Hammonton, NJ Climate: Temperature & Rain by Month
Temperature and precipitation from NOAA NCEI 1991–2020 normals →, plus PlainClimate's derived comfort score
30-year climate normals (1991-2020) from Hammonton's primary NOAA station, HAMMONTON 1 NE.
The climate verdict for Hammonton
Water is the standout signal in Hammonton, New Jersey: 47.5 inches of precipitation in a normal year. Against that wet profile, NOAA records an annual average of 55°F. Its climate comfort score of 68/100 (good) lands mid-pack nationally, exceeding 56% of station-mapped location scores.
- 55°F
- average temperature, NOAA 1991-2020 normal
- 68/100
- comfort score, above 56% of station-mapped location scores
- 47.5"
- annual precipitation · 19" snow
- 196 days
- frost-free days per growing season
Hammonton: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00283662 · Hammonton, NJ 55°F mean · 47.5" precip
TEMP-COOL · RANK-MID · PHOTO-FINISH · PRCP-MID · SWING-MID · COMF-MID · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 55°F
- RANK-MID #4,048
- PHOTO-FINISH ≈ Cranford
- PRCP-MID 47.5"
- SWING-MID 44°F
- COMF-MID 68/100
- LOAD-HEAT 4,880 HDD
- STN-1 USC00283662
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Cranford, NJ (+ 0.1 °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 NJ station list.
- Hammonton (this station) 55°F
- Cold Mt Holly S Jers…, NJ 55°F
- Hot Maysville Wwtp, KY 55°F
- Near Cranford, NJ 55°F
- Near Amistad, NM 55°F
Climate Living Index · Hammonton
Hammonton: 60/100 · grade C
Hammonton publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Hammonton, 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 | 196 days/year | 61/100 · C |
| Annual temperature balance | 54.6°F · 12.9° from 67.5°F | 58/100 · C |
| Precipitation balance | 47.5 in · 12.5 from 35 in | 56/100 · C |
| Snowfall burden | 19.0 inches/year | 50/100 · D |
Hammonton · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Hammonton is a temperate Köppen climate: Cfa
Coldest-month mean 32.8°F and warmest-month mean 76.9°F place this station in temperate, no dry season, hot summer climates (Cfa). Class Cfa is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: temperate, specifically temperate, no dry season, hot summer.
- Köppen code
- Cfa
- Group
- Temperate
- Warmest month
- 76.9°F
- Coldest month
- 32.8°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 Hammonton sits across the climate record
Three NOAA fields for Hammonton's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 59th percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- Top 25% wettest
- Hammonton'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 Hammonton compares across U.S. station-mapped locations
Hammonton'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
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 42°F (5°C) | 24°F (-5°C) | 33°F (0°C) | 3.5" | 5.7" | 25.1 | 0.0 |
| February | 45°F (7°C) | 25°F (-4°C) | 35°F (2°C) | 2.9" | 6.4" | 23.2 | 0.0 |
| March | 52°F (11°C) | 31°F (0°C) | 42°F (5°C) | 4.3" | 2.9" | 18.2 | 0.0 |
| April | 64°F (18°C) | 41°F (5°C) | 52°F (11°C) | 3.7" | 0.1" | 3.7 | 0.3 |
| May | 73°F (23°C) | 51°F (11°C) | 62°F (17°C) | 3.5" | 0.0" | 0.0 | 1.5 |
| June | 82°F (28°C) | 61°F (16°C) | 72°F (22°C) | 4.1" | 0.0" | 0.0 | 5.6 |
| July | 87°F (31°C) | 67°F (19°C) | 77°F (25°C) | 4.5" | 0.0" | 0.0 | 11.6 |
| August | 85°F (30°C) | 64°F (18°C) | 75°F (24°C) | 4.7" | 0.0" | 0.0 | 6.7 |
| September | 79°F (26°C) | 57°F (14°C) | 68°F (20°C) | 4.1" | 0.0" | 0.0 | 2.1 |
| October | 67°F (20°C) | 45°F (7°C) | 56°F (13°C) | 4.3" | 0.0" | 1.4 | 0.1 |
| November | 56°F (14°C) | 35°F (2°C) | 46°F (8°C) | 3.5" | 0.2" | 11.5 | 0.0 |
| December | 47°F (8°C) | 29°F (-2°C) | 38°F (3°C) | 4.6" | 3.7" | 21.9 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 88°F around July 11, short of 90°F on every date, while 112 dates carry a normal low at or below freezing, the coldest 23°F near January 22.
The freezing stretch
The normal low stays at or below 32°F into March 19, then returns to freezing around November 29, 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 41% of years recorded at least a hundredth of an inch. The driest is September 6 at 30%. Summed across the calendar, that is about 132 wet dates a year.
The widest day
April 26 carries the biggest normal gap between afternoon and dawn, 23°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Hammonton.
Monthly Precipitation
Average monthly rainfall and snowfall
Snow: 5.7"
11.1 days with precipitation
Snow: 6.4"
10.1 days with precipitation
Snow: 2.9"
10.9 days with precipitation
Snow: 0.1"
11.9 days with precipitation
12.3 days with precipitation
12.3 days with precipitation
11.9 days with precipitation
10.6 days with precipitation
9.5 days with precipitation
11.6 days with precipitation
Snow: 0.2"
9.2 days with precipitation
Snow: 3.7"
10.8 days with precipitation
Hammonton spreads its precipitation across the year
Neither half of the year dominates here: June through August take 28% of the annual total and December through February 23%, with neither reaching the 35% that would mark a distinct wet season. Hammonton has no dry season to plan around, though it does carry a 44.1°F seasonal spread.
The gap between the wettest and driest month still matters: August averages 4.7" and February 2.9". 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 Hammonton, it arrives in quantity
47.5" of precipitation falls across only about 132 wet days here, averaging 0.36 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 132 a year, 36% of all days
- Average depth per wet day
- 0.36 inches
- Most wet days
- May, about 12
- Fewest wet days
- November, 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.
Winter brings real snow to Hammonton
Hammonton averages 19.0 inches of snowfall a year, with February the snowiest month on the normals, spread across roughly 9 days that record measurable snow. That is depth accumulating on the ground, which is why it can exceed the annual precipitation figure: precipitation counts the liquid the snow melts down to, and fresh snow is mostly air.
- Annual snowfall: 19.0 inches of depth.
- Days recording measurable snow: about 9 a year.
- At a rough ten-to-one melt ratio, snow accounts for on the order of 4% of the year's precipitation.
NOAA 1991-2020 normals. The ten-to-one ratio is a convention, not a measurement: real ratios vary with temperature, so treat the share as an order of magnitude rather than an exact split.
Frost Dates & Growing Season
First Fall Freeze
October 27
50% probability date
Last Spring Freeze
April 14
50% probability date
Growing Season
196 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
4,880
Higher = more heating needed
Cooling Degree Days
1,115
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside NJ closest to Hammonton 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 (55°F here).
- Brownstown, IL 55°F · 0.0°F off
- Flemingsburg, KY 55°F · 0.0°F off
- Glenns Ferry, ID 55°F · 0.0°F off
- Jetmore, KS 55°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (47.5" here), excluding temperature-peer places.
- Alicia, AR 47.5" · 0.0" off
- Belchertown, MA 47.5" · 0.0" off
- Laurel, MD 47.5" · 0.0" off
- Augusta, KY 47.5" · 0.0" off
Snow and freeze rhythm
When cold and snow define Hammonton
heating led · wet · mid swing
Hammonton's energy balance leans toward cold weather: 4,880 annual heating degree days against 1,115 for cooling. Its 44.1°F seasonal range still makes the monthly rows more useful than the annual average alone.
Hammonton's frost-free season lasts about 196 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
-
1. Hammonton coldest normal
January
The monthly mean of 33°F (0°C) sits near freezing, so cold nights and above-freezing afternoons share the same month.
-
2. Hammonton typical freeze period
January through December
The station reports average freezing days from January through December.
-
3. Hammonton snow peak
February
Hammonton averages 19.0 inches of snow a year, with February the snowiest month on the normals.
Questions about Hammonton's climate
How much snow does Hammonton get? ▼
How cold does Hammonton get in winter? ▼
How much energy does heating and cooling require in Hammonton? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Hammonton's primary station: HAMMONTON 1 NE (USC00283662). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The 2024 Census Gazetteer identifies the exact name-and-state match as an incorporated place (GEOID 3429430). Match rule for Hammonton: exact normalized name + state only, no fuzzy expansion, so nearby differently spelled facilities stay unmatched.
On this page every temperature, precipitation, and derived score for Hammonton 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.