Frost Advisory
Ends in 38 min
When
Until 9 AM EDT Saturday.
Where
In Connecticut, Southern Fairfield, Southern Middlesex, Southern New Haven, and Southern New London Counties. In New York, Southern Westchester County.
Issued for this forecast zone · National Weather Service Upton NY
What, impacts and precautionsHide details
What
Temperatures as low as the mid 30s 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; Southern Westchester
See it on weather.gov (opens in a new tab)

Observed 7:56 AM EDT at KGON

Deep River Center, CT weather

Sunny and 36°2°.

Mostly agree

Now 36°2°

Sunny · Feels like 31°0°

Wind: 6 mph9 km/h; From the north. Up to 6 mph9 km/h through 8 PM
Dew point: 29°−2°; Dry · up to 37°3° by 9 AM (comfortable)
UV index: 0Low; Moderate 12–3 PM · peak 3
Air today: 39Good; EPA forecast · PM2.5 (fine particles)
Pressure: 30.53 inHg1034 hPa; Rising slowly · +0.02 inHg+0.8 hPa in 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

8°5° cooler than this time yesterday (44°7° then, 36°2° now)

Good hours for

Above 50°10° today by 10 AM
High 61°16° today at 2 PM
Below 50°10° tonight after 8 PM
Low 37°3° tonight at 5 AM

This morningUp to 56°13° by 11 AM · Partly cloudy
This afternoonNear 59°15° · Partly cloudy
TonightDown to 37°3° by 5 AM · Clear
Tomorrow morningUp to 57°14° by 11 AM · Clear
Tomorrow afternoonUp to 65°18° by 3 PM · Clear
Tomorrow nightDown to 39°4° by 5 AM · 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 8a	Mostly cloudy	38°3° (likely 31°−1° to 38°3°)	38°3°	0%	2 mph3 km/h from N, gusts 9 mph14 km/h	85%	53%	0
Sat 9a	Cloudy	43°6° (likely 39°4° to 43°6°)	43°6°	0%	2 mph3 km/h from N, gusts 11 mph18 km/h	79%	74%	0
Sat 10a	Partly sunny	50°10° (likely 44°7° to 50°10°)	50°10°	0%	1 mph2 km/h from N, gusts 12 mph19 km/h	66%	56%	1
Sat 11a	Mostly cloudy	56°13° (likely 50°10° to 56°13°)	56°13°	0%	2 mph3 km/h from NW, gusts 10 mph17 km/h	53%	50%	2
Sat 12p	Partly sunny	59°15° (likely 53°12° to 59°15°)	59°15°	0%	2 mph3 km/h from NW, gusts 9 mph15 km/h	45%	53%	3
Sat 1p	Cloudy	60°16° (likely 56°13° to 60°16°)	60°16°	0%	3 mph5 km/h from NW, gusts 9 mph15 km/h	44%	56%	3
Sat 2p	Cloudy	61°16° (likely 57°14° to 62°17°)	61°16°	0%	3 mph5 km/h from NW, gusts 9 mph14 km/h	41%	57%	3
Sat 3p	Partly sunny	61°16° (likely 58°14° to 62°17°)	61°16°	0%	3 mph5 km/h from NW, gusts 8 mph14 km/h	42%	54%	2
Sat 4p	Partly sunny	60°16° (likely 58°14° to 62°17°)	60°16°	0%	3 mph5 km/h from W, gusts 8 mph13 km/h	44%	39%	1
Sat 5p	Mostly sunny	59°15° (likely 56°13° to 59°15°)	59°15°	0%	1 mph2 km/h from W, gusts 7 mph11 km/h	51%	14%	0
Sat 6p	Clear	54°12° (likely 51°11° to 54°12°)	54°12°	0%	1 mph2 km/h from W, gusts 6 mph10 km/h	59%	2%	0
Sat 7p	Clear	50°10° (likely 47°8° to 50°10°)	50°10°	0%	0 mph0 km/h, gusts 5 mph8 km/h	68%	4%	0
Sat 8p	Clear	47°8° (likely 45°7° to 47°8°)	47°8°	0%	0 mph0 km/h, gusts 5 mph8 km/h	79%	3%	0
Sat 9p	Clear	45°7° (likely 44°7° to 46°8°)	45°7°	0%	0 mph0 km/h, gusts 5 mph7 km/h	79%	0%	0
Sat 10p	Clear	43°6° (likely 43°6° to 45°7°)	43°6°	0%	0 mph0 km/h, gusts 4 mph7 km/h	86%	0%	0
Sat 11p	Clear	42°6° (likely 41°5° to 44°7°)	42°6°	0%	0 mph0 km/h, gusts 5 mph9 km/h	86%	0%	0
Sun 12a	Clear	42°6° (likely 41°5° to 42°6°)	42°6°	0%	0 mph0 km/h, gusts 6 mph10 km/h	82%	0%	0
Sun 1a	Clear	41°5° (likely 40°4° to 41°5°)	41°5°	0%	0 mph0 km/h, gusts 6 mph10 km/h	85%	0%	0
Sun 2a	Clear	39°4° (likely 39°4° to 40°4°)	39°4°	0%	0 mph0 km/h, gusts 7 mph10 km/h	89%	0%	0
Sun 3a	Clear	39°4° (likely 38°3° to 40°4°)	39°4°	0%	0 mph0 km/h, gusts 7 mph11 km/h	89%	0%	0
Sun 4a	Clear	38°3° (likely 36°2° to 39°4°)	38°3°	0%	1 mph2 km/h from NW, gusts 7 mph11 km/h	92%	0%	0
Sun 5a	Clear	37°3° (likely 36°2° to 38°3°)	37°3°	0%	1 mph2 km/h from NW, gusts 7 mph12 km/h	96%	0%	0
Sun 6a	Clear	37°3° (likely 35°2° to 38°3°)	37°3°	0%	1 mph2 km/h from NW, gusts 7 mph12 km/h	85%	0%	0
Sun 7a	Sunny	37°3° (likely 34°1° to 38°3°)	37°3°	0%	1 mph2 km/h from NW, gusts 7 mph12 km/h	82%	0%	0
Sun 8a	Sunny	36°2° (likely 36°2° to 39°4°)	36°2°	0%	2 mph3 km/h from NW, gusts 7 mph11 km/h	89%	0%	0
Sun 9a	Sunny	42°6° (likely 42°6° to 45°7°)	42°6°	0%	1 mph2 km/h from NW, gusts 7 mph11 km/h	82%	0%	1
Sun 10a	Sunny	51°11° (likely 51°11° to 53°12°)	51°11°	0%	1 mph2 km/h from NW, gusts 7 mph11 km/h	61%	0%	2
Sun 11a	Sunny	57°14° (likely 56°13° to 59°15°)	57°14°	0%	0 mph0 km/h, gusts 6 mph10 km/h	49%	0%	3
Sun 12p	Sunny	61°16° (likely 60°16° to 63°17°)	61°16°	0%	1 mph2 km/h from W, gusts 5 mph9 km/h	41%	0%	4
Sun 1p	Sunny	63°17° (likely 63°17° to 66°19°)	63°17°	0%	2 mph3 km/h from W, gusts 7 mph11 km/h	38%	0%	4
Sun 2p	Sunny	64°18° (likely 64°18° to 67°19°)	64°18°	0%	2 mph3 km/h from W, gusts 6 mph9 km/h	37%	0%	4
Sun 3p	Sunny	65°18° (likely 64°18° to 66°19°)	65°18°	0%	2 mph3 km/h from SW, gusts 6 mph10 km/h	35%	0%	3
Sun 4p	Sunny	63°17° (likely 62°17° to 65°18°)	63°17°	0%	2 mph3 km/h from SW, gusts 8 mph12 km/h	39%	0%	2
Sun 5p	Sunny	61°16° (likely 59°15° to 62°17°)	61°16°	0%	2 mph3 km/h from SW, gusts 8 mph13 km/h	46%	0%	1
Sun 6p	Clear	57°14° (likely 53°12° to 57°14°)	57°14°	0%	1 mph2 km/h from SW, gusts 8 mph14 km/h	53%	0%	0
Sun 7p	Clear	51°11° (likely 50°10° to 51°11°)	51°11°	0%	1 mph2 km/h from SW, gusts 9 mph15 km/h	68%	0%	0
Sun 8p	Clear	48°9° (likely 48°9° to 49°9°)	48°9°	0%	0 mph0 km/h, gusts 7 mph11 km/h	80%	0%	0
Sun 9p	Clear	46°8° (likely 46°8° to 48°9°)	46°8°	0%	0 mph0 km/h, gusts 7 mph11 km/h	83%	0%	0
Sun 10p	Clear	44°7° (likely 44°7° to 47°8°)	44°7°	0%	0 mph0 km/h, gusts 8 mph13 km/h	86%	0%	0
Sun 11p	Clear	43°6° (likely 43°6° to 46°8°)	43°6°	0%	0 mph0 km/h, gusts 8 mph13 km/h	86%	0%	0
Mon 12a	Clear	42°6° (likely 42°6° to 46°8°)	42°6°	0%	0 mph0 km/h, gusts 8 mph13 km/h	86%	0%	0
Mon 1a	Clear	41°5° (likely 41°5° to 46°8°)	41°5°	0%	1 mph2 km/h from W, gusts 8 mph12 km/h	89%	0%	0
Mon 2a	Clear	41°5° (likely 41°5° to 46°8°)	41°5°	0%	1 mph2 km/h from W, gusts 7 mph11 km/h	85%	0%	0
Mon 3a	Clear	40°4° (likely 40°4° to 45°7°)	40°4°	0%	1 mph2 km/h from W, gusts 4 mph6 km/h	89%	0%	0
Mon 4a	Clear	40°4° (likely 40°4° to 44°7°)	40°4°	0%	1 mph2 km/h from W, gusts 4 mph6 km/h	89%	0%	0
Mon 5a	Clear	39°4° (likely 39°4° to 43°6°)	39°4°	0%	1 mph2 km/h from W, gusts 3 mph6 km/h	92%	1%	0
Mon 6a	Clear	38°3° (likely 38°3° to 43°6°)	38°3°	0%	1 mph2 km/h from W, gusts 4 mph6 km/h	92%	6%	0
Mon 7a	Sunny	37°3° (likely 37°3° to 42°6°)	37°3°	0%	2 mph3 km/h from W, gusts 3 mph5 km/h	92%	12%	0

Days ahead

Tap a day for its hours and the official wording.

Today, Oct 24. Cloudy. High 62°17°, low 35°2°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Partly sunny, 38°3°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 61°16°
  Dry
3. Evening
  6 PM–midnight
  Clear, 47°8°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 37°3°
  Dry
Official NWS forecast
Today: Areas of frost before 9am. Mostly sunny. High near 62, with temperatures falling to around 59 in the afternoon. Northwest wind around 3 mph.
Tonight: Patchy frost after 2am. Clear. Low around 35, with temperatures rising to around 37 overnight. Northwest wind around 1 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
58°14°–62°17°
Low, likely
31°−1°–36°2°
Wind
7 mph11 km/h, gusts 16 mph26 km/h
UV peak
4
Tomorrow, Oct 25. Sunny. High 66°19°, low 37°3°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 36°2°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 65°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 48°9°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 39°4°
  Dry
Official NWS forecast
Day: Areas of frost before 9am. Sunny. High near 66, with temperatures falling to around 61 in the afternoon. West wind around 2 mph.
Night: Patchy frost after 3am. Clear. Low around 37, with temperatures rising to around 39 overnight. West wind around 1 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
64°18°–67°19°
Low, likely
34°1°–38°3°
Wind
6 mph10 km/h, gusts 13 mph21 km/h
UV peak
4
Monday, Oct 26. Sunny. High 68°20°, low 42°6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 42°5°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 67°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 55°13°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 48°9°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Patchy frost before 9am. Sunny. High near 68, with temperatures falling to around 66 in the afternoon. West wind 1 to 6 mph.
Night: Clear. Low around 42, with temperatures rising to around 44 overnight.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
65°18°–69°21°
Low, likely
39°4°–42°6°
Wind
8 mph14 km/h, gusts 16 mph26 km/h
UV peak
4
Tuesday, Oct 27. Mostly sunny. High 58°14°, low 32°0°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 45°7°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 56°13°
  Dry
3. Evening
  6 PM–midnight
  Clear, 43°6°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 37°3°
  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 32.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
55°13°–58°14°
Low, likely
32°0°–42°6°
Wind
10 mph16 km/h, gusts 23 mph37 km/h
UV peak
4
Wednesday, Oct 28. Mostly sunny. High 58°14°, low 41°5°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 38°3°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 56°13°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 45°7°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 43°6°
  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 41.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
54°12°–58°14°
Low, likely
35°2°–41°5°
Wind
7 mph11 km/h, gusts 15 mph24 km/h
UV peak
4
Thursday, Oct 29. Partly sunny. High 64°18°, low 48°9°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 44°7°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 62°17°
  Dry
3. Evening
  6 PM–midnight
  Clear, 53°12°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 50°10°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 64.
Night: Mostly clear, with a low around 48.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
61°16°–64°18°
Low, likely
41°5°–48°9°
Wind
11 mph17 km/h, gusts 33 mph53 km/h
UV peak
4
Friday, Oct 30. Partly sunny. High 67°19°, low 44°7°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 49°9°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 68°20°
  Dry
3. Evening
  6 PM–midnight
  Clear, 56°13°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 48°9°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 67.
Night: Partly cloudy, with a low around 44.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
67°19°–69°21°
Low, likely
44°7°–50°10°
Wind
10 mph16 km/h, gusts 26 mph42 km/h
UV peak
4
Saturday, Oct 31. Cloudy. High 65°18°, low 45°7°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 47°8°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 65°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 50°10°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 47°8°
  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
55°13°–71°22°
Low, likely
38°3°–48°9°
Wind
12 mph20 km/h, gusts 25 mph40 km/h
UV peak
4
Sunday, Nov 1. Cloudy. High 64°18°, low 48°9°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Partly sunny, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 63°17°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 53°12°
  20% chance
4. Overnight
  midnight–6 AM
  Mostly clear, 49°10°
  30% 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
57°14°–67°19°
Low, likely
36°2°–53°12°
Wind
9 mph14 km/h, gusts 23 mph37 km/h
UV peak
4
Monday, Nov 2. Cloudy. High 62°17°, low 49°9°. Rain 0.07 in1.8 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 53°12°
  30% chance
2. Afternoon
  noon–6 PM
  Cloudy, 63°17°
  20% chance · 0.02 in0.5 mm
3. Evening
  6 PM–midnight
  Cloudy, 54°12°
  30% chance · 0.02 in0.5 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°–66°19°
Low, likely
37°3°–56°13°
Wind
9 mph14 km/h, gusts 21 mph33 km/h
UV peak
2

10 days15 days30 days

The outlook

Today
Dry, high 62°, low 35°.
Tomorrow
Dry, high 66°, low 37°, warming up.
Monday
Dry, high 68°, low 42°.
Rest of week
Mostly dry, highs 58–67°.

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

Connecticut River at Middle Haddam

13 mi

Below flood stage

Level: 1.4 ft

Forecast peak 3.8 ft Sat 11 AM

Reading from Sat 6:45 AM · NWS gauge page

Long Island Sound near New London Harbor (IN MLLW)

18 mi

Below flood stage

Level: 4.0 ft

Forecast peak 4.3 ft Sat 9 AM

Reading from Sat 7:30 AM · NWS gauge page

Yantic River at Yantic

21 mi

Below flood stage

Level: 2.0 ft
Flow: 89 cfs

Forecast peak 2.0 ft Sat 2 PM

Reading from Sat 7:45 AM · NWS gauge page

Lake Hammonasset above Lake Hammonasset

9.0 mi

Level: 0.2 ft

Reading from Sat 7:37 AM · NWS gauge page

Sun & moon

Sun

Daylight: 10 h 43 min; Losing 2 min 35 s a day; shortest Dec 21, 1 h 32 min less
Golden hour: 5:16–6:12 PM; Morning 6:54–7:50 AM
Blue hour: 6:12–6:23 PM; Morning 6:43–6:54 AM; first light 6:43 AM

Stars tonight? Fair

Clear 6:23 PM–6:44 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

96% lit · growing

Today: sets 5:22 AM · rises 4:52 PM
Full moon: Oct 26
New moon: Nov 9

Looking northwest from Deep River Center. The highest point on the skyline is about 10,200 ft, 56 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

Deep River Center, CT weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Monday

Rest of week

What changed since yesterday

Radar

Rivers

Connecticut River at Middle Haddam

Long Island Sound near New London Harbor (IN MLLW)

Yantic River at Yantic

Lake Hammonasset above Lake Hammonasset

Sun & moon

Sun

Stars tonight? Fair

Moon