Climate and Average Weather Year Round in Alexandria Louisiana, United StatesIn Alexandria, the summers are long, hot, and oppressive; the winters are short and cold; and it is wet and partly cloudy year round. Over the course of the year, the temperature typically varies from 41°F to 92°F and is rarely below 27°F or above 98°F. Based on the tourism score, the best times of year to visit Alexandria for warm-weather activities are from early April to late May and from mid September to late October. Average Temperature in AlexandriaThe hot season lasts for 4.1 months, from May 21 to September 23, with an average daily high temperature above 86°F. The hottest month of the year in Alexandria is July, with an average high of 92°F and low of 73°F. The cool season lasts for 2.8 months, from November 28 to February 22, with an average daily high temperature below 66°F. The coldest month of the year in Alexandria is January, with an average low of 41°F and high of 60°F.
The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day. Mezzouna, Tunisia (5,648 miles away); Al Quwayrah, Jordan (7,006 miles); and Adana, Turkey (6,643 miles) are the far-away foreign places with temperatures most similar to Alexandria (view comparison). CloudsIn Alexandria, the average percentage of the sky covered by clouds experiences mild seasonal variation over the course of the year. The clearer part of the year in Alexandria begins around September 10 and lasts for 2.4 months, ending around November 23. The clearest month of the year in Alexandria is October, during which on average the sky is clear, mostly clear, or partly cloudy 68% of the time. The cloudier part of the year begins around November 23 and lasts for 9.6 months, ending around September 10. The cloudiest month of the year in Alexandria is February, during which on average the sky is overcast or mostly cloudy 48% of the time.
PrecipitationA wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Alexandria varies throughout the year. The wetter season lasts 3.1 months, from May 19 to August 22, with a greater than 34% chance of a given day being a wet day. The month with the most wet days in Alexandria is June, with an average of 12.6 days with at least 0.04 inches of precipitation. The drier season lasts 8.9 months, from August 22 to May 19. The month with the fewest wet days in Alexandria is October, with an average of 7.7 days with at least 0.04 inches of precipitation. Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. The month with the most days of rain alone in Alexandria is June, with an average of 12.6 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 44% on June 19.
RainfallTo 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. Alexandria experiences significant seasonal variation in monthly rainfall. Rain falls throughout the year in Alexandria. The month with the most rain in Alexandria is December, with an average rainfall of 5.2 inches. The month with the least rain in Alexandria is August, with an average rainfall of 3.1 inches.
SunThe length of the day in Alexandria varies significantly over the course of the year. In 2024, the shortest day is December 21, with 10 hours, 7 minutes of daylight; the longest day is June 20, with 14 hours, 11 minutes of daylight.
The earliest sunrise is at 6:04 AM on June 10, and the latest sunrise is 1 hour, 22 minutes later at 7:26 AM on November 2. The earliest sunset is at 5:06 PM on December 2, and the latest sunset is 3 hours, 12 minutes later at 8:18 PM on June 30. Daylight saving time (DST) is observed in Alexandria during 2024, starting in the spring on March 10, lasting 7.8 months, and ending in the fall on November 3. The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation. MoonThe figure below presents a compact representation of key lunar data for 2024. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. HumidityWe base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night. Alexandria experiences extreme seasonal variation in the perceived humidity. The muggier period of the year lasts for 5.8 months, from April 22 to October 17, during which time the comfort level is muggy, oppressive, or miserable at least 26% of the time. The month with the most muggy days in Alexandria is July, with 29.8 days that are muggy or worse. The month with the fewest muggy days in Alexandria is January, with 0.7 days that are muggy or worse.
WindThis section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages. The average hourly wind speed in Alexandria experiences mild seasonal variation over the course of the year. The windier part of the year lasts for 7.3 months, from October 13 to May 21, with average wind speeds of more than 5.0 miles per hour. The windiest month of the year in Alexandria is March, with an average hourly wind speed of 6.1 miles per hour. The calmer time of year lasts for 4.7 months, from May 21 to October 13. The calmest month of the year in Alexandria is July, with an average hourly wind speed of 4.0 miles per hour.
The predominant average hourly wind direction in Alexandria varies throughout the year. The wind is most often from the south for 7.2 months, from February 17 to September 23 and for 2.0 months, from October 11 to December 12, with a peak percentage of 59% on June 3. The wind is most often from the north for 2.6 weeks, from September 23 to October 11 and for 2.2 months, from December 12 to February 17, with a peak percentage of 34% on October 4. Best Time of Year to VisitTo characterize how pleasant the weather is in Alexandria 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 Alexandria for general outdoor tourist activities are from early April to late May and from mid September to late October, with a peak score in the first week of May. Tourism Score in AlexandriaThe 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 Alexandria for hot-weather activities is from mid May to late September, with a peak score in the first week of June. Beach/Pool Score in AlexandriaMethodologyFor each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed. Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies. Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more. Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter. Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter. Growing SeasonDefinitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere). The growing season in Alexandria typically lasts for 8.9 months (271 days), from around February 25 to around November 23, rarely starting before January 30 or after March 20, and rarely ending before November 2 or after December 15. Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F. Based on growing degree days alone, the first spring blooms in Alexandria should appear around January 21, only rarely appearing before January 13 or after February 6. Solar EnergyThis section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation. 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 4 to August 15, with an average daily incident shortwave energy per square meter above 5.9 kWh. The brightest month of the year in Alexandria is May, with an average of 6.5 kWh. The darker period of the year lasts for 2.6 months, from November 15 to February 2, with an average daily incident shortwave energy per square meter below 3.6 kWh. The darkest month of the year in Alexandria is December, with an average of 2.9 kWh.
TopographyFor the purposes of this report, the geographical coordinates of Alexandria are 31.311 deg latitude, -92.445 deg longitude, and 72 ft elevation. The topography within 2 miles of Alexandria is essentially flat, with a maximum elevation change of 79 feet and an average elevation above sea level of 80 feet. Within 10 miles is essentially flat (171 feet). Within 50 miles also contains only modest variations in elevation (469 feet). The area within 2 miles of Alexandria is covered by artificial surfaces (78%), within 10 miles by herbaceous vegetation (38%) and cropland (32%), and within 50 miles by trees (42%) and herbaceous vegetation (29%). Data SourcesThis report illustrates the typical weather in Alexandria, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016. Temperature and Dew PointThere are 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Alexandria. For each station, the records are corrected for the elevation difference between that station and Alexandria 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 Alexandria is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Alexandria and a given station. The stations contributing to this reconstruction are:
To get a sense of how much these sources agree with each other, you can view a comparison of Alexandria and the stations that contribute to our estimates of its temperature history and climate. Please note that each source's contribution is adjusted for elevation and the relative change present in the MERRA-2 data. Other DataAll data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , by Jean Meeus. All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid. Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations. Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory. Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database . Time zones for airports and weather stations are provided by AskGeo.com . Maps are © OpenStreetMap contributors. DisclaimerThe information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site. We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands. We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader. Please review our full terms contained on our Terms of Service page. |