Grayson weather by month
What a typical year looks like in Grayson, Kentucky: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Olive Hill 5ne, 15 km from Grayson; records cover 2000–2026.
The year at a glance
- Precipitation a year
- 49.8 in1265 mm
- Snow a year
- 18 in44 cm
- Last spring freeze
- Apr 29
- First fall freeze
- Oct 17
- Heating degree days
- 5,321
- Cooling degree days
- 717
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −1°−18° (heating, 99%) and 90°32° (cooling, 1%).
Month by month
Grayson in January
Highs average 40°4° and lows 21°−6°, with 3.4 in85 mm of precipitation and 5 in13 cm of snow in a typical January.
- Record high
- 75°24° (2020)
- Record low
- −12°−24° (2014)
- Heating degree days
- 1069
- Cooling degree days
- 0
Grayson in February
Highs average 45°7° and lows 23°−5°, with 3.3 in84 mm of precipitation and 5 in13 cm of snow in a typical February.
- Record high
- 79°26° (2018)
- Record low
- −26°−32° (2015)
- Heating degree days
- 871
- Cooling degree days
- 0
Grayson in March
Highs average 54°12° and lows 29°−1°, with 4.9 in125 mm of precipitation and 3 in8 cm of snow in a typical March.
- Record high
- 86°30° (2012)
- Record low
- −12°−24° (2015)
- Heating degree days
- 728
- Cooling degree days
- 0
Grayson in April
Highs average 66°19° and lows 38°3°, with 4.4 in112 mm of precipitation and 0.3 in0.8 cm of snow in a typical April.
- Record high
- 88°31° (2009)
- Record low
- 19°−7° (2013)
- Heating degree days
- 387
- Cooling degree days
- 6
Grayson in May
Highs average 74°23° and lows 50°10°, with 4.9 in125 mm of precipitation in a typical May.
- Record high
- 89°32° (2007)
- Record low
- 25°−4° (2020)
- Heating degree days
- 148
- Cooling degree days
- 53
Grayson in June
Highs average 79°26° and lows 59°15°, with 5.1 in131 mm of precipitation in a typical June.
- Record high
- 100°38° (2012)
- Record low
- 40°4° (2020)
- Heating degree days
- 21
- Cooling degree days
- 141
Grayson in July
Highs average 82°28° and lows 63°17°, with 6.1 in154 mm of precipitation in a typical July.
- Record high
- 100°38° (2012)
- Record low
- 47°8° (2008)
- Heating degree days
- 4
- Cooling degree days
- 235
Grayson in August
Highs average 82°28° and lows 60°16°, with 4.1 in104 mm of precipitation in a typical August.
- Record high
- 100°38° (2007)
- Record low
- 43°6° (2025)
- Heating degree days
- 8
- Cooling degree days
- 194
Grayson in September
Highs average 76°24° and lows 54°12°, with 3.7 in93 mm of precipitation in a typical September.
- Record high
- 95°35° (2011)
- Record low
- 34°1° (2012)
- Heating degree days
- 88
- Cooling degree days
- 79
Grayson in OctoberThis month
Highs average 66°19° and lows 41°5°, with 3.1 in77 mm of precipitation in a typical October.
- Record high
- 90°32° (2019)
- Record low
- 21°−6° (2008)
- Heating degree days
- 380
- Cooling degree days
- 9
Grayson in November
Highs average 54°12° and lows 30°−1°, with 3 in75 mm of precipitation and 0.4 in1 cm of snow in a typical November.
- Record high
- 82°28° (2016)
- Record low
- 8°−13° (2000)
- Heating degree days
- 682
- Cooling degree days
- 0
Grayson in December
Highs average 44°7° and lows 26°−4°, with 4 in102 mm of precipitation and 4 in9 cm of snow in a typical December.
- Record high
- 73°23° (2007)
- Record low
- −4°−20° (2022)
- Heating degree days
- 935
- Cooling degree days
- 0