Average Weather in West Helena Arkansas, United States
In West Helena, the summers are long, hot, and muggy; the winters are short, very cold, wet, and windy; and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 34°F to 91°F and is rarely below 21°F or above 97°F.
Based on the tourism score, the best times of year to visit West Helena for warm-weather activities are from late April to mid June and from mid August to mid October.
The hot season lasts for 4.0 months, from May 22 to September 23, with an average daily high temperature above 83°F. The hottest day of the year is July 21, with an average high of 91°F and low of 72°F.
The cool season lasts for 2.9 months, from November 28 to February 25, with an average daily high temperature below 58°F. The coldest day of the year is January 16, with an average low of 34°F and high of 50°F.
Average High and Low Temperature
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.
Average Hourly Temperature
In West Helena, 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 West Helena begins around June 11 and lasts for 5.0 months, ending around November 12. On October 5, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 69% of the time, and overcast or mostly cloudy 31% of the time.
The cloudier part of the year begins around November 12 and lasts for 7.0 months, ending around June 11. On January 3, the cloudiest day of the year, the sky is overcast or mostly cloudy 50% of the time, and clear, mostly clear, or partly cloudy 50% 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 West Helena varies throughout the year.
The wetter season lasts 5.4 months, from February 20 to August 1, with a greater than 30% chance of a given day being a wet day. The chance of a wet day peaks at 38% on May 15.
The drier season lasts 6.7 months, from August 1 to February 20. The smallest chance of a wet day is 22% on September 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 38% on May 15.
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. West Helena experiences significant seasonal variation in monthly rainfall.
Rain falls throughout the year in West Helena. The most rain falls during the 31 days centered around April 27, with an average total accumulation of 5.1 inches.
The least rain falls around August 24, with an average total accumulation of 2.0 inches.
Average Monthly Rainfall
The sliding 31-day liquid-equivalent quantity of snowfall in West Helena does not vary significantly over the course of the year, staying within 0.1 inches of 0.1 inches throughout.
Average Liquid-Equivalent Monthly Snowfall
The length of the day in West Helena varies significantly over the course of the year. In 2018, the shortest day is December 21, with 9 hours, 50 minutes of daylight; the longest day is June 21, with 14 hours, 28 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:49 AM on June 12, and the latest sunrise is 1 hour, 36 minutes later at 7:24 AM on November 3. The earliest sunset is at 4:51 PM on December 5, and the latest sunset is 3 hours, 28 minutes later at 8:19 PM on June 29.
Daylight saving time (DST) is observed in West Helena 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
West Helena experiences extreme seasonal variation in the perceived humidity.
The muggier period of the year lasts for 4.9 months, from May 6 to October 2, during which time the comfort level is muggy, oppressive, or miserable at least 23% of the time. The muggiest day of the year is July 22, with muggy conditions 92% of the time.
The least muggy day of the year is January 23, when muggy conditions are essentially unheard of.
Humidity Comfort Levels
The average hourly wind speed in West Helena experiences significant seasonal variation over the course of the year.
The windier part of the year lasts for 7.3 months, from October 14 to May 25, with average wind speeds of more than 8.2 miles per hour. The windiest day of the year is April 1, with an average hourly wind speed of 10.5 miles per hour.
The calmer time of year lasts for 4.7 months, from May 25 to October 14. The calmest day of the year is July 28, with an average hourly wind speed of 5.9 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in West Helena varies throughout the year.
The wind is most often from the south for 6.5 months, from February 26 to September 12 and for 2.3 months, from October 7 to December 17, with a peak percentage of 49% on May 19. The wind is most often from the north for 3.6 weeks, from September 12 to October 7 and for 2.3 months, from December 17 to February 26, with a peak percentage of 34% on September 29.
Best Time of Year to Visit
To characterize how pleasant the weather is in West Helena 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 West Helena for general outdoor tourist activities are from late April to mid June and from mid August to mid October, with a peak score in the third 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 West Helena for hot-weather activities is from early June to mid September, with a peak score in the last week of August.
For 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.
The growing season in West Helena typically lasts for 7.9 months (241 days), from around March 18 to around November 15, rarely starting before February 26 or after April 9, and rarely ending before October 27 or after December 3.
Time Spent in Various Temperature Bands and the Growing Season
Based on growing degree days alone, the first spring blooms in West Helena should appear around February 15, only rarely appearing before January 30 or after March 4.
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 4.6 months, from April 12 to August 31, with an average daily incident shortwave energy per square meter above 5.9 kWh. The brightest day of the year is June 19, with an average of 6.7 kWh.
The darker period of the year lasts for 2.8 months, from November 11 to February 5, with an average daily incident shortwave energy per square meter below 3.3 kWh. The darkest day of the year is December 24, with an average of 2.5 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of West Helena are 34.551 deg latitude, -90.642 deg longitude, and 249 ft elevation.
The topography within 2 miles of West Helena contains only modest variations in elevation, with a maximum elevation change of 230 feet and an average elevation above sea level of 273 feet. Within 10 miles also contains only modest variations in elevation (279 feet). Within 50 miles also contains only modest variations in elevation (387 feet).
The area within 2 miles of West Helena is covered by artificial surfaces (39%), cropland (33%), and trees (26%), within 10 miles by cropland (66%) and herbaceous vegetation (14%), and within 50 miles by cropland (76%) and herbaceous vegetation (13%).
This report illustrates the typical weather in West Helena, 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 3 weather stations near enough to contribute to our estimation of the temperature and dew point in West Helena.
For each station, the records are corrected for the elevation difference between that station and West Helena 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 West Helena is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between West Helena and a given station.
The stations contributing to this reconstruction are: Fletcher Field (45%, 30 kilometers, southeast); Tunica Municipal Airport (45%, 31 kilometers, northeast); and Stuttgart Municipal Airport (10%, 86 kilometers, west).
Time zones for aiports and weather stations are provided by AskGeo.com .