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 frost timing
Counties sorted by last spring frost.
Latest at top, earliest at bottom. In most states this matches the north-to-south gradient.
Alphabetical