Jamaica Plain, MA Climate: Temperature & Rain by Month
Annual temperature and rainfall from NOAA NCEI's 1991–2020 normals →; comfort score computed by PlainClimate
30-year climate normals (1991-2020) from Jamaica Plain's primary NOAA station, JAMAICA PLAIN.
The climate verdict for Jamaica Plain
Water is the standout signal in Jamaica Plain, Massachusetts: 49.4 inches of precipitation in a normal year. Against that wet profile, NOAA records an annual average of 51°F. Its climate comfort score of 68/100 (good) lands mid-pack nationally, exceeding 56% of station-mapped location scores.
- 51°F
- annual average temperature (NOAA normal)
- 68/100
- comfort score, above 56% of station-mapped location scores
- 49.4"
- yearly precipitation total
- 187 days
- growing season, frost-free days
Jamaica Plain: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00193890 · Jamaica Plain, MA 51°F mean · 49.4" precip
TEMP-COOL · RANK-MID · PHOTO-FINISH · PRCP-MID · SWING-WIDE · COMF-MID · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 51°F
- RANK-MID #3,156
- PHOTO-FINISH ≈ Flagler
- PRCP-MID 49.4"
- SWING-WIDE 46°F
- COMF-MID 68/100
- LOAD-HEAT 5,811 HDD
- STN-1 USC00193890
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Flagler, CO (+ 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 MA station list.
- Jamaica Plain (this station) 51°F
- Hot Delta, CO 51°F
- Near Flagler, CO 51°F
- Near Eaton, OH 51°F
- Near Wenatchee Pangb…, WA 51°F
Climate Living Index · Jamaica Plain
Jamaica Plain: 53/100 · grade D
Jamaica Plain publishes 4 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 2 missing weights rescale to 100.
PlainClimate-derived for Jamaica Plain, 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 | 126 calendar days | 61/100 · C |
| Frost-free season | 187 days/year | 55/100 · C |
| Precipitation balance | 49.4 in · 14.4 from 35 in | 50/100 · D |
| Annual temperature balance | 51.2°F · 16.3° from 67.5°F | 46/100 · D |
Jamaica Plain · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Jamaica Plain is a continental Köppen climate: Dfa
Coldest-month mean 28.2°F and warmest-month mean 74.4°F place this station in continental, no dry season, hot summer climates (Dfa). Class Dfa is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: continental, specifically continental, no dry season, hot summer.
- Köppen code
- Dfa
- Group
- Continental
- Warmest month
- 74.4°F
- Coldest month
- 28.2°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 Jamaica Plain sits across the climate record
Three NOAA fields for Jamaica Plain's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 46th percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- Top 21% wettest
- Jamaica Plain's annual total ranks in the wetter third of 6,352 measured normals.
- Seasonal temperature swing
- 65th percentile swing
- Typical seasonal amplitude versus 6,861 complete station-years.
How Jamaica Plain compares across U.S. station-mapped locations
Jamaica Plain'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
Jamaica Plain's measured station temperature trend
MethodologyAcross 50 complete annual observations from 1963 to 2025, JAMAICA PLAIN warmed at a fitted rate of 0.34°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Jamaica Plain primary station fitted change +0.34 °C/decade
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 37°F (3°C) | 19°F (-7°C) | 28°F (-2°C) | 3.9" | 27.7 | 0.0 |
| February | 40°F (4°C) | 21°F (-6°C) | 30°F (-1°C) | 3.6" | 24.3 | 0.0 |
| March | 47°F (8°C) | 28°F (-2°C) | 38°F (3°C) | 4.5" | 20.3 | 0.0 |
| April | 59°F (15°C) | 38°F (3°C) | 49°F (9°C) | 4.3" | 6.8 | 0.2 |
| May | 69°F (21°C) | 48°F (9°C) | 59°F (15°C) | 3.6" | 0.2 | 1.2 |
| June | 79°F (26°C) | 58°F (14°C) | 68°F (20°C) | 4.2" | 0.0 | 3.1 |
| July | 85°F (29°C) | 64°F (18°C) | 74°F (24°C) | 3.5" | 0.0 | 8.5 |
| August | 83°F (28°C) | 63°F (17°C) | 73°F (23°C) | 3.7" | 0.0 | 5.9 |
| September | 76°F (24°C) | 55°F (13°C) | 65°F (18°C) | 4.0" | 0.0 | 1.3 |
| October | 64°F (18°C) | 43°F (6°C) | 53°F (12°C) | 5.0" | 3.1 | 0.0 |
| November | 53°F (11°C) | 34°F (1°C) | 43°F (6°C) | 4.0" | 14.1 | 0.0 |
| December | 42°F (6°C) | 26°F (-4°C) | 34°F (1°C) | 5.1" | 24.3 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 85°F around July 16, short of 90°F on every date, while 126 dates carry a normal low at or below freezing, the coldest 19°F near January 23.
The freezing stretch
The normal low stays at or below 32°F into March 28, then returns to freezing around November 24, covering 126 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.
The widest day
May 5 carries the biggest normal gap between afternoon and dawn, 22°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Jamaica Plain.
Where Jamaica Plain Stands Nationally
Days and nights track unusually close together; the widest normal swing, about 22°F, is narrower than most stations record.
Jamaica Plain 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
Jamaica Plain 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 25%, with neither reaching the 35% that would mark a distinct wet season. Jamaica Plain has no dry season to plan around, though it does carry a wide 46.2°F gap between its warmest and coldest month.
The gap between the wettest and driest month still matters: December averages 5.1" and July 3.5". The three wettest months together take 30% 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.
Frost Dates & Growing Season
First Fall Freeze
October 23
50% probability date
Last Spring Freeze
April 19
50% probability date
Growing Season
187 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
5,811
Higher = more heating needed
Cooling Degree Days
827
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside MA closest to Jamaica Plain 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 (51°F here).
- Bellingham, WA 51°F · 0.0°F off
- Bloomfield, IA 51°F · 0.0°F off
- Burlington, IA 51°F · 0.0°F off
- Chicago, IL 51°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (49.4" here), excluding temperature-peer places.
- Smithfield, NC 49.4" · 0.0" off
- Tiverton, RI 49.4" · 0.0" off
- Atlanta, GA 49.3" · 0.1" off
- Clarksville, TX 49.4" · 0.1" off
Data-derived climate profile
How Jamaica Plain's climate pattern fits together
heating led · wet · mid swing
Jamaica Plain's energy balance leans toward cold weather: 5,811 annual heating degree days against 827 for cooling. Its 46.2°F seasonal range still makes the monthly rows more useful than the annual average alone.
Jamaica Plain's frost-free season lasts about 187 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 Jamaica Plain's middle-range seasonal profile. The measured spread is 46.2°F. The annual average is 51°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
Alongside its heating load, Jamaica Plain carries 49.4 inches of precipitation in a normal year, inside PlainClimate's wet range. Snowfall is not added to the interpretation because its annual value is missing. That distinction matters because a wet annual total can arrive as rain, snow, or a mixture at different times.
These labels group NOAA 1991-2020 normals from Jamaica Plain'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 Jamaica Plain, not an official NOAA class or a year-ahead forecast.
Questions about Jamaica Plain's climate
How much rain does Jamaica Plain get? ▼
How cold does Jamaica Plain get in winter? ▼
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Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Jamaica Plain's primary station: JAMAICA PLAIN (USC00193890). 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 Jamaica Plain; 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 Jamaica Plain 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.