Westerly State, RI Climate: Temperature & Rain by Month
Pulled from NOAA NCEI 1991–2020 normals →: climate measurements used in PlainClimate's documented score
30-year climate normals (1991-2020) from Westerly State's primary NOAA station, WESTERLY STATE AP.
The climate verdict for Westerly State
Westerly State, Rhode Island has a mixed annual climate rather than one dominant extreme. Its NOAA normal shows an annual average of 53°F. Its climate comfort score of 68/100 (good) lands mid-pack nationally, exceeding 56% of station-mapped location scores.
- 53°F
- average temperature, NOAA 1991-2020 normal
- 68/100
- comfort score, above 56% of station-mapped location scores
- 42.8"
- precipitation, annual total
- 203 days
- frost-free days per growing season
Westerly State: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USW00014794 · Westerly State, RI 53°F mean · 42.8" precip
TEMP-COOL · RANK-MID · PHOTO-FINISH · PRCP-MID · SWING-MID · COMF-MID · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 53°F
- RANK-MID #3,499
- PHOTO-FINISH ≈ Deer Flat Dam
- PRCP-MID 42.8"
- SWING-MID 42°F
- COMF-MID 68/100
- LOAD-HEAT 5,249 HDD
- STN-1 USW00014794
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Deer Flat Dam, ID (+ 0 °F mean)
Instrument codes from this station's NOAA 1991–2020 normals, mean temperature, corpus warmth rank, photo-finish peer station, precipitation band, seasonal swing, comfort composite, degree-day load, and field book, not a livability rating.
Mean-temperature neighbourhood
Nationwide NOAA normal poles and nearest peers, not a reprint of every RI station list.
- Westerly State (this station) 53°F
- Hot Deer Flat Dam, ID 53°F
- Cold Espanola, NM 52°F
- Near Olive Hill, KY 52°F
- Near Groton, CT 52°F
Climate Living Index · Westerly State
Westerly State: 66/100 · grade C
Westerly State publishes 4 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 2 missing weights rescale to 100.
PlainClimate-derived for Westerly State, not an official NOAA rating. Rankings still use Comfort Score 68/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Normal heat + freeze calendar | 99 calendar days | 76/100 · B |
| Precipitation balance | 42.8 in · 7.8 from 35 in | 73/100 · B |
| Frost-free season | 203 days/year | 66/100 · C |
| Annual temperature balance | 52.5°F · 15.0° from 67.5°F | 51/100 · D |
Westerly State · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Westerly State is a temperate Köppen climate: Cfa
Coldest-month mean 32.0°F and warmest-month mean 73.8°F place this station in temperate, no dry season, hot summer climates (Cfa). Class Cfa is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: temperate, specifically temperate, no dry season, hot summer.
- Köppen code
- Cfa
- Group
- Temperate
- Warmest month
- 73.8°F
- Coldest month
- 32.0°F
Source: official public datasets monthly normals (1991–2020) at the city’s primary station. This is a station classification, not a mapped regional consensus.
National standing · heating-led station
Where Westerly State sits across the climate record
Three NOAA fields for Westerly State's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 51st percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- 64th percentile wetness
- Neither arid nor torrential versus 6,352 station totals.
- Seasonal temperature swing
- 43rd percentile swing
- Typical seasonal amplitude versus 6,861 complete station-years.
How Westerly State compares across U.S. station-mapped locations
Westerly State's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
68 Top 44% score exceeds 56% of 6,189 station-mapped location scores
- 0–10: 0 station-mapped locations (0%). Below this entry.
- 10–20: 0 station-mapped locations (0%). Below this entry.
- 20–30: 96 station-mapped locations (2%). Below this entry.
- 30–40: 280 station-mapped locations (5%). Below this entry.
- 40–50: 1,113 station-mapped locations (18%). Below this entry.
- 50–60: 1,329 station-mapped locations (21%). Below this entry.
- 60–70: 1,236 station-mapped locations (20%). This entry sits in this band.
- 70–80: 650 station-mapped locations (11%). Above this entry.
- 80–90: 921 station-mapped locations (15%). Above this entry.
- 90–100: 564 station-mapped locations (9%). Above this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 40°F (4°C) | 25°F (-4°C) | 32°F (0°C) | 3.3" | 25.2 | 0.0 |
| February | 41°F (5°C) | 26°F (-4°C) | 33°F (1°C) | 2.8" | 23.3 | 0.0 |
| March | 47°F (8°C) | 32°F (0°C) | 40°F (4°C) | 4.2" | 19.0 | 0.0 |
| April | 57°F (14°C) | 41°F (5°C) | 49°F (9°C) | 3.9" | 5.9 | 0.0 |
| May | 67°F (19°C) | 50°F (10°C) | 58°F (15°C) | 3.3" | 0.4 | 0.0 |
| June | 75°F (24°C) | 59°F (15°C) | 67°F (20°C) | 3.5" | 0.0 | 0.1 |
| July | 82°F (28°C) | 66°F (19°C) | 74°F (23°C) | 2.9" | 0.0 | 1.7 |
| August | 81°F (27°C) | 64°F (18°C) | 72°F (22°C) | 3.5" | 0.0 | 0.8 |
| September | 74°F (24°C) | 57°F (14°C) | 66°F (19°C) | 3.8" | 0.0 | 0.1 |
| October | 64°F (18°C) | 47°F (8°C) | 55°F (13°C) | 4.3" | 2.5 | 0.0 |
| November | 54°F (12°C) | 38°F (3°C) | 46°F (8°C) | 3.5" | 11.4 | 0.0 |
| December | 45°F (7°C) | 30°F (-1°C) | 38°F (3°C) | 3.8" | 21.5 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 82°F around July 19, short of 90°F on every date, while 99 dates carry a normal low at or below freezing, the coldest 24°F near January 22.
The freezing stretch
The normal low stays at or below 32°F into March 16, then returns to freezing around December 9, covering 99 dates in all.
Derived from the normal daily minimum. This is a different measure from the 50%-probability frost dates shown elsewhere on this page, which come from NOAA’s frost product.
Where the wet dates fall
The likeliest wet date is May 12, when 38% of years recorded at least a hundredth of an inch. The driest is August 25 at 30%. Summed across the calendar, that is about 124 wet dates a year.
The widest day
October 10 carries the biggest normal gap between afternoon and dawn, 18°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Westerly State.
Where Westerly State Stands Nationally
Among the steadiest day-night climates ranked: even the widest normal daily swing holds to roughly 18°F.
Westerly State earns one nationally notable standing (outer quintile) against 6,860 NOAA 1991–2020 normals stations, middle-of-the-pack metrics stay silent here.
Monthly Precipitation
Average monthly rainfall
10.6 days with precipitation
9.1 days with precipitation
9.6 days with precipitation
11.3 days with precipitation
11.8 days with precipitation
11.0 days with precipitation
9.3 days with precipitation
9.4 days with precipitation
9.5 days with precipitation
10.9 days with precipitation
9.5 days with precipitation
11.2 days with precipitation
Westerly State spreads its precipitation across the year
Neither half of the year dominates here: June through August take 23% of the annual total and December through February 23%, with neither reaching the 35% that would mark a distinct wet season. Westerly State has no dry season to plan around, though it does carry a 41.8°F seasonal spread.
The gap between the wettest and driest month still matters: October averages 4.3" and February 2.8". The three wettest months together take 29% of the year, against the 25% a perfectly flat distribution would give them.
Shares are computed from this station's own 1991-2020 monthly precipitation normals. "Spread across the year" means neither the June-August nor the December-February share reaches 35%; it describes an average year, not the variability of any single one.
How Westerly State's precipitation splits across the calendar
About 123 days a year record measurable precipitation here, carrying 42.8" between them, or roughly 0.35 inches on a typical wet day. That sits in the middle band: neither the many-light-days pattern of the Pacific Northwest and the Great Lakes, nor the few-heavy-events pattern of the Gulf and the desert Southwest.
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year and say nothing about the heaviest single storm on record.
Frost Dates & Growing Season
First Fall Freeze
October 31
50% probability date
Last Spring Freeze
April 11
50% probability date
Growing Season
203 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
5,249
Higher = more heating needed
Cooling Degree Days
727
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside RI closest to Westerly State on two NOAA annual-normal axes (mean temperature and annual precipitation). Chip rows use distinct link sets.
Closest by average temperature
Nearest out-of-state peers by annual mean temperature (53°F here).
- Cameron, MO 53°F · 0.0°F off
- Cheraw, CO 53°F · 0.0°F off
- Chillicothe, MO 53°F · 0.0°F off
- Cloverdale, OR 53°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (42.8" here), excluding temperature-peer places.
- Healdsburg, CA 42.8" · 0.0" off
- Gainesville, TX 42.8" · 0.0" off
- Lexington, VA 42.9" · 0.1" off
- Moberly, MO 42.7" · 0.1" off
Data-derived climate profile
How Westerly State's climate pattern fits together
heating led · moderate · mid swing
Westerly State's energy balance leans toward cold weather: 5,249 annual heating degree days against 727 for cooling. Its 41.8°F seasonal range still makes the monthly rows more useful than the annual average alone.
Westerly State's frost-free season lasts about 203 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
July and January mark the typical warm and cold ends of the calendar in Westerly State's middle-range seasonal profile. The measured spread is 41.8°F. The annual average is 53°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
Westerly State's 42.8 inches of annual precipitation falls in PlainClimate's middle band, so “wet” or “dry” is not the leading description. Snowfall is not added to the interpretation because its annual value is missing. Temperature balance and the calendar distribution carry more information than the annual moisture label alone.
These labels group NOAA 1991-2020 normals from Westerly State's primary station, so the winter figures are a thirty-year average and not a floor: a single hard season can run well below them. Treat each band as a descriptive range for Westerly State, not an official NOAA class or a year-ahead forecast.
Questions about Westerly State's climate
How much rain does Westerly State get? ▼
How cold does Westerly State get in winter? ▼
How much energy does heating and cooling require in Westerly State? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Westerly State's primary station: WESTERLY STATE AP (USW00014794). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The conservative exact name-and-state crosswalk finds no Census place match, so PlainClimate treats this as a station-mapped location and does not claim it is a municipality. No exact Gazetteer row for Westerly State; facility counts that depend on place identity are therefore an upper bound, not a municipal census.
On this page every temperature, precipitation, and derived score for Westerly State comes from its primary NOAA station record. No figure on this page is typed in by an editor - each value is rendered from NOAA 1991-2020 U.S. Climate Normals. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 1991–2020 normals.