Westchester County, NY Climate: Temperature & Rain by Month
Pulled from NOAA NCEI 1991–2020 normals →: climate measurements used in PlainClimate's documented score
30-year climate normals (1991-2020) from Westchester County's primary NOAA station, WESTCHESTER CO AP.
The climate verdict for Westchester County
Water is the standout signal in Westchester County, New York: 47.8 inches of precipitation in a normal year. Against that wet profile, NOAA records an annual average of 52°F. Its climate comfort score of 68/100 (good) lands mid-pack nationally, exceeding 56% of station-mapped location scores.
- 52°F
- average temperature, NOAA 1991-2020 normal
- 68/100
- comfort score, above 56% of station-mapped location scores
- 47.8"
- precipitation, annual total
- 202 days
- frost-free days per growing season
Westchester County: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USW00094745 · Westchester County, NY 52°F mean · 47.8" precip
TEMP-COOL · RANK-MID · PHOTO-FINISH · PRCP-MID · SWING-MID · COMF-MID · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 52°F
- RANK-MID #3,362
- PHOTO-FINISH ≈ Hopewell Morgan…
- PRCP-MID 47.8"
- SWING-MID 44°F
- COMF-MID 68/100
- LOAD-HEAT 5,492 HDD
- STN-1 USW00094745
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Hopewell Morgantown, PA (+ 0 °F mean)
Instrument codes from this station's NOAA 1991–2020 normals, mean temperature, corpus warmth rank, photo-finish peer station, precipitation band, seasonal swing, comfort composite, degree-day load, and field book, not a livability rating.
Mean-temperature neighbourhood
Nationwide NOAA normal poles and nearest peers, not a reprint of every NY station list.
- Westchester Cou… (this station) 52°F
- Cold Connellsville, PA 52°F
- Hot Uniontown, PA 52°F
- Near Hopewell Morgan…, PA 52°F
- Near Providence T F…, RI 52°F
Climate Living Index · Westchester County
Westchester County: 58/100 · grade C
Westchester County publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals · NOAA hourly normals); 1 missing weight rescale to 100.
PlainClimate-derived for Westchester County, not an official NOAA rating. Rankings still use Comfort Score 68/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Normal heat + freeze calendar | 112 calendar days | 69/100 · C |
| Frost-free season | 202 days/year | 66/100 · C |
| Precipitation balance | 47.8 in · 12.8 from 35 in | 55/100 · C |
| Summer moisture balance | 61.6°F mean dew point | 51/100 · D |
| Annual temperature balance | 52.0°F · 15.5° from 67.5°F | 49/100 · D |
Westchester County · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Westchester County is a continental Köppen climate: Dfa
Coldest-month mean 29.8°F and warmest-month mean 74.0°F place this station in continental, no dry season, hot summer climates (Dfa). Class Dfa is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: continental, specifically continental, no dry season, hot summer.
- Köppen code
- Dfa
- Group
- Continental
- Warmest month
- 74.0°F
- Coldest month
- 29.8°F
Source: official public datasets monthly normals (1991–2020) at the city’s primary station. This is a station classification, not a mapped regional consensus.
National standing · heating-led station
Where Westchester County sits across the climate record
Three NOAA fields for Westchester County's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 49th percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- Top 25% wettest
- Westchester County's annual total ranks in the wetter third of 6,352 measured normals.
- Seasonal temperature swing
- 54th percentile swing
- Typical seasonal amplitude versus 6,861 complete station-years.
How Westchester County compares across U.S. station-mapped locations
Westchester County's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
68 Top 44% score exceeds 56% of 6,189 station-mapped location scores
- 0–10: 0 station-mapped locations (0%). Below this entry.
- 10–20: 0 station-mapped locations (0%). Below this entry.
- 20–30: 96 station-mapped locations (2%). Below this entry.
- 30–40: 280 station-mapped locations (5%). Below this entry.
- 40–50: 1,113 station-mapped locations (18%). Below this entry.
- 50–60: 1,329 station-mapped locations (21%). Below this entry.
- 60–70: 1,236 station-mapped locations (20%). This entry sits in this band.
- 70–80: 650 station-mapped locations (11%). Above this entry.
- 80–90: 921 station-mapped locations (15%). Above this entry.
- 90–100: 564 station-mapped locations (9%). Above this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Westchester County's measured station temperature trend
MethodologyAcross 53 complete annual observations from 1953 to 2025, WESTCHESTER CO AP warmed at a fitted rate of 0.30°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Westchester County primary station fitted change +0.30 °C/decade
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 37°F (3°C) | 22°F (-5°C) | 30°F (-1°C) | 3.2" | 26.1 | 0.0 |
| February | 40°F (5°C) | 24°F (-5°C) | 32°F (0°C) | 2.5" | 23.3 | 0.0 |
| March | 48°F (9°C) | 31°F (-1°C) | 39°F (4°C) | 4.1" | 18.6 | 0.0 |
| April | 59°F (15°C) | 40°F (5°C) | 50°F (10°C) | 4.2" | 3.7 | 0.0 |
| May | 69°F (21°C) | 50°F (10°C) | 60°F (15°C) | 3.9" | 0.1 | 0.3 |
| June | 78°F (26°C) | 59°F (15°C) | 69°F (20°C) | 4.3" | 0.0 | 1.8 |
| July | 83°F (28°C) | 65°F (18°C) | 74°F (23°C) | 4.1" | 0.0 | 4.7 |
| August | 81°F (27°C) | 64°F (18°C) | 72°F (22°C) | 4.4" | 0.0 | 2.3 |
| September | 74°F (23°C) | 57°F (14°C) | 65°F (19°C) | 4.9" | 0.0 | 0.6 |
| October | 63°F (17°C) | 46°F (8°C) | 54°F (12°C) | 4.3" | 1.1 | 0.0 |
| November | 52°F (11°C) | 36°F (2°C) | 44°F (7°C) | 3.6" | 9.7 | 0.0 |
| December | 42°F (6°C) | 28°F (-2°C) | 35°F (2°C) | 4.2" | 22.1 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 84°F around July 15, short of 90°F on every date, while 112 dates carry a normal low at or below freezing, the coldest 22°F near January 22.
The freezing stretch
The normal low stays at or below 32°F into March 21, then returns to freezing around December 1, covering 112 dates in all.
Derived from the normal daily minimum. This is a different measure from the 50%-probability frost dates shown elsewhere on this page, which come from NOAA’s frost product.
Where the wet dates fall
The likeliest wet date is May 17, when 39% of years recorded at least a hundredth of an inch. The driest is January 28 at 30%. Summed across the calendar, that is about 125 wet dates a year.
The widest day
April 29 carries the biggest normal gap between afternoon and dawn, 20°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Westchester County.
Where Westchester County Stands Nationally
Among the steadiest day-night climates ranked: even the widest normal daily swing holds to roughly 20°F.
Westchester County earns one nationally notable standing (outer quintile) against 6,860 NOAA 1991–2020 normals stations, middle-of-the-pack metrics stay silent here.
Monthly Precipitation
Average monthly rainfall
9.5 days with precipitation
8.9 days with precipitation
10.5 days with precipitation
11.1 days with precipitation
12.2 days with precipitation
10.8 days with precipitation
9.8 days with precipitation
10.5 days with precipitation
9.8 days with precipitation
10.4 days with precipitation
9.8 days with precipitation
11.1 days with precipitation
Westchester County spreads its precipitation across the year
Neither half of the year dominates here: June through August take 27% of the annual total and December through February 21%, with neither reaching the 35% that would mark a distinct wet season. Westchester County has no dry season to plan around, though it does carry a 44.2°F seasonal spread.
The gap between the wettest and driest month still matters: September averages 4.9" and February 2.5". The three wettest months together take 29% of the year, against the 25% a perfectly flat distribution would give them.
Shares are computed from this station's own 1991-2020 monthly precipitation normals. "Spread across the year" means neither the June-August nor the December-February share reaches 35%; it describes an average year, not the variability of any single one.
When it rains in Westchester County, it arrives in quantity
47.8" of precipitation falls across only about 124 wet days here, averaging 0.38 inches each. Fewer days carry more water: the year's total is delivered in comparatively heavy events rather than persistent damp.
- Days with measurable precipitation
- about 124 a year, 34% of all days
- Average depth per wet day
- 0.38 inches
- Most wet days
- May, about 12
- Fewest wet days
- February, about 9
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year, and a per-day average is not a forecast of any individual storm.
Frost Dates & Growing Season
First Fall Freeze
October 31
50% probability date
Last Spring Freeze
April 12
50% probability date
Growing Season
202 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
5,492
Higher = more heating needed
Cooling Degree Days
787
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Humidity & Wind
Monthly averages from hourly observations
| Month | Humidity | Wind (mph) | Clear Sky % | Overcast % |
|---|---|---|---|---|
| January | 59% | 8.7 | N/A | N/A |
| February | 59% | 9.4 | N/A | N/A |
| March | 58% | 8.9 | N/A | N/A |
| April | 60% | 7.9 | N/A | N/A |
| May | 69% | 6.6 | N/A | N/A |
| June | 69% | 6.1 | N/A | N/A |
| July | 72% | 5.7 | N/A | N/A |
| August | 72% | 6.0 | N/A | N/A |
| September | 74% | 6.4 | N/A | N/A |
| October | 67% | 7.7 | N/A | N/A |
| November | 66% | 8.2 | N/A | N/A |
| December | 65% | 8.8 | N/A | N/A |
Nationwide similar cities
Other rankable U.S. places outside NY closest to Westchester County on two NOAA annual-normal axes (mean temperature and annual precipitation). Chip rows use distinct link sets.
Closest by average temperature
Nearest out-of-state peers by annual mean temperature (52°F here).
- Arapahoe, CO 52°F · 0.0°F off
- Athens, IL 52°F · 0.0°F off
- Congerville, IL 52°F · 0.0°F off
- Farmington, UT 52°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (47.8" here), excluding temperature-peer places.
- Watkinsville, GA 47.8" · 0.0" off
- Cynthiana, KY 47.7" · 0.0" off
- Fairmont, WV 47.8" · 0.0" off
- Gardiner, ME 47.7" · 0.0" off
Data-derived climate profile
How Westchester County's climate pattern fits together
heating led · wet · mid swing
Westchester County's energy balance leans toward cold weather: 5,492 annual heating degree days against 787 for cooling. Its 44.2°F seasonal range still makes the monthly rows more useful than the annual average alone.
Westchester County's frost-free season lasts about 202 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
July and January mark the typical warm and cold ends of the calendar in Westchester County's middle-range seasonal profile. The measured spread is 44.2°F. The annual average is 52°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
Alongside its heating load, Westchester County carries 47.8 inches of precipitation in a normal year, inside PlainClimate's wet range. Snowfall is not added to the interpretation because its annual value is missing. That distinction matters because a wet annual total can arrive as rain, snow, or a mixture at different times.
These labels group NOAA 1991-2020 normals from Westchester County's primary station, so the winter figures are a thirty-year average and not a floor: a single hard season can run well below them. Treat each band as a descriptive range for Westchester County, not an official NOAA class or a year-ahead forecast.
Questions about Westchester County's climate
How much rain does Westchester County get? ▼
How cold does Westchester County get in winter? ▼
How much energy does heating and cooling require in Westchester County? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Westchester County's primary station: WESTCHESTER CO AP (USW00094745). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The conservative exact name-and-state crosswalk finds no Census place match, so PlainClimate treats this as a station-mapped location and does not claim it is a municipality. No exact Gazetteer row for Westchester County; facility counts that depend on place identity are therefore an upper bound, not a municipal census.
On this page every temperature, precipitation, and derived score for Westchester County comes from its primary NOAA station record. No figure on this page is typed in by an editor - each value is rendered from NOAA 1991-2020 U.S. Climate Normals. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 1991–2020 normals.