Photo: Nicholas · CC BY 2.0Afternoon heat in Cooper Township trails that of 84% of U.S. towns
In January the night’s low is typically 18°. Precipitation peaks in September and eases off in February. Winter nights are cold: in January they are colder than in 71% of U.S. towns. Homes need heating from November to April, the months averaging under 50°.
A year in Cooper Township at a glance
Each month’s typical high and low, and what it brings.
What stands out about Cooper Township’s climate
Compared with towns across the U.S., with Cooper Township’s place in Pennsylvania beside it.
What a year in Cooper Township feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 130 frost-free days a year
In half of years the last 32° night comes by May 21 and the first by September 27. Frost and day counts come from NOAA’s station at Clarence, PA, 10 miles from the town’s center, 120 ft lower.
The 2023 USDA map puts Cooper Township’s center in zone 6a: the coldest night of a typical winter, averaged over 1991–2020, reaches about −6°. 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 50 inches of snow a winter
Snow, measured at Clarence, PA, falls mostly in January. Precipitation (rain plus melted snow) adds up to 43 inches a year; September is the wettest month and February the driest. Rain or snow falls on about 157 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Cooper Township
96% 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 Clarence, PA.
Living with Cooper Township’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
130 frost-free days in zone 6a. The last frost comes by May 21 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Sep 27.
Months with highs of 62–84° and lows of 40° or more: May, June, July, August and September. 5.5 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Cooper Township from natural hazards, river flooding is the largest share (62%); heat waves, cold waves, winter storms and ice storms together are 12%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Cooper Township and its neighbors
Rush Township has the coldest January nights next door (16°, 1° colder) and Karthaus Township the hottest July afternoons (83°, 1° warmer). Differences under a degree are within what the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Cooper Township’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 |
|---|---|---|---|---|
| Cooper Township, PA | 18° | 82° | 43" | 50" |
| Ontario, OH | 17° | 82° | 42" | 49" |
| Sand Lake, NY | 15° | 82° | 43" | 53" |
| Topsfield, MA | 18° | 82° | 47" | 48" |
| South Hooksett, NH | 14° | 83° | 45" | 53" |
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 Cooper Township averaged 0.8° warmer than the 1900s. The biggest change is in December (+2.0°).
A smaller shift than in 91% 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 Cooper Township compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Cooper Township’s place among Pennsylvania’s.
Cooper Township weather by month
Highs, lows and precipitation from NOAA’s grid at Cooper Township’s center; snow, wet days and snow on the ground from Clarence, PA. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 34° | 18° | 3.0" | 12.8" | 16 | 21 | 17° – 34° |
| February | 37° | 19° | 2.5" | 11.5" | 13 | 19 | 16° – 35° |
| March | 46° | 26° | 3.4" | 11.4" | 13 | 12 | 30° – 47° |
| April | 60° | 36° | 3.8" | 1.7" | 14 | 1 | 42° – 53° |
| May | 70° | 45° | 4.0" | 0.0" | 14 | 0 | 52° – 64° |
| June | 78° | 54° | 4.2" | 0.0" | 13 | 0 | 62° – 69° |
| July | 82° | 59° | 4.1" | 0.0" | 12 | 0 | 65° – 74° |
| August | 80° | 57° | 3.9" | 0.0" | 11 | 0 | 64° – 73° |
| September | 73° | 50° | 4.2" | 0.0" | 12 | 0 | 59° – 66° |
| October | 61° | 39° | 3.6" | 0.8" | 13 | 0 | 46° – 57° |
| November | 49° | 31° | 3.2" | 3.1" | 13 | 3 | 35° – 45° |
| December | 38° | 24° | 3.3" | 9.0" | 15 | 13 | 21° – 41° |
| Year | 59° | 38° | 43.0" | 50.3" | 157 | 70 |
How much a month can swing
A normal is an average. December swings the most: from 1991 to 2020 its average ranged from 21° to 41°. June is the most reliable, staying within 7°.
Where Cooper Township’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 Cooper Township’s center.
- Snow: Clarence, PA.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Clarence, PA, 10 miles from the town’s center, 120 ft lower; 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 Cooper Township’s climate
What is the weather like in Cooper Township?
A typical July afternoon reaches 82°, a January night drops to 18°, and about 50 inches of snow falls in a normal winter. Colder January nights than 71% of U.S. towns; cooler July afternoons than 84% of U.S. towns.
How cold does it get in Cooper Township in winter?
January nights average 18°. About 175 nights a year reach 32° or below and 13 reach 0° or below. In the coldest January of the last 30 years the month averaged 17°.
How much snow does Cooper Township get?
About 50 inches in a normal winter at Clarence, PA, most of it in January, with snow on the ground about 70 days a year.
How hot does it get in Cooper Township?
July, with a typical high of 82° and a low of 59°. About 6 days a year reach 90° (Clarence, PA).
When is the first and last frost in Cooper Township?
In half of years the last spring frost (32°) comes by May 21 and the first fall frost by September 27, about 130 frost-free days, at Clarence, PA.
What growing zone is Cooper Township in?
Zone 6a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −6°.
What is the best time of year to visit Cooper Township?
By one simple rule (highs of 62–84° and lows of 40° or more), May, June, July, August and September. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Cooper Township getting warmer?
Yes: 1991–2020 averaged 0.8° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 91% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Cooper Township.
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.