Photo: Tyler A. McNeil · CC BY-SA 4.0January in Guilderland bites harder than in 86% of U.S. towns
Expect July afternoons of about 83°. In July, afternoons here are cooler than in 73% of U.S. towns. December has warmed most since 1901–2000, part of a 1.4° rise. Picnics, hikes and garden evenings come into their own from May to September, with highs of 70–83°.
A year in Guilderland at a glance
Each month’s typical high and low, and what it brings.
What stands out about Guilderland’s climate
Compared with towns across the U.S., with Guilderland’s place in New York beside it.
What a year in Guilderland feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 169 frost-free days a year
In half of years the last 32° night comes by April 27 and the first by October 15. Frost and day counts come from NOAA’s station at Albany Airport, 8 miles from the town’s center, at about the same height.
The 2023 USDA map puts Guilderland’s center in zone 6a: the coldest night of a typical winter, averaged over 1991–2020, reaches about −9°. 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 56 inches of snow a winter
Snow, measured at Albany Nwfo Univ, NY, falls mostly in January and December. Precipitation (rain plus melted snow) adds up to 40 inches a year; June is the wettest month and February the driest. Rain or snow falls on about 141 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Guilderland
90% 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 Albany Airport.
Living with Guilderland’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
169 frost-free days in zone 6a. The last frost comes by Apr 27 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 15.
Months with highs of 62–84° and lows of 40° or more: May, June, July, August and September. 48 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Guilderland from natural hazards, river flooding is the largest share (63%); heat waves, cold waves, winter storms and ice storms together are 8%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Guilderland and its neighbors
Knox has the coldest January nights next door (13°, 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 Guilderland’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 |
|---|---|---|---|---|
| Guilderland, NY | 15° | 83° | 40" | 56" |
| Plymouth, IN | 17° | 83° | 40" | 55" |
| Shelby, OH | 18° | 83° | 40" | 49" |
| Niles, MI | 18° | 83° | 40" | 63" |
| Clearfield, PA | 18° | 83° | 41" | 63" |
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 Guilderland averaged 1.4° warmer than the 1900s. The biggest change is in December (+3.2°).
A bigger shift than in 52% 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 Guilderland compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Guilderland’s place among New York’s.
Guilderland weather by month
Highs, lows and precipitation from NOAA’s grid at Guilderland’s center; snow, wet days and snow on the ground from Albany Nwfo Univ, NY. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 33° | 15° | 2.6" | 16.5" | 14 | 21 | 13° – 31° |
| February | 36° | 16° | 2.4" | 9.9" | 9 | 16 | 12° – 32° |
| March | 44° | 24° | 3.1" | 9.8" | 12 | 10 | 27° – 45° |
| April | 58° | 35° | 3.2" | 2.3" | 12 | 1 | 40° – 51° |
| May | 70° | 46° | 3.4" | 0.0" | 14 | 0 | 53° – 64° |
| June | 78° | 56° | 4.2" | 0.0" | 13 | 0 | 64° – 72° |
| July | 83° | 61° | 3.8" | 0.0" | 12 | 0 | 67° – 75° |
| August | 81° | 59° | 3.8" | 0.0" | 11 | 0 | 66° – 73° |
| September | 74° | 51° | 3.7" | 0.0" | 9 | 0 | 59° – 67° |
| October | 61° | 40° | 4.0" | 0.5" | 11 | 0 | 46° – 57° |
| November | 49° | 31° | 2.9" | 1.7" | 12 | 1 | 35° – 45° |
| December | 38° | 22° | 3.2" | 15.5" | 12 | 11 | 22° – 41° |
| Year | 59° | 38° | 40.3" | 56.2" | 141 | 61 |
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 32°. August is the most reliable, staying within 7°.
Where Guilderland’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 Guilderland’s center.
- Snow: Albany Nwfo Univ, NY.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Albany Airport, 8 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 Guilderland’s climate
What is the weather like in Guilderland?
A typical July afternoon reaches 83°, a January night drops to 15°, and about 56 inches of snow falls in a normal winter. Colder January nights than 86% of U.S. towns; cooler July afternoons than 73% of U.S. towns.
How cold does it get in Guilderland in winter?
January nights average 15°. About 136 nights a year reach 32° or below and 7 reach 0° or below. In the coldest January of the last 30 years the month averaged 13°.
How much snow does Guilderland get?
About 56 inches in a normal winter at Albany Nwfo Univ, NY, most of it in January and December, with snow on the ground about 61 days a year.
How hot does it get in Guilderland?
July, with a typical high of 83° and a low of 61°. About 10 days a year reach 90° (Albany Airport).
When is the first and last frost in Guilderland?
In half of years the last spring frost (32°) comes by April 27 and the first fall frost by October 15, about 169 frost-free days, at Albany Airport.
What growing zone is Guilderland in?
Zone 6a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −9°.
What is the best time of year to visit Guilderland?
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 Guilderland getting warmer?
Yes: 1991–2020 averaged 1.4° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 52% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Guilderland.
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.