Glen Gardner, NJ climate
Glen Gardner has chilly winters and warm summers, with plenty of rain. A typical July afternoon reaches 84°, a January night drops to 20°, and about 30 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Glen Gardner feels like
Winter
Spring
Summer
Fall
Glen Gardner weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 37° | 20° | 3.6" | 7.4" | 11 | 11 | 19° – 36° |
| February | 40° | 22° | 2.8" | 10.3" | 8 | 14 | 19° – 37° |
| March | 49° | 28° | 4.0" | 5.8" | 10 | 6 | 32° – 48° |
| April | 62° | 38° | 3.9" | 0.7" | 10 | 0 | 45° – 54° |
| May | 71° | 48° | 4.1" | 0 | 12 | 0 | 55° – 64° |
| June | 79° | 57° | 4.6" | 0 | 12 | 0 | 64° – 71° |
| July | 84° | 62° | 4.9" | 0 | 11 | 0 | 68° – 77° |
| August | 82° | 60° | 4.8" | 0 | 10 | 0 | 67° – 74° |
| September | 76° | 53° | 4.6" | 0 | 9 | 0 | 62° – 68° |
| October | 64° | 42° | 4.4" | 0.3" | 9 | 0 | 48° – 60° |
| November | 53° | 33° | 3.5" | 0.3" | 9 | 0 | 38° – 48° |
| December | 42° | 25° | 4.4" | 4.8" | 10 | 5 | 26° – 44° |
| Year | 62° | 40° | 49.6" | 29.6" | 120 | 37 |
“Wet days” have at least 0.01" of rain or melted snow. “Snow on ground” counts days with 1" or more. The 30-year range is the coldest and warmest that month’s average temperature got between 1991 and 2020.
Rain and snow in Glen Gardner
Glen Gardner gets 50 inches of rain and melted snow a year. July is the wettest month and February the driest. Rain or snow falls on about 120 days a year. Snow covers the ground about 37 days of the year.
About 179 frost-free days a year
In half of years the last 32° night comes by April 24 and the first one by October 21. That leaves about 179 frost-free days for gardens, longer than 51% of U.S. towns.
Heating and cooling a home in Glen Gardner
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Glen Gardner, 86% of that work is heating and 14% is cooling, so the furnace matters far more than the air conditioner.
Degree days measure how far each day’s average temperature falls below or rises above 65°, added up over a year. Source: NOAA station normals.
Glen Gardner and its neighbors
Glen Gardner borders 3 towns with climate data. January nights across them vary by 0.7°. Lebanon has the coldest January nights (19°) and Hampton the hottest July afternoons (84°). Glen Gardner’s January low is 20° and its July high 84°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Glen Gardner compares
Compared with every U.S. town and city on TownTapestry, each counted once.
Warmer than it used to be
The last 30 years in Glen Gardner averaged 2.4° warmer than the 1900s. The biggest change is in December (+4.1°). The shift is larger than in 99% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Glen Gardner’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. February swings the most: between 1991 and 2020 its average temperature ranged from 19° to 37°. September is the most reliable, staying within 7°.
Common questions about Glen Gardner’s climate
What is the coldest month in Glen Gardner?
January, with a typical high of 37° and a low of 20°.
What is the hottest month in Glen Gardner?
July, with a typical high of 84° and a low of 62°. About 21 days a year reach 90°.
How much snow does Glen Gardner get?
About 30 inches in a normal winter, most of it in February.
When is the first frost in Glen Gardner?
In half of years the first 32° night comes by October 21, and the last spring frost by April 24.
What is the rainiest month in Glen Gardner?
July, with 4.9 inches of rain and melted snow. The year totals 50 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Glen Gardner itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Pottersville 2 Nnw, NJ (11 mi, snow) and Flemington 5 Nnw, NJ (9 mi, frost, heat and degree days). Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.