Climate Comfort Score
54/100
Moderate
NOAA 1991–2020 normals 46°F annual avg Public-domain federal data
Westport Island, ME Climate
Average temperature, precipitation, and a comfort score, drawn from NOAA NCEI 1991–2020 normals →
- 46°F
- Avg annual temp
- 54/100
- Comfort score
- 51.7"
- Annual precip
- 176d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Westport Island
Westport Island, Maine averages 46°F a year and scores 54/100 on the comfort index - moderate, milder than 27% of U.S. cities.
- 46°F
- annual average temperature (NOAA normal)
- 54/100
- comfort score, milder than 27% of U.S. cities
- 51.7"
- precipitation, annual total
- 176 days
- growing season, frost-free days
Based on NOAA U.S. Climate Normals (1991–2020) - 30-year averages describing the typical year, not a forecast.
Avg Temperature
46°F (8°C)
Avg High
54°F
Avg Low
38°F
Annual Precip
51.7"
Comfort Score
54/100
Moderate
Avg Annual Temperature
46°F
30-year mean (NOAA NCEI)
Annual Precipitation
51.7"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (Westport Island) 54.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Moderate for the Westport Island area.
How Westport Island compares to every U.S. city
Westport Island's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
54 Top 73% higher than 27% of 6,915 US cities
Each bar is a band; taller bars hold more US cities. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Warming context for Westport Island
MethodologyThe chart below traces how the U.S. land temperature anomaly has moved against the global mean since 1900. For Westport Island, the NOAA 1991-2020 normal captures average conditions across that spread - notably, the most recent decade runs warmer than the 30-year mean itself.
- United States land mean (NOAA NCEI) +0.11 °C/decade
- Global anomaly (NASA GISTEMP) +0.11 °C/decade
- Paris Agreement thresholds 1.5°C / 2.0°C
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 31°F (-1°C) | 14°F (-10°C) | 23°F (-5°C) | 4.4" | 29.5 | 0.0 |
| February | 33°F (1°C) | 16°F (-9°C) | 25°F (-4°C) | 3.9" | 27.6 | 0.0 |
| March | 41°F (5°C) | 24°F (-4°C) | 32°F (0°C) | 4.9" | 26.3 | 0.0 |
| April | 51°F (11°C) | 34°F (1°C) | 43°F (6°C) | 4.3" | 12.5 | 0.0 |
| May | 63°F (17°C) | 44°F (7°C) | 53°F (12°C) | 3.6" | 0.9 | 0.1 |
| June | 70°F (21°C) | 53°F (12°C) | 62°F (17°C) | 4.4" | 0.0 | 0.1 |
| July | 76°F (25°C) | 59°F (15°C) | 68°F (20°C) | 3.7" | 0.0 | 0.3 |
| August | 76°F (24°C) | 59°F (15°C) | 67°F (20°C) | 3.2" | 0.0 | 0.1 |
| September | 69°F (21°C) | 51°F (11°C) | 60°F (16°C) | 4.3" | 0.0 | 0.2 |
| October | 58°F (14°C) | 42°F (5°C) | 50°F (10°C) | 5.2" | 5.4 | 0.0 |
| November | 47°F (8°C) | 32°F (0°C) | 40°F (4°C) | 4.3" | 18.1 | 0.0 |
| December | 37°F (3°C) | 22°F (-6°C) | 29°F (-1°C) | 5.4" | 27.9 | 0.0 |
Monthly Precipitation
Average monthly rainfall
January 4.4"
12.5 days with precipitation
February 3.9"
10.1 days with precipitation
March 4.9"
11.2 days with precipitation
April 4.3"
11.8 days with precipitation
May 3.6"
14.7 days with precipitation
June 4.4"
15.7 days with precipitation
July 3.7"
12.3 days with precipitation
August 3.2"
11.7 days with precipitation
September 4.3"
9.0 days with precipitation
October 5.2"
13.8 days with precipitation
November 4.3"
12.5 days with precipitation
December 5.4"
12.8 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
October 21
50% probability date
Last Spring Freeze
April 28
50% probability date
Growing Season
176 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
7,165
Higher = more heating needed
Cooling Degree Days
265
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
What Westport Island's climate means for you
Westport Island runs 46°F a year - peaking in July, coldest in January.
- Gardeners get about 176 frost-free days, with the last spring freeze near April 28 - plan the planting calendar around it, not the regional average.
- Energy bills track 7,165 heating and 265 cooling degree days a year, higher means the furnace or AC runs more.
- Comparing places to live? Line this city up against nearby cities and the national rankings. See rankings
These are 30-year NOAA normals (1991–2020) - the typical year, not a forecast for any specific season.
Climate Guides
Climate Insight: Westport Island, ME
In Westport Island, Maine, the NOAA 1991–2020 climate normals put the annual average temperature at 46°F, ranging from a mean daily high of 54°F to a mean daily low of 38°F. July is typically the warmest month of the year, while January is the coldest. As thirty-year averages computed from station USC00179547, these numbers smooth out year-to-year noise into a working baseline for a typical month.
Rainfall (and snow, where it falls) shapes day-to-day life here as much as temperature does. Westport Island sees about 51.7 inches of precipitation a year, predominantly as rainfall. The frost-free season averages 176 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near April 28 and the first fall freeze near October 21. On the energy side, 7,165 heating degree days and 265 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Westport Island scores 54/100 (Moderate), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. Shoulder seasons bring the mildest highs and lows in the monthly tables above, summer brings July-driven heat, and winter brings January-driven cold - use that rhythm for planning. These figures are thirty-year averages rather than forecasts, so a specific year may still run warmer, cooler, wetter, or drier than what's shown.
Frequently Asked Questions
What is the average temperature in Westport Island, ME? ▼
The average annual temperature in Westport Island, Maine is 46°F. The warmest month averages 76°F (25°C) and the coldest averages 14°F (-10°C).
How much rain does Westport Island get? ▼
Westport Island receives 51.7 inches of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Westport Island? ▼
Westport Island has a climate comfort score of 54/100 (Moderate), milder than 27% of U.S. cities in the PlainClimate database.
When is the growing season in Westport Island? ▼
Westport Island has approximately 176 frost-free days per year, with the last spring freeze around April 28 and the first fall freeze around October 21.
How much energy does heating and cooling require in Westport Island? ▼
Westport Island has 7,165 heating degree days and 265 cooling degree days annually, a heating-dominated climate. See our <a href="/guides/reading-weather-data/" class="underline hover:text-brand-600">guide to reading weather data</a> for what these figures mean.
Where does this Westport Island climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00179547 near Westport Island.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00179547. For informational purposes only.
Read our methodology - how this data is sourced, computed, and verified.
Related
Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainClimate Editorial
Every figure on PlainClimate is rendered directly from NOAA 1991-2020 U.S. Climate Normals data, no number is typed in by an editor. This page draws directly on NOAA 1991-2020 U.S. Climate Normals data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.