Grimsley weather by month
What a typical year looks like in Grimsley, Tennessee: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Jamestown, 17 km from Grimsley; records cover 1969–2026.
The year at a glance
- Precipitation a year
- 59.2 in1503 mm
- Snow a year
- 19 in48 cm
- Last spring freeze
- Apr 23
- First fall freeze
- Oct 18
- Heating degree days
- 4,485
- Cooling degree days
- 961
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 6°−14° (heating, 99%) and 91°33° (cooling, 1%).
Month by month
Grimsley in January
Highs average 45°7° and lows 25°−4°, with 5 in128 mm of precipitation and 3 in8 cm of snow in a typical January.
- Record high
- 74°23° (2002)
- Record low
- −9°−23° (2024)
- Heating degree days
- 937
- Cooling degree days
- 0
Grimsley in February
Highs average 49°9° and lows 27°−3°, with 4.9 in123 mm of precipitation and 6 in14 cm of snow in a typical February.
- Record high
- 78°26° (2023)
- Record low
- −7°−22° (2015)
- Heating degree days
- 758
- Cooling degree days
- 0
Grimsley in March
Highs average 58°14° and lows 34°1°, with 5.5 in140 mm of precipitation and 5 in12 cm of snow in a typical March.
- Record high
- 84°29° (2007)
- Record low
- 7°−14° (2015)
- Heating degree days
- 591
- Cooling degree days
- 2
Grimsley in April
Highs average 68°20° and lows 42°6°, with 5.5 in139 mm of precipitation and 0.1 in0.3 cm of snow in a typical April.
- Record high
- 87°31° (2010)
- Record low
- 16°−9° (2007)
- Heating degree days
- 318
- Cooling degree days
- 14
Grimsley in May
Highs average 75°24° and lows 53°11°, with 5.3 in135 mm of precipitation in a typical May.
- Record high
- 89°32° (2006)
- Record low
- 27°−3° (2020)
- Heating degree days
- 115
- Cooling degree days
- 72
Grimsley in June
Highs average 82°28° and lows 60°16°, with 5.5 in140 mm of precipitation in a typical June.
- Record high
- 103°39° (2012)
- Record low
- 42°6° (2012)
- Heating degree days
- 9
- Cooling degree days
- 192
Grimsley in July
Highs average 84°29° and lows 64°18°, with 5.3 in134 mm of precipitation in a typical July.
- Record high
- 101°38° (2012)
- Record low
- 49°9° (2008)
- Heating degree days
- 1
- Cooling degree days
- 283
Grimsley in August
Highs average 84°29° and lows 63°17°, with 4.6 in118 mm of precipitation in a typical August.
- Record high
- 100°38° (2007)
- Record low
- 45°7° (2025)
- Heating degree days
- 2
- Cooling degree days
- 267
Grimsley in September
Highs average 78°26° and lows 56°13°, with 4 in102 mm of precipitation in a typical September.
- Record high
- 95°35° (2011)
- Record low
- 32°0° (2001)
- Heating degree days
- 54
- Cooling degree days
- 114
Grimsley in OctoberThis month
Highs average 69°20° and lows 44°7°, with 3.2 in81 mm of precipitation in a typical October.
- Record high
- 92°33° (2019)
- Record low
- 23°−5° (2001)
- Heating degree days
- 287
- Cooling degree days
- 16
Grimsley in November
Highs average 57°14° and lows 34°1°, with 4.1 in104 mm of precipitation and 0.3 in0.8 cm of snow in a typical November.
- Record high
- 81°27° (2016)
- Record low
- 11°−12° (2013)
- Heating degree days
- 581
- Cooling degree days
- 1
Grimsley in December
Highs average 48°9° and lows 28°−2°, with 6.3 in159 mm of precipitation and 5 in12 cm of snow in a typical December.
- Record high
- 75°24° (2007)
- Record low
- −5°−21° (2022)
- Heating degree days
- 832
- Cooling degree days
- 0