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Little Rock has a humid subtropical climate (Köppen Cfa), with hot, usually humid summers, but subject to drought, primarily in late summer. According to the Trewartha climate classification system, Little Rock is subtropical because nine of its months exceed 50 °F (10 °C) in average temperature. Summers are usually hot, occasionally extremely hot; winters are short and cool, but with marked temperature variations, as the area is subject to alternating incursions of warm, moist air from the Gulf of Mexico (possibly producing daily high temperatures in the 70s °F.) and cold, dry air from Canada (possibly producing daily high temperatures below freezing, 32 °F, even in the 20s °F.).
All of Arkansas falls within the humid subtropical Köppen climate classification.
The Little Rock area has nearly 50 inches (1,300 mm) of precipitation per year, on average. Little Rock experiences a prolonged spring wet season, with heavy rainfall a distinct possibility from March to May, and a secondary wet season peaking in November and December. On average, August is the driest month, and July through September is the driest period of the year. Little Rock averages more rain than the national average, but also averages more sunny days than the national average.
Thunderstorms can occur any month of the year, but are especially frequent and severe in spring, when torrential rainfall, damaging thunderstorm winds, hail, and tornadoes are all significant threats; a secondary severe weather season peaks in November. Snow, sleet and freezing rain can occur during the winter season, when cold Canadian air at ground level is overrun by warm, moist air from the Gulf of Mexico. Unless otherwise indicated, all normal data presented below are based on data at Bill and Hillary Clinton National Airport the official Little Rock climatology station, from the 1981−2010 normals period.
With an annual mean minimum temperature of 13.6 °F (−10 °C), Little Rock is in USDA plant hardiness zone 8a, allowing the cultivation of some subtropical species such as Crape Myrtle and some cold hardy palms.
^Mean monthly maxima and minima (i.e. the expected highest and lowest temperature readings at any point during the year or given month) calculated based on data at said location from 1991 to 2020.
^Official records for Little Rock began on 1 July 1879 at the State Capitol and maintained there until 30 April 1942. The next day, and until 7 August 1942, temperature and precipitation were recorded separately at two different locations in and around Little Rock, and the official climatology station has been Adams Field since 8 August 1942. For more information, see Threadex
^"Historical UV Index Data - Little Rock, AR". UV Index Today. Retrieved April 20, 2023.
External linksEdit
September 01, 2023
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This article s lead section may be too long for the length of the article Please help by moving some material from it into the body of the article Please read the layout guide and lead section guidelines to ensure the section will still be inclusive of all essential details Please discuss this issue on the article s talk page November 2020 Little Rock has a humid subtropical climate Koppen Cfa with hot usually humid summers but subject to drought primarily in late summer According to the Trewartha climate classification system Little Rock is subtropical because nine of its months exceed 50 F 10 C in average temperature Summers are usually hot occasionally extremely hot winters are short and cool but with marked temperature variations as the area is subject to alternating incursions of warm moist air from the Gulf of Mexico possibly producing daily high temperatures in the 70s F and cold dry air from Canada possibly producing daily high temperatures below freezing 32 F even in the 20s F All of Arkansas falls within the humid subtropical Koppen climate classification The Little Rock area has nearly 50 inches 1 300 mm of precipitation per year on average Little Rock experiences a prolonged spring wet season with heavy rainfall a distinct possibility from March to May and a secondary wet season peaking in November and December On average August is the driest month and July through September is the driest period of the year Little Rock averages more rain than the national average but also averages more sunny days than the national average Thunderstorms can occur any month of the year but are especially frequent and severe in spring when torrential rainfall damaging thunderstorm winds hail and tornadoes are all significant threats a secondary severe weather season peaks in November Snow sleet and freezing rain can occur during the winter season when cold Canadian air at ground level is overrun by warm moist air from the Gulf of Mexico Unless otherwise indicated all normal data presented below are based on data at Bill and Hillary Clinton National Airport the official Little Rock climatology station from the 1981 2010 normals period Contents 1 General climatology 1 1 Temperature 1 2 Other data 2 See also 3 Notes 4 References 5 External linksGeneral climatology EditWith an annual mean minimum temperature of 13 6 F 10 C Little Rock is in USDA plant hardiness zone 8a allowing the cultivation of some subtropical species such as Crape Myrtle and some cold hardy palms Temperature Edit Climate data for Little Rock Clinton National Airport 1991 2020 normals a extremes 1879 present b Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec YearRecord high F C 83 28 87 31 91 33 95 35 98 37 107 42 112 44 114 46 106 41 98 37 86 30 81 27 114 46 Mean maximum F C 72 0 22 2 75 8 24 3 82 2 27 9 86 2 30 1 91 3 32 9 96 2 35 7 100 2 37 9 101 1 38 4 96 2 35 7 89 2 31 8 79 6 26 4 72 8 22 7 102 4 39 1 Average high F C 50 5 10 3 55 2 12 9 63 7 17 6 72 8 22 7 80 5 26 9 88 2 31 2 91 7 33 2 91 5 33 1 85 1 29 5 74 2 23 4 61 9 16 6 52 6 11 4 72 3 22 4 Daily mean F C 40 7 4 8 44 7 7 1 52 7 11 5 61 4 16 3 69 9 21 1 78 0 25 6 81 4 27 4 80 8 27 1 74 0 23 3 62 6 17 0 51 1 10 6 43 0 6 1 61 7 16 5 Average low F C 30 9 0 6 34 2 1 2 41 8 5 4 50 1 10 1 59 3 15 2 67 7 19 8 71 2 21 8 70 1 21 2 62 9 17 2 50 9 10 5 40 2 4 6 33 3 0 7 51 0 10 6 Mean minimum F C 16 4 8 7 20 5 6 4 26 6 3 0 36 9 2 7 47 2 8 4 59 8 15 4 65 6 18 7 63 8 17 7 50 4 10 2 37 1 2 8 26 4 3 1 20 3 6 5 13 6 10 2 Record low F C 8 22 12 24 11 12 28 2 38 3 46 8 54 12 52 11 37 3 27 3 10 12 1 18 12 24 Average precipitation inches mm 3 50 89 3 97 101 4 96 126 5 59 142 5 08 129 3 55 90 3 33 85 3 16 80 3 01 76 4 47 114 4 72 120 5 08 129 50 42 1 281 Average snowfall inches cm 1 1 2 8 1 6 4 1 0 5 1 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6 1 5 3 8 9 7 Average precipitation days 0 01 in 9 2 9 3 10 5 9 4 10 9 8 0 8 7 7 2 6 6 8 1 8 5 9 5 105 9Average snowy days 0 1 in 0 5 0 9 0 4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 3 2 2Average relative humidity 70 2 68 3 65 4 66 7 71 1 70 0 71 6 71 7 73 5 70 4 71 0 70 9 70 1Average dew point F C 28 9 1 7 32 4 0 2 40 3 4 6 49 6 9 8 59 2 15 1 66 2 19 0 70 2 21 2 68 5 20 3 63 1 17 3 51 1 10 6 41 7 5 4 32 7 0 4 50 3 10 2 Mean monthly sunshine hours 180 9 188 2 244 5 276 7 325 3 346 2 351 0 323 0 271 9 251 0 176 9 166 2 3 101 8Percent possible sunshine 58 62 66 71 75 80 80 78 73 72 57 54 70Average ultraviolet index 2 5 3 8 5 7 7 6 8 9 9 6 9 8 8 9 7 2 4 9 3 0 2 3 6 1Source 1 NOAA relative humidity and dew point 1961 1990 sun 1961 1990 at North Little Rock Airport 1 2 3 4 5 Source 2 UV Index Today 1995 to 2022 6 Other data Edit Meteorological Data for the Little Rock Greater Metropolitan Area nbsp Wind speeds during the various months nbsp Temperature averages for each month See also Edit nbsp United States portalNotes Edit Mean monthly maxima and minima i e the expected highest and lowest temperature readings at any point during the year or given month calculated based on data at said location from 1991 to 2020 Official records for Little Rock began on 1 July 1879 at the State Capitol and maintained there until 30 April 1942 The next day and until 7 August 1942 temperature and precipitation were recorded separately at two different locations in and around Little Rock and the official climatology station has been Adams Field since 8 August 1942 For more information see ThreadexReferences Edit NowData NOAA Online Weather Data National Oceanic and Atmospheric Administration Retrieved June 18 2021 Station Little Rock AP Adams FLD AR U S Climate Normals 2020 U S Monthly Climate Normals 1991 2020 National Oceanic and Atmospheric Administration Retrieved June 18 2021 Climatological Averages Statistics and Records for Little Rock Arkansas PDF National Weather Service Retrieved June 18 2021 Little Rock Climate Normals 1961 1990 National Oceanic and Atmospheric Administration Retrieved August 28 2023 WMO 1961 1990 Climate Normals for North Little Rock Airport National Oceanic and Atmospheric Administration Retrieved June 18 2021 Historical UV Index Data Little Rock AR UV Index Today Retrieved April 20 2023 External links Edit Retrieved from https en wikipedia org w index php title Climate of Little Rock Arkansas amp oldid 1166226775, wikipedia, wiki, book, books, library,
