Park climate1991–2020 climate normals21 m source elevationNASA POWER

Twelve month analysis of temperature, precipitation, humidity, and wind based on long term averages.

Great Bay National Estuarine Research Reserve Monthly Climate Normals and Annual Atmospheric Patterns

Name: Great Bay National Estuarine Research Reserve monthly climate normals
Creator: NASA POWER

The climate profile for Great Bay National Estuarine Research Reserve presents monthly averages for temperature, daily precipitation, relative humidity, wind speed, and daylight duration. Derived from NASA POWER data for the 1991 to 2020 period at a representative coordinate, these values define the expected annual climatological cycle for this nature reserve. Information here characterizes long term atmospheric norms rather than current weather conditions or regional variability across the reserve territory.

View park overview Browse climate zones

A flat-design, vector-style illustration of a coastal bay with tall cliffs, evergreen trees, calm water, and small boats under a setting or rising sun.

Annual climate pattern

Monthly temperature ranges and average daily precipitation normals across twelve recorded months

Great Bay National Estuarine Research Reserve Annual Climate and Temperature Patterns

Great Bay National Estuarine Research Reserve exhibits average monthly temperatures ranging from sub-zero winter minimums to warm summer maximums across the annual cycle. The climate normals also track average daily precipitation rates for each month based on multi-year coordinates.

Mean temperatureAverage minimum–maximum rangePrecipitation

Annual mean: 9 °C
Warmest month: August
Coolest month: January
Wettest month: December

Twelve-month climate

Comparing annual temperature bounds, precipitation rates, humidity, wind, and daylight across all twelve months

Great Bay National Estuarine Research Reserve Twelve Month Climate Records

Systematic climate records for Great Bay National Estuarine Research Reserve track average temperature extremes, daily precipitation rates, and atmospheric humidity across the full calendar year. Analyzing these monthly normals alongside calculated daylight hours and wind speeds reveals long-term environmental patterns at a representative park coordinate.

	Mean temperature	Precipitation	Humidity	Wind speed	Daylight
January	-1.9 °C-14.2° to 9.6°	3.5 mm/day	86.4%	5.7 m/s	9.2 hours
February	-1.4 °C-12.7° to 8.1°	3.6 mm/day	84.2%	5.6 m/s	10.3 hours
March	1.5 °C-9.3° to 11.6°	3.9 mm/day	82%	5.2 m/s	11.7 hours
April	6.2 °C-1.1° to 16.6°	3.8 mm/day	82%	4.3 m/s	13.2 hours
May	11.3 °C4.2° to 21.7°	3 mm/day	83.9%	3.6 m/s	14.5 hours
June	16.5 °C9.1° to 24.6°	3.4 mm/day	84.6%	3.2 m/s	15.1 hours
July	20.1 °C14.3° to 27.1°	2.8 mm/day	83%	2.9 m/s	14.8 hours
August	20.1 °C13.9° to 27.1°	2.9 mm/day	80.8%	3 m/s	13.7 hours
September	16.9 °C9.2° to 25.4°	3.2 mm/day	79.8%	3.6 m/s	12.3 hours
October	11.5 °C3.3° to 20.5°	4.1 mm/day	79.3%	4.5 m/s	10.8 hours
November	6.2 °C-2.7° to 15.7°	3.8 mm/day	80.4%	4.9 m/s	9.5 hours
December	1.5 °C-9.5° to 11.8°	4.3 mm/day	83.5%	5.5 m/s	8.9 hours

Compare two months

See two months side by side and how much they differ. Both use the same 1991–2020 climate normals and NASA POWER data point as the table above, so they show typical conditions, not a forecast.

First month

Second month

Mean temperature: January: -1.9 °C; August: 20.1 °C; Change from January to August: +22 °C
Precipitation: January: 3.5 mm/day; August: 2.9 mm/day; Change from January to August: -0.6 mm/day
Daylight: January: 9.2 hours; August: 13.7 hours; Change from January to August: +4.5 hours

Calculated climate highlights

Comparative analysis of long term monthly averages for temperature, precipitation, humidity, wind, and daylight duration.

Calculated Monthly Climate Highlights and Seasonal Extremes for Great Bay National Estuarine Research Reserve

Calculated monthly comparisons summarize the long term climatology baseline for Great Bay National Estuarine Research Reserve by identifying comparative highs and lows across twelve measured variables. These derived averages outline annual patterns at a single representative coordinate without recording historical weather extremes or local conditions.

Warmest month: August20.1 °C
Coolest month: January-1.9 °C
Wettest month: December4.3 mm/day
Driest month: July2.8 mm/day
Most humid month: January86.4%
Windiest month: January5.7 m/s
Longest daylight: June15.1 hours

Interactive climate map

National park climate map

Open the climate map to compare monthly temperature, precipitation, and other averages.

Global National Park Climate Map

Other park climates

Explore monthly temperature, precipitation, and atmospheric patterns across diverse regional landscapes.

Compare Great Bay National Estuarine Research Reserve Climate Normals With Other Protected Areas

Standardized monthly climate profiles allow systematic comparison of long-term temperature, precipitation, humidity, wind, and daylight records across diverse protected landscapes. Examining multiple geographic settings reveals broad environmental variation without implying direct atmospheric equivalence.