Photo: Nyttend · Public domainAfternoon heat in Sylvania Township trails that of 88% of U.S. towns
Midwinter brings lows of about 16°. By January nights alone, it runs colder than 81% of U.S. towns. Since 1901–2000, the year has warmed by 0.7°, most of all in December. Long walks are most pleasant from May to September, when afternoons reach 70–81°.
A year in Sylvania Township at a glance
Each month’s typical high and low, and what it brings.
What stands out about Sylvania Township’s climate
Compared with towns across the U.S., with Sylvania Township’s place in Pennsylvania beside it.
What a year in Sylvania Township feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 143 frost-free days a year
In half of years the last 32° night comes by May 14 and the first by October 4. Frost and day counts come from NOAA’s station at Coudersport 7se, PA, 9 miles from the town’s center, 310 ft higher.
The 2023 USDA map puts Sylvania Township’s center in zone 5b: the coldest night of a typical winter, averaged over 1991–2020, reaches about −12°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
About 39 inches of snow a winter
Snow, measured at Stevenson Dam, PA, is heaviest from January through February, about 11 inches a month. Precipitation (rain plus melted snow) adds up to 44 inches a year; July is the wettest month and February the driest. Rain or snow falls on about 153 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Sylvania Township
97% 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 Coudersport 7se, PA.
Living with Sylvania Township’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
143 frost-free days in zone 5b. The last frost comes by May 14 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 4.
Months with highs of 62–84° and lows of 40° or more: May, June, July, August and September. 13 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Sylvania Township from natural hazards, river flooding is the largest share (90%); heat waves, cold waves, winter storms and ice storms together are 2%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Sylvania Township and its neighbors
Summit Township has the coldest January nights next door (14°, 2° colder). Differences under a degree are within what the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Sylvania 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 |
|---|---|---|---|---|
| Sylvania Township, PA | 16° | 81° | 44" | 39" |
| Durham, NH | 16° | 81° | 47" | 39" |
| Coeymans, NY | 15° | 82° | 44" | 46" |
| Great Barrington, MA | 14° | 82° | 45" | 50" |
| Aurora, OH | 19° | 82° | 42" | 45" |
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 Sylvania Township averaged 0.7° warmer than the 1900s. The biggest change is in December (+2.1°).
A smaller shift than in 95% 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 Sylvania Township compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Sylvania Township’s place among Pennsylvania’s.
Sylvania Township weather by month
Highs, lows and precipitation from NOAA’s grid at Sylvania Township’s center; snow, wet days and snow on the ground from Stevenson Dam, PA. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 32° | 16° | 3.2" | 10.7" | 15 | 19 | 16° – 33° |
| February | 36° | 16° | 2.5" | 10.7" | 12 | 17 | 12° – 35° |
| March | 45° | 23° | 3.0" | 5.7" | 12 | 9 | 27° – 46° |
| April | 59° | 33° | 3.8" | 1.0" | 13 | 1 | 40° – 51° |
| May | 70° | 43° | 3.9" | 0.0" | 14 | 0 | 50° – 63° |
| June | 77° | 52° | 4.4" | 0.0" | 13 | 0 | 61° – 68° |
| July | 81° | 56° | 4.6" | 0.0" | 12 | 0 | 64° – 72° |
| August | 80° | 55° | 3.9" | 0.0" | 11 | 0 | 63° – 71° |
| September | 72° | 49° | 4.3" | 0.0" | 11 | 0 | 58° – 64° |
| October | 60° | 38° | 3.8" | 0.1" | 13 | 0 | 45° – 56° |
| November | 47° | 29° | 3.4" | 1.8" | 12 | 2 | 33° – 43° |
| December | 37° | 22° | 3.3" | 8.6" | 14 | 10 | 20° – 38° |
| Year | 58° | 36° | 44.1" | 38.6" | 153 | 58 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 12° to 35°. September is the most reliable, staying within 5°.
Where Sylvania 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 Sylvania Township’s center.
- Snow: Stevenson Dam, PA.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Coudersport 7se, PA, 9 miles from the town’s center, 310 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 Sylvania Township’s climate
What is the weather like in Sylvania Township?
A typical July afternoon reaches 81°, a January night drops to 16°, and about 39 inches of snow falls in a normal winter. Colder January nights than 81% of U.S. towns; cooler July afternoons than 88% of U.S. towns.
How cold does it get in Sylvania Township in winter?
January nights average 16°. About 162 nights a year reach 32° or below and 10 reach 0° or below. In the coldest January of the last 30 years the month averaged 16°.
How much snow does Sylvania Township get?
About 39 inches in a normal winter at Stevenson Dam, PA, heaviest from January through February, about 11 inches a month, with snow on the ground about 58 days a year.
How hot does it get in Sylvania Township?
July, with a typical high of 81°. 90° days are rare: none in a normal year at Coudersport 7se, PA.
When is the first and last frost in Sylvania Township?
In half of years the last spring frost (32°) comes by May 14 and the first fall frost by October 4, about 143 frost-free days, at Coudersport 7se, PA.
What growing zone is Sylvania Township in?
Zone 5b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −12°.
What is the best time of year to visit Sylvania 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 Sylvania Township getting warmer?
Yes: 1991–2020 averaged 0.7° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 95% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Sylvania 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.