Flemington, New Jersey climate: Normal weather by month, frost dates and records
Flemington's normal year runs from 21°F January nights to 86°F July afternoons, with 50.9 inches of precipitation and 27 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 11.2°C, January lows of −6°C, July highs of 30°C, 1,294 mm of precipitation a year.
- NOAA stationFlemington (5 mi NNW)
- Station IDUSC00283029
- Location40.57°N 74.88°W
- Elevation265 ft (81 m)
- From the center5 miles
- Population4,905
On October 22, the normal high in Flemington is 63°F and the normal low 40°F, and the chance of measurable rain or snow is 31%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Flemington.
- Jan 38° 21°
- Feb 41° 22°
- Mar 50° 29°
- Apr 63° 39°
- May 72° 49°
- Jun 81° 58°
- Jul 86° 63°
- Aug 84° 61°
- Sep 77° 54°
- Oct 65° 42°
- Nov 53° 33°
- Dec 43° 26°
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 Flemington each month?
July is the warmest month, with normal highs of 86°F; January the coldest, with normal lows of 21°F. The most precipitation falls in July (4.94 in), the least in February (3.11 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 38°F | 21°F | 29.2°F | 3.93 | 6.2 | 11 | <1 | 27 | 9 h 30 min |
| February | 41°F | 22°F | 31.3°F | 3.11 | 9.4 | 9 | <1 | 25 | 10 h 40 min |
| March | 50°F | 29°F | 39.3°F | 4.52 | 5.7 | 11 | <1 | 21 | 11 h 50 min |
| April | 63°F | 39°F | 50.6°F | 4.14 | 0.9 | 12 | <1 | 7 | 13 h 10 min |
| May | 72°F | 49°F | 60.5°F | 4.28 | 0.0 | 13 | 1 | 1 | 14 h 20 min |
| June | 81°F | 58°F | 69.5°F | 4.77 | 0.0 | 12 | 4 | <1 | 15 h |
| July | 86°F | 63°F | 74.6°F | 4.94 | 0.0 | 11 | 9 | <1 | 14 h 50 min |
| August | 84°F | 61°F | 72.7°F | 4.24 | 0.0 | 11 | 5 | <1 | 13 h 50 min |
| September | 77°F | 54°F | 65.7°F | 4.39 | 0.0 | 9 | 2 | <1 | 12 h 30 min |
| October | 65°F | 42°F | 53.6°F | 4.46 | 0.0 | 10 | <1 | 4 | 11 h 10 min |
| November | 53°F | 33°F | 43.2°F | 3.50 | 0.4 | 9 | <1 | 16 | 10 h |
| December | 43°F | 26°F | 34.5°F | 4.66 | 4.5 | 11 | <1 | 24 | 9 h 20 min |
| Year (annual) | 63°F | 41°F | 52.1°F | 50.94 | 27.1 | 127 | 21 | 124 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 3°C | −6°C | −1.6°C | 100 mm | 16 cm |
| February | 5°C | −6°C | −0.4°C | 79 mm | 24 cm |
| March | 10°C | −2°C | 4.1°C | 115 mm | 14 cm |
| April | 17°C | 4°C | 10.3°C | 105 mm | 2 cm |
| May | 22°C | 9°C | 15.8°C | 109 mm | 0 cm |
| June | 27°C | 14°C | 20.8°C | 121 mm | 0 cm |
| July | 30°C | 17°C | 23.7°C | 125 mm | 0 cm |
| August | 29°C | 16°C | 22.6°C | 108 mm | 0 cm |
| September | 25°C | 12°C | 18.7°C | 112 mm | 0 cm |
| October | 18°C | 6°C | 12.0°C | 113 mm | 0 cm |
| November | 12°C | 1°C | 6.2°C | 89 mm | 1 cm |
| December | 6°C | −3°C | 1.4°C | 118 mm | 11 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00283029; 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 Flemington?
Normal highs sit between 65°F and 85°F in May, June, August, September and October. Of those, September has the fewest days with rain (9).
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 USC00283029.
When is the last frost in Flemington?
In Flemington, the last spring frost (32°F) comes after April 24 in half of years and after May 11 in one year in ten; the first autumn frost comes before October 21 in half of years and before October 6 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 241 year in 10 after May 11; 9 in 10 after April 9
- First autumn frost, half of years before
- October 211 year in 10 before October 6; 9 in 10 before November 5
NOAA puts the median frost-free season at 179 days, and the season without a hard freeze (28°F) at 206 days.
A hard freeze (28°F) comes after April 8 in half of springs and before November 2 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Flemington in zone 7a in ZIP code 08822, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Flemington's NOAA station is in zone 7a: the coldest night of a typical year reaches 2°F (29 complete years).
Frost dates for every NOAA station in New Jersey · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00283029; 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 Flemington?
In a normal year in Flemington, 21 days a year reach 90°F, 124 nights fall to 32°F or colder and 127 days bring measurable precipitation.
- Days at 90°F or more
- 21a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 124a normal year
- Days that stay below freezing
- 21high of 32°F or less
- Days with 0.01 inch of precipitation
- 127a normal year
- Days with 1 inch of snow or more
- 8a normal year
The highest temperature in this station's record (since 1898) is 108°F, on August 7, 1918; the lowest is −18°F, on January 14, 1912.
The wettest calendar year on that record is 2011, with 76.45 in; the snowiest season is 1960–61, with 90.2 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00283029; records: ACIS (NOAA Regional Climate Centers), station USC00283029. Records use complete months only; a month missing more than three days is left out.
How sunny is Flemington?
Over a year 73% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Flemington, 3.9 kWh per square metre a day. July is the sunniest month (80%) and December the cloudiest (66%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 68% | 1.9 |
| February | 71% | 2.8 |
| March | 69% | 3.7 |
| April | 71% | 4.8 |
| May | 70% | 5.4 |
| June | 76% | 6.0 |
| July | 80% | 6.0 |
| August | 78% | 5.2 |
| September | 76% | 4.3 |
| October | 71% | 3.0 |
| November | 72% | 2.2 |
| 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 much heating and cooling does Flemington need?
A normal year in Flemington brings 5,547 heating degree days, 3% more than the median U.S. place (5,373), and 870 cooling degree days, 4% 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 3,197 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,110 | 0 |
| February | 942 | 0 |
| March | 797 | 0 |
| April | 440 | 8 |
| May | 184 | 44 |
| June | 32 | 165 |
| July | 2 | 299 |
| August | 5 | 245 |
| September | 77 | 98 |
| October | 362 | 10 |
| November | 653 | 0 |
| December | 946 | 0 |
| Year (annual) | 5,547 | 870 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00283029. 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 Flemington been warmer than normal lately?
2023 averaged 53.8°F, 1.7°F above the 1991-2020 normal of 52.1°F.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2023 | 53.8°F | +1.7°F | 60.66 | 3.6 |
Over 102 complete years from 1899 to 2024, the station's annual mean temperature rose at a fitted 4.1°F per century (+0.23°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00283029; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Flemington's climate compare?
Flemington is warmer than 6 of the other 32 places with their own NOAA record in New Jersey, and wetter than 26. Across the 7,247 U.S. stations with normals, its annual mean of 52.1°F is warmer than 50%.
In the Köppen classification computed from these normals, Flemington 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 Flemington 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.
- High Bridge, NJ3,607 people · 7 mi N
- Clinton, NJ2,793 people · 5 mi N
- Annandale, NJ1,751 people · 5 mi N
- Glen Gardner, NJ1,691 people · 9 mi N
- Lebanon, NJ1,675 people · 5 mi NE
- Califon, NJ1,018 people · 10 mi N
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 Flemington's climate
What is the coldest month in Flemington?
January, with a normal high of 38°F and a normal low of 21°F. The warmest is July (86°F by day, 63°F at night).
Does it snow in Flemington?
Yes: 27 inches in a normal year, falling on 14 days with 0.1 inch or more, the most in February (9.4 inches).
What is the rainiest month in Flemington?
July, with 4.94 in of precipitation in a normal year; the driest is February with 3.11 in.
What plant hardiness zone is Flemington in?
The USDA's 2023 map puts Flemington in zone 7a in ZIP code 08822, the nearest ZIP area. By the same method at Flemington's NOAA station, the coldest night of a typical year reaches 2°F (29 years, 1991-2020): zone 7a.
How late can frost come in Flemington?
In half of years the last 32°F night comes after April 24; in one year in ten it comes after May 11. Waiting until May 11 leaves about a one-in-ten chance of a later frost.
Nearby and next
- New Jersey climateThe statewide normals and every place in the state
- Wertsville (4 mi NE), NJ10 miles from this station, 52.5°F a year
- Somerville, NJ12 miles from this station, 52.5°F a year
- Lambertville, NJ15 miles from this station, 53.1°F a year
- Bucksville, PA17 miles from this station, 51.6°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made