Jamaica Plain, Massachusetts climate: Climate normals at a NOAA weather station
Jamaica Plain's normal year runs from 19°F January nights to 85°F July afternoons, with 49.4 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 10.7°C, January lows of −7°C, July highs of 29°C, 1,254 mm of precipitation a year.
- NOAA stationJamaica Plain
- Station IDUSC00193890
- Location42.30°N 71.12°W
- Elevation95 ft (29 m)
On October 23, the normal high in Jamaica Plain is 61°F and the normal low 41°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Jamaica Plain.
- Jan 37° 19°
- Feb 40° 21°
- Mar 47° 28°
- Apr 59° 38°
- May 69° 48°
- Jun 79° 58°
- Jul 85° 64°
- Aug 83° 63°
- Sep 76° 55°
- Oct 64° 43°
- Nov 53° 34°
- Dec 42° 26°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like at Jamaica Plain each month?
July is the warmest month, with normal highs of 85°F; January the coldest, with normal lows of 19°F. The most precipitation falls in December (5.08 in), the least in July (3.49 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 37°F | 19°F | 28.2°F | 3.87 | – | <1 | 28 | 9 h 20 min |
| February | 40°F | 21°F | 30.3°F | 3.59 | – | <1 | 24 | 10 h 30 min |
| March | 47°F | 28°F | 37.5°F | 4.49 | – | <1 | 20 | 11 h 50 min |
| April | 59°F | 38°F | 48.5°F | 4.32 | – | <1 | 7 | 13 h 20 min |
| May | 69°F | 48°F | 58.8°F | 3.64 | – | 1 | <1 | 14 h 30 min |
| June | 79°F | 58°F | 68.4°F | 4.18 | – | 3 | <1 | 15 h 20 min |
| July | 85°F | 64°F | 74.4°F | 3.49 | – | 9 | <1 | 15 h |
| August | 83°F | 63°F | 72.8°F | 3.72 | – | 6 | <1 | 14 h |
| September | 76°F | 55°F | 65.2°F | 3.96 | – | 1 | <1 | 12 h 30 min |
| October | 64°F | 43°F | 53.3°F | 5.03 | – | <1 | 3 | 11 h 10 min |
| November | 53°F | 34°F | 43.4°F | 3.99 | – | <1 | 14 | 9 h 50 min |
| December | 42°F | 26°F | 34.0°F | 5.08 | – | <1 | 24 | 9 h 10 min |
| Year (annual) | 61°F | 41°F | 51.2°F | 49.36 | – | 20 | 121 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 3°C | −7°C | −2.1°C | 98 mm |
| February | 4°C | −6°C | −0.9°C | 91 mm |
| March | 8°C | −2°C | 3.1°C | 114 mm |
| April | 15°C | 3°C | 9.2°C | 110 mm |
| May | 21°C | 9°C | 14.9°C | 92 mm |
| June | 26°C | 14°C | 20.2°C | 106 mm |
| July | 29°C | 18°C | 23.6°C | 89 mm |
| August | 28°C | 17°C | 22.7°C | 94 mm |
| September | 24°C | 13°C | 18.4°C | 101 mm |
| October | 18°C | 6°C | 11.8°C | 128 mm |
| November | 11°C | 1°C | 6.3°C | 101 mm |
| December | 6°C | −4°C | 1.1°C | 129 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Blue Hill (6 miles away), gets 69 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00193890; 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.
Which months are mildest at Jamaica Plain?
Normal highs sit between 65°F and 85°F in May, June, July, August and September.
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 USC00193890.
When is the last frost at Jamaica Plain?
In Jamaica Plain, the last spring frost (32°F) comes after April 19 in half of years and after May 3 in one year in ten; the first autumn frost comes before October 23 in half of years and before October 8 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 191 year in 10 after May 3; 9 in 10 after April 6
- First autumn frost, half of years before
- October 231 year in 10 before October 8; 9 in 10 before November 5
NOAA puts the median frost-free season at 185 days, and the season without a hard freeze (28°F) at 210 days.
A hard freeze (28°F) comes after April 5 in half of springs and before November 3 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Jamaica Plain in zone 6b in ZIP code 02130, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, the station is in zone 6b: the coldest night of a typical year reaches 0°F (22 complete years).
Frost dates for every NOAA station in Massachusetts · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00193890; 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 at Jamaica Plain?
In a normal year in Jamaica Plain, 20 days a year reach 90°F and 121 nights fall to 32°F or colder.
- Days at 90°F or more
- 20a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 121a normal year
- Days that stay below freezing
- 26high of 32°F or less
The highest temperature in this station's record (since 1962) is 103°F, on June 25, 2025; the lowest is −11°F, on February 4, 2023.
The wettest calendar year on that record is 2018, with 61.28 in; the snowiest season is 2014–15, with 90.2 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00193890; records: ACIS (NOAA Regional Climate Centers), station USC00193890. Records use complete months only; a month missing more than three days is left out.
How sunny is it at Jamaica Plain?
Over a year 72% of the sunlight that would reach the ground under clear skies gets through the clouds at Jamaica Plain, 3.8 kWh per square metre a day. August is the sunniest month (78%) and December the cloudiest (66%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 69% | 1.8 |
| February | 70% | 2.7 |
| March | 69% | 3.7 |
| April | 69% | 4.7 |
| May | 68% | 5.3 |
| June | 71% | 5.7 |
| July | 78% | 6.0 |
| August | 78% | 5.3 |
| September | 77% | 4.3 |
| October | 68% | 2.8 |
| November | 70% | 2.0 |
| December | 66% | 1.5 |
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 many heating and cooling degree days does Jamaica Plain record?
A normal year at Jamaica Plain brings 5,811 heating degree days, 8% more than the median U.S. place (5,373), and 827 cooling degree days, 9% 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 3,047 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,141 | 0 |
| February | 972 | 0 |
| March | 853 | 0 |
| April | 501 | 5 |
| May | 225 | 33 |
| June | 46 | 146 |
| July | 4 | 294 |
| August | 6 | 248 |
| September | 87 | 93 |
| October | 369 | 8 |
| November | 648 | 0 |
| December | 959 | 0 |
| Year (annual) | 5,811 | 827 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00193890. 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.
Have recent years at Jamaica Plain been warmer than normal?
2025 averaged 51.8°F, 0.6°F above the 1991-2020 normal of 51.2°F. 5 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 53.3°F | +2.1°F | 60.50 |
| 2022 | 53.1°F | +1.9°F | 40.10 |
| 2023 | 53.6°F | +2.4°F | 59.37 |
| 2024 | 53.6°F | +2.4°F | 49.17 |
| 2025 | 51.8°F | +0.6°F | 47.62 |
Over 50 complete years from 1963 to 2025, the station's annual mean temperature rose at a fitted 6.2°F per century (+0.34°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00193890; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Jamaica Plain's climate compare?
Jamaica Plain is warmer than 29 of the 35 places with their own NOAA record in Massachusetts, and wetter than 24. Across the 7,247 U.S. stations with normals, its annual mean of 51.2°F is warmer than 46%.
In the Köppen classification computed from these normals, Jamaica Plain 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 Jamaica Plain share this climate record?
5 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.
- Cambridge, MAalso near: Boston (6 mi, 51.9°F a year); Reading (10 mi, 50.6°F a year)121,186 people · 5 mi N
- Newton, MAalso near: Natick (8 mi, 48.9°F a year); Blue Hill (10 mi, 49.7°F a year)90,700 people · 5 mi NW
- Brookline, MAalso near: Boston (7 mi, 51.9°F a year); Blue Hill (8 mi, 49.7°F a year)63,925 people · 2 mi NW
- Watertown, MA35,985 people · 5 mi NW
- Belmont, MA27,442 people · 7 mi NW
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 Jamaica Plain's climate
What is the coldest month at Jamaica Plain?
January, with a normal high of 37°F and a normal low of 19°F. The warmest is July (85°F by day, 64°F at night).
Does it snow at Jamaica Plain?
Yes. NOAA publishes no 1991-2020 snowfall normal for the station; the nearest record that keeps one, Blue Hill (6 miles away), records 69 inches of snow in a normal year.
What is the rainiest month at Jamaica Plain?
December, with 5.08 in of precipitation in a normal year; the driest is July with 3.49 in.
What plant hardiness zone is Jamaica Plain in?
The USDA's 2023 map puts Jamaica Plain in zone 6b in ZIP code 02130, the nearest ZIP area. By the same method at the station, the coldest night of a typical year reaches 0°F (22 years, 1991-2020): zone 6b.
How late can frost come at Jamaica Plain?
In half of years the last 32°F night comes after April 19; in one year in ten it comes after May 3. Waiting until May 3 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Massachusetts climateThe statewide normals and every place in the state
- Blue Hill, MA6 miles from this station, 49.7°F a year
- Boston, MA7 miles from this station, 51.9°F a year
- Norwood, MA8 miles from this station, 52.0°F a year
- Natick, MA11 miles from this station, 48.9°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made