Glassboro, NJ Climate: Temperature by Month
Annual temperature and rainfall from NOAA NCEI's 1991–2020 normals →; comfort score computed by PlainClimate
30-year climate normals (1991-2020) from Glassboro's primary NOAA station, GLASSBORO 2 NE.
The climate verdict for Glassboro
Glassboro, New Jersey has a mixed annual climate rather than one dominant extreme. Its NOAA normal shows an annual average of 55°F. July is the warmest month at 77°F and January the coldest at 33°F.
- 55°F
- average temperature, NOAA 1991-2020 normal
- 207 days
- growing season, frost-free days
Glassboro: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00283291 · Glassboro, NJ 55°F mean
TEMP-COOL · RANK-UPPER · PHOTO-FINISH · PRCP-UNK · SWING-MID · COMF-UNK · LOAD-HEAT · STN-1 · BOOK-PART
- TEMP-COOL 55°F
- RANK-UPPER #4,117
- PHOTO-FINISH ≈ Parkersburg
- PRCP-UNK Rain n/a
- SWING-MID 44°F
- COMF-UNK Comfort n/a
- LOAD-HEAT 4,809 HDD
- STN-1 USC00283291
- BOOK-PART 4/6 fields
Nearest mean-temperature peer: Parkersburg, WV (+ 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 NJ station list.
- Glassboro (this station) 55°F
- Hot Gallipolis, OH 55°F
- Near Parkersburg, WV 55°F
- Near Plainfield, NJ 55°F
- Near Gimlet, KY 55°F
Climate Living Index · Glassboro
Glassboro: 68/100 · grade C
Glassboro publishes 3 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 3 missing weights rescale to 100.
PlainClimate-derived for Glassboro, not an official NOAA rating. Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Normal heat + freeze calendar | 97 calendar days | 77/100 · B |
| Frost-free season | 207 days/year | 69/100 · C |
| Annual temperature balance | 54.9°F · 12.6° from 67.5°F | 59/100 · C |
Glassboro · 2026-08-04 · NOAA NCEI Climate Normals · method .
National standing · heating-led station
Where Glassboro sits across the climate record
Available NOAA 1991–2020 fields for Glassboro are ranked only against stations that publish the same field, missing metrics stay blank rather than estimated.
- Annual temperature
- 60th percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Seasonal temperature swing
- 52nd percentile swing
- Typical seasonal amplitude versus 6,861 complete station-years.
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 41°F (5°C) | 25°F (-4°C) | 33°F (1°C) | N/A | 25.2 | 0.0 |
| February | 44°F (7°C) | 26°F (-3°C) | 35°F (2°C) | N/A | 20.8 | 0.0 |
| March | 52°F (11°C) | 33°F (1°C) | 43°F (6°C) | N/A | 15.7 | 0.0 |
| April | 64°F (18°C) | 41°F (5°C) | 53°F (11°C) | N/A | 3.3 | 0.2 |
| May | 73°F (23°C) | 52°F (11°C) | 62°F (17°C) | N/A | 0.0 | 1.4 |
| June | 82°F (28°C) | 62°F (17°C) | 72°F (22°C) | N/A | 0.0 | 4.6 |
| July | 87°F (30°C) | 67°F (20°C) | 77°F (25°C) | N/A | 0.0 | 9.3 |
| August | 85°F (29°C) | 66°F (19°C) | 75°F (24°C) | N/A | 0.0 | 4.0 |
| September | 79°F (26°C) | 60°F (15°C) | 69°F (21°C) | N/A | 0.0 | 0.4 |
| October | 67°F (19°C) | 46°F (8°C) | 56°F (13°C) | N/A | 1.0 | 0.0 |
| November | 55°F (13°C) | 37°F (3°C) | 46°F (8°C) | N/A | 12.6 | 0.0 |
| December | 46°F (8°C) | 30°F (-1°C) | 38°F (3°C) | N/A | 21.3 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 87°F around July 9, short of 90°F on every date, while 97 dates carry a normal low at or below freezing, the coldest 24°F near January 28.
The freezing stretch
The normal low stays at or below 32°F into March 11, then returns to freezing around December 6, covering 97 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.
The widest day
April 17 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 Glassboro.
Where Glassboro Stands Nationally
Days and nights track unusually close together; the widest normal swing, about 23°F, is narrower than most stations record.
Glassboro 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
Frost Dates & Growing Season
First Fall Freeze
November 1
50% probability date
Last Spring Freeze
April 8
50% probability date
Growing Season
207 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
4,809
Higher = more heating needed
Cooling Degree Days
1,168
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside NJ closest to Glassboro 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).
- Booneville, KY 55°F · 0.0°F off
- California, MO 55°F · 0.0°F off
- Cave Junction, OR 55°F · 0.0°F off
- Clendenin, WV 55°F · 0.0°F off
Data-derived climate profile
How Glassboro's climate pattern fits together
heating led · mid swing
Glassboro's energy balance leans toward cold weather: 4,809 annual heating degree days against 1,168 for cooling. Its 43.8°F seasonal range still makes the monthly rows more useful than the annual average alone.
Glassboro's frost-free season lasts about 207 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 Glassboro's middle-range seasonal profile. The measured spread is 43.8°F. The annual average is 55°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
A moisture-range label is withheld because Glassboro's annual precipitation total is unavailable. Monthly source values remain visible where NOAA provides them, and no annual amount is reconstructed from incomplete data.
These labels group NOAA 1991-2020 normals from Glassboro'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 Glassboro, not an official NOAA class or a year-ahead forecast.
Questions about Glassboro's climate
How cold does Glassboro get in winter? ▼
How much energy does heating and cooling require in Glassboro? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Glassboro's primary station: GLASSBORO 2 NE (USC00283291). 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 3426340). Match rule for Glassboro: 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 Glassboro 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.