Newton, New Jersey climate: Normal weather by month, frost dates and records
Newton's normal year runs from 17°F January nights to 84°F July afternoons. (NOAA 1991-2020 normals)
In metric: a yearly mean of 10.2°C, January lows of −8°C, July highs of 29°C.
- NOAA stationNewton
- Station IDUSC00286177
- Location41.06°N 74.76°W
- Elevation605 ft (184 m)
- Population8,435
On October 23, the normal high in Newton is 62°F and the normal low 38°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Newton.
- Jan 37° 17°
- Feb 40° 19°
- Mar 48° 28°
- Apr 61° 38°
- May 70° 48°
- Jun 80° 57°
- Jul 84° 62°
- Aug 83° 60°
- Sep 75° 52°
- Oct 64° 41°
- Nov 52° 32°
- Dec 41° 24°
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 Newton each month?
July is the warmest month, with normal highs of 84°F; January the coldest, with normal lows of 17°F.
| Month | High | Low | Mean | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|
| January | 37°F | 17°F | 27.0°F | – | <1 | 28 | 9 h 30 min |
| February | 40°F | 19°F | 29.3°F | – | <1 | 26 | 10 h 40 min |
| March | 48°F | 28°F | 37.7°F | – | <1 | 23 | 11 h 50 min |
| April | 61°F | 38°F | 49.1°F | – | <1 | 10 | 13 h 20 min |
| May | 70°F | 48°F | 59.2°F | – | 1 | 1 | 14 h 30 min |
| June | 80°F | 57°F | 68.0°F | – | 2 | <1 | 15 h 10 min |
| July | 84°F | 62°F | 73.0°F | – | 5 | <1 | 14 h 50 min |
| August | 83°F | 60°F | 71.5°F | – | 4 | <1 | 13 h 50 min |
| September | 75°F | 52°F | 63.6°F | – | 1 | 1 | 12 h 30 min |
| October | 64°F | 41°F | 52.3°F | – | <1 | 9 | 11 h 10 min |
| November | 52°F | 32°F | 41.9°F | – | <1 | 20 | 10 h |
| December | 41°F | 24°F | 32.6°F | – | <1 | 25 | 9 h 10 min |
| Year (annual) | 61°F | 40°F | 50.4°F | – | 12 | 142 |
The same normals in °C and millimetres
| Month | High | Low | Mean |
|---|---|---|---|
| January | 3°C | −8°C | −2.8°C |
| February | 4°C | −7°C | −1.5°C |
| March | 9°C | −2°C | 3.2°C |
| April | 16°C | 3°C | 9.5°C |
| May | 21°C | 9°C | 15.1°C |
| June | 26°C | 14°C | 20.0°C |
| July | 29°C | 17°C | 22.8°C |
| August | 28°C | 16°C | 21.9°C |
| September | 24°C | 11°C | 17.6°C |
| October | 18°C | 5°C | 11.3°C |
| November | 11°C | 0°C | 5.5°C |
| December | 5°C | −4°C | 0.3°C |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Sussex (3 mi WNW) (13 miles away), gets 39 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00286177; 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 Newton?
Normal highs sit between 65°F and 85°F in May, 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 USC00286177.
When is the last frost in Newton?
In Newton, the last spring frost (32°F) comes after April 24 in half of years and after May 9 in one year in ten; the first autumn frost comes before October 16 in half of years and before October 2 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 9; 9 in 10 after April 11
- First autumn frost, half of years before
- October 161 year in 10 before October 2; 9 in 10 before November 1
NOAA puts the median frost-free season at 176 days, and the season without a hard freeze (28°F) at 201 days.
A hard freeze (28°F) comes after April 10 in half of springs and before October 30 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Newton in zone 6b in ZIP code 07860, the nearest ZIP area.
Frost dates for every NOAA station in New Jersey · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00286177; 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 in Newton?
In a normal year in Newton, 12 days a year reach 90°F and 142 nights fall to 32°F or colder.
- Days at 90°F or more
- 12a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 142a normal year
- Days that stay below freezing
- 27high of 32°F or less
The highest temperature in this station's record (since 1893) is 105°F, on July 31, 1933; the lowest is −26°F, on January 22, 1961.
The wettest calendar year on that record is 1996, with 63.13 in; the snowiest season is 1960–61, with 80.3 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00286177; records: ACIS (NOAA Regional Climate Centers), station USC00286177. Records use complete months only; a month missing more than three days is left out.
How sunny is Newton?
Over a year 71% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Newton, 3.8 kWh per square metre a day. July is the sunniest month (78%) and December the cloudiest (61%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 65% | 1.8 |
| February | 67% | 2.6 |
| March | 67% | 3.6 |
| April | 68% | 4.6 |
| May | 68% | 5.3 |
| June | 72% | 5.8 |
| July | 78% | 5.9 |
| August | 76% | 5.1 |
| September | 75% | 4.2 |
| October | 68% | 2.8 |
| November | 68% | 2.0 |
| December | 61% | 1.4 |
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 Newton need?
A normal year in Newton brings 5,978 heating degree days, 11% more than the median U.S. place (5,373), and 705 cooling degree days, 22% 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 2,902 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,178 | 0 |
| February | 999 | 0 |
| March | 847 | 0 |
| April | 485 | 6 |
| May | 216 | 36 |
| June | 45 | 134 |
| July | 3 | 250 |
| August | 8 | 210 |
| September | 106 | 64 |
| October | 397 | 5 |
| November | 692 | 0 |
| December | 1,004 | 0 |
| Year (annual) | 5,978 | 705 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00286177. 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 Newton's climate compare?
Newton is warmer than 2 of the other 32 places with their own NOAA record in New Jersey. Across the 7,247 U.S. stations with normals, its annual mean of 50.4°F is warmer than 42%.
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers.
Which places near Newton share this climate record?
7 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.
- Saw Creek, PA3,980 people · 16 mi W
- Pine Ridge, PA2,751 people · 13 mi NW
- Crandon Lakes, NJ1,258 people · 6 mi NW
- Pocono Ranch Lands, PA1,192 people · 13 mi NW
- Pocono Mountain Lake Estates, PA1,168 people · 13 mi NW
- Branchville, NJ810 people · 6 mi N
- Ross Corner, NJ28 people · 6 mi NE
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 Newton's climate
What is the coldest month in Newton?
January, with a normal high of 37°F and a normal low of 17°F. The warmest is July (84°F by day, 62°F at night).
Does it snow in Newton?
Yes. NOAA publishes no 1991-2020 snowfall normal for Newton's NOAA station; the nearest record that keeps one, Sussex (3 mi WNW) (13 miles away), records 39 inches of snow in a normal year.
What plant hardiness zone is Newton in?
The USDA's 2023 map puts Newton in zone 6b in ZIP code 07860, the nearest ZIP area.
How late can frost come in Newton?
In half of years the last 32°F night comes after April 24; in one year in ten it comes after May 9. Waiting until May 9 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
- Andover, NJ3 miles from this station, 50.5°F a year
- Sussex, NJ12 miles from this station, 50.1°F a year
- Charlotteburg Reservoir, NJ17 miles from this station, 50.0°F a year
- Boonton, NJ22 miles from this station, 51.8°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made