Eastport, Maine climate: Normal weather by month, frost dates and records
Eastport's normal year runs from 15°F January nights to 75°F August afternoons, with 47.6 inches of precipitation and 62 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 7.2°C, January lows of −9°C, August highs of 24°C, 1,210 mm of precipitation a year.
- NOAA stationEastport
- Station IDUSC00172426
- Location44.91°N 66.99°W
- Elevation85 ft (26 m)
- From the centerunder 1 mile
- Population1,292
On October 23, the normal high in Eastport is 54°F and the normal low 40°F, and the chance of measurable rain or snow is 36%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Eastport.
- Jan 30° 15°
- Feb 32° 17°
- Mar 39° 24°
- Apr 50° 34°
- May 60° 43°
- Jun 69° 49°
- Jul 75° 55°
- Aug 75° 56°
- Sep 67° 51°
- Oct 57° 42°
- Nov 46° 34°
- Dec 37° 23°
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 Eastport each month?
August is the warmest month, with normal highs of 75°F; January the coldest, with normal lows of 15°F. The most precipitation falls in October (5.14 in), the least in July (2.67 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 30°F | 15°F | 22.7°F | 4.20 | 15.3 | 12 | <1 | 30 | 9 h 10 min |
| February | 32°F | 17°F | 24.5°F | 3.20 | 13.7 | 11 | <1 | 26 | 10 h 20 min |
| March | 39°F | 24°F | 31.8°F | 4.08 | 12.7 | 12 | <1 | 26 | 11 h 50 min |
| April | 50°F | 34°F | 42.0°F | 4.45 | 4.1 | 11 | <1 | 13 | 13 h 30 min |
| May | 60°F | 43°F | 51.5°F | 3.27 | 0.0 | 12 | <1 | 1 | 14 h 50 min |
| June | 69°F | 49°F | 59.1°F | 3.87 | 0.0 | 13 | <1 | <1 | 15 h 30 min |
| July | 75°F | 55°F | 64.9°F | 2.67 | 0.0 | 12 | <1 | <1 | 15 h 20 min |
| August | 75°F | 56°F | 65.0°F | 3.24 | 0.0 | 10 | <1 | <1 | 14 h 10 min |
| September | 67°F | 51°F | 59.0°F | 4.32 | 0.0 | 11 | <1 | <1 | 12 h 40 min |
| October | 57°F | 42°F | 49.2°F | 5.14 | 0.1 | 11 | <1 | 3 | 11 h |
| November | 46°F | 34°F | 40.0°F | 4.64 | 1.6 | 12 | <1 | 15 | 9 h 40 min |
| December | 37°F | 23°F | 29.7°F | 4.57 | 14.3 | 14 | <1 | 26 | 8 h 50 min |
| Year (annual) | 53°F | 37°F | 45.0°F | 47.65 | 61.8 | 140 | 1 | 138 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | −1°C | −9°C | −5.2°C | 107 mm | 39 cm |
| February | 0°C | −8°C | −4.2°C | 81 mm | 35 cm |
| March | 4°C | −4°C | −0.1°C | 104 mm | 32 cm |
| April | 10°C | 1°C | 5.6°C | 113 mm | 10 cm |
| May | 16°C | 6°C | 10.8°C | 83 mm | 0 cm |
| June | 21°C | 10°C | 15.1°C | 98 mm | 0 cm |
| July | 24°C | 13°C | 18.3°C | 68 mm | 0 cm |
| August | 24°C | 13°C | 18.3°C | 82 mm | 0 cm |
| September | 20°C | 10°C | 15.0°C | 110 mm | 0 cm |
| October | 14°C | 5°C | 9.6°C | 131 mm | 0 cm |
| November | 8°C | 1°C | 4.4°C | 118 mm | 4 cm |
| December | 3°C | −5°C | −1.3°C | 116 mm | 36 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00172426; 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 Eastport?
Normal highs sit between 65°F and 85°F in June, July, August and September. Of those, August 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 USC00172426.
When is the last frost in Eastport?
In Eastport, the last spring frost (32°F) comes after April 29 in half of years and after May 11 in one year in ten; the first autumn frost comes before October 25 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 291 year in 10 after May 11; 9 in 10 after April 16
- First autumn frost, half of years before
- October 251 year in 10 before October 8; 9 in 10 before November 7
NOAA puts the median frost-free season at 178 days, and the season without a hard freeze (28°F) at 207 days.
A hard freeze (28°F) comes after April 12 in half of springs and before November 6 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Eastport in zone 6a in ZIP code 04631.
Frost dates for every NOAA station in Maine · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00172426; 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.
How hot and how cold does it get in Eastport?
In a normal year in Eastport, 1 day a year reaches 90°F, 138 nights fall to 32°F or colder and 140 days bring measurable precipitation.
- Days at 90°F or more
- 1a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 138a normal year
- Days that stay below freezing
- 48high of 32°F or less
- Days with 0.01 inch of precipitation
- 140a normal year
- Days with 1 inch of snow or more
- 16a normal year
The highest temperature in this station's record (since 1889) is 98°F, on July 17, 1999; the lowest is −23°F, on February 12, 1914.
The wettest calendar year on that record is 1979, with 67.78 in; the snowiest season is 1951–52, with 151.3 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00172426; records: ACIS (NOAA Regional Climate Centers), station USC00172426. Records use complete months only; a month missing more than three days is left out.
How sunny is Eastport?
Over a year 69% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Eastport, 3.6 kWh per square metre a day. September is the sunniest month (77%) and December the cloudiest (54%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 55% | 1.4 |
| February | 62% | 2.2 |
| March | 67% | 3.5 |
| April | 68% | 4.6 |
| May | 67% | 5.3 |
| June | 70% | 5.7 |
| July | 73% | 5.7 |
| August | 76% | 5.1 |
| September | 77% | 4.2 |
| October | 69% | 2.7 |
| November | 60% | 1.6 |
| December | 54% | 1.1 |
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 Eastport need?
A normal year in Eastport brings 7,404 heating degree days, 38% more than the median U.S. place (5,373), and 125 cooling degree days, 86% 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 1,651 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,311 | 0 |
| February | 1,134 | 0 |
| March | 1,031 | 0 |
| April | 690 | 0 |
| May | 420 | 2 |
| June | 187 | 12 |
| July | 55 | 52 |
| August | 49 | 49 |
| September | 191 | 11 |
| October | 492 | 0 |
| November | 750 | 0 |
| December | 1,094 | 0 |
| Year (annual) | 7,404 | 125 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00172426. 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 Eastport's climate compare?
Eastport is warmer than 26 of the other 41 places with their own NOAA record in Maine, and wetter than 24. Across the 7,247 U.S. stations with normals, its annual mean of 45.0°F is warmer than 19%.
In the Köppen classification computed from these normals, Eastport 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 Eastport share this climate record?
Lubec has no NOAA station with 1991-2020 normals of its 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.
- Lubec, ME1,237 people · 4 mi S
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 Eastport's climate
What is the coldest month in Eastport?
January, with a normal high of 30°F and a normal low of 15°F. The warmest is August (75°F by day, 56°F at night).
Does it snow in Eastport?
Yes: 62 inches in a normal year, falling on 30 days with 0.1 inch or more, the most in January (15.3 inches).
What is the rainiest month in Eastport?
October, with 5.14 in of precipitation in a normal year; the driest is July with 2.67 in.
What plant hardiness zone is Eastport in?
The USDA's 2023 map puts Eastport in zone 6a in ZIP code 04631.
How late can frost come in Eastport?
In half of years the last 32°F night comes after April 29; in one year in ten it comes after May 11. Waiting until May 11 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Maine climateThe statewide normals and every place in the state
- Robbinston, ME14 miles from this station, 44.2°F a year
- Woodland, ME26 miles from this station, 46.6°F a year
- Wesley, ME33 miles from this station, 44.3°F a year
- Jonesboro, ME37 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