Hess, Harold, Lustron House · Photo: JERRYE & ROY KLOTZ MD · CC BY-SA 4.0Wet weather: 48 inches of rain and melted snow a year in Closter, more than in 75% of U.S. towns
On a normal January night the air cools to about 23°. December has warmed most since 1901–2000, part of a 2.2° rise. Tender plants can go out after about April 20; in half of years the first frost comes by October 26.
A year in Closter at a glance
Each month’s typical high and low, and what it brings.
What stands out about Closter’s climate
Compared with towns across the U.S., with Closter’s place in New Jersey beside it.
What a year in Closter feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 189 frost-free days a year
In half of years the last 32° night comes by April 20 and the first by October 26. Frost and day counts come from NOAA’s station at Dobbs Ferry-ardsley, NY, 7 miles from the town’s center, 160 ft higher.
The 2023 USDA map puts Closter’s center in zone 7a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 5°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
About 33 inches of snow a winter
Snow, measured at Dobbs Ferry-ardsley, NY, falls mostly in February. Precipitation (rain plus melted snow) adds up to 48 inches a year; August is the wettest month and February the driest. Rain or snow falls on about 124 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Closter
85% of the work is heating. Months averaging under 55° run from November through April.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Dobbs Ferry-ardsley, NY.
Living with Closter’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
189 frost-free days in zone 7a. The last frost comes by Apr 20 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Oct 26.
Months with highs of 62–84° and lows of 40° or more: April, May, June, September and October. 3.3 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Closter from natural hazards, river flooding is the largest share (74%); heat waves, cold waves, winter storms and ice storms together are 7%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Closter and its neighbors
Every town next door is within a degree of Closter in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Closter’s, farther away
TownRatings’ own comparison of NOAA 1991–2020 normals, not a NOAA product: places of 5,000+ at least 150 miles away, one per state, closest on January low, July high, precipitation and snow.
| Town | Jan. low | July high | Precip. | Snow |
|---|---|---|---|---|
| Closter, NJ | 23° | 87° | 48" | 33" |
| Reisterstown, MD | 23° | 86° | 48" | 34" |
| Charleston, WV | 25° | 87° | 46" | 32" |
| Gettysburg, PA | 22° | 87° | 45" | 27" |
| Walton, KY | 23° | 86° | 47" | 23" |
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value. Snow and frost-free days come from the nearest weather station, so neighbors often share them.
Warmer than it used to be
The last 30 years in Closter averaged 2.2° warmer than the 1900s. The biggest change is in December (+3.7°).
A bigger shift than in 94% of U.S. towns.
Change by month
The two periods overlap (1991–2000 is in both), which makes the gap a little smaller than it would be between separate periods.
How Closter compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Closter’s place among New Jersey’s.
Closter weather by month
Highs, lows and precipitation from NOAA’s grid at Closter’s center; snow, wet days and snow on the ground from Dobbs Ferry-ardsley, NY. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 39° | 23° | 3.3" | 9.4" | 11 | 13 | 22° – 38° |
| February | 42° | 24° | 2.8" | 10.9" | 9 | 13 | 21° – 39° |
| March | 50° | 31° | 4.1" | 5.8" | 11 | 7 | 35° – 50° |
| April | 62° | 41° | 3.9" | 0.7" | 13 | 0 | 47° – 56° |
| May | 72° | 51° | 3.9" | 0.0" | 12 | 0 | 57° – 67° |
| June | 81° | 60° | 4.4" | 0.0" | 12 | 0 | 67° – 74° |
| July | 87° | 66° | 4.4" | 0.0" | 10 | 0 | 71° – 80° |
| August | 84° | 64° | 4.5" | 0.0" | 9 | 0 | 70° – 78° |
| September | 77° | 57° | 4.3" | 0.0" | 9 | 0 | 64° – 71° |
| October | 66° | 45° | 4.4" | 0.0" | 9 | 0 | 51° – 62° |
| November | 54° | 36° | 3.6" | 0.3" | 10 | 0 | 40° – 50° |
| December | 44° | 29° | 4.2" | 5.6" | 11 | 7 | 29° – 48° |
| Year | 63° | 44° | 47.8" | 32.7" | 124 | 39 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 21° to 39°. June is the most reliable, staying within 6°.
Where Closter’s numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s gridded 1991–2020 normals for the 5 km cell at Closter’s center.
- Snow: Dobbs Ferry-ardsley, NY.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Dobbs Ferry-ardsley, NY, 7 miles from the town’s center, 160 ft higher; the nearest station that passes our checks for distance, height and agreement with the grid.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Then and now: NOAA’s gridded normals for 1901–2000 at the same cell.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Closter’s climate
What is the weather like in Closter?
A typical July afternoon reaches 87°, a January night drops to 23°, and about 33 inches of snow falls in a normal winter. Milder January nights than 56% of U.S. towns; hotter July afternoons than 59% of U.S. towns.
How cold does it get in Closter in winter?
January nights average 23°. About 109 nights a year reach 32° or below. In the coldest January of the last 30 years the month averaged 22°.
How much snow does Closter get?
About 33 inches in a normal winter at Dobbs Ferry-ardsley, NY, most of it in February, with snow on the ground about 39 days a year.
How hot does it get in Closter?
July, with a typical high of 87° and a low of 66°. About 19 days a year reach 90° (Dobbs Ferry-ardsley, NY).
When is the first and last frost in Closter?
In half of years the last spring frost (32°) comes by April 20 and the first fall frost by October 26, about 189 frost-free days, at Dobbs Ferry-ardsley, NY.
What growing zone is Closter in?
Zone 7a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 5°.
What is the best time of year to visit Closter?
By one simple rule (highs of 62–84° and lows of 40° or more), April, May, June, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Closter getting warmer?
Yes: 1991–2020 averaged 2.2° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 94% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Closter.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.