Frost Dates for Hopkinton, RI

Based on data from Westerly State AP weather station, 8 miles away

Frost Dates

Last Spring Frost (50%) iA 50% chance that the last spring frost has already passed by this date. Most gardeners use this as their primary planting guide. April 11
First Fall Frost (50%) iA 50% chance that the first fall frost has occurred by this date. Plan to harvest or protect tender plants before this date. October 31
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

30% Probability iOnly a 30% chance of frost remaining by this date. Use these dates for a safer planting window, especially for tender plants sensitive to cold.

Last Spring Frost April 17
First Fall Frost October 25

Hard Freeze (28°F)

Last Spring Hard Freeze March 29
First Fall Hard Freeze November 11
41.46°N, -71.78°W © OpenStreetMap

Growing Season

203 Days April 11 to October 31

USDA Hardiness Zone iHardiness zones indicate which perennial plants can survive winter in your area. For annual vegetables, frost dates and growing season length matter more than hardiness zone.

Zone 7a

Avg. annual minimum: 0 to 5°F (−18 to −15°C)

Learn more

Köppen Climate iThe Köppen climate classification system categorizes climates based on temperature and precipitation patterns.

Cfa Humid Subtropical

Hot, humid summers and mild winters with rain year-round. Long growing seasons support a wide variety of vegetables, fruits, and ornamentals. The most common climate in the eastern US.

Köppen climate map

Temperature

20° 40° 60° 80°
32°
High: 40°F
Avg: 32°F
Low: 25°F
Jan
33°
High: 41°F
Avg: 33°F
Low: 26°F
Feb
40°
High: 47°F
Avg: 40°F
Low: 32°F
Mar
49°
High: 57°F
Avg: 49°F
Low: 41°F
Apr
58°
High: 67°F
Avg: 58°F
Low: 50°F
May
67°
High: 75°F
Avg: 67°F
Low: 59°F
Jun
74°
High: 82°F
Avg: 74°F
Low: 66°F
Jul
72°
High: 81°F
Avg: 72°F
Low: 64°F
Aug
66°
High: 74°F
Avg: 66°F
Low: 57°F
Sep
55°
High: 64°F
Avg: 55°F
Low: 47°F
Oct
46°
High: 54°F
Avg: 46°F
Low: 38°F
Nov
38°
High: 45°F
Avg: 38°F
Low: 30°F
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 2" 4" 5.4"
4.2"
4.18"
Jan
4.3"
4.33"
Feb
5.2"
5.17"
Mar
4.6"
4.63"
Apr
4.8"
4.85"
May
4.9"
4.93"
Jun
4.5"
4.48"
Jul
4.2"
4.21"
Aug
3.9"
3.90"
Sep
4.4"
4.37"
Oct
4.7"
4.70"
Nov
5.4"
5.37"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9.5h10.5h11.5h13h14.5h15h14.5h13.5h12.5h11h9.5h9h
Jan: 7:20 AM – 4:40 PM · 9h 20m
Feb: 6:48 AM – 5:12 PM · 10h 24m
Mar: 6:10 AM – 5:50 PM · 11h 40m
Apr: 5:26 AM – 6:34 PM · 13h 07m
May: 4:50 AM – 7:10 PM · 14h 19m
Jun: 4:31 AM – 7:29 PM · 14h 58m
Jul: 4:39 AM – 7:21 PM · 14h 42m
Aug: 5:10 AM – 6:50 PM · 13h 40m
Sep: 5:52 AM – 6:08 PM · 12h 16m
Oct: 6:34 AM – 5:26 PM · 10h 52m
Nov: 7:11 AM – 4:49 PM · 9h 38m
Dec: 7:29 AM – 4:31 PM · 9h 02m
Daylight Longest: 14h 60m · Shortest: 9h 01m

Nearby Stations

Groton, CTApril 8 - November 2 Groton New London AP, CT April 16 - October 28 Kingston 1 W, RI May 1 - October 12 Kingston, RIMay 3 - October 8 Kingston 1 Nw, RI April 27 - October 15 Norwich Public Utility Plt, CT April 14 - October 24

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