Frost dates for Tiverton, Rhode Island
Half of years have their last spring frost by April 11, but 1 year in 10 still frosts after April 22.
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
- April 22
- 1 year in 5
- April 19
- 3 years in 10
- April 16
- 2 years in 5
- April 13
- Half of years (the median)
- April 11
First fall freeze
How often the first freeze comes on or before each date.
- 1 year in 10
- October 20
- 1 year in 5
- October 26
- 3 years in 10
- October 29
- 2 years in 5
- November 1
- Half of years (the median)
- November 2
- Growing season
- about 203 days
- Hardiness zone nearby
- 7a
- Summer days
- a usual high of about 28 °C83 °F
- Lettuce and spinach run to seed
- June to September, 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 ~4 °C38 °F · low ~-5 °C24 °F · rain ~102 mm4 in
- February
- high ~5 °C41 °F · low ~-4 °C24 °F · rain ~98 mm3.8 in
- March
- high ~9 °C49 °F · low ~-1 °C30 °F · rain ~141 mm5.6 in
- April
- high ~16 °C60 °F · low ~4 °C39 °F · rain ~114 mm4.5 in
- May
- high ~21 °C70 °F · low ~9 °C49 °F · rain ~91 mm3.6 in
- June
- high ~26 °C79 °F · low ~15 °C58 °F · rain ~93 mm3.7 in
- July
- high ~29 °C85 °F · low ~18 °C65 °F · rain ~75 mm3 in
- August
- high ~29 °C84 °F · low ~18 °C64 °F · rain ~97 mm3.8 in
- September
- high ~25 °C77 °F · low ~14 °C57 °F · rain ~100 mm3.9 in
- October
- high ~18 °C64 °F · low ~8 °C47 °F · rain ~115 mm4.5 in
- November
- high ~12 °C53 °F · low ~3 °C37 °F · rain ~104 mm4.1 in
- December
- high ~6 °C43 °F · low ~-1 °C29 °F · rain ~125 mm4.9 in
Where these numbers come from
NOAA NCEI 1991–2020 Climate Normals, the Tiverton station (listed by NOAA as Tiverton, USC00377581), at 41.63, -71.21. 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
02720, 02721, 02723, 02724, 02725, 02726, 02777, 02790, 02791, 02809, 02837, 02871…
+3 moreShow fewer
02872, 02878, 02885.
Nearby stations
The nearest stations and how their last-frost dates compare. Together they show how frost varies across your area.
- Providence T F Green Airport, RI, last frost by April 11
- E Wareham, MA, last frost by April 21
- N Foster 1 E, RI, last frost by April 25
- Westerly State Airport, RI, last frost by April 11
- West Medway, MA, last frost by April 30
- Hingham, MA, last frost by April 25
When do I plant? · Where the dates come from
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