Millbrook, New York climate: Normal weather by month, frost dates and records
Millbrook's normal year runs from 16°F January nights to 83°F July afternoons, with 45.8 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 9.2°C, January lows of −9°C, July highs of 28°C, 1,162 mm of precipitation a year.
- NOAA stationMillbrook (3 mi W)
- Station IDUSW00064756
- Location41.79°N 73.74°W
- Elevation413 ft (126 m)
- From the center3 miles
- Population1,445
On October 23, the normal high in Millbrook is 59°F and the normal low 37°F, and the chance of measurable rain or snow is 35%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Millbrook.
- Jan 35° 16°
- Feb 38° 18°
- Mar 47° 26°
- Apr 60° 35°
- May 70° 46°
- Jun 78° 54°
- Jul 83° 59°
- Aug 80° 58°
- Sep 74° 50°
- Oct 62° 39°
- Nov 50° 31°
- Dec 40° 23°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Millbrook each month?
July is the warmest month, with normal highs of 83°F; January the coldest, with normal lows of 16°F. The most precipitation falls in September (4.61 in), the least in February (3.07 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 35°F | 16°F | 25.1°F | 3.31 | 11 | <1 | 28 | 9 h 30 min |
| February | 38°F | 18°F | 28.0°F | 3.07 | 12 | <1 | 26 | 10 h 30 min |
| March | 47°F | 26°F | 36.2°F | 3.68 | 12 | <1 | 23 | 11 h 50 min |
| April | 60°F | 35°F | 47.4°F | 3.49 | 12 | <1 | 11 | 13 h 20 min |
| May | 70°F | 46°F | 57.8°F | 3.45 | 13 | 1 | 2 | 14 h 30 min |
| June | 78°F | 54°F | 65.7°F | 4.06 | 13 | 1 | <1 | 15 h 10 min |
| July | 83°F | 59°F | 70.7°F | 3.78 | 12 | 4 | <1 | 15 h |
| August | 80°F | 58°F | 68.8°F | 4.59 | 12 | 2 | <1 | 13 h 50 min |
| September | 74°F | 50°F | 62.0°F | 4.61 | 10 | 1 | <1 | 12 h 30 min |
| October | 62°F | 39°F | 50.5°F | 4.20 | 12 | <1 | 7 | 11 h 10 min |
| November | 50°F | 31°F | 40.4°F | 3.46 | 10 | <1 | 19 | 9 h 50 min |
| December | 40°F | 23°F | 31.0°F | 4.05 | 13 | <1 | 26 | 9 h 10 min |
| Year (annual) | 60°F | 38°F | 48.6°F | 45.75 | 142 | 9 | 141 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 1°C | −9°C | −3.8°C | 84 mm |
| February | 3°C | −8°C | −2.2°C | 78 mm |
| March | 8°C | −4°C | 2.3°C | 93 mm |
| April | 15°C | 2°C | 8.6°C | 89 mm |
| May | 21°C | 8°C | 14.3°C | 88 mm |
| June | 25°C | 12°C | 18.7°C | 103 mm |
| July | 28°C | 15°C | 21.5°C | 96 mm |
| August | 27°C | 14°C | 20.4°C | 117 mm |
| September | 23°C | 10°C | 16.7°C | 117 mm |
| October | 17°C | 4°C | 10.3°C | 107 mm |
| November | 10°C | −1°C | 4.7°C | 88 mm |
| December | 4°C | −5°C | −0.6°C | 103 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Stormville (17 miles away), gets 58 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USW00064756; 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.
When is the best weather to visit Millbrook?
Normal highs sit between 65°F and 85°F in May, June, July, August and September. Of those, September 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 USW00064756.
When is the last frost in Millbrook?
In Millbrook, the last spring frost (32°F) comes after May 4 in half of years and after May 21 in one year in ten; the first autumn frost comes before October 7 in half of years and before September 28 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
- May 41 year in 10 after May 21; 9 in 10 after April 21
- First autumn frost, half of years before
- October 71 year in 10 before September 28; 9 in 10 before October 24
NOAA puts the median frost-free season at 155 days, and the season without a hard freeze (28°F) at 179 days.
A hard freeze (28°F) comes after April 22 in half of springs and before October 19 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Millbrook in zone 6a in ZIP code 12545, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Millbrook's NOAA station is in zone 6a: the coldest night of a typical year reaches −8°F (16 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 USW00064756; 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 in Millbrook?
In a normal year in Millbrook, 9 days a year reach 90°F, 141 nights fall to 32°F or colder and 142 days bring measurable precipitation.
- Days at 90°F or more
- 9a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 141a normal year
- Days that stay below freezing
- 32high of 32°F or less
- Days with 0.01 inch of precipitation
- 142a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USW00064756.
How sunny is Millbrook?
Over a year 72% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Millbrook, 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 much heating and cooling does Millbrook need?
A normal year in Millbrook brings 6,427 heating degree days, 20% more than the median U.S. place (5,373), and 497 cooling degree days, 45% 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 2,534 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,235 | 0 |
| February | 1,036 | 0 |
| March | 891 | 0 |
| April | 533 | 3 |
| May | 246 | 23 |
| June | 65 | 84 |
| July | 10 | 188 |
| August | 22 | 141 |
| September | 143 | 53 |
| October | 455 | 4 |
| November | 737 | 0 |
| December | 1,054 | 0 |
| Year (annual) | 6,427 | 497 |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00064756. 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.
Has Millbrook been warmer than normal lately?
2025 averaged 49.4°F, 0.8°F above the 1991-2020 normal of 48.6°F. 5 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 50.4°F | +1.8°F | 51.29 |
| 2022 | 50.0°F | +1.4°F | 40.85 |
| 2023 | 51.1°F | +2.5°F | 59.81 |
| 2024 | 51.2°F | +2.6°F | 46.03 |
| 2025 | 49.4°F | +0.8°F | 44.10 |
Source: observed years: ACIS, station USW00064756. A year counts only with all twelve months complete.
How does Millbrook's climate compare?
Millbrook is warmer than 85 of the other 130 places with their own NOAA record in New York, and wetter than 80. Across the 7,247 U.S. stations with normals, its annual mean of 48.6°F is warmer than 34%.
In the Köppen classification computed from these normals, Millbrook is Dfb: continental, no dry season, warm 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 Millbrook share this climate record?
6 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.
- Haviland, NY3,694 people · 8 mi W
- Pleasant Valley, NY1,814 people · 5 mi SW
- New Preston, CT1,121 people · 22 mi E
- Sharon, CT2,755 people · 16 mi NE
- Salt Point, NY259 people · 3 mi NW
- Cornwall Bridge, CT239 people · 18 mi E
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 Millbrook's climate
What is the coldest month in Millbrook?
January, with a normal high of 35°F and a normal low of 16°F. The warmest is July (83°F by day, 59°F at night).
Does it snow in Millbrook?
Yes. NOAA publishes no 1991-2020 snowfall normal for Millbrook's NOAA station; the nearest record that keeps one, Stormville (17 miles away), records 58 inches of snow in a normal year.
What is the rainiest month in Millbrook?
September, with 4.61 in of precipitation in a normal year; the driest is February with 3.07 in.
What plant hardiness zone is Millbrook in?
The USDA's 2023 map puts Millbrook in zone 6a in ZIP code 12545, the nearest ZIP area. By the same method at Millbrook's NOAA station, the coldest night of a typical year reaches −8°F (16 years, 1991-2020): zone 6a.
How late can frost come in Millbrook?
In half of years the last 32°F night comes after May 4; in one year in ten it comes after May 21. Waiting until May 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
- Rhinebeck, NY9 miles from this station, 48.0°F a year
- Poughkeepsie, NY13 miles from this station, 50.5°F a year
- Stormville, NY17 miles from this station, 50.4°F a year
- Mohonk Lake, NY21 miles from this station, 50.4°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made