Louisville McAlpine, Kentucky climate: Climate normals at a NOAA weather station
Louisville McAlpine's normal year runs from 26°F January nights to 89°F July afternoons, with 48.0 inches of precipitation and 4 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 14.4°C, January lows of −3°C, July highs of 32°C, 1,219 mm of precipitation a year.
- NOAA stationLouisville McAlpine
- Station IDUSC00154955
- Location38.28°N 85.79°W
- Elevation440 ft (134 m)
On October 23, the normal high in Louisville McAlpine is 67°F and the normal low 47°F, and the chance of measurable rain or snow is 29%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Louisville McAlpine.
- Jan 43° 26°
- Feb 48° 29°
- Mar 57° 37°
- Apr 69° 47°
- May 77° 58°
- Jun 85° 66°
- Jul 89° 70°
- Aug 88° 69°
- Sep 82° 62°
- Oct 70° 50°
- Nov 57° 38°
- Dec 47° 31°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like at Louisville McAlpine each month?
July is the warmest month, with normal highs of 89°F; January the coldest, with normal lows of 26°F. The most precipitation falls in May (4.81 in), the least in August (3.27 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 43°F | 26°F | 34.6°F | 3.48 | 2.3 | 11 | <1 | 23 | 9 h 50 min |
| February | 48°F | 29°F | 38.4°F | 3.49 | 0.3 | 10 | <1 | 17 | 10 h 50 min |
| March | 57°F | 37°F | 46.6°F | 4.54 | 0.3 | 13 | <1 | 11 | 11 h 50 min |
| April | 69°F | 47°F | 58.1°F | 4.79 | 0.0 | 12 | <1 | 1 | 13 h 10 min |
| May | 77°F | 58°F | 67.6°F | 4.81 | 0.0 | 12 | 2 | <1 | 14 h 10 min |
| June | 85°F | 66°F | 75.6°F | 4.43 | 0.0 | 11 | 9 | <1 | 14 h 50 min |
| July | 89°F | 70°F | 79.3°F | 3.53 | 0.0 | 10 | 16 | <1 | 14 h 40 min |
| August | 88°F | 69°F | 78.4°F | 3.27 | 0.0 | 8 | 10 | <1 | 13 h 40 min |
| September | 82°F | 62°F | 71.6°F | 3.93 | 0.0 | 8 | 7 | <1 | 12 h 30 min |
| October | 70°F | 50°F | 60.0°F | 3.49 | 0.0 | 8 | 1 | <1 | 11 h 20 min |
| November | 57°F | 38°F | 47.4°F | 3.75 | 0.0 | 10 | <1 | 9 | 10 h 10 min |
| December | 47°F | 31°F | 38.9°F | 4.48 | 1.4 | 12 | <1 | 16 | 9 h 30 min |
| Year (annual) | 68°F | 49°F | 58.0°F | 47.99 | 4.3 | 124 | 46 | 77 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 6°C | −3°C | 1.4°C | 88 mm | 6 cm |
| February | 9°C | −2°C | 3.6°C | 89 mm | 1 cm |
| March | 14°C | 3°C | 8.1°C | 115 mm | 1 cm |
| April | 21°C | 8°C | 14.5°C | 122 mm | 0 cm |
| May | 25°C | 15°C | 19.8°C | 122 mm | 0 cm |
| June | 30°C | 19°C | 24.2°C | 113 mm | 0 cm |
| July | 32°C | 21°C | 26.3°C | 90 mm | 0 cm |
| August | 31°C | 20°C | 25.8°C | 83 mm | 0 cm |
| September | 28°C | 16°C | 22.0°C | 100 mm | 0 cm |
| October | 21°C | 10°C | 15.6°C | 89 mm | 0 cm |
| November | 14°C | 3°C | 8.6°C | 95 mm | 0 cm |
| December | 8°C | −1°C | 3.8°C | 114 mm | 4 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00154955; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
Which months are mildest at Louisville McAlpine?
Normal highs sit between 65°F and 85°F in April, May, September and October. Of those, September has the fewest days with rain (8).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00154955.
When is the last frost at Louisville McAlpine?
In Louisville McAlpine, the last spring frost (32°F) comes after March 31 in half of years and after April 14 in one year in ten; the first autumn frost comes before November 9 in half of years and before October 31 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- March 311 year in 10 after April 14; 9 in 10 after March 14
- First autumn frost, half of years before
- November 91 year in 10 before October 31; 9 in 10 before November 25
NOAA puts the median frost-free season at 225 days, and the season without a hard freeze (28°F) at 246 days.
A hard freeze (28°F) comes after March 18 in half of springs and before November 20 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Louisville McAlpine in zone 7a in ZIP code 40212, the nearest ZIP area.
Frost dates for every NOAA station in Kentucky · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00154955; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get at Louisville McAlpine?
In a normal year in Louisville McAlpine, 46 days a year reach 90°F (2 of them 100°F or more), 77 nights fall to 32°F or colder and 124 days bring measurable precipitation.
- Days at 90°F or more
- 46a normal year
- Days at 100°F or more
- 2a normal year
- Nights at 32°F or colder
- 77a normal year
- Days that stay below freezing
- 12high of 32°F or less
- Days with 0.01 inch of precipitation
- 124a normal year
- Days with 1 inch of snow or more
- 2a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00154955.
How sunny is it at Louisville McAlpine?
Over a year 73% of the sunlight that would reach the ground under clear skies gets through the clouds at Louisville McAlpine, 4.0 kWh per square metre a day. August is the sunniest month (81%) and December the cloudiest (61%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 61% | 1.9 |
| February | 62% | 2.6 |
| March | 66% | 3.7 |
| April | 72% | 5.0 |
| May | 72% | 5.5 |
| June | 80% | 6.3 |
| July | 79% | 6.0 |
| August | 81% | 5.5 |
| September | 79% | 4.6 |
| October | 74% | 3.3 |
| November | 70% | 2.3 |
| December | 61% | 1.7 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How many heating and cooling degree days does Louisville McAlpine record?
A normal year at Louisville McAlpine brings 4,141 heating degree days, 23% fewer than the median U.S. place (5,373), and 1,642 cooling degree days, 81% more than the median (908). Five months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 4,560 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 942 | 0 |
| February | 745 | 0 |
| March | 577 | 7 |
| April | 239 | 30 |
| May | 73 | 155 |
| June | 2 | 320 |
| July | 0 | 443 |
| August | 1 | 416 |
| September | 22 | 222 |
| October | 201 | 46 |
| November | 532 | 4 |
| December | 808 | 0 |
| Year (annual) | 4,141 | 1,642 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00154955. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
Have recent years at Louisville McAlpine been warmer than normal?
2025 averaged 58.5°F, 0.5°F above the 1991-2020 normal of 58.0°F. 4 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 58.6°F | +0.6°F | 51.49 | – |
| 2022 | 57.9°F | −0.1°F | 41.09 | – |
| 2023 | 59.8°F | +1.8°F | 42.29 | – |
| 2024 | 60.7°F | +2.7°F | 52.74 | – |
| 2025 | 58.5°F | +0.5°F | 45.32 | – |
Source: observed years: ACIS, station USC00154955. A year counts only with all twelve months complete.
How does Louisville McAlpine's climate compare?
Louisville McAlpine is warmer than 56 of the 68 places with their own NOAA record in Kentucky, and wetter than 14. Across the 7,247 U.S. stations with normals, its annual mean of 58.0°F is warmer than 69%.
In the Köppen classification computed from these normals, Louisville McAlpine is Cfa: temperate, no dry season, hot summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Which places near Louisville McAlpine share this climate record?
18 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Jeffersonville, INalso near: Louisville Bowman Field (7 mi, 57.8°F a year); Louisville (11 mi, 58.9°F a year)52,912 people · 6 mi NE
- New Albany, IN37,652 people · 3 mi NW
- Clarksville, IN22,041 people · 3 mi NE
- Sellersburg, IN10,057 people · 8 mi N
- Charlestown, IN8,559 people · 12 mi NE
- Floyds Knobs, IN4,557 people · 6 mi NW
- Georgetown, IN3,837 people · 9 mi W
- Henryville, IN1,804 people · 18 mi N
- Galena, IN1,618 people · 10 mi NW
- Greenville, IN1,448 people · 12 mi NW
- Lanesville, IN939 people · 11 mi W
- Memphis, IN928 people · 15 mi N
- Palmyra, IN905 people · 19 mi NW
- Borden, IN816 people · 16 mi NW
- New Salisbury, IN518 people · 17 mi W
- Ramsey, IN478 people · 20 mi W
- Martinsburg, IN150 people · 17 mi NW
- Crandall, IN138 people · 15 mi W
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Louisville McAlpine's climate
What is the coldest month at Louisville McAlpine?
January, with a normal high of 43°F and a normal low of 26°F. The warmest is July (89°F by day, 70°F at night).
Does it snow at Louisville McAlpine?
Yes: 4 inches in a normal year, falling on 3 days with 0.1 inch or more, the most in January (2.3 inches).
What is the rainiest month at Louisville McAlpine?
May, with 4.81 in of precipitation in a normal year; the driest is August with 3.27 in.
What plant hardiness zone is Louisville McAlpine in?
The USDA's 2023 map puts Louisville McAlpine in zone 7a in ZIP code 40212, the nearest ZIP area.
How late can frost come at Louisville McAlpine?
In half of years the last 32°F night comes after March 31; in one year in ten it comes after April 14. Waiting until April 14 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Kentucky climateThe statewide normals and every place in the state
- Louisville, KY7 miles from this station, 58.9°F a year
- Louisville Bowman Field, KY7 miles from this station, 57.8°F a year
- Crestwood, KY21 miles from this station, 55.2°F a year
- Bernheim Forest, KY26 miles from this station, 57.2°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made