Acadia National Park, Maine climate: Climate normals at a NOAA weather station
Acadia National Park's normal year runs from 15°F January nights to 79°F July afternoons, with 55.5 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 8.5°C, January lows of −9°C, July highs of 26°C, 1,411 mm of precipitation a year.
- NOAA stationAcadia National Park
- Station IDUSC00170100
- Location44.37°N 68.26°W
- Elevation470 ft (143 m)
On October 23, the normal high in Acadia National Park is 56°F and the normal low 41°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 Acadia National Park.
- Jan 33° 15°
- Feb 35° 18°
- Mar 42° 25°
- Apr 53° 35°
- May 65° 45°
- Jun 74° 54°
- Jul 79° 60°
- Aug 78° 60°
- Sep 71° 53°
- Oct 59° 43°
- Nov 48° 33°
- Dec 38° 22°
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 Acadia National Park each month?
July is the warmest month, with normal highs of 79°F; January the coldest, with normal lows of 15°F. The most precipitation falls in November (5.89 in), the least in July (3.27 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 33°F | 15°F | 23.8°F | 4.48 | 12 | <1 | 29 | 9 h 10 min |
| February | 35°F | 18°F | 26.2°F | 3.84 | 10 | <1 | 26 | 10 h 30 min |
| March | 42°F | 25°F | 33.3°F | 4.94 | 12 | <1 | 26 | 11 h 50 min |
| April | 53°F | 35°F | 44.0°F | 5.15 | 12 | <1 | 13 | 13 h 20 min |
| May | 65°F | 45°F | 54.7°F | 4.50 | 14 | <1 | 1 | 14 h 40 min |
| June | 74°F | 54°F | 63.9°F | 4.28 | 12 | 1 | <1 | 15 h 30 min |
| July | 79°F | 60°F | 69.7°F | 3.27 | 11 | 1 | <1 | 15 h 10 min |
| August | 78°F | 60°F | 69.0°F | 3.45 | 9 | 1 | <1 | 14 h 10 min |
| September | 71°F | 53°F | 61.9°F | 4.22 | 11 | <1 | <1 | 12 h 40 min |
| October | 59°F | 43°F | 50.6°F | 5.86 | 12 | <1 | 5 | 11 h |
| November | 48°F | 33°F | 40.3°F | 5.89 | 11 | <1 | 16 | 9 h 40 min |
| December | 38°F | 22°F | 30.1°F | 5.66 | 14 | <1 | 26 | 8 h 50 min |
| Year (annual) | 56°F | 39°F | 47.3°F | 55.54 | 139 | 3 | 141 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 0°C | −9°C | −4.6°C | 114 mm |
| February | 2°C | −8°C | −3.2°C | 98 mm |
| March | 5°C | −4°C | 0.7°C | 125 mm |
| April | 12°C | 2°C | 6.7°C | 131 mm |
| May | 18°C | 7°C | 12.6°C | 114 mm |
| June | 23°C | 12°C | 17.7°C | 109 mm |
| July | 26°C | 16°C | 20.9°C | 83 mm |
| August | 26°C | 15°C | 20.6°C | 88 mm |
| September | 22°C | 12°C | 16.6°C | 107 mm |
| October | 15°C | 6°C | 10.3°C | 149 mm |
| November | 9°C | 0°C | 4.6°C | 150 mm |
| December | 3°C | −5°C | −1.1°C | 144 mm |
NOAA publishes no 1991-2020 snowfall normal for this station, and no record within 25 miles keeps one, so snow is left out here rather than estimated.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00170100; 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 Acadia National Park?
Normal highs sit between 65°F and 85°F in June, July, August and September. Of those, August has the fewest days with rain (9).
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 USC00170100.
When is the last frost at Acadia National Park?
In Acadia National Park, the last spring frost (32°F) comes after April 27 in half of years and after May 8 in one year in ten; the first autumn frost comes before October 22 in half of years and before October 6 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 271 year in 10 after May 8; 9 in 10 after April 15
- First autumn frost, half of years before
- October 221 year in 10 before October 6; 9 in 10 before November 5
NOAA puts the median frost-free season at 177 days, and the season without a hard freeze (28°F) at 201 days.
A hard freeze (28°F) comes after April 15 in half of springs and before November 2 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Acadia National Park in zone 6a in ZIP code 04609, 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 6a: the coldest night of a typical year reaches −9°F (16 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 USC00170100; 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 Acadia National Park?
In a normal year in Acadia National Park, 3 days a year reach 90°F, 141 nights fall to 32°F or colder and 139 days bring measurable precipitation.
- Days at 90°F or more
- 3a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 141a normal year
- Days that stay below freezing
- 40high of 32°F or less
- Days with 0.01 inch of precipitation
- 139a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00170100.
How sunny is it at Acadia National Park?
Over a year 70% of the sunlight that would reach the ground under clear skies gets through the clouds at Acadia National Park, 3.7 kWh per square metre a day. September is the sunniest month (77%) and December the cloudiest (61%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 65% | 1.6 |
| February | 67% | 2.4 |
| March | 69% | 3.6 |
| April | 67% | 4.6 |
| May | 67% | 5.3 |
| June | 69% | 5.6 |
| July | 75% | 5.8 |
| August | 77% | 5.2 |
| September | 77% | 4.2 |
| October | 69% | 2.7 |
| November | 65% | 1.7 |
| December | 61% | 1.3 |
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 Acadia National Park record?
A normal year at Acadia National Park brings 6,835 heating degree days, 27% more than the median U.S. place (5,373), and 411 cooling degree days, 55% 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 2,291 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,277 | 0 |
| February | 1,086 | 0 |
| March | 983 | 0 |
| April | 630 | 0 |
| May | 331 | 10 |
| June | 94 | 60 |
| July | 14 | 161 |
| August | 15 | 139 |
| September | 133 | 39 |
| October | 447 | 2 |
| November | 743 | 0 |
| December | 1,082 | 0 |
| Year (annual) | 6,835 | 411 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00170100. 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.
How does Acadia National Park's climate compare?
Acadia National Park is warmer than 41 of the 42 places with their own NOAA record in Maine, and wetter than 40. Across the 7,247 U.S. stations with normals, its annual mean of 47.3°F is warmer than 29%.
In the Köppen classification computed from these normals, Acadia National Park 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 Acadia National Park share this climate record?
4 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.
- Bar Harbor, ME5,326 people · 2 mi E
- Southwest Harbor, ME1,846 people · 7 mi SW
- Northeast Harbor, ME410 people · 6 mi S
- Winter Harbor, ME482 people · 8 mi E
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 Acadia National Park's climate
What is the coldest month at Acadia National Park?
January, with a normal high of 33°F and a normal low of 15°F. The warmest is July (79°F by day, 60°F at night).
What is the rainiest month at Acadia National Park?
November, with 5.89 in of precipitation in a normal year; the driest is July with 3.27 in.
What plant hardiness zone is Acadia National Park in?
The USDA's 2023 map puts Acadia National Park in zone 6a in ZIP code 04609, the nearest ZIP area. By the same method at the station, the coldest night of a typical year reaches −9°F (16 years, 1991-2020): zone 6a.
How late can frost come at Acadia National Park?
In half of years the last 32°F night comes after April 27; in one year in ten it comes after May 8. Waiting until May 8 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Maine climateThe statewide normals and every place in the state
- East Surry, ME13 miles from this station, 44.5°F a year
- Jonesboro, ME35 miles from this station, 44.0°F a year
- Belfast, ME36 miles from this station, 44.1°F a year
- Bangor, ME40 miles from this station, 45.0°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made