhampton Gabreski Airport · official normals 1991–2020 · records 1951–2026

Oct 24, today vs a typical year

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

Last 7 days vs normal

On average 4°2° warmer than normal (daily mean temperature).

+4°+2°SatOct 17
—SunOct 18
—MonOct 19
—TueOct 20
—WedOct 21
—ThuOct 22
—FriOct 23

Calverton weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 10 h 45 min; Losing 2 min 35 s a day; shortest Dec 21, 1 h 31 min less
Golden hour: 5:19–6:14 PM; Morning 6:55–7:50 AM
Blue hour: 6:14–6:25 PM; Morning 6:44–6:55 AM; first light 6:44 AM

Stars tonight? Good

Clear 12:08–6:44 AM; moon 96% lit, sets 5:23 AM.

Moon

Waxing gibbous

95% lit · growing

Today: sets 5:23 AM · rises 4:54 PM
Full moon: Oct 26
New moon: Nov 9

Looking north from Calverton. The highest point on the skyline is about 3,900 ft, 59 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

Calverton, NY weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Monday

Rest of week

What changed since yesterday

Radar

Rivers

Peconic River at Riverhead (IN MLLW)

Moriches Bay at Moriches Bay (IN MLLW)

Shinnecock Bay at Ponquogue (IN MLLW)

Great South Bay at Watch Hill (IN MLLW)

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? Good

Moon