Kennebunkport, Maine climate: Normal weather by month, frost dates and records
Kennebunkport's normal year runs from 13°F January nights to 77°F July afternoons, with 52.0 inches of precipitation and 49 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 7.4°C, January lows of −10°C, July highs of 25°C, 1,321 mm of precipitation a year.
- NOAA stationKennebunkport
- Station IDUSC00174193
- Location43.36°N 70.47°W
- Elevation20 ft (6 m)
- Population (town)3,708
- Census place1,450
On October 23, the normal high in Kennebunkport is 56°F and the normal low 35°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 Kennebunkport.
- Jan 33° 13°
- Feb 35° 14°
- Mar 41° 23°
- Apr 52° 32°
- May 62° 43°
- Jun 71° 52°
- Jul 77° 58°
- Aug 76° 57°
- Sep 69° 49°
- Oct 59° 38°
- Nov 48° 29°
- Dec 39° 20°
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 Kennebunkport each month?
July is the warmest month, with normal highs of 77°F; January the coldest, with normal lows of 13°F. The most precipitation falls in October (5.63 in), the least in January (3.65 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 33°F | 13°F | 22.9°F | 3.65 | 13.3 | 11 | <1 | 29 | 9 h 20 min |
| February | 35°F | 14°F | 24.7°F | 3.71 | 13.3 | 9 | <1 | 27 | 10 h 30 min |
| March | 41°F | 23°F | 32.0°F | 4.68 | 9.8 | 11 | <1 | 26 | 11 h 50 min |
| April | 52°F | 32°F | 42.1°F | 4.73 | 1.3 | 12 | <1 | 16 | 13 h 20 min |
| May | 62°F | 43°F | 52.1°F | 4.21 | 0.0 | 13 | <1 | 3 | 14 h 40 min |
| June | 71°F | 52°F | 61.5°F | 4.69 | 0.0 | 13 | 1 | <1 | 15 h 20 min |
| July | 77°F | 58°F | 67.3°F | 3.90 | 0.0 | 11 | 2 | <1 | 15 h 10 min |
| August | 76°F | 57°F | 66.2°F | 3.88 | 0.0 | 10 | 1 | <1 | 14 h |
| September | 69°F | 49°F | 59.1°F | 3.93 | 0.0 | 10 | <1 | 1 | 12 h 30 min |
| October | 59°F | 38°F | 48.1°F | 5.63 | 0.1 | 12 | <1 | 10 | 11 h 10 min |
| November | 48°F | 29°F | 38.7°F | 4.17 | 0.7 | 11 | <1 | 20 | 9 h 40 min |
| December | 39°F | 20°F | 29.4°F | 4.82 | 10.4 | 12 | <1 | 28 | 9 h |
| Year (annual) | 55°F | 36°F | 45.3°F | 52.00 | 48.9 | 134 | 4 | 160 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 0°C | −10°C | −5.1°C | 93 mm | 34 cm |
| February | 2°C | −10°C | −4.1°C | 94 mm | 34 cm |
| March | 5°C | −5°C | 0.0°C | 119 mm | 25 cm |
| April | 11°C | 0°C | 5.6°C | 120 mm | 3 cm |
| May | 16°C | 6°C | 11.2°C | 107 mm | 0 cm |
| June | 22°C | 11°C | 16.4°C | 119 mm | 0 cm |
| July | 25°C | 14°C | 19.6°C | 99 mm | 0 cm |
| August | 24°C | 14°C | 19.0°C | 99 mm | 0 cm |
| September | 21°C | 9°C | 15.1°C | 100 mm | 0 cm |
| October | 15°C | 3°C | 8.9°C | 143 mm | 0 cm |
| November | 9°C | −2°C | 3.7°C | 106 mm | 2 cm |
| December | 4°C | −7°C | −1.4°C | 122 mm | 26 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00174193; 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 Kennebunkport?
Normal highs sit between 65°F and 85°F in June, July, August and September. Of those, September has the fewest days with rain (10).
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 USC00174193.
When is the last frost in Kennebunkport?
In Kennebunkport, the last spring frost (32°F) comes after May 9 in half of years and after May 22 in one year in ten; the first autumn frost comes before October 3 in half of years and before September 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
- May 91 year in 10 after May 22; 9 in 10 after April 28
- First autumn frost, half of years before
- October 31 year in 10 before September 20; 9 in 10 before October 19
NOAA puts the median frost-free season at 146 days, and the season without a hard freeze (28°F) at 169 days.
A hard freeze (28°F) comes after April 29 in half of springs and before October 15 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Kennebunkport in zone 6a in ZIP code 04046, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Kennebunkport's NOAA station is in zone 6a: the coldest night of a typical year reaches −10°F (29 complete years).
Frost dates for every NOAA station in Maine · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00174193; 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 Kennebunkport?
In a normal year in Kennebunkport, 4 days a year reach 90°F, 160 nights fall to 32°F or colder and 134 days bring measurable precipitation.
- Days at 90°F or more
- 4a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 160a normal year
- Days that stay below freezing
- 39high of 32°F or less
- Days with 0.01 inch of precipitation
- 134a normal year
- Days with 1 inch of snow or more
- 15a normal year
The highest temperature in this station's record (since 1989) is 99°F, on June 25, 2025; the lowest is −20°F, on January 27, 1994.
The wettest calendar year on that record is 2010, with 70.68 in; the snowiest season is 2014–15, with 84.5 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00174193; records: ACIS (NOAA Regional Climate Centers), station USC00174193. Records use complete months only; a month missing more than three days is left out.
How sunny is Kennebunkport?
Over a year 72% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Kennebunkport, 3.8 kWh per square metre a day. August is the sunniest month (79%) and December the cloudiest (64%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 67% | 1.7 |
| February | 69% | 2.5 |
| March | 69% | 3.6 |
| April | 70% | 4.7 |
| May | 69% | 5.3 |
| June | 70% | 5.6 |
| July | 77% | 5.9 |
| August | 79% | 5.3 |
| September | 78% | 4.3 |
| October | 70% | 2.8 |
| November | 68% | 1.8 |
| December | 64% | 1.4 |
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 Kennebunkport need?
A normal year in Kennebunkport brings 7,380 heating degree days, 37% more than the median U.S. place (5,373), and 251 cooling degree days, 72% fewer than the median (908). Eight months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 1,878 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,305 | 0 |
| February | 1,130 | 0 |
| March | 1,025 | 0 |
| April | 686 | 0 |
| May | 403 | 4 |
| June | 139 | 35 |
| July | 33 | 105 |
| August | 45 | 84 |
| September | 198 | 21 |
| October | 526 | 1 |
| November | 788 | 0 |
| December | 1,104 | 0 |
| Year (annual) | 7,380 | 251 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00174193. 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 Kennebunkport been warmer than normal lately?
2025 averaged 45.6°F, 0.3°F above the 1991-2020 normal of 45.3°F. 5 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 47.8°F | +2.5°F | 53.39 | 28.5 |
| 2022 | 46.8°F | +1.5°F | 46.64 | 35.4 |
| 2023 | 48.0°F | +2.7°F | 64.16 | 35.7 |
| 2024 | 47.8°F | +2.5°F | 51.56 | 36.3 |
| 2025 | 45.6°F | +0.3°F | 38.63 | 54.2 |
Source: observed years: ACIS, station USC00174193. A year counts only with all twelve months complete.
How does Kennebunkport's climate compare?
Kennebunkport is warmer than 30 of the other 41 places with their own NOAA record in Maine, and wetter than 39. Across the 7,247 U.S. stations with normals, its annual mean of 45.3°F is warmer than 21%.
In the Köppen classification computed from these normals, Kennebunkport 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.
Which places near Kennebunkport share this climate record?
3 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.
- Biddeford, ME22,370 people · 7 mi NE
- Kennebunk, ME12,028 people · 4 mi NW
- West Kennebunk, ME1,367 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 Kennebunkport's climate
What is the coldest month in Kennebunkport?
January, with a normal high of 33°F and a normal low of 13°F. The warmest is July (77°F by day, 58°F at night).
Does it snow in Kennebunkport?
Yes: 49 inches in a normal year, falling on 19 days with 0.1 inch or more, the most in January (13.3 inches).
What is the rainiest month in Kennebunkport?
October, with 5.63 in of precipitation in a normal year; the driest is January with 3.65 in.
What plant hardiness zone is Kennebunkport in?
The USDA's 2023 map puts Kennebunkport in zone 6a in ZIP code 04046, the nearest ZIP area. By the same method at Kennebunkport's NOAA station, the coldest night of a typical year reaches −10°F (29 years, 1991-2020): zone 6a.
How late can frost come in Kennebunkport?
In half of years the last 32°F night comes after May 9; in one year in ten it comes after May 22. Waiting until May 22 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Maine climateThe statewide normals and every place in the state
- Cape Neddick, ME12 miles from this station, 46.9°F a year
- Sanford, ME17 miles from this station, 45.5°F a year
- Portland, ME22 miles from this station, 47.5°F a year
- Hollis, ME22 miles from this station, 44.0°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made