Molloy Cercom, New York climate: Climate normals at a NOAA weather station
Molloy Cercom's normal year runs from 26°F January nights to 80°F August afternoons, with 49.9 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 11.7°C, January lows of −3°C, August highs of 27°C, 1,267 mm of precipitation a year.
- NOAA stationMolloy Cercom
- Station IDUSC00302151
- Location40.72°N 73.09°W
- Elevation5 ft (2 m)
On October 23, the normal high in Molloy Cercom is 61°F and the normal low 47°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Molloy Cercom.
- Jan 39° 26°
- Feb 40° 27°
- Mar 46° 33°
- Apr 56° 43°
- May 64° 52°
- Jun 74° 63°
- Jul 80° 70°
- Aug 80° 69°
- Sep 73° 61°
- Oct 63° 50°
- Nov 53° 40°
- Dec 44° 32°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like at Molloy Cercom each month?
August is the warmest month, with normal highs of 80°F; January the coldest, with normal lows of 26°F. The most precipitation falls in August (5.81 in), the least in November (3.03 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 39°F | 26°F | 32.4°F | 3.49 | – | <1 | 21 | 9 h 30 min |
| February | 40°F | 27°F | 33.4°F | 4.58 | – | <1 | 18 | 10 h 40 min |
| March | 46°F | 33°F | 39.7°F | 4.44 | – | <1 | 15 | 11 h 50 min |
| April | 56°F | 43°F | 49.4°F | 3.82 | – | <1 | 2 | 13 h 20 min |
| May | 64°F | 52°F | 57.9°F | 3.50 | – | <1 | <1 | 14 h 30 min |
| June | 74°F | 63°F | 68.3°F | 3.70 | – | <1 | <1 | 15 h |
| July | 80°F | 70°F | 74.6°F | 4.65 | – | 3 | <1 | 14 h 50 min |
| August | 80°F | 69°F | 74.7°F | 5.81 | – | 2 | <1 | 13 h 50 min |
| September | 73°F | 61°F | 67.0°F | 4.35 | – | 2 | <1 | 12 h 30 min |
| October | 63°F | 50°F | 56.1°F | 3.56 | – | <1 | <1 | 11 h 10 min |
| November | 53°F | 40°F | 46.3°F | 3.03 | – | <1 | 6 | 10 h |
| December | 44°F | 32°F | 37.7°F | 4.94 | – | <1 | 14 | 9 h 20 min |
| Year (annual) | 59°F | 47°F | 53.1°F | 49.87 | – | 7 | 76 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 4°C | −3°C | 0.2°C | 89 mm |
| February | 4°C | −3°C | 0.8°C | 116 mm |
| March | 8°C | 1°C | 4.3°C | 113 mm |
| April | 13°C | 6°C | 9.7°C | 97 mm |
| May | 18°C | 11°C | 14.4°C | 89 mm |
| June | 23°C | 17°C | 20.2°C | 94 mm |
| July | 26°C | 21°C | 23.7°C | 118 mm |
| August | 27°C | 21°C | 23.7°C | 148 mm |
| September | 23°C | 16°C | 19.4°C | 110 mm |
| October | 17°C | 10°C | 13.4°C | 90 mm |
| November | 11°C | 4°C | 7.9°C | 77 mm |
| December | 7°C | 0°C | 3.2°C | 125 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Islip (5 miles away), gets 32 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00302151; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
Which months are mildest at Molloy Cercom?
Normal highs sit between 65°F and 85°F in June, July, August and September.
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00302151.
When is the last frost at Molloy Cercom?
In Molloy Cercom, the last spring frost (32°F) comes after April 4 in half of years and after April 21 in one year in ten; the first autumn frost comes before November 11 in half of years and before October 27 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- April 41 year in 10 after April 21; 9 in 10 after March 22
- First autumn frost, half of years before
- November 111 year in 10 before October 27; 9 in 10 before November 29
NOAA puts the median frost-free season at 219 days, and the season without a hard freeze (28°F) at 246 days.
A hard freeze (28°F) comes after March 24 in half of springs and before November 24 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Molloy Cercom in zone 7b in ZIP code 11796, the nearest ZIP area.
Frost dates for every NOAA station in New York · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00302151; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get at Molloy Cercom?
In a normal year in Molloy Cercom, 7 days a year reach 90°F (1 of them 100°F or more) and 76 nights fall to 32°F or colder.
- Days at 90°F or more
- 7a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 76a normal year
- Days that stay below freezing
- 14high of 32°F or less
Source: NOAA NCEI 1991-2020 annual normals, station USC00302151.
How sunny is it at Molloy Cercom?
Over a year 75% of the sunlight that would reach the ground under clear skies gets through the clouds at Molloy Cercom, 4.0 kWh per square metre a day. July is the sunniest month (82%) and December the cloudiest (66%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 67% | 1.9 |
| February | 70% | 2.8 |
| March | 71% | 3.8 |
| April | 73% | 5.0 |
| May | 73% | 5.6 |
| June | 78% | 6.1 |
| July | 82% | 6.2 |
| August | 81% | 5.5 |
| September | 79% | 4.5 |
| October | 72% | 3.0 |
| November | 72% | 2.1 |
| December | 66% | 1.6 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How many heating and cooling degree days does Molloy Cercom record?
A normal year at Molloy Cercom brings 5,148 heating degree days, 4% fewer than the median U.S. place (5,373), and 853 cooling degree days, 6% fewer than the median (908). Six months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 3,151 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,009 | 0 |
| February | 885 | 0 |
| March | 784 | 0 |
| April | 467 | 1 |
| May | 229 | 9 |
| June | 30 | 129 |
| July | 0 | 299 |
| August | 1 | 302 |
| September | 50 | 109 |
| October | 282 | 5 |
| November | 564 | 1 |
| December | 848 | 0 |
| Year (annual) | 5,148 | 853 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00302151. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
How does Molloy Cercom's climate compare?
Molloy Cercom is warmer than 121 of the 131 places with their own NOAA record in New York, and wetter than 104. Across the 7,247 U.S. stations with normals, its annual mean of 53.1°F is warmer than 54%.
In the Köppen classification computed from these normals, Molloy Cercom is Cfa: temperate, no dry season, hot summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Which places near Molloy Cercom share this climate record?
13 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Bay Shore, NY31,275 people · 8 mi W
- Sayville, NY15,593 people · 2 mi N
- East Islip, NY13,687 people · 5 mi W
- Patchogue, NY12,447 people · 5 mi NE
- Bayport, NY8,831 people · 2 mi NE
- Oakdale, NY7,171 people · 3 mi NW
- West Sayville, NY4,944 people · 1 mi NW
- Blue Point, NY4,622 people · 4 mi NE
- Great River, NY1,880 people · 4 mi W
- Fire Island, NY445 people · 8 mi SW
- Captree, NY271 people · 10 mi SW
- Ocean Beach, NY175 people · 6 mi SW
- Saltaire, NY109 people · 8 mi SW
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Molloy Cercom's climate
What is the coldest month at Molloy Cercom?
January, with a normal high of 39°F and a normal low of 26°F. The warmest is August (80°F by day, 69°F at night).
Does it snow at Molloy Cercom?
Yes. NOAA publishes no 1991-2020 snowfall normal for the station; the nearest record that keeps one, Islip (5 miles away), records 32 inches of snow in a normal year.
What is the rainiest month at Molloy Cercom?
August, with 5.81 in of precipitation in a normal year; the driest is November with 3.03 in.
What plant hardiness zone is Molloy Cercom in?
The USDA's 2023 map puts Molloy Cercom in zone 7b in ZIP code 11796, the nearest ZIP area.
How late can frost come at Molloy Cercom?
In half of years the last 32°F night comes after April 4; in one year in ten it comes after April 21. Waiting until April 21 leaves about a one-in-ten chance of a later frost.
Nearby and next
- New York climateThe statewide normals and every place in the state
- Islip, NY5 miles from this station, 53.1°F a year
- Shirley, NY14 miles from this station, 52.4°F a year
- Mount Sinai, NY15 miles from this station, 54.7°F a year
- Upton Cooperative - Weather Office New York, NY16 miles from this station, 51.2°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made