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Summer Weather in Saint Rose Louisiana, United States

Daily high temperatures are around 89°F, rarely falling below 82°F or exceeding 94°F. The highest daily average high temperature is 90°F on August 10.

Daily low temperatures are around 74°F, rarely falling below 66°F or exceeding 79°F. The highest daily average low temperature is 76°F on August 4.

For reference, on July 22, the hottest day of the year, temperatures in Saint Rose typically range from 76°F to 90°F, while on January 17, the coldest day of the year, they range from 46°F to 62°F.

Average High and Low Temperature in the Summer in Saint Rose

Average High and Low Temperature in the Summer in Saint RoseJunJulAug55°F55°F60°F60°F65°F65°F70°F70°F75°F75°F80°F80°F85°F85°F90°F90°F95°F95°F100°F100°FSpringFallJul 2290°FJul 2290°F76°F76°FJun 187°FJun 187°F72°F72°FAug 3189°FAug 3189°F75°F75°FJul 189°FJul 189°F75°F75°F
The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

The figure below shows you a compact characterization of the hourly average summer temperatures. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Average Hourly Temperature in the Summer in Saint Rose

Average Hourly Temperature in the Summer in Saint RoseJunJulAug12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMSpringFallcomfortablecomfortablewarmhotcomfortablecomfortable
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Longmen, China (8,211 miles away) is the far-away foreign place with temperatures most similar to Saint Rose (view comparison).

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© OpenStreetMap contributors

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The summer in Saint Rose experiences gradually increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 41% to 48%. The highest chance of overcast or mostly cloudy conditions is 59% on July 29.

The clearest day of the summer is June 2, with clear, mostly clear, or partly cloudy conditions 60% of the time.

For reference, on July 29, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 59%, while on October 25, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 67%.

Cloud Cover Categories in the Summer in Saint Rose

Cloud Cover Categories in the Summer in Saint RoseJunJulAug0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%SpringFallOct 2567%Oct 2567%Jun 159%Jun 159%Aug 3152%Aug 3152%Jul 147%Jul 147%Aug 142%Aug 142%clearmostly clearpartly cloudymostly cloudyovercast
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Saint Rose, the chance of a wet day over the course of the summer is increasing, starting the season at 41% and ending it at 47%.

For reference, the year's highest daily chance of a wet day is 60% on July 28, and its lowest chance is 22% on October 29.

Probability of Precipitation in the Summer in Saint Rose

Probability of Precipitation in the Summer in Saint RoseJunJulAug0%0%10%10%20%20%30%30%40%40%50%50%60%60%SpringFallJul 2860%Jul 2860%Jun 141%Jun 141%Aug 3147%Aug 3147%Jul 157%Jul 157%rain
The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).

Rainfall

To show variation within the season and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during the summer in Saint Rose is gradually increasing, starting the season at 4.9 inches, when it rarely exceeds 8.5 inches or falls below 1.6 inches, and ending the season at 5.3 inches, when it rarely exceeds 10.5 inches or falls below 2.3 inches.

The highest average 31-day accumulation is 5.7 inches on June 27.

Average Monthly Rainfall in the Summer in Saint Rose

Average Monthly Rainfall in the Summer in Saint RoseJunJulAug0 in0 in2 in2 in4 in4 in6 in6 in8 in8 in10 in10 inSpringFallJun 265.7 inJun 265.7 inJun 14.9 inJun 14.9 inAug 315.3 inAug 315.3 inAug 15.1 inAug 15.1 in
The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average snowfall.

Over the course of the summer in Saint Rose, the length of the day is rapidly decreasing. From the start to the end of the season, the length of the day decreases by 1 hour, 11 minutes, implying an average daily decrease of 47 seconds, and weekly decrease of 5 minutes, 29 seconds.

The shortest day of the summer is August 31, with 12 hours, 46 minutes of daylight and the longest day is June 20, with 14 hours, 5 minutes of daylight.

Hours of Daylight and Twilight in the Summer in Saint Rose

Hours of Daylight and Twilight in the Summer in Saint RoseJunJulAug0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrSpringFallJun 2014 hr, 5 minJun 2014 hr, 5 minnightnightdaydayAug 3112 hr, 46 minAug 3112 hr, 46 minAug 113 hr, 33 minAug 113 hr, 33 min
The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The earliest sunrise of the summer in Saint Rose is 5:59 AM on June 10 and the latest sunrise is 38 minutes later at 6:38 AM on August 31.

The latest sunset is 8:06 PM on June 30 and the earliest sunset is 42 minutes earlier at 7:24 PM on August 31.

Daylight saving time is observed in Saint Rose during 2024, but it neither starts nor ends during the summer, so the entire season is in standard time.

For reference, on June 20, the longest day of the year, the Sun rises at 6:00 AM and sets 14 hours, 5 minutes later, at 8:05 PM, while on December 21, the shortest day of the year, it rises at 6:53 AM and sets 10 hours, 13 minutes later, at 5:06 PM.

Sunrise & Sunset with Twilight in the Summer in Saint Rose

Sunrise & Sunset with Twilight in the Summer in Saint RoseJunJulAug2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMSpringFall5:59 AM5:59 AMJun 108:02 PMJun 108:02 PM6:03 AM6:03 AMJun 308:06 PMJun 308:06 PM6:38 AM6:38 AMAug 317:24 PMAug 317:24 PM6:20 AM6:20 AMAug 17:54 PMAug 17:54 PMSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day in the summer. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray.

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.

Solar Elevation and Azimuth in the Summer in Saint Rose

Solar Elevation and Azimuth in the Summer in Saint RoseJunJulAug12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMSpringFall001020203030405050606070800010102030304040506060707080
northeastsouthwest
Solar elevation and azimuth in the the summer of 2024. The black lines are lines of constant solar elevation (the angle of the sun above the horizon, in degrees). The background color fills indicate the azimuth (the compass bearing) of the sun. The lightly tinted areas at the boundaries of the cardinal compass points indicate the implied intermediate directions (northeast, southeast, southwest, and northwest).

The figure below presents a compact representation of key lunar data for the summer of 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. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.

Moon Rise, Set & Phases in the Summer in Saint Rose

Moon Rise, Set & Phases in the Summer in Saint RoseJunJulAug12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMSpringFallMay 710:23 PMMay 710:23 PMMay 238:54 AMMay 238:54 AMJun 67:38 AMJun 67:38 AMJun 218:09 PMJun 218:09 PMJul 55:58 PMJul 55:58 PMJul 215:18 AMJul 215:18 AMAug 46:14 AMAug 46:14 AMAug 191:26 PMAug 191:26 PMSep 28:56 PMSep 28:56 PMSep 179:35 PMSep 179:35 PM5:39 AM5:39 AM7:34 PM7:34 PM7:22 PM7:22 PM5:48 AM5:48 AM5:45 AM5:45 AM8:40 PM8:40 PM8:16 PM8:16 PM6:15 AM6:15 AM8:23 PM8:23 PM7:55 PM7:55 PM6:12 AM6:12 AM6:21 AM6:21 AM8:23 PM8:23 PM7:56 PM7:56 PM7:22 AM7:22 AM7:24 PM7:24 PM6:59 PM6:59 PM7:17 AM7:17 AM
The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.

We 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.

The chance that a given day will be muggy in Saint Rose is increasing during the summer, rising from 85% to 94% over the course of the season.

The highest chance of a muggy day during the summer is 99% on July 22.

For reference, on July 21, the muggiest day of the year, there are muggy conditions 99% of the time, while on January 23, the least muggy day of the year, there are muggy conditions 6% of the time.

Humidity Comfort Levels in the Summer in Saint Rose

Humidity Comfort Levels in the Summer in Saint RoseJunJulAug0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%SpringFallJul 2299%Jul 2299%Jun 185%Jun 185%Aug 3194%Aug 3194%Jul 198%Jul 198%miserablemiserableoppressiveoppressivemuggymuggydrydryhumidhumidcomfortablecomfortable
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.

This 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 Saint Rose is gradually decreasing during the summer, decreasing from 8.1 miles per hour to 7.2 miles per hour over the course of the season.

For reference, on March 6, the windiest day of the year, the daily average wind speed is 10.4 miles per hour, while on August 7, the calmest day of the year, the daily average wind speed is 6.5 miles per hour.

The lowest daily average wind speed during the summer is 6.5 miles per hour on August 7.

Average Wind Speed in the Summer in Saint Rose

Average Wind Speed in the Summer in Saint RoseJunJulAug0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mphSpringFallAug 76.5 mphAug 76.5 mphJun 18.1 mphJun 18.1 mphAug 317.2 mphAug 317.2 mphJul 17.0 mphJul 17.0 mph
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The wind direction in Saint Rose during the summer is predominantly out of the south from June 1 to July 14 and from August 15 to August 20, the west from July 14 to August 15, and the east from August 20 to August 31.

Wind Direction in the Summer in Saint Rose

Wind Direction in the Summer in Saint RoseSWSEJunJulAug0%100%20%80%40%60%60%40%80%20%100%0%SpringFallwestsoutheastnorth
northeastsouthwest
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than 1.0 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Saint Rose is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.

The average surface water temperature in Saint Rose is gradually increasing during the summer, rising by 3°F, from 81°F to 85°F, over the course of the season.

The highest average surface water temperature during the summer is 86°F on August 10.

Average Water Temperature in the Summer in Saint Rose

Average Water Temperature in the Summer in Saint RoseJunJulAug70°F70°F72°F72°F74°F74°F76°F76°F78°F78°F80°F80°F82°F82°F84°F84°F86°F86°F88°F88°F90°F90°FSpringFallAug 1086°FAug 1086°FJun 181°FJun 181°FAug 3185°FAug 3185°FJul 185°FJul 185°F
The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

Definitions 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 Saint Rose typically lasts for 11 months (329 days), from around January 30 to around December 24, rarely starting after February 29, or ending before December 1.

The summer in Saint Rose is reliably fully within the growing season.

Time Spent in Various Temperature Bands and the Growing Season in the Summer in Saint Rose

Time Spent in Various Temperature Bands and the Growing Season in the Summer in Saint Rosegrowing seasongrowing seasonJunJulAug0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%SpringFall100%Jul 17100%Jul 17comfortablewarmhotcool
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The percentage of time spent in various temperature bands. The black line is the percentage chance that a given day is within the growing season.

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.

The average accumulated growing degree days in Saint Rose are very rapidly increasing during the summer, increasing by 2,792°F, from 2,237°F to 5,029°F, over the course of the season.

Growing Degree Days in the Summer in Saint Rose

Growing Degree Days in the Summer in Saint RoseJunJulAug2,000°F2,000°F2,500°F2,500°F3,000°F3,000°F3,500°F3,500°F4,000°F4,000°F4,500°F4,500°F5,000°F5,000°FSpringFallJun 12,237°FJun 12,237°FAug 315,029°FAug 315,029°FJul 13,137°FJul 13,137°FAug 14,100°FAug 14,100°F
The average growing degree days accumulated over the course of the summer, with 25th to 75th and 10th to 90th percentile bands.

This 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 in Saint Rose is decreasing during the summer, falling by 1.3 kWh, from 6.4 kWh to 5.1 kWh, over the course of the season.

Average Daily Incident Shortwave Solar Energy in the Summer in Saint Rose

Average Daily Incident Shortwave Solar Energy in the Summer in Saint RoseJunJulAug0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWhSpringFallJun 16.4 kWhJun 16.4 kWhAug 315.1 kWhAug 315.1 kWhJul 15.6 kWhJul 15.6 kWhAug 15.3 kWhAug 15.3 kWh
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

For the purposes of this report, the geographical coordinates of Saint Rose are 29.947 deg latitude, -90.323 deg longitude, and 10 ft elevation.

The topography within 2 miles of Saint Rose is essentially flat, with a maximum elevation change of 16 feet and an average elevation above sea level of 5 feet. Within 10 miles is essentially flat (413 feet). Within 50 miles contains only modest variations in elevation (827 feet).

The area within 2 miles of Saint Rose is covered by herbaceous vegetation (53%), artificial surfaces (29%), and water (14%), within 10 miles by herbaceous vegetation (62%) and artificial surfaces (18%), and within 50 miles by herbaceous vegetation (58%) and water (24%).

This report illustrates the typical weather in Saint Rose, 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 4 weather stations near enough to contribute to our estimation of the temperature and dew point in Saint Rose.

For each station, the records are corrected for the elevation difference between that station and Saint Rose 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 Saint Rose is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Saint Rose and a given station.

The stations contributing to this reconstruction are:

Sources mapKMSY, 88%4 mi, -7 ftKHUM, 4%33 mi, -3 ftKGAO, 4%35 mi, -10 ftKREG, 3%40 mi, 3 ft© OpenStreetMap contributors

To get a sense of how much these sources agree with each other, you can view a comparison of Saint Rose 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 Data

All 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.

Disclaimer

The 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.

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