Nights turn raw in Castleton Four Corners each January, colder than in 93% of U.S. towns
July afternoons average 82°. Summers stay cool: July afternoons here are cooler than in 82% of U.S. towns. Since 1901–2000, the year has warmed by 1.7°, most of all in December. Plan time outside from May to September, when highs sit at 69–82°.
A year in Castleton Four Corners at a glance
Each month’s typical high and low, and what it brings.
What stands out about Castleton Four Corners’ climate
Compared with towns across the U.S., with Castleton Four Corners’ place in Vermont beside it.
What a year in Castleton Four Corners feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 132 frost-free days a year
In half of years the last 32° night comes by May 15 and the first by September 27. Frost and day counts come from NOAA’s station at Rutland, VT, 12 miles from the town’s center, 180 ft higher.
The 2023 USDA map puts Castleton Four Corners’ center in zone 5a: the coldest night of a typical winter, averaged over 1991–2020, reaches about −17°. 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 Rutland, VT, 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 143 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Castleton Four Corners
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 Rutland, VT.
Living with Castleton Four Corners’ climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
132 frost-free days in zone 5a. The last frost comes by May 15 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.
Parks & trails →Of the yearly building losses FEMA expects in Castleton Four Corners from natural hazards, river flooding is the largest share (69%); heat waves, cold waves, winter storms and ice storms together are 14%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Castleton Four Corners and similar climates
TownRatings has no climate map of the towns around Castleton Four Corners yet.
Climates most like Castleton Four Corners’, 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 |
|---|---|---|---|---|
| Castleton Four Corners, VT | 11° | 82° | 40" | 75" |
| Greenville, MI | 15° | 82° | 37" | 73" |
| Orono, ME | 9° | 80° | 43" | 75" |
| Wellsville, NY | 15° | 81° | 38" | 61" |
| Waunakee, WI | 11° | 82° | 37" | 52" |
Temperatures and precipitation come from NOAA’s 5 km grid; snow and day counts from the stations named on this page.
Warmer than it used to be
The last 30 years in Castleton Four Corners averaged 1.7° warmer than the 1900s. The biggest change is in December (+3.6°).
A bigger shift than in 69% 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 Castleton Four Corners compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Castleton Four Corners’ place among Vermont’s.
Castleton Four Corners weather by month
Highs, lows and precipitation from NOAA’s grid at Castleton Four Corners’ center; snow, wet days and snow on the ground from Rutland, VT. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 30° | 11° | 2.7" | 18.3" | 13 | 25 | 7° – 29° |
| February | 33° | 12° | 2.2" | 16.0" | 10 | 22 | 8° – 30° |
| March | 42° | 21° | 2.9" | 13.8" | 12 | 17 | 21° – 43° |
| April | 57° | 33° | 3.2" | 3.2" | 12 | 2 | 39° – 50° |
| May | 69° | 44° | 3.5" | 0.0" | 13 | 0 | 51° – 62° |
| June | 77° | 53° | 4.2" | 0.0" | 13 | 0 | 63° – 70° |
| July | 82° | 59° | 4.0" | 0.0" | 12 | 0 | 66° – 74° |
| August | 80° | 56° | 3.9" | 0.0" | 11 | 0 | 65° – 71° |
| September | 72° | 49° | 3.3" | 0.0" | 10 | 0 | 56° – 65° |
| October | 59° | 38° | 4.0" | 0.3" | 13 | 0 | 44° – 54° |
| November | 47° | 29° | 2.8" | 4.7" | 12 | 4 | 32° – 43° |
| December | 36° | 19° | 3.1" | 18.3" | 14 | 18 | 19° – 39° |
| Year | 57° | 35° | 39.7" | 74.6" | 143 | 88 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 8° to 30°. August is the most reliable, staying within 6°.
Where Castleton Four Corners’ 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 Castleton Four Corners’ center.
- Snow: Rutland, VT.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Rutland, VT, 12 miles from the town’s center, 180 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 Castleton Four Corners’ climate
What is the weather like in Castleton Four Corners?
A typical July afternoon reaches 82°, a January night drops to 11°, and about 75 inches of snow falls in a normal winter. Colder January nights than 93% of U.S. towns; cooler July afternoons than 82% of U.S. towns.
How cold does it get in Castleton Four Corners in winter?
January nights average 11°. About 164 nights a year reach 32° or below and 19 reach 0° or below. In the coldest January of the last 30 years the month averaged 7°.
How much snow does Castleton Four Corners get?
About 75 inches in a normal winter at Rutland, VT, most of it in January and December, with snow on the ground about 88 days a year.
How hot does it get in Castleton Four Corners?
July, with a typical high of 82° and a low of 59°. About 4 days a year reach 90° (Rutland, VT).
When is the first and last frost in Castleton Four Corners?
In half of years the last spring frost (32°) comes by May 15 and the first fall frost by September 27, about 132 frost-free days, at Rutland, VT.
What growing zone is Castleton Four Corners in?
Zone 5a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −17°.
What is the best time of year to visit Castleton Four Corners?
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 Castleton Four Corners getting warmer?
Yes: 1991–2020 averaged 1.7° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 69% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Castleton Four Corners.
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.