South Bound Brook, NJ climate
South Bound Brook has chilly winters and warm summers, with plenty of rain. A typical July afternoon reaches 87°, a January night drops to 23°, and about 21 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in South Bound Brook feels like
Winter
Spring
Summer
Fall
South Bound Brook 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 | 30-yr range |
|---|---|---|---|---|---|---|
| January | 40° | 23° | 3.5" | 6.8" | 10 | 23° – 39° |
| February | 43° | 24° | 2.9" | 6.7" | 8 | 22° – 40° |
| March | 51° | 31° | 4.2" | 3.6" | 10 | 35° – 50° |
| April | 63° | 40° | 3.7" | 0.2" | 11 | 48° – 56° |
| May | 73° | 50° | 4.1" | 0 | 12 | 57° – 67° |
| June | 82° | 59° | 4.5" | 0 | 11 | 67° – 74° |
| July | 87° | 65° | 5.0" | 0 | 10 | 71° – 79° |
| August | 85° | 63° | 4.5" | 0 | 10 | 69° – 77° |
| September | 78° | 56° | 4.2" | 0 | 9 | 64° – 72° |
| October | 66° | 44° | 4.3" | 0.1" | 10 | 50° – 61° |
| November | 55° | 35° | 3.3" | 0.1" | 9 | 40° – 50° |
| December | 45° | 28° | 4.3" | 3.5" | 10 | 29° – 48° |
| Year | 64° | 43° | 48.4" | 21.0" | 121 |
“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 South Bound Brook
South Bound Brook gets 48 inches of rain and melted snow a year. July is the wettest month and February the driest. Rain or snow falls on about 121 days a year.
About 193 frost-free days a year
In half of years the last 32° night comes by April 15 and the first one by October 26. That leaves about 193 frost-free days for gardens, longer than 67% of U.S. towns.
Heating and cooling a home in South Bound Brook
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In South Bound Brook, 83% of that work is heating and 17% 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.
South Bound Brook and its neighbors
South Bound Brook borders 4 towns with climate data. January nights across them vary by 0.2°. Bound Brook has the coldest January nights (23°) and Piscataway the hottest July afternoons (87°). South Bound Brook’s January low is 23° and its July high 87°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How South Bound Brook 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 South Bound Brook averaged 2.2° warmer than the 1900s. The biggest change is in December (+3.8°). The shift is larger than in 98% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at South Bound Brook’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. December swings the most: between 1991 and 2020 its average temperature ranged from 29° to 48°. June is the most reliable, staying within 7°.
Common questions about South Bound Brook’s climate
What is the coldest month in South Bound Brook?
January, with a typical high of 40° and a low of 23°.
What is the hottest month in South Bound Brook?
July, with a typical high of 87° and a low of 65°. About 24 days a year reach 90°.
How much snow does South Bound Brook get?
About 21 inches in a normal winter, most of it in January.
When is the first frost in South Bound Brook?
In half of years the first 32° night comes by October 26, and the last spring frost by April 15.
What is the rainiest month in South Bound Brook?
July, with 5.0 inches of rain and melted snow. The year totals 48 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for South Bound Brook itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Bound Brook 2w, NJ (2 mi, snow) and New Brunswick 3 Se, NJ (8 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.