Average Weather in Louisa Kentucky, United States
In Louisa, the summers are long, warm, and muggy; the winters are short, very cold, and wet; and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 29°F to 86°F and is rarely below 13°F or above 92°F.
Based on the tourism score, the best times of year to visit Louisa for warm-weather activities are from mid to late June and from late July to late September.
The hot season lasts for 3.9 months, from May 23 to September 20, with an average daily high temperature above 77°F. The hottest day of the year is July 21, with an average high of 86°F and low of 68°F.
The cold season lasts for 2.9 months, from December 2 to February 28, with an average daily high temperature below 52°F. The coldest day of the year is January 29, with an average low of 29°F and high of 44°F.
Average High and Low Temperature
Average Hourly Temperature
Borgoricco-San Michele delle Badesse-Sant'Eufemia, Italy (4,608 miles away) is the far-away foreign place with temperatures most similar to Louisa (view comparison).
In Louisa, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.
The clearer part of the year in Louisa begins around June 13 and lasts for 5.0 months, ending around November 11. On August 27, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 68% of the time, and overcast or mostly cloudy 32% of the time.
The cloudier part of the year begins around November 11 and lasts for 7.0 months, ending around June 13. On January 2, the cloudiest day of the year, the sky is overcast or mostly cloudy 63% of the time, and clear, mostly clear, or partly cloudy 37% of the time.
Cloud Cover Categories
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Louisa varies throughout the year.
The wetter season lasts 5.1 months, from March 17 to August 19, with a greater than 33% chance of a given day being a wet day. The chance of a wet day peaks at 43% on July 14.
The drier season lasts 6.9 months, from August 19 to March 17. The smallest chance of a wet day is 23% on October 20.
Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 43% on July 14.
Daily Chance of Precipitation
To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Louisa experiences some seasonal variation in monthly rainfall.
Rain falls throughout the year in Louisa. The most rain falls during the 31 days centered around May 18, with an average total accumulation of 3.8 inches.
The least rain falls around January 16, with an average total accumulation of 2.2 inches.
Average Monthly Rainfall
We report snowfall in liquid-equivalent terms. The actual depth of new snowfall is typically between 5 and 10 times the liquid-equivalent amount, assuming the ground is frozen. Colder, drier snow tends to be on the higher end of that range and warmer, wetter snow on the lower end.
As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. Louisa experiences some seasonal variation in monthly liquid-equivalent snowfall.
The snowy period of the year lasts for 3.0 months, from December 14 to March 14, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around January 28, with an average total liquid-equivalent accumulation of 0.3 inches.
The snowless period of the year lasts for 9.0 months, from March 14 to December 14. The least snow falls around July 25, with an average total liquid-equivalent accumulation of 0.0 inches.
Average Liquid-Equivalent Monthly Snowfall
The length of the day in Louisa varies significantly over the course of the year. In 2018, the shortest day is December 21, with 9 hours, 31 minutes of daylight; the longest day is June 21, with 14 hours, 49 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 6:06 AM on June 14, and the latest sunrise is 1 hour, 52 minutes later at 7:58 AM on November 3. The earliest sunset is at 5:10 PM on December 6, and the latest sunset is 3 hours, 47 minutes later at 8:57 PM on June 27.
Daylight saving time (DST) is observed in Louisa during 2018, starting in the spring on March 11, lasting 7.8 months, and ending in the fall on November 4.
Sunrise & Sunset with Twilight and Daylight Saving Time
Louisa experiences extreme seasonal variation in the perceived humidity.
The muggier period of the year lasts for 4.0 months, from May 23 to September 23, during which time the comfort level is muggy, oppressive, or miserable at least 18% of the time. The muggiest day of the year is July 27, with muggy conditions 72% of the time.
The least muggy day of the year is February 13, when muggy conditions are essentially unheard of.
Humidity Comfort Levels
The average hourly wind speed in Louisa experiences mild seasonal variation over the course of the year.
The windier part of the year lasts for 5.7 months, from November 11 to May 1, with average wind speeds of more than 4.2 miles per hour. The windiest day of the year is February 25, with an average hourly wind speed of 5.5 miles per hour.
The calmer time of year lasts for 6.3 months, from May 1 to November 11. The calmest day of the year is August 1, with an average hourly wind speed of 2.9 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Louisa varies throughout the year.
The wind is most often from the south for 1.2 months, from May 9 to June 14 and for 3.5 months, from August 24 to December 10, with a peak percentage of 40% on November 20. The wind is most often from the west for 2.3 months, from June 14 to August 24 and for 5.0 months, from December 10 to May 9, with a peak percentage of 42% on July 13.
Best Time of Year to Visit
To characterize how pleasant the weather is in Louisa throughout the year, we compute two travel scores.
The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best times of year to visit Louisa for general outdoor tourist activities are from mid to late June and from late July to late September, with a peak score in the first week of September.
The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit Louisa for hot-weather activities is from late June to early September, with a peak score in the last week of July.
The growing season in Louisa typically lasts for 6.8 months (207 days), from around April 6 to around October 30, rarely starting before March 18 or after April 24, and rarely ending before October 12 or after November 19.
Time Spent in Various Temperature Bands and the Growing Season
Based on growing degree days alone, the first spring blooms in Louisa should appear around March 6, only rarely appearing before February 13 or after March 24.
Growing Degree Days
The average daily incident shortwave solar energy experiences significant seasonal variation over the course of the year.
The brighter period of the year lasts for 4.3 months, from April 27 to September 4, with an average daily incident shortwave energy per square meter above 5.7 kWh. The brightest day of the year is July 2, with an average of 6.7 kWh.
The darker period of the year lasts for 3.1 months, from November 9 to February 11, with an average daily incident shortwave energy per square meter below 2.9 kWh. The darkest day of the year is December 25, with an average of 1.9 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Louisa are 38.114 deg latitude, -82.603 deg longitude, and 696 ft elevation.
The topography within 2 miles of Louisa contains only modest variations in elevation, with a maximum elevation change of 440 feet and an average elevation above sea level of 662 feet. Within 10 miles contains only modest variations in elevation (738 feet). Within 50 miles contains significant variations in elevation (2,034 feet).
The area within 2 miles of Louisa is covered by trees (60%) and artificial surfaces (31%), within 10 miles by trees (95%), and within 50 miles by trees (91%).
This report illustrates the typical weather in Louisa, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.
Temperature and Dew Point
There are 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Louisa.
For each station, the records are corrected for the elevation difference between that station and Louisa according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.
The estimated value at Louisa is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Louisa and a given station.
Time zones for aiports and weather stations are provided by AskGeo.com .