Frost dates for Lawrence Hcn, Massachusetts
Half of years have their last spring frost by April 13 — but 1 year in 10 still frosts after April 29.
Every other site gives you one date. A frost date is not a date: it is a percentile from 30 years of records at a nearby weather station, and planting to the median means losing the crop in half of years. Both numbers are below, so you can choose the risk yourself.
The odds
Last spring frost
- Frost this late in 1 year in 10
- April 29
- 1 year in 5
- April 23
- 3 years in 10
- April 19
- 2 years in 5
- April 17
- Half of years (the median)
- April 13
First fall freeze
- Freeze this early in 1 year in 10
- October 13
- 1 year in 5
- October 18
- 3 years in 10
- October 22
- 2 years in 5
- October 26
- Half of years (the median)
- October 28
- Growing season
- about 198 days
- Hardiness zones nearby
- 6a, 6b
Where these numbers come from
NOAA NCEI 1991–2020 Climate Normals, station Lawrence Hcn (USC00194105), at 42.70, -71.17. These are that station's own records, unshifted. The further your garden is from it, the less exactly they describe your ground — the planner resolves the nearest station to your own ZIP and lowers its confidence with distance, rather than presenting one number as if it were measured in your yard.
Cold air also pools in low ground on the clear, still nights when frost happens, so a hollow can freeze while a slope a hundred metres away does not. No table can know that about your garden. Your own logged frosts eventually can.
ZIP codes nearest this station
01730, 01741, 01801, 01803, 01810, 01821, 01824, 01826, 01830, 01832, 01833, 01834, 01835, 01840, 01841, 01843, 01844, 01845, 01850, 01851, 01852, 01854, 01860, 01862, 01863, 01864, 01867, 01876, 01879, 01886, 01887, 01921, 01985, 03051, 03053, 03060, 03064, 03076, 03079, 03087, 03811, 03865.
What can I plant here, and when? →
Nearby stations
The nearest stations, and how their last-frost dates compare — the frost gradient across your area, which no single station shows.
- Beverly, MA — last frost by May 4
- Epping, NH — last frost by May 7
- Natick, MA — last frost by April 26
- Greenville 1 Nne, NH — last frost by May 10
- Hingham, MA — last frost by April 25
- Hopkinton Lake, NH — last frost by May 6
Other stations in Massachusetts.
- Worcester Rgnl Ap, MA — last frost by April 23
- Tully Lake, MA — last frost by April 25
- Belchertown, MA — last frost by May 3
- E Wareham, MA — last frost by April 21
- Rowe 3Ne, MA — last frost by May 14
- Westfield Barnes Muni Ap, MA — last frost by May 3
- Lenox Dale, MA — last frost by May 7