Tiverton, Rhode Island climate: Normal weather by month, frost dates and records
Tiverton's normal year runs from 24°F January nights to 85°F July afternoons, with 49.4 inches of precipitation and 38 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 11.6°C, January lows of −5°C, July highs of 29°C, 1,255 mm of precipitation a year.
- NOAA stationTiverton
- Station IDUSC00377581
- Location41.63°N 71.21°W
- Elevation90 ft (27 m)
- Population (town)15,938
- Census place8,151
On October 23, the normal high in Tiverton is 61°F and the normal low 44°F, and the chance of measurable rain or snow is 36%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Tiverton.
- Jan 39° 24°
- Feb 41° 25°
- Mar 49° 30°
- Apr 60° 39°
- May 70° 49°
- Jun 79° 58°
- Jul 85° 65°
- Aug 84° 64°
- Sep 77° 57°
- Oct 64° 47°
- Nov 53° 37°
- Dec 43° 30°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Tiverton each month?
July is the warmest month, with normal highs of 85°F; January the coldest, with normal lows of 24°F. The most precipitation falls in March (5.55 in), the least in July (2.96 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 39°F | 24°F | 31.0°F | 4.01 | 10.9 | 12 | <1 | 26 | 9 h 30 min |
| February | 41°F | 25°F | 32.9°F | 3.84 | 11.3 | 11 | <1 | 24 | 10 h 30 min |
| March | 49°F | 30°F | 39.7°F | 5.55 | 7.4 | 12 | <1 | 20 | 11 h 50 min |
| April | 60°F | 39°F | 49.6°F | 4.50 | 0.6 | 13 | <1 | 4 | 13 h 20 min |
| May | 70°F | 49°F | 59.6°F | 3.57 | 0.0 | 13 | <1 | <1 | 14 h 30 min |
| June | 79°F | 58°F | 68.8°F | 3.66 | 0.0 | 12 | 2 | <1 | 15 h 10 min |
| July | 85°F | 65°F | 74.9°F | 2.96 | 0.0 | 10 | 7 | <1 | 15 h |
| August | 84°F | 64°F | 74.0°F | 3.81 | 0.0 | 9 | 4 | <1 | 13 h 50 min |
| September | 77°F | 57°F | 67.1°F | 3.93 | 0.0 | 9 | 1 | <1 | 12 h 30 min |
| October | 64°F | 47°F | 55.4°F | 4.54 | 0.0 | 12 | <1 | 1 | 11 h 10 min |
| November | 53°F | 37°F | 44.8°F | 4.11 | 0.6 | 10 | <1 | 9 | 9 h 50 min |
| December | 43°F | 30°F | 36.4°F | 4.91 | 7.3 | 13 | <1 | 21 | 9 h 10 min |
| Year (annual) | 62°F | 44°F | 52.9°F | 49.39 | 38.1 | 136 | 13 | 105 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 4°C | −5°C | −0.6°C | 102 mm | 28 cm |
| February | 5°C | −4°C | 0.5°C | 98 mm | 29 cm |
| March | 9°C | −1°C | 4.3°C | 141 mm | 19 cm |
| April | 16°C | 4°C | 9.8°C | 114 mm | 2 cm |
| May | 21°C | 9°C | 15.3°C | 91 mm | 0 cm |
| June | 26°C | 15°C | 20.4°C | 93 mm | 0 cm |
| July | 29°C | 18°C | 23.8°C | 75 mm | 0 cm |
| August | 29°C | 18°C | 23.3°C | 97 mm | 0 cm |
| September | 25°C | 14°C | 19.5°C | 100 mm | 0 cm |
| October | 18°C | 8°C | 13.0°C | 115 mm | 0 cm |
| November | 12°C | 3°C | 7.1°C | 104 mm | 2 cm |
| December | 6°C | −1°C | 2.4°C | 125 mm | 19 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00377581; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
When is the best weather to visit Tiverton?
Normal highs sit between 65°F and 85°F in May, June, July, August and September. Of those, August has the fewest days with rain (9).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00377581.
When is the last frost in Tiverton?
In Tiverton, the last spring frost (32°F) comes after April 11 in half of years and after April 22 in one year in ten; the first autumn frost comes before November 2 in half of years and before October 20 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- April 111 year in 10 after April 22; 9 in 10 after April 1
- First autumn frost, half of years before
- November 21 year in 10 before October 20; 9 in 10 before November 15
NOAA puts the median frost-free season at 203 days, and the season without a hard freeze (28°F) at 227 days.
A hard freeze (28°F) comes after March 31 in half of springs and before November 13 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Tiverton in zone 7a in ZIP code 02878. By the map's own method, the average of each year's coldest night over 1991-2020, Tiverton's NOAA station is in zone 7a: the coldest night of a typical year reaches 4°F (19 complete years).
Frost dates for every NOAA station in Rhode Island · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00377581; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get in Tiverton?
In a normal year in Tiverton, 13 days a year reach 90°F, 105 nights fall to 32°F or colder and 136 days bring measurable precipitation.
- Days at 90°F or more
- 13a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 105a normal year
- Days that stay below freezing
- 24high of 32°F or less
- Days with 0.01 inch of precipitation
- 136a normal year
- Days with 1 inch of snow or more
- 10a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00377581.
How sunny is Tiverton?
Over a year 75% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Tiverton, 4.0 kWh per square metre a day. August is the sunniest month (81%) and December the cloudiest (67%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 69% | 1.9 |
| February | 71% | 2.7 |
| March | 71% | 3.8 |
| April | 72% | 5.0 |
| May | 72% | 5.6 |
| June | 76% | 6.1 |
| July | 81% | 6.2 |
| August | 81% | 5.5 |
| September | 79% | 4.5 |
| October | 72% | 3.0 |
| November | 71% | 2.1 |
| December | 67% | 1.6 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How much heating and cooling does Tiverton need?
A normal year in Tiverton brings 5,268 heating degree days, 2% fewer than the median U.S. place (5,373), and 880 cooling degree days, 3% fewer than the median (908). Seven months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 3,226 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,052 | 0 |
| February | 899 | 0 |
| March | 786 | 0 |
| April | 462 | 2 |
| May | 192 | 23 |
| June | 29 | 145 |
| July | 1 | 309 |
| August | 1 | 280 |
| September | 48 | 111 |
| October | 306 | 10 |
| November | 605 | 0 |
| December | 887 | 0 |
| Year (annual) | 5,268 | 880 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00377581. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
How does Tiverton's climate compare?
Tiverton is warmer than 5 of the other 5 places with their own NOAA record in Rhode Island, and wetter than 3. Across the 7,247 U.S. stations with normals, its annual mean of 52.9°F is warmer than 53%.
In the Köppen classification computed from these normals, Tiverton is Dfa: continental, no dry season, hot summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Which places near Tiverton share this climate record?
6 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Fall River, MAalso near: New Bedford (8 mi, 50.4°F a year); Rochester (10 mi, 50.5°F a year)94,689 people · 9 mi NE
- Somerset, MA18,375 people · 8 mi N
- Bliss Corner, MA5,666 people · 14 mi E
- North Westport, MA4,995 people · 6 mi NE
- Smith Mills, MA4,467 people · 11 mi E
- Ocean Grove, MA3,099 people · 7 mi N
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Tiverton's climate
What is the coldest month in Tiverton?
January, with a normal high of 39°F and a normal low of 24°F. The warmest is July (85°F by day, 65°F at night).
Does it snow in Tiverton?
Yes: 38 inches in a normal year, falling on 18 days with 0.1 inch or more, the most in February (11.3 inches).
What is the rainiest month in Tiverton?
March, with 5.55 in of precipitation in a normal year; the driest is July with 2.96 in.
What plant hardiness zone is Tiverton in?
The USDA's 2023 map puts Tiverton in zone 7a in ZIP code 02878. By the same method at Tiverton's NOAA station, the coldest night of a typical year reaches 4°F (19 years, 1991-2020): zone 7a.
How late can frost come in Tiverton?
In half of years the last 32°F night comes after April 11; in one year in ten it comes after April 22. Waiting until April 22 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Rhode Island climateThe statewide normals and every place in the state
- Newport, RI7 miles from this station, 51.3°F a year
- Providence, RI13 miles from this station, 52.1°F a year
- New Bedford, MA14 miles from this station, 50.4°F a year
- Coventry 2, RI18 miles from this station, 50.5°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made