August weather in Groton, NY
The average temperature in Groton in August is 66.4°F (55.2°F–77.6°F). Average precipitation: 4.09 inches.
August is a summer month in Groton, and is warmer than the annual average of 45.2°F. Daily temperatures swing about 22.4°F between overnight low and afternoon high. Expect about 11 days with precipitation. Daylight averages about 13h 44m. For travel, August is a comfortable month to visit.
Avg High
77.6°F
Avg Low
55.2°F
Precipitation
4.09 in
Daylight
13h 44m
August records in Groton
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| August 1 | 84.0°F (2011) | 51.1°F (2014) | 1.22 in (1979) |
| August 2 | 87.1°F (2011) | 48.0°F (2025) | 1.48 in (2021) |
| August 3 | 89.1°F (2020) | 46.0°F (2021) | 1.57 in (1961) |
| August 4 | 90.0°F (2022) | 51.1°F (2021) | 1.05 in (2001) |
| August 5 | 88.0°F (2012) | 43.0°F (2013) | 1.25 in (2022) |
| August 6 | 88.0°F (2018) | 46.0°F (2017) | 1.46 in (1948) |
| August 7 | 89.1°F (2018) | 46.9°F (2009) | 1.90 in (1977) |
| August 8 | 88.0°F (2022) | 44.1°F (2009) | 1.23 in (1958) |
| August 9 | 87.1°F (2012) | 46.9°F (2014) | 4.55 in (2013) |
| August 10 | 88.0°F (2012) | 51.1°F (2014) | 1.83 in (2016) |
| August 11 | 89.1°F (2009) | 46.9°F (2019) | 0.67 in (2009) |
| August 12 | 91.0°F (2020) | 46.9°F (2011) | 2.05 in (1948) |
| August 13 | 91.9°F (2025) | 45.0°F (2022) | 1.50 in (2004) |
| August 14 | 91.0°F (2016) | 45.0°F (2014) | 2.25 in (1994) |
| August 15 | 87.1°F (2009) | 41.0°F (2013) | 1.14 in (2012) |
| August 16 | 89.1°F (2009) | 45.0°F (2014) | 2.01 in (1986) |
| August 17 | 89.1°F (2009) | 44.1°F (2014) | 1.43 in (2001) |
| August 18 | 91.0°F (2009) | 48.9°F (2014) | 2.62 in (1994) |
| August 19 | 93.0°F (2009) | 44.1°F (2012) | 1.90 in (2021) |
| August 20 | 84.0°F (2016) | 42.1°F (2020) | 1.31 in (2006) |
| August 21 | 87.1°F (2022) | 45.0°F (2012) | 1.28 in (2004) |
| August 22 | 84.9°F (2020) | 48.0°F (2012) | 0.87 in (1994) |
| August 23 | 84.0°F (2017) | 46.0°F (2011) | 2.79 in (1948) |
| August 24 | 89.1°F (2020) | 45.0°F (2019) | 1.25 in (1975) |
| August 25 | 89.1°F (2020) | 46.9°F (2017) | 2.18 in (2007) |
| August 26 | 88.0°F (2021) | 39.9°F (2017) | 1.61 in (1961) |
| August 27 | 84.9°F (2021) | 42.1°F (2017) | 1.08 in (2013) |
| August 28 | 84.0°F (2016) | 41.0°F (2025) | 1.85 in (1962) |
| August 29 | 89.1°F (2018) | 43.0°F (2014) | 1.73 in (1949) |
| August 30 | 90.0°F (2022) | 41.0°F (2012) | 1.20 in (2004) |
| August 31 | 82.9°F (2013) | 43.0°F (2017) | 3.13 in (1954) |