Groton Weather in March
Average highs run from 33°F on March 1 to 48°F on March 31, and lows from 14°F to 28°F. Normal precipitation for the month is 0.92 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
- 40°F
- Average low
- 21°F
- Precipitation
- 0.92 in
- Snowfall
- 6.7 in
- Record high
- 84°FMar 18, 2012
- Record low
- -20°FMar 3, 2019
- Chance of a freeze
- 100%
- Daylight
- 11 h 10 min to 12 h 45 min
- Cloud cover
- 67%
- Humidity
- 70%
- Dew point
- 23°F
- Wind
- 12.1 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 | 33°F | 14°F | 66°F 2024 | -13°F 2014 | 11% | |
| Mar 2 | 33°F | 15°F | 61°F 2021 | -19°F 2019 | 11% | |
| Mar 3 | 34°F | 15°F | 55°F 2025 | -20°F 2019 | 10% | |
| Mar 4 | 34°F | 16°F | 60°F 2021 | -14°F 2015 | 10% | |
| Mar 5 | 35°F | 16°F | 60°F 2017 | -17°F 2015 | 10% | |
| Mar 6 | 35°F | 17°F | 67°F 2016 | -2°F 2019 | 10% | |
| Mar 7 | 36°F | 17°F | 69°F 2016 | -3°F 2019 | 10% | |
| Mar 8 | 36°F | 18°F | 68°F 2026 | 12°F 2014 | 9% | |
| Mar 9 | 37°F | 18°F | 65°F 2021 | 3°F 2022 | 9% | |
| Mar 10 | 37°F | 19°F | 70°F 2025 | 0°F 2017 | 9% | |
| Mar 11 | 38°F | 19°F | 70°F 2024 | -10°F 2019 | 9% | |
| Mar 12 | 38°F | 20°F | 72°F 2016 | -6°F 2022 | 8% | |
| Mar 13 | 39°F | 20°F | 71°F 2012 | -7°F 2017 | 8% | |
| Mar 14 | 39°F | 21°F | 70°F 2015 | 4°F 2017 | 8% | |
| Mar 15 | 40°F | 21°F | 78°F 2015 | 1°F 2026 | 8% | |
| Mar 16 | 40°F | 22°F | 81°F 2012 | -4°F 2026 | 7% | |
| Mar 17 | 41°F | 22°F | 77°F 2012 | 2°F 2026 | 7% | |
| Mar 18 | 41°F | 22°F | 84°F 2012 | -3°F 2023 | 7% | |
| Mar 19 | 42°F | 23°F | 77°F 2026 | -5°F 2023 | 7% | |
| Mar 20 | 43°F | 23°F | 67°F 2022 | 1°F 2013 | 7% | |
| Mar 21 | 43°F | 24°F | 71°F 2026 | -3°F 2013 | 7% | |
| Mar 22 | 44°F | 24°F | 65°F 2012 | 1°F 2013 | 6% | |
| Mar 23 | 44°F | 25°F | 70°F 2012 | -1°F 2023 | 6% | |
| Mar 24 | 45°F | 25°F | 66°F 2012 | 2°F 2023 | 6% | |
| Mar 25 | 45°F | 25°F | 72°F 2026 | 8°F 2014 | 6% | |
| Mar 26 | 46°F | 26°F | 63°F 2012 | 1°F 2023 | 6% | |
| Mar 27 | 46°F | 26°F | 64°F 2025 | 2°F 2023 | 6% | |
| Mar 28 | 47°F | 26°F | 69°F 2026 | -2°F 2023 | 5% | |
| Mar 29 | 47°F | 27°F | 78°F 2021 | -11°F 2023 | 5% | |
| Mar 30 | 48°F | 27°F | 71°F 2012 | 9°F 2023 | 5% | |
| Mar 31 | 48°F | 28°F | 76°F 2012 | 9°F 2018 | 5% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (CDT).
- March 1
- sunrise 7:10 AM, sunset 6:20 PM
- March 31
- sunrise 7:14 AM, sunset 7:59 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00390120 (Andover #2), public domain. Records: NOAA GHCN-Daily, station USC00390022, 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 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.