Frost dates for S Hero, Vermont
Half of years have their last spring frost by April 28, but 1 year in 10 still frosts after May 10.
A frost date is really a percentile from 30 years of records at a nearby weather station: in about half of years a frost still comes after the median date. Both numbers are below, so you can choose the risk yourself.
The odds
Last spring frost
How often a frost still comes on or after each date.
- 1 year in 10
- May 10
- 1 year in 5
- May 5
- 3 years in 10
- May 3
- 2 years in 5
- April 30
- Half of years (the median)
- April 28
First fall freeze
How often the first freeze comes on or before each date.
- 1 year in 10
- October 4
- 1 year in 5
- October 9
- 3 years in 10
- October 13
- 2 years in 5
- October 16
- Half of years (the median)
- October 20
- Growing season
- about 174 days
- Hardiness zones nearby
- 5a, 5b
- Summer days
- a usual high of about 26 °C79 °F
- Lettuce and spinach run to seed
- June to August, in hot, long days (how we know)
Summer and rain
A growing garden needs about 25 mm1 in of water a week, rain and watering together. Here is what a normal month brings.
Month by month
- January
- high ~-2 °C28 °F · low ~-12 °C11 °F · rain ~49 mm1.9 in
- February
- high ~-1 °C31 °F · low ~-11 °C12 °F · rain ~40 mm1.6 in
- March
- high ~4 °C40 °F · low ~-6 °C22 °F · rain ~51 mm2 in
- April
- high ~12 °C54 °F · low ~1 °C34 °F · rain ~68 mm2.7 in
- May
- high ~20 °C68 °F · low ~8 °C46 °F · rain ~85 mm3.4 in
- June
- high ~25 °C77 °F · low ~13 °C56 °F · rain ~104 mm4.1 in
- July
- high ~28 °C82 °F · low ~17 °C62 °F · rain ~98 mm3.9 in
- August
- high ~27 °C80 °F · low ~16 °C61 °F · rain ~92 mm3.6 in
- September
- high ~22 °C72 °F · low ~12 °C53 °F · rain ~83 mm3.3 in
- October
- high ~14 °C58 °F · low ~6 °C42 °F · rain ~95 mm3.7 in
- November
- high ~8 °C46 °F · low ~0 °C31 °F · rain ~68 mm2.7 in
- December
- high ~1 °C34 °F · low ~-6 °C20 °F · rain ~56 mm2.2 in
Where these numbers come from
NOAA NCEI 1991–2020 Climate Normals, the S Hero station (listed by NOAA as S Hero HCN, USC00437607), at 44.63, -73.30. These are that station’s own records, unshifted. The further your garden is from it, the less exactly they describe your ground. The planner finds the nearest station to your garden and lowers its confidence with distance, so no number is presented as if it were measured in your garden.
Cold air also pools in low ground on the clear, still nights when frost happens, so a hollow can freeze while a slope a few hundred feet away does not. No table can know that about your garden. A few seasons of your own logged frosts can.
ZIP codes nearest this station
05440, 05458, 05468, 05474, 05478, 05481, 05486, 05488.
Nearby stations
The nearest stations and how their last-frost dates compare. Together they show how frost varies across your area.
- Johnson 2 N, VT, last frost by May 9
- Plainfield, VT, last frost by May 25
- Glens Falls Farm, NY, last frost by May 17
- Peru, VT, last frost by May 16
When do I plant? · Where the dates come from
More ways Milpa can help
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