Groton September Weather Averages

Massachusetts, United States of America

September Weather Averages for Groton

High Temp23°C74°F
Low Temp13°C55°F
Avg Temp18°C64°F
Sunshine Hours201 hours 
Rainfall101.61 mm4.00 In
Rain days6 days 
Pressure1018 mb31 In

 

Groton September Averages Year by Year

YearHigh TempLow TempAvg TempSunshine HoursRainfallRain daysPressure
200921°C / 70°F11°C / 52°F16°C / 61°F242 hours36.33 mm / 1.43 In3 days1018 mb / 31 In
201024°C / 74°F14°C / 57°F18°C / 65°F215 hours61.41 mm / 2.42 In5 days1014 mb / 30 In
201123°C / 74°F14°C / 56°F18°C / 64°F192 hours134.87 mm / 5.31 In8 days1017 mb / 31 In
201222°C / 71°F12°C / 53°F17°C / 62°F240 hours104.01 mm / 4.09 In8 days1016 mb / 30 In
201322°C / 72°F11°C / 52°F16°C / 62°F244 hours85.53 mm / 3.37 In6 days1015 mb / 30 In
201423°C / 74°F12°C / 54°F17°C / 63°F256 hours16.40 mm / 0.65 In4 days1019 mb / 31 In
201525°C / 77°F14°C / 57°F19°C / 66°F192 hours131.37 mm / 5.17 In4 days1018 mb / 31 In
201624°C / 76°F14°C / 57°F19°C / 66°F219 hours60.03 mm / 2.36 In6 days1019 mb / 31 In
201725°C / 77°F15°C / 58°F19°C / 66°F207 hours61.36 mm / 2.42 In6 days1016 mb / 30 In
201824°C / 75°F14°C / 58°F19°C / 66°F154 hours135.49 mm / 5.33 In6 days1022 mb / 31 In
201924°C / 75°F12°C / 54°F17°C / 63°F245 hours36.37 mm / 1.43 In4 days1019 mb / 31 In
202024°C / 75°F13°C / 56°F18°C / 65°F214 hours34.25 mm / 1.35 In5 days1019 mb / 31 In
202123°C / 74°F13°C / 56°F18°C / 65°F170 hours153.00 mm / 6.02 In10 days1016 mb / 30 In
202223°C / 73°F12°C / 54°F17°C / 62°F177 hours145.50 mm / 5.73 In5 days1016 mb / 30 In
202324°C / 75°F13°C / 55°F18°C / 64°F165 hours160.98 mm / 6.34 In7 days1018 mb / 31 In
202422°C / 71°F12°C / 54°F17°C / 62°F165 hours198.50 mm / 7.82 In5 days1020 mb / 31 In
202523°C / 73°F14°C / 57°F18°C / 64°F175 hours136.40 mm / 5.37 In6 days1019 mb / 31 In
202622°C / 71°F12°C / 54°F17°C / 62°F141 hours137.10 mm / 5.40 In13 days1018 mb / 31 In

Need more than one day of Groton history?

Download historical weather for Groton, or any other location, in CSV from January 2009 onwards. Ideal for research, insurance, energy, agriculture and machine-learning projects.

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Weather history near Groton

Region

Massachusetts

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Groton weather history: common questions

How far back does Groton weather history go?

Hourly historical weather is available from 1 January 2009. Choose a date above, or pick a month at the top of the page for long-term averages.

Can I download Groton historical weather as a file?

Yes. Buy historical weather data as daily or hourly CSV, yearly monthly averages or monthly climate averages. A free sample download is available.

Is there an API for historical weather?

Yes. The WeatherAPI.com History API returns hourly weather for any past date from 2010, as JSON or XML. Get a free API key.

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