Observed 11:30 AM EDT at KHPN

Old Greenwich, CT weather

Sunny and 55°13°, jacket by 7 PM.

Forecasts agree

Now 55°13°

Sunny

Wind: Calm; Up to 5 mph8 km/h through 11 PM
Dew point: 38°3°; Comfortable
UV index: 2Low; Moderate 12–2 PM · peak 3
Air today: 50Good; EPA forecast · PM2.5 (fine particles)
Pressure: 30.56 inHg1035 hPa; Steady over the last 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

About the same as this time yesterday (53°12° then, 54°12° now)

Good hours for

High 61°16° today at 4 PM
Low 42°6° tomorrow at 8 AM
Above 50°10° tomorrow by 10 AM

This afternoonUp to 61°16° by 4 PM · Mostly cloudy
TonightDown to 43°6° by 4 AM · Clear
Tomorrow morningUp to 57°14° by 11 AM · Clear
Tomorrow afternoonUp to 65°18° by 4 PM · Clear
Tomorrow nightDown to 43°6° by 5 AM · Clear
Monday morningUp to 54°12° by 10 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 11a	Mostly cloudy	55°13° (likely 53°12° to 55°13°)	55°13°	0%	3 mph5 km/h from N, gusts 6 mph10 km/h	53%	69%	2
Sat 12p	Cloudy	57°14° (likely 56°13° to 58°14°)	57°14°	0%	3 mph5 km/h from W, gusts 6 mph9 km/h	49%	75%	3
Sat 1p	Cloudy	58°14° (likely 57°14° to 60°16°)	58°14°	0%	3 mph5 km/h from SW, gusts 7 mph11 km/h	49%	75%	3
Sat 2p	Cloudy	60°16° (likely 58°14° to 61°16°)	60°16°	0%	5 mph8 km/h from SW, gusts 8 mph13 km/h	42%	59%	2
Sat 3p	Mostly cloudy	60°16° (likely 59°15° to 61°16°)	60°16°	0%	5 mph8 km/h from SW, gusts 9 mph14 km/h	41%	57%	2
Sat 4p	Mostly cloudy	61°16° (likely 60°16° to 61°16°)	61°16°	0%	3 mph5 km/h from W, gusts 8 mph12 km/h	39%	49%	1
Sat 5p	Partly sunny	60°16° (likely 58°14° to 60°16°)	60°16°	0%	3 mph5 km/h from W, gusts 7 mph11 km/h	42%	46%	0
Sat 6p	Mostly clear	58°14° (likely 55°13° to 58°14°)	58°14°	0%	3 mph5 km/h from W, gusts 6 mph10 km/h	47%	45%	0
Sat 7p	Mostly clear	55°13° (likely 52°11° to 55°13°)	55°13°	0%	2 mph3 km/h from W, gusts 4 mph7 km/h	55%	22%	0
Sat 8p	Clear	53°12° (likely 48°9° to 53°12°)	53°12°	0%	2 mph3 km/h from W, gusts 5 mph8 km/h	59%	1%	0
Sat 9p	Clear	51°11° (likely 46°8° to 52°11°)	51°11°	0%	2 mph3 km/h from W, gusts 4 mph7 km/h	61%	4%	0
Sat 10p	Clear	49°9° (likely 44°7° to 50°10°)	49°9°	0%	2 mph3 km/h from NW, gusts 4 mph6 km/h	66%	2%	0
Sat 11p	Clear	48°9° (likely 44°7° to 49°9°)	48°9°	0%	2 mph3 km/h from NW, gusts 4 mph7 km/h	68%	0%	0
Sun 12a	Clear	46°8° (likely 44°7° to 47°8°)	46°8°	0%	2 mph3 km/h from NW, gusts 5 mph7 km/h	73%	0%	0
Sun 1a	Clear	45°7° (likely 41°5° to 46°8°)	45°7°	0%	3 mph5 km/h from NW, gusts 5 mph8 km/h	76%	0%	0
Sun 2a	Clear	45°7° (likely 39°4° to 45°7°)	45°7°	0%	3 mph5 km/h from NW, gusts 5 mph8 km/h	73%	0%	0
Sun 3a	Clear	44°7° (likely 38°3° to 44°7°)	44°7°	0%	3 mph5 km/h from NW, gusts 5 mph8 km/h	76%	0%	0
Sun 4a	Clear	43°6° (likely 37°3° to 43°6°)	43°6°	0%	3 mph5 km/h from NW, gusts 6 mph9 km/h	76%	0%	0
Sun 5a	Clear	43°6° (likely 38°3° to 43°6°)	43°6°	0%	3 mph5 km/h from NW, gusts 6 mph9 km/h	76%	0%	0
Sun 6a	Clear	43°6° (likely 37°3° to 43°6°)	43°6°	0%	3 mph5 km/h from NW, gusts 5 mph9 km/h	76%	0%	0
Sun 7a	Sunny	43°6° (likely 37°3° to 43°6°)	43°6°	0%	3 mph5 km/h from NW, gusts 6 mph10 km/h	76%	0%	0
Sun 8a	Sunny	42°6° (likely 38°3° to 43°6°)	42°6°	0%	3 mph5 km/h from NW, gusts 5 mph8 km/h	82%	0%	0
Sun 9a	Sunny	47°8° (likely 44°7° to 47°8°)	47°8°	0%	3 mph5 km/h from NW, gusts 6 mph10 km/h	71%	0%	1
Sun 10a	Sunny	53°12° (likely 51°11° to 54°12°)	53°12°	0%	2 mph3 km/h from NW, gusts 5 mph8 km/h	59%	0%	2
Sun 11a	Sunny	57°14° (likely 56°13° to 59°15°)	57°14°	0%	2 mph3 km/h from NW, gusts 5 mph8 km/h	53%	0%	3
Sun 12p	Sunny	60°16° (likely 59°15° to 62°17°)	60°16°	0%	2 mph3 km/h from W, gusts 6 mph10 km/h	46%	0%	4
Sun 1p	Sunny	63°17° (likely 61°16° to 64°18°)	63°17°	0%	3 mph5 km/h from W, gusts 8 mph12 km/h	41%	0%	4
Sun 2p	Sunny	63°17° (likely 63°17° to 65°18°)	63°17°	0%	3 mph5 km/h from W, gusts 8 mph13 km/h	41%	0%	4
Sun 3p	Sunny	64°18° (likely 63°17° to 65°18°)	64°18°	0%	3 mph5 km/h from SW, gusts 7 mph12 km/h	40%	0%	3
Sun 4p	Sunny	65°18° (likely 63°17° to 65°18°)	65°18°	0%	3 mph5 km/h from SW, gusts 8 mph12 km/h	38%	0%	2
Sun 5p	Sunny	63°17° (likely 61°16° to 63°17°)	63°17°	0%	3 mph5 km/h from SW, gusts 7 mph12 km/h	41%	0%	1
Sun 6p	Clear	60°16° (likely 57°14° to 60°16°)	60°16°	0%	3 mph5 km/h from SW, gusts 6 mph10 km/h	47%	0%	0
Sun 7p	Clear	58°14° (likely 55°13° to 58°14°)	58°14°	0%	3 mph5 km/h from SW, gusts 9 mph14 km/h	53%	0%	0
Sun 8p	Clear	54°12° (likely 53°12° to 55°13°)	54°12°	0%	3 mph5 km/h from SW, gusts 11 mph17 km/h	64%	0%	0
Sun 9p	Clear	52°11° (likely 51°11° to 53°12°)	52°11°	0%	3 mph5 km/h from SW, gusts 9 mph14 km/h	69%	0%	0
Sun 10p	Clear	50°10° (likely 49°9° to 52°11°)	50°10°	0%	3 mph5 km/h from W, gusts 8 mph13 km/h	74%	0%	0
Sun 11p	Clear	49°9° (likely 46°8° to 51°11°)	49°9°	0%	3 mph5 km/h from W, gusts 11 mph17 km/h	74%	0%	0
Mon 12a	Clear	48°9° (likely 45°7° to 50°10°)	48°9°	0%	3 mph5 km/h from W, gusts 10 mph17 km/h	77%	0%	0
Mon 1a	Clear	46°8° (likely 43°6° to 49°9°)	44°7°	0%	5 mph8 km/h from W, gusts 11 mph18 km/h	83%	0%	0
Mon 2a	Clear	45°7° (likely 42°6° to 48°9°)	43°6°	0%	5 mph8 km/h from W, gusts 10 mph17 km/h	86%	0%	0
Mon 3a	Clear	44°7° (likely 41°5° to 47°8°)	41°5°	0%	5 mph8 km/h from W, gusts 11 mph18 km/h	89%	0%	0
Mon 4a	Clear	44°7° (likely 40°4° to 47°8°)	41°5°	0%	6 mph10 km/h from W, gusts 11 mph18 km/h	86%	0%	0
Mon 5a	Clear	43°6° (likely 40°4° to 47°8°)	39°4°	0%	6 mph10 km/h from W, gusts 11 mph18 km/h	89%	1%	0
Mon 6a	Clear	42°6° (likely 39°4° to 46°8°)	38°3°	0%	6 mph10 km/h from W, gusts 11 mph17 km/h	93%	2%	0
Mon 7a	Sunny	42°6° (likely 39°4° to 46°8°)	38°3°	0%	6 mph10 km/h from W, gusts 10 mph15 km/h	93%	14%	0
Mon 8a	Sunny	44°7° (likely 39°4° to 47°8°)	41°5°	0%	6 mph10 km/h from W, gusts 9 mph15 km/h	86%	11%	0
Mon 9a	Sunny	48°9° (likely 44°7° to 51°11°)	45°7°	0%	6 mph10 km/h from W, gusts 7 mph12 km/h	77%	6%	1
Mon 10a	Sunny	54°12° (likely 51°11° to 56°13°)	54°12°	0%	5 mph8 km/h from W, gusts 9 mph14 km/h	64%	11%	2

Days ahead

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

Today, Oct 24. Cloudy. High 61°16°, low 41°5°. Typical 60°16° / 43°6°. Dry. Forecasts agree.
1. Afternoon
  noon–6 PM
  Mostly cloudy, 61°16°
  Dry
2. Evening
  6 PM–midnight
  Clear, 53°12°
  Dry
3. Overnight
  midnight–6 AM
  Clear, 43°6°
  Dry
Official NWS forecast
Today: Partly sunny, with a high near 61. West wind around 5 mph.
Tonight: Mostly clear. Low around 41, with temperatures rising to around 43 overnight. Northwest wind around 3 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
60°16°–61°16°
Low, likely
34°1°–41°5°
Typical high / low
60°16° / 43°6°
Wind
6 mph10 km/h, gusts 12 mph19 km/h
UV peak
4
Tomorrow, Oct 25. Sunny. High 65°18°, low 42°6°. Typical 60°16° / 42°6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 42°6°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 65°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 54°12°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 43°6°
  Dry
Official NWS forecast
Day: Sunny. High near 65, with temperatures falling to around 63 in the afternoon. West wind around 3 mph.
Night: Clear, with a low around 42. West wind around 6 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
63°17°–65°18°
Low, likely
37°3°–42°6°
Typical high / low
60°16° / 42°6°
Wind
9 mph14 km/h, gusts 16 mph25 km/h
UV peak
4
Monday, Oct 26. Sunny. High 68°20°, low 47°8°. Typical 59°15° / 42°6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 44°7°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 68°20°
  Dry
3. Evening
  6 PM–midnight
  Clear, 58°14°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 50°10°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 68. West wind around 6 mph.
Night: Mostly clear. Low around 47, with temperatures rising to around 49 overnight.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
66°19°–69°21°
Low, likely
39°4°–47°8°
Typical high / low
59°15° / 42°6°
Wind
7 mph12 km/h, gusts 22 mph36 km/h
UV peak
4
Tuesday, Oct 27. Sunny. High 58°14°, low 41°5°. Typical 59°15° / 42°6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 47°8°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 59°15°
  Dry
3. Evening
  6 PM–midnight
  Clear, 48°9°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 40°5°
  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 41.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
57°14°–60°16°
Low, likely
41°5°–47°8°
Typical high / low
59°15° / 42°6°
Wind
11 mph17 km/h, gusts 26 mph41 km/h
UV peak
4
Wednesday, Oct 28. Partly sunny. High 58°14°, low 50°10°. Typical 59°15° / 42°6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 40°4°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 57°14°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 51°10°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 48°9°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 58.
Night: Partly cloudy, with a low around 50.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
55°13°–59°15°
Low, likely
35°2°–50°10°
Typical high / low
59°15° / 42°6°
Wind
8 mph13 km/h, gusts 15 mph24 km/h
UV peak
4
Thursday, Oct 29. Partly sunny. High 65°18°, low 53°12°. Typical 58°14° / 41°5°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 47°9°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 65°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 57°14°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 51°11°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 65.
Night: Partly cloudy, with a low around 53.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
63°17°–66°19°
Low, likely
44°7°–53°12°
Typical high / low
58°14° / 41°5°
Wind
10 mph16 km/h, gusts 28 mph45 km/h
UV peak
4
Friday, Oct 30. Partly sunny. High 67°19°, low 50°10°. Typical 58°14° / 41°5°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 50°10°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 70°21°
  Dry
3. Evening
  6 PM–midnight
  Clear, 59°15°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 50°10°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 67.
Night: Mostly clear, with a low around 50.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
67°19°–72°22°
Low, likely
46°8°–52°11°
Typical high / low
58°14° / 41°5°
Wind
13 mph21 km/h, gusts 28 mph45 km/h
UV peak
4
Saturday, Oct 31. Cloudy. High 66°19°, low 50°10°. Typical 58°14° / 41°5°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 49°10°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 57°14°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 51°10°
  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
59°15°–71°22°
Low, likely
46°8°–52°11°
Typical high / low
58°14° / 41°5°
Wind
12 mph20 km/h, gusts 28 mph45 km/h
UV peak
3
Sunday, Nov 1. Cloudy. High 64°18°, low 51°11°. Typical 57°14° / 40°4°. Rain 0.01 in0.3 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 52°11°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 64°18°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 59°15°
  20% chance
4. Overnight
  midnight–6 AM
  Cloudy, 53°12°
  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
54°12°–69°21°
Low, likely
40°4°–56°13°
Typical high / low
57°14° / 40°4°
Wind
11 mph17 km/h, gusts 22 mph35 km/h
UV peak
4
Monday, Nov 2. Cloudy. High 62°17°, low 53°12°. Typical 57°14° / 40°4°. Rain 0.08 in2 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 56°13°
  30% chance
2. Afternoon
  noon–6 PM
  Cloudy, 64°18°
  20% chance
3. Evening
  6 PM–midnight
  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
53°12°–68°20°
Low, likely
42°6°–59°15°
Typical high / low
57°14° / 40°4°
Wind
10 mph16 km/h, gusts 16 mph26 km/h
UV peak
2

10 days15 days30 days

The outlook

Today
Dry, high 61°, low 41°.
Tomorrow
Dry, high 65°, low 42°, warming up.
Monday
Dry, high 68°, low 47°, warming up.
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

Little Neck Bay at Kings Point (IN MLLW)

18 mi

Below flood stage

Level: 9.1 ft

Forecast peak 10.2 ft Tue 12 PM

Reading from Sat 10:30 AM · NWS gauge page

Long Island Sound at Stamford (IN MLLW)

1.7 mi

Below flood stage

Level: 9.2 ft

Reading from Sat 10:30 AM · NWS gauge page

Rippowam River at Stamford

3.3 mi

Below flood stage

Level: 1.5 ft

Reading from Sat 9:45 AM · NWS gauge page

Long Island Sound at Rye (IN MLLW)

6.8 mi

Below flood stage

Level: 9.3 ft

Reading from Sat 10:42 AM · NWS gauge page

For your home

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

Heating this week

About 74% less heating than a typical week.

This week 26Typical 102

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 18
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 3 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 38°F).

Open the windows?

Today, 2:00 PM–5:00 PM

Good stretch to open the windows.

Is this typical?

WESTCHESTER CO AP · 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).

−7°−4°SunOct 18
−2°−1°MonOct 19
—TueOct 20
±0°WedOct 21
+1°ThuOct 22
−1°FriOct 23
—SatOct 24

Old Greenwich weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 10 h 44 min; Losing 2 min 30 s a day; shortest Dec 21, 1 h 31 min less
Golden hour: 5:22–6:17 PM; Morning 6:58–7:54 AM
Blue hour: 6:17–6:28 PM; Morning 6:47–6:58 AM; first light 6:47 AM

Stars tonight? Fair

Clear 7 PM–6:48 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

97% lit · growing

Today: sets 5:26 AM · rises 4:57 PM
Full moon: Oct 26
New moon: Nov 9

Looking southeast from Old Greenwich. The highest point on the skyline is about 700 ft, 19 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.

Old Greenwich, CT weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Monday

Rest of week

What changed since yesterday

Radar

Rivers

Little Neck Bay at Kings Point (IN MLLW)

Long Island Sound at Stamford (IN MLLW)

Rippowam River at Stamford

Long Island Sound at Rye (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? Fair

Moon