Annandale has chilly winters and warm summers, with plenty of rain
A typical July afternoon reaches 86°, a January night drops to 20°, and about 27 inches of snow falls in a normal winter.
A year in Annandale at a glance
Each month’s typical high and low, and what it brings.
What stands out about Annandale’s climate
Read from where Annandale sits among New Jersey’s towns. The page puts what stands out first.
Warmer than it used to be
The last 30 years in Annandale averaged 2.4° warmer than the 1900s. The biggest change is in December (+4.1°).
A bigger shift than in 99% of U.S. towns.
Change by month
About 179 frost-free days a year
In half of years the last 32° night comes by April 24 and the first by October 21.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
What a year in Annandale feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
27 inches of snow, 48 of rain and melt
July is the wettest month and February the driest. Rain or snow falls on about 127 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Living with Annandale’s climate
What the numbers mean for a garden, a driveway, a furnace and a free afternoon.
179 frost-free days. The last frost comes by Apr 24 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 21.
About 27" a winter over 8 days with an inch or more, most in February.
Months averaging under 55° run from October through April. Heating is 86% of the year’s heating-and-cooling load.
About 21 days a year reach 90°, and July afternoons average 86°.
The nicest months are May, June, August, September and October.
Parks & trails →Normals are averages. Ice storms, nor’easters, floods and heat waves are on the natural hazards page.
Natural hazards →Annandale and its neighbors
High Bridge has the coldest January nights next door (20°) and Clinton the hottest July afternoons (86°). Tap a town to see its climate.
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.
How Annandale compares
Against every U.S. town on TownTapestry, each counted once, with its place in New Jersey.
Annandale 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 | 38° | 20° | 3.5" | 6.2" | 11 | 20° – 37° |
| February | 41° | 22° | 2.8" | 9.4" | 9 | 20° – 38° |
| March | 50° | 29° | 4.0" | 5.7" | 11 | 33° – 48° |
| April | 63° | 38° | 3.9" | 0.9" | 12 | 46° – 55° |
| May | 72° | 48° | 4.1" | 0 | 13 | 56° – 65° |
| June | 81° | 57° | 4.4" | 0 | 12 | 65° – 72° |
| July | 86° | 62° | 4.9" | 0 | 11 | 69° – 78° |
| August | 84° | 60° | 4.7" | 0 | 11 | 67° – 75° |
| September | 77° | 54° | 4.5" | 0 | 9 | 63° – 69° |
| October | 65° | 42° | 4.3" | 0 | 10 | 48° – 61° |
| November | 54° | 33° | 3.3" | 0.4" | 9 | 38° – 48° |
| December | 43° | 26° | 4.2" | 4.5" | 11 | 27° – 45° |
| Year | 63° | 41° | 48.5" | 27.1" | 127 |
Heating and cooling a home in Annandale
86% of the work is heating, so the furnace matters far more than the air conditioner.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. Source: NOAA station normals.
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 20° to 38°. September is the most reliable, staying within 7°.
Common questions about Annandale’s climate
What is the coldest month in Annandale?
January, with a typical high of 38° and a low of 20°.
What is the hottest month in Annandale?
July, with a typical high of 86° and a low of 62°. About 21 days a year reach 90°.
How much snow does Annandale get?
About 27 inches in a normal winter, most of it in February.
When is the first frost in Annandale?
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 Annandale?
July, with 4.9 inches of rain and melted snow. The year totals 48 inches.
Neighbors talk weather
Gardens, snow, and the best days of the year in Annandale.
Your answer becomes a post in Town Square.
Temperatures and rainfall come from NOAA’s gridded climate normals for Annandale itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Flemington 5 Nnw, NJ (5 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000. Today’s forecast: National Weather Service.