Photo: Mr. Matté (if there is an issue with this image, contact me using this image's Commons talk page, my Commons user talk page, or my English Wikipedia user talk page; I'll know about it a lot faster) · CC BY-SA 4.0Summer arrives softly in Laboratory, cooler than in 74% of U.S. towns
On a normal January night the air cools to about 21°. The seasons are far apart: from a winter night to a summer afternoon the average spans 62°. Picnics, hikes and garden evenings come into their own from May to October, with highs of 64–83°.
A year in Laboratory at a glance
Each month’s typical high and low, and what it brings.
What stands out about Laboratory’s climate
Compared with towns across the U.S., with Laboratory’s place in Pennsylvania beside it.
What a year in Laboratory feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 181 frost-free days a year
In half of years the last 32° night comes by April 24 and the first by October 23. Frost and day counts come from NOAA’s station at Washington 3 Ne, PA, 2.4 miles from the town’s center, at about the same height.
The 2023 USDA map puts Laboratory’s center in zone 6b: the coldest night of a typical winter, averaged over 1991–2020, reaches about −4°. 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 32 inches of snow a winter
Snow, measured at Washington 3 Ne, PA, falls mostly in January. Precipitation (rain plus melted snow) adds up to 43 inches a year; May is the wettest month and February the driest. Rain or snow falls on about 154 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Laboratory
88% of the work is heating, so the furnace matters far more than the air conditioner. Months averaging under 55° run from October 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 Washington 3 Ne, PA.
Living with Laboratory’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
181 frost-free days in zone 6b. 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 23.
Months with highs of 62–84° and lows of 40° or more: May, June, July, August, September and October.
Parks & trails →Of the yearly building losses FEMA expects in Laboratory from natural hazards, river flooding is the largest share (91%); heat waves, cold waves, winter storms and ice storms together are 1%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Laboratory and its neighbors
Every town next door is within a degree of Laboratory in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Laboratory’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 |
|---|---|---|---|---|
| Laboratory, PA | 21° | 83° | 43" | 32" |
| Bellefontaine, OH | 19° | 83° | 42" | 26" |
| Kokomo, IN | 18° | 84° | 42" | 34" |
| Riverhead, NY | 23° | 83° | 46" | 27" |
| Ledyard, CT | 21° | 82° | 47" | 28" |
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 Laboratory averaged 1.1° warmer than the 1900s. The biggest change is in December (+2.5°).
A smaller shift than in 68% 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 Laboratory compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Laboratory’s place among Pennsylvania’s.
Laboratory weather by month
Highs, lows and precipitation from NOAA’s grid at Laboratory’s center; snow, wet days and snow on the ground from Washington 3 Ne, PA. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 37° | 21° | 3.4" | 9.9" | 16 | 14 | 21° – 38° |
| February | 41° | 23° | 2.7" | 7.5" | 13 | 12 | 19° – 40° |
| March | 50° | 30° | 3.6" | 6.1" | 13 | 6 | 33° – 51° |
| April | 63° | 39° | 3.6" | 0.6" | 14 | 0 | 45° – 56° |
| May | 72° | 48° | 4.4" | 0.0" | 14 | 0 | 54° – 67° |
| June | 80° | 57° | 4.4" | 0.0" | 13 | 0 | 64° – 71° |
| July | 83° | 61° | 4.1" | 0.0" | 12 | 0 | 68° – 76° |
| August | 82° | 60° | 3.7" | 0.0" | 10 | 0 | 66° – 75° |
| September | 75° | 53° | 3.5" | 0.0" | 10 | 0 | 61° – 69° |
| October | 64° | 42° | 3.0" | 0.0" | 11 | 0 | 49° – 59° |
| November | 52° | 33° | 2.9" | 1.8" | 12 | 2 | 36° – 48° |
| December | 41° | 26° | 3.3" | 6.0" | 15 | 8 | 23° – 45° |
| Year | 62° | 41° | 42.6" | 31.9" | 154 | 41 |
How much a month can swing
A normal is an average. December swings the most: from 1991 to 2020 its average ranged from 23° to 45°. June is the most reliable, staying within 7°.
Where Laboratory’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 Laboratory’s center.
- Snow: Washington 3 Ne, PA.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Washington 3 Ne, PA, 2.4 miles from the town’s center, at about the same height; 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 Laboratory’s climate
What is the weather like in Laboratory?
A typical July afternoon reaches 83°, a January night drops to 21°, and about 32 inches of snow falls in a normal winter. Colder January nights than 56% of U.S. towns; cooler July afternoons than 74% of U.S. towns.
How cold does it get in Laboratory in winter?
January nights average 21°. About 122 nights a year reach 32° or below and 3 reach 0° or below. In the coldest January of the last 30 years the month averaged 21°.
How much snow does Laboratory get?
About 32 inches in a normal winter at Washington 3 Ne, PA, most of it in January, with snow on the ground about 41 days a year.
How hot does it get in Laboratory?
July, with a typical high of 83° and a low of 61°. About 6 days a year reach 90° (Washington 3 Ne, PA).
When is the first and last frost in Laboratory?
In half of years the last spring frost (32°) comes by April 24 and the first fall frost by October 23, about 181 frost-free days, at Washington 3 Ne, PA.
What growing zone is Laboratory in?
Zone 6b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −4°.
What is the best time of year to visit Laboratory?
By one simple rule (highs of 62–84° and lows of 40° or more), May, June, July, August, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Laboratory getting warmer?
Yes: 1991–2020 averaged 1.1° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 68% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Laboratory.
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.