Frost dates · Rhode Island
Rhode Island frost dates, county by county.
Last spring frost and first fall frost probability data for all 5 counties in Rhode Island, computed from the NOAA 1991–2020 Climate Normals. Every county page surfaces the full probability table at three temperature thresholds plus crop-specific planting guidance.
Variation across Rhode Island
18 days separate the earliest and latest counties.
The median last spring frost in Newport County is March 31 — 18 days earlier than Washington County at April 18. Statewide averages aren't useful planting tools; pick your county below for the data that actually applies to your fields.
By geography
Rhode Island counties on the map.
Each polygon is a county. Click for full frost-date detail. Color shows last-spring-frost timing — sage = earliest, amber = latest.
MapList
Last spring frostEarliestMedianLatest
5 counties · click any county for full frost data