Groton Weather in March
Average highs run from 41°F on March 1 to 51°F on March 31, and lows from 19°F to 29°F. Normal precipitation for the month is 4.11 in.
March day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
March at a glance
- Average high
- 45°F
- Average low
- 24°F
- Precipitation
- 4.11 in
- Snowfall
- 10.1 in
- Record high
- 89°FMar 31, 1998
- Record low
- -12°FMar 7, 2003
- Chance of a freeze
- 100%
- Daylight
- 11 h 14 min to 12 h 41 min
- Cloud cover
- 62%
- Humidity
- 83%
- Dew point
- 29°F
- Wind
- 7.2 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| Mar 1 | 41°F | 19°F | 66°F 2017 | 2°F 2014 | 14% | |
| Mar 2 | 41°F | 20°F | 63°F 2017 | 4°F 2026 | 14% | |
| Mar 3 | 41°F | 20°F | 64°F 2002 | 1°F 2026 | 14% | |
| Mar 4 | 42°F | 20°F | 56°F 1999 | 0°F 2014 | 14% | |
| Mar 5 | 42°F | 21°F | 54°F 2025 | 7°F 2009 | 14% | |
| Mar 6 | 42°F | 21°F | 64°F 2022 | -3°F 2015 | 13% | |
| Mar 7 | 42°F | 21°F | 62°F 2000 | -12°F 2003 | 13% | |
| Mar 8 | 43°F | 22°F | 69°F 2012 | 0°F 2019 | 13% | |
| Mar 9 | 43°F | 22°F | 79°F 2016 | 2°F 2007 | 13% | |
| Mar 10 | 43°F | 22°F | 73°F 2026 | 3°F 2005 | 13% | |
| Mar 11 | 43°F | 23°F | 72°F 2021 | 8°F 2017 | 12% | |
| Mar 12 | 44°F | 23°F | 62°F 2021 | 6°F 2017 | 12% | |
| Mar 13 | 44°F | 23°F | 64°F 2016 | 6°F 1998 | 12% | |
| Mar 14 | 44°F | 23°F | 73°F 2012 | 4°F 2003 | 11% | |
| Mar 15 | 45°F | 24°F | 66°F 2025 | 13°F 2021 | 11% | |
| Mar 16 | 45°F | 24°F | 71°F 2000 | 15°F 2021 | 11% | |
| Mar 17 | 45°F | 24°F | 69°F 2003 | 14°F 2014 | 11% | |
| Mar 18 | 46°F | 25°F | 78°F 2012 | 9°F 2017 | 10% | |
| Mar 19 | 46°F | 25°F | 81°F 2012 | 13°F 2018 | 10% | |
| Mar 20 | 46°F | 25°F | 80°F 2012 | 13°F 2004 | 10% | |
| Mar 21 | 47°F | 26°F | 79°F 2012 | 14°F 2007 | 9% | |
| Mar 22 | 47°F | 26°F | 83°F 2012 | 13°F 2002 | 9% | |
| Mar 23 | 48°F | 26°F | 76°F 2012 | 15°F 2015 | 9% | |
| Mar 24 | 48°F | 27°F | 66°F 2000 | 14°F 2014 | 8% | |
| Mar 25 | 48°F | 27°F | 73°F 2021 | 13°F 2014 | 8% | |
| Mar 26 | 49°F | 27°F | 76°F 2021 | 20°F 2001 | 7% | |
| Mar 27 | 49°F | 28°F | 78°F 1998 | 17°F 2001 | 7% | |
| Mar 28 | 50°F | 28°F | 86°F 1998 | 17°F 2022 | 7% | |
| Mar 29 | 50°F | 28°F | 74°F 1998 | 17°F 2026 | 6% | |
| Mar 30 | 51°F | 29°F | 83°F 1998 | 20°F 2008 | 6% | |
| Mar 31 | 51°F | 29°F | 89°F 1998 | 23°F 2008 | 6% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (EDT).
- March 1
- sunrise 6:22 AM, sunset 5:36 PM
- March 31
- sunrise 6:30 AM, sunset 7:11 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00275703 (Nashua Cwsu), public domain. Records: NOAA GHCN-Daily, station USW00004780, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.