Westchester County Airport, New York climate: Climate normals at a NOAA weather station
Westchester County Airport's normal year runs from 22°F January nights to 83°F July afternoons, with 47.8 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 11.1°C, January lows of −5°C, July highs of 28°C, 1,213 mm of precipitation a year.
- NOAA stationWestchester County Airport
- Station IDUSW00094745
- Location41.07°N 73.71°W
- Elevation379 ft (116 m)
On October 23, the normal high in Westchester County Airport is 61°F and the normal low 43°F, and the chance of measurable rain or snow is 33%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Westchester County Airport.
- Jan 37° 22°
- Feb 40° 24°
- Mar 48° 31°
- Apr 59° 40°
- May 69° 50°
- Jun 78° 59°
- Jul 83° 65°
- Aug 81° 64°
- Sep 74° 57°
- Oct 63° 46°
- Nov 52° 36°
- Dec 42° 28°
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 Westchester County Airport each month?
July is the warmest month, with normal highs of 83°F; January the coldest, with normal lows of 22°F. The most precipitation falls in September (4.94 in), the least in February (2.53 in).
Each month has its own page with the day-by-day normals, the month's records and its recent years:
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 37°F | 22°F | 29.8°F | 3.20 | 10 | <1 | 26 | 9 h 30 min |
| February | 40°F | 24°F | 31.9°F | 2.53 | 9 | <1 | 23 | 10 h 40 min |
| March | 48°F | 31°F | 39.1°F | 4.11 | 11 | <1 | 19 | 11 h 50 min |
| April | 59°F | 40°F | 49.6°F | 4.20 | 11 | <1 | 4 | 13 h 20 min |
| May | 69°F | 50°F | 59.5°F | 3.94 | 12 | <1 | <1 | 14 h 30 min |
| June | 78°F | 59°F | 68.6°F | 4.25 | 11 | 2 | <1 | 15 h 10 min |
| July | 83°F | 65°F | 74.0°F | 4.07 | 10 | 5 | <1 | 14 h 50 min |
| August | 81°F | 64°F | 72.4°F | 4.36 | 11 | 2 | <1 | 13 h 50 min |
| September | 74°F | 57°F | 65.4°F | 4.94 | 10 | 1 | <1 | 12 h 30 min |
| October | 63°F | 46°F | 54.2°F | 4.33 | 10 | <1 | 1 | 11 h 10 min |
| November | 52°F | 36°F | 44.2°F | 3.64 | 10 | <1 | 10 | 10 h |
| December | 42°F | 28°F | 35.1°F | 4.18 | 11 | <1 | 22 | 9 h 10 min |
| Year (annual) | 61°F | 43°F | 52.0°F | 47.75 | 124 | 10 | 105 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 3°C | −5°C | −1.2°C | 81 mm |
| February | 5°C | −5°C | −0.1°C | 64 mm |
| March | 9°C | −1°C | 3.9°C | 104 mm |
| April | 15°C | 5°C | 9.8°C | 107 mm |
| May | 21°C | 10°C | 15.3°C | 100 mm |
| June | 26°C | 15°C | 20.3°C | 108 mm |
| July | 28°C | 18°C | 23.3°C | 103 mm |
| August | 27°C | 18°C | 22.4°C | 111 mm |
| September | 23°C | 14°C | 18.6°C | 125 mm |
| October | 17°C | 8°C | 12.3°C | 110 mm |
| November | 11°C | 2°C | 6.8°C | 92 mm |
| December | 6°C | −2°C | 1.7°C | 106 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Dobbs Ferry (8 miles away), gets 33 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USW00094745; 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 Westchester County Airport?
Normal highs sit between 65°F and 85°F in May, June, July, August and September. Of those, July has the fewest days with rain (10).
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 USW00094745.
When is the last frost at Westchester County Airport?
In Westchester County Airport, the last spring frost (32°F) comes after April 12 in half of years and after April 27 in one year in ten; the first autumn frost comes before October 31 in half of years and before October 15 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 121 year in 10 after April 27; 9 in 10 after April 1
- First autumn frost, half of years before
- October 311 year in 10 before October 15; 9 in 10 before November 14
NOAA puts the median frost-free season at 200 days, and the season without a hard freeze (28°F) at 224 days.
A hard freeze (28°F) comes after April 1 in half of springs and before November 13 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Westchester County Airport in zone 7a in ZIP code 10577, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, the station is in zone 7a: the coldest night of a typical year reaches 4°F (22 complete years).
Frost dates for every NOAA station in New York · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USW00094745; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. 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 Westchester County Airport?
In a normal year in Westchester County Airport, 10 days a year reach 90°F, 105 nights fall to 32°F or colder and 124 days bring measurable precipitation.
- Days at 90°F or more
- 10a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 105a normal year
- Days that stay below freezing
- 23high of 32°F or less
- Days with 0.01 inch of precipitation
- 124a normal year
The highest temperature in this station's record (since 1948) is 102°F, on July 4, 1966; the lowest is −10°F, on January 22, 1961.
The wettest calendar year on that record is 1983, with 74.15 in; the snowiest season is 1960–61, with 84.2 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USW00094745; records: ACIS (NOAA Regional Climate Centers), station USW00094745. Records use complete months only; a month missing more than three days is left out.
How humid and windy is it at Westchester County Airport, and how clear are the skies?
The summer (June-August) dew point averages 62°F. The muggiest month is July, with an average dew point of 64°F; the driest air comes in January (17°F). February is the windiest month (9.4 mph on average).
| Month | Dew point | Humidity | Afternoon humidity | Wind | Clear or few clouds | Overcast |
|---|---|---|---|---|---|---|
| January | 17°F | 59% | 47% | 8.7 mph | – | – |
| February | 21°F | 59% | 47% | 9.4 mph | – | – |
| March | 29°F | 58% | 45% | 8.9 mph | – | – |
| April | 40°F | 60% | 45% | 7.9 mph | – | – |
| May | 53°F | 69% | 53% | 6.6 mph | – | – |
| June | 61°F | 69% | 52% | 6.1 mph | – | – |
| July | 64°F | 72% | 55% | 5.7 mph | – | – |
| August | 60°F | 72% | 54% | 6.0 mph | – | – |
| September | 52°F | 74% | 57% | 6.4 mph | – | – |
| October | 39°F | 67% | 53% | 7.7 mph | – | – |
| November | 30°F | 66% | 55% | 8.2 mph | – | – |
| December | 22°F | 65% | 54% | 8.8 mph | – | – |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00094745. Monthly averages of all hours; afternoon humidity at 3 p.m. local standard time; sky as the share of hours NOAA's observations rate clear or few clouds (a dash where NOAA publishes no sky value).
How sunny is it at Westchester County Airport?
Over a year 72% of the sunlight that would reach the ground under clear skies gets through the clouds at Westchester County Airport, 3.9 kWh per square metre a day. July is the sunniest month (79%) and December the cloudiest (65%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 68% | 1.8 |
| February | 70% | 2.7 |
| March | 68% | 3.7 |
| April | 69% | 4.8 |
| May | 69% | 5.4 |
| June | 74% | 5.9 |
| July | 79% | 6.0 |
| August | 78% | 5.3 |
| September | 77% | 4.3 |
| October | 70% | 2.9 |
| November | 70% | 2.0 |
| December | 65% | 1.5 |
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 Westchester County Airport record?
A normal year at Westchester County Airport brings 5,492 heating degree days, 2% more than the median U.S. place (5,373), and 787 cooling degree days, 13% fewer than the median (908). Seven months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 3,082 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,090 | 0 |
| February | 927 | 0 |
| March | 805 | 0 |
| April | 465 | 4 |
| May | 201 | 30 |
| June | 35 | 142 |
| July | 2 | 282 |
| August | 4 | 233 |
| September | 74 | 88 |
| October | 341 | 8 |
| November | 624 | 0 |
| December | 925 | 0 |
| Year (annual) | 5,492 | 787 |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00094745. 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.
Have recent years at Westchester County Airport been warmer than normal?
2024 averaged 54.5°F, 2.5°F above the 1991-2020 normal of 52.0°F. 4 of the 4 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 53.2°F | +1.2°F | – |
| 2022 | 53.2°F | +1.2°F | – |
| 2023 | 54.4°F | +2.4°F | – |
| 2024 | 54.5°F | +2.5°F | 47.54 |
Over 53 complete years from 1953 to 2025, the station's annual mean temperature rose at a fitted 5.4°F per century (+0.30°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USW00094745; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Westchester County Airport's climate compare?
Westchester County Airport is warmer than 116 of the 131 places with their own NOAA record in New York, and wetter than 91. Across the 7,247 U.S. stations with normals, its annual mean of 52.0°F is warmer than 49%.
In the Köppen classification computed from these normals, Westchester County Airport is Dfa: continental, 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 Westchester County Airport share this climate record?
19 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.
- Greenwich, CT64,594 people · 5 mi SE
- Riverside, CT9,216 people · 7 mi E
- Cos Cob, CT7,354 people · 6 mi E
- New Canaan, CT21,160 people · 12 mi NE
- Old Greenwich, CT6,904 people · 8 mi SE
- Noroton, CT5,522 people · 11 mi E
- Byram, CT5,011 people · 5 mi SE
- Pemberwick, CT3,455 people · 4 mi SE
- Old Hill, CT3,078 people · 18 mi E
- Noroton Heights, CT2,949 people · 11 mi E
- Glenville, CT2,663 people · 3 mi SE
- Wilton Center, CT1,730 people · 17 mi NE
- South Wilton, CT1,453 people · 17 mi NE
- Darien Downtown, CT1,329 people · 12 mi E
- Poplar Plains, CT1,203 people · 19 mi E
- Weston, CT10,490 people · 20 mi NE
- Cannondale, CT677 people · 18 mi NE
- Rock Ridge, CT453 people · 4 mi SE
- Indian Field, CT430 people · 6 mi SE
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 Westchester County Airport's climate
What is the coldest month at Westchester County Airport?
January, with a normal high of 37°F and a normal low of 22°F. The warmest is July (83°F by day, 65°F at night).
Does it snow at Westchester County Airport?
Yes. NOAA publishes no 1991-2020 snowfall normal for the station; the nearest record that keeps one, Dobbs Ferry (8 miles away), records 33 inches of snow in a normal year.
What is the rainiest month at Westchester County Airport?
September, with 4.94 in of precipitation in a normal year; the driest is February with 2.53 in.
What plant hardiness zone is Westchester County Airport in?
The USDA's 2023 map puts Westchester County Airport in zone 7a in ZIP code 10577, the nearest ZIP area. By the same method at the station, the coldest night of a typical year reaches 4°F (22 years, 1991-2020): zone 7a.
How late can frost come at Westchester County Airport?
In half of years the last 32°F night comes after April 12; in one year in ten it comes after April 27. Waiting until April 27 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Westchester County Airport in OctoberThis month day by day, its records and recent years
- New York climateThe statewide normals and every place in the state
- Dobbs Ferry, NY8 miles from this station, 53.4°F a year
- Stamford, CT9 miles from this station, 52.6°F a year
- Yorktown Heights, NY14 miles from this station, 49.4°F a year
- Bronx, NY17 miles from this station, 55.8°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made