Photo: Beyond My Ken · CC BY-SA 4.0July in Petersburgh stays fresher than in 92% of U.S. towns
Deep winter brings January lows near 14°. The year swings widely: the coldest month’s nights and the warmest month’s afternoons are 66° apart. Winter nights are cold: in January they are colder than in 88% of U.S. towns. Radiators earn their keep from October to April, the months that average under 50°.
A year in Petersburgh at a glance
Each month’s typical high and low, and what it brings.
What stands out about Petersburgh’s climate
Compared with towns across the U.S., with Petersburgh’s place in New York beside it.
What a year in Petersburgh feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 154 frost-free days a year
In half of years the last 32° night comes by May 7 and the first by October 8. Frost and day counts come from NOAA’s station at Pownal 1 Ne, VT, 5 miles from the town’s center, at about the same height.
The 2023 USDA map puts Petersburgh’s center in zone 5b: the coldest night of a typical winter, averaged over 1991–2020, reaches about −13°. 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 75 inches of snow a winter
Snow, measured at Sunderland 2, VT, falls mostly in January and December. Precipitation (rain plus melted snow) adds up to 45 inches a year; June 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 Petersburgh
95% 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 Pownal 1 Ne, VT.
Living with Petersburgh’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
154 frost-free days in zone 5b. The last frost comes by May 7 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 8.
Months with highs of 62–84° and lows of 40° or more: May, June, July, August and September. 24 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Petersburgh from natural hazards, river flooding is the largest share (83%); heat waves, cold waves, winter storms and ice storms together are 3%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Petersburgh and its neighbors
Grafton has the coldest January nights next door (12°, 1° colder) and Hoosick the hottest July afternoons (82°, 2° 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 Petersburgh’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 |
|---|---|---|---|---|
| Petersburgh, NY | 14° | 80° | 45" | 75" |
| Bradford, PA | 15° | 80° | 44" | 75" |
| Brewer, ME | 10° | 80° | 44" | 75" |
| Frostburg, MD | 20° | 82° | 44" | 72" |
| Cortland, OH | 18° | 83° | 43" | 68" |
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 Petersburgh averaged 1.7° warmer than the 1900s. The biggest change is in December (+3.3°).
A bigger shift than in 71% 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 Petersburgh compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Petersburgh’s place among New York’s.
Petersburgh weather by month
Highs, lows and precipitation from NOAA’s grid at Petersburgh’s center; snow, wet days and snow on the ground from Sunderland 2, VT. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 31° | 14° | 3.0" | 18.5" | 14 | 23 | 11° – 30° |
| February | 33° | 15° | 2.4" | 16.4" | 11 | 21 | 10° – 30° |
| March | 42° | 23° | 3.0" | 14.0" | 13 | 15 | 25° – 43° |
| April | 55° | 33° | 3.3" | 4.1" | 12 | 3 | 39° – 49° |
| May | 67° | 44° | 3.8" | 0.0" | 14 | 0 | 50° – 62° |
| June | 76° | 53° | 4.5" | 0.0" | 13 | 0 | 61° – 69° |
| July | 80° | 58° | 4.4" | 0.0" | 13 | 0 | 64° – 73° |
| August | 78° | 56° | 4.3" | 0.0" | 11 | 0 | 64° – 71° |
| September | 71° | 49° | 4.5" | 0.0" | 11 | 0 | 56° – 64° |
| October | 59° | 39° | 4.1" | 0.7" | 13 | 1 | 43° – 56° |
| November | 47° | 29° | 3.4" | 4.1" | 12 | 4 | 33° – 43° |
| December | 36° | 20° | 3.6" | 17.4" | 14 | 17 | 20° – 40° |
| Year | 56° | 36° | 44.5" | 75.2" | 153 | 83 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 10° to 30°. August is the most reliable, staying within 7°.
Where Petersburgh’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 Petersburgh’s center.
- Snow: Sunderland 2, VT.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Pownal 1 Ne, VT, 5 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 Petersburgh’s climate
What is the weather like in Petersburgh?
A typical July afternoon reaches 80°, a January night drops to 14°, and about 75 inches of snow falls in a normal winter. Colder January nights than 88% of U.S. towns; cooler July afternoons than 92% of U.S. towns.
How cold does it get in Petersburgh in winter?
January nights average 14°. About 157 nights a year reach 32° or below and 14 reach 0° or below. In the coldest January of the last 30 years the month averaged 11°.
How much snow does Petersburgh get?
About 75 inches in a normal winter at Sunderland 2, VT, most of it in January and December, with snow on the ground about 83 days a year.
How hot does it get in Petersburgh?
July, with a typical high of 80° and a low of 58°. About 3 days a year reach 90° (Pownal 1 Ne, VT).
When is the first and last frost in Petersburgh?
In half of years the last spring frost (32°) comes by May 7 and the first fall frost by October 8, about 154 frost-free days, at Pownal 1 Ne, VT.
What growing zone is Petersburgh in?
Zone 5b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −13°.
What is the best time of year to visit Petersburgh?
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 Petersburgh getting warmer?
Yes: 1991–2020 averaged 1.7° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 71% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Petersburgh.
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.