Bridgewater, Massachusetts climate: Normal weather by month, frost dates and records
Bridgewater's normal year runs from 17°F January nights to 83°F July afternoons, with 51.0 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 9.6°C, January lows of −8°C, July highs of 28°C, 1,294 mm of precipitation a year.
- NOAA stationBridgewater
- Station IDUSC00190840
- Location41.95°N 70.96°W
- Elevation40 ft (12 m)
- From the center2 miles
- Population29,167
On October 23, the normal high in Bridgewater is 61°F and the normal low 38°F, and the chance of measurable rain or snow is 38%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Bridgewater.
- Jan 38° 17°
- Feb 40° 18°
- Mar 47° 26°
- Apr 58° 35°
- May 68° 45°
- Jun 77° 54°
- Jul 83° 60°
- Aug 81° 58°
- Sep 74° 50°
- Oct 63° 40°
- Nov 53° 31°
- Dec 43° 24°
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 Bridgewater each month?
July is the warmest month, with normal highs of 83°F; January the coldest, with normal lows of 17°F. The most precipitation falls in March (5.18 in), the least in August (2.74 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 38°F | 17°F | 27.4°F | 4.16 | 9 | <1 | 29 | 9 h 30 min |
| February | 40°F | 18°F | 29.2°F | 3.36 | 10 | <1 | 26 | 10 h 30 min |
| March | 47°F | 26°F | 36.4°F | 5.18 | 10 | <1 | 23 | 11 h 50 min |
| April | 58°F | 35°F | 46.3°F | 4.76 | 12 | <1 | 12 | 13 h 20 min |
| May | 68°F | 45°F | 56.3°F | 3.79 | 12 | <1 | 1 | 14 h 30 min |
| June | 77°F | 54°F | 65.2°F | 4.11 | 11 | 2 | <1 | 15 h 10 min |
| July | 83°F | 60°F | 71.4°F | 4.25 | 9 | 5 | <1 | 15 h |
| August | 81°F | 58°F | 69.4°F | 2.74 | 8 | 3 | <1 | 14 h |
| September | 74°F | 50°F | 62.2°F | 4.29 | 8 | 1 | 1 | 12 h 30 min |
| October | 63°F | 40°F | 51.5°F | 5.05 | 13 | <1 | 6 | 11 h 10 min |
| November | 53°F | 31°F | 42.0°F | 4.61 | 11 | <1 | 19 | 9 h 50 min |
| December | 43°F | 24°F | 33.6°F | 4.66 | 12 | <1 | 26 | 9 h 10 min |
| Year (annual) | 60°F | 38°F | 49.2°F | 50.96 | 125 | 10 | 142 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 3°C | −8°C | −2.6°C | 106 mm |
| February | 4°C | −8°C | −1.6°C | 85 mm |
| March | 8°C | −3°C | 2.4°C | 132 mm |
| April | 14°C | 2°C | 7.9°C | 121 mm |
| May | 20°C | 7°C | 13.5°C | 96 mm |
| June | 25°C | 12°C | 18.4°C | 104 mm |
| July | 28°C | 16°C | 21.9°C | 108 mm |
| August | 27°C | 14°C | 20.8°C | 70 mm |
| September | 23°C | 10°C | 16.8°C | 109 mm |
| October | 17°C | 4°C | 10.8°C | 128 mm |
| November | 12°C | 0°C | 5.6°C | 117 mm |
| December | 6°C | −4°C | 0.9°C | 118 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Middleboro (6 miles away), gets 42 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00190840; 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 Bridgewater?
Normal highs sit between 65°F and 85°F in May, June, July, August and September. Of those, September has the fewest days with rain (8).
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 USC00190840.
When is the last frost in Bridgewater?
In Bridgewater, the last spring frost (32°F) comes after May 1 in half of years and after May 15 in one year in ten; the first autumn frost comes before October 9 in half of years and before September 26 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
- May 11 year in 10 after May 15; 9 in 10 after April 20
- First autumn frost, half of years before
- October 91 year in 10 before September 26; 9 in 10 before October 25
NOAA puts the median frost-free season at 161 days, and the season without a hard freeze (28°F) at 188 days.
A hard freeze (28°F) comes after April 18 in half of springs and before October 24 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Bridgewater in zone 6b across its 2 ZIP code areas (6b in 02324, the largest).
Frost dates for every NOAA station in Massachusetts · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00190840; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
What hardiness zone is each Bridgewater ZIP code in?
The USDA's 2023 map gives each ZIP code area one zone. Bridgewater's 2 ZIP code areas are all in zone 6b. Each ZIP's frost dates are in the frost tool.
Source: USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; ZIP areas in the place: Census Bureau 2020 ZCTA-to-place relationship file. A ZIP area counts when at least a tenth of its land (and 0.5 km²) lies in the place.
How hot and how cold does it get in Bridgewater?
In a normal year in Bridgewater, 10 days a year reach 90°F, 142 nights fall to 32°F or colder and 125 days bring measurable precipitation.
- Days at 90°F or more
- 10a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 142a normal year
- Days that stay below freezing
- 22high of 32°F or less
- Days with 0.01 inch of precipitation
- 125a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00190840.
How sunny is Bridgewater?
Over a year 74% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Bridgewater, 3.9 kWh per square metre a day. August is the sunniest month (80%) and December the cloudiest (65%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 67% | 1.8 |
| February | 70% | 2.7 |
| March | 70% | 3.7 |
| April | 72% | 4.9 |
| May | 72% | 5.5 |
| June | 74% | 5.9 |
| July | 80% | 6.0 |
| August | 80% | 5.4 |
| September | 79% | 4.4 |
| October | 72% | 3.0 |
| November | 70% | 2.0 |
| December | 65% | 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 much heating and cooling does Bridgewater need?
A normal year in Bridgewater brings 6,230 heating degree days, 16% more than the median U.S. place (5,373), and 522 cooling degree days, 42% 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 2,522 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,164 | 0 |
| February | 1,002 | 0 |
| March | 888 | 0 |
| April | 562 | 2 |
| May | 282 | 13 |
| June | 74 | 80 |
| July | 11 | 208 |
| August | 21 | 157 |
| September | 139 | 57 |
| October | 424 | 5 |
| November | 690 | 0 |
| December | 973 | 0 |
| Year (annual) | 6,230 | 522 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00190840. 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.
Has Bridgewater been warmer than normal lately?
2021 averaged 51.6°F, 2.4°F above the 1991-2020 normal of 49.2°F.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 51.6°F | +2.4°F | 59.57 |
Source: observed years: ACIS, station USC00190840. A year counts only with all twelve months complete.
How does Bridgewater's climate compare?
Bridgewater is warmer than 14 of the other 34 places with their own NOAA record in Massachusetts, and wetter than 30. Across the 7,247 U.S. stations with normals, its annual mean of 49.2°F is warmer than 37%.
In the Köppen classification computed from these normals, Bridgewater is Dfb: continental, no dry season, warm 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.
Questions about Bridgewater's climate
What is the coldest month in Bridgewater?
January, with a normal high of 38°F and a normal low of 17°F. The warmest is July (83°F by day, 60°F at night).
Does it snow in Bridgewater?
Yes. NOAA publishes no 1991-2020 snowfall normal for Bridgewater's NOAA station; the nearest record that keeps one, Middleboro (6 miles away), records 42 inches of snow in a normal year.
What is the rainiest month in Bridgewater?
March, with 5.18 in of precipitation in a normal year; the driest is August with 2.74 in.
What plant hardiness zone is Bridgewater in?
The USDA's 2023 map puts Bridgewater in zone 6b across its 2 ZIP code areas (6b in 02324, the largest).
How late can frost come in Bridgewater?
In half of years the last 32°F night comes after May 1; in one year in ten it comes after May 15. Waiting until May 15 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Massachusetts climateThe statewide normals and every place in the state
- Middleboro, MA6 miles from this station, 49.5°F a year
- Taunton, MA6 miles from this station, 50.5°F a year
- Brockton, MA7 miles from this station, 51.4°F a year
- NWS Boston/Norton, MA9 miles from this station, 50.0°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made