Lawrenceville has chilly, snowy winters and pleasant summers
A typical July afternoon reaches 82°, a January night drops to 15°, and about 38 inches of snow falls in a normal winter.
A year in Lawrenceville at a glance
Each month’s typical high and low, and what it brings.
What stands out about Lawrenceville’s climate
Read from where Lawrenceville sits among Pennsylvania’s towns. The page puts what stands out first.
38 inches of snow, 37 of rain and melt
September is the wettest month and February the driest. Rain or snow falls on about 155 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
About 155 frost-free days a year
In half of years the last 32° night comes by May 9 and the first by October 12.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
Warmer than it used to be
The last 30 years in Lawrenceville averaged 0.8° warmer than the 1900s. The biggest change is in December (+2.6°).
A smaller shift than in 82% of U.S. towns.
Change by month
Living with Lawrenceville’s climate
What the numbers mean for a garden, a driveway, a furnace and a free afternoon.
155 frost-free days. The last frost comes by May 9 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 12.
About 38" a winter over 13 days with an inch or more, most in January. Snow covers the ground about 53 days a year.
Months averaging under 55° run from October through April. Heating is 94% of the year’s heating-and-cooling load.
About 8 days a year reach 90°, and July afternoons average 82°.
The nicest months are May, June, July, August and September.
Parks & trails →Normals are averages. Ice storms, nor’easters, floods and heat waves are on the natural hazards page.
Natural hazards →What a year in Lawrenceville feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
Lawrenceville and its neighbors
Lawrence has the coldest January nights next door (15°) and Lawrence the hottest July afternoons (82°). 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 Lawrenceville compares
Against every U.S. town on TownTapestry, each counted once, with its place in Pennsylvania.
Lawrenceville 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 | 33° | 15° | 2.2" | 9.5" | 15 | 17 | 15° – 32° |
| February | 36° | 16° | 1.7" | 9.1" | 12 | 14 | 11° – 34° |
| March | 44° | 23° | 2.7" | 6.7" | 13 | 9 | 27° – 46° |
| April | 58° | 32° | 3.2" | 1.7" | 13 | 1 | 40° – 51° |
| May | 70° | 43° | 3.2" | 0 | 14 | 0 | 50° – 62° |
| June | 78° | 52° | 3.8" | 0 | 13 | 0 | 62° – 69° |
| July | 82° | 57° | 3.7" | 0 | 12 | 0 | 65° – 73° |
| August | 80° | 55° | 3.6" | 0 | 11 | 0 | 64° – 71° |
| September | 73° | 49° | 4.0" | 0 | 11 | 0 | 57° – 65° |
| October | 61° | 38° | 3.5" | 0.2" | 14 | 0 | 45° – 56° |
| November | 48° | 30° | 2.7" | 2.3" | 12 | 3 | 34° – 44° |
| December | 37° | 22° | 2.5" | 8.5" | 14 | 10 | 21° – 41° |
| Year | 58° | 36° | 36.5" | 38.0" | 155 | 53 |
Heating and cooling a home in Lawrenceville
94% 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 11° to 34°. June is the most reliable, staying within 7°.
Common questions about Lawrenceville’s climate
What is the coldest month in Lawrenceville?
January, with a typical high of 33° and a low of 15°.
What is the hottest month in Lawrenceville?
July, with a typical high of 82° and a low of 57°. About 8 days a year reach 90°.
How much snow does Lawrenceville get?
About 38 inches in a normal winter, most of it in January.
When is the first frost in Lawrenceville?
In half of years the first 32° night comes by October 12, and the last spring frost by May 9.
What is the rainiest month in Lawrenceville?
September, with 4.0 inches of rain and melted snow. The year totals 37 inches.
Neighbors talk weather
Gardens, snow, and the best days of the year in Lawrenceville.
Your answer becomes a post in Town Square.
Temperatures and rainfall come from NOAA’s gridded climate normals for Lawrenceville itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Cowanesque Dam, PA (1 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.