Average Weather in April in Sewickley Pennsylvania, United States
Daily high temperatures increase by 11°F, from 57°F to 67°F, rarely falling below 41°F or exceeding 80°F.
Daily low temperatures increase by 9°F, from 38°F to 47°F, rarely falling below 25°F or exceeding 59°F.
For reference, on July 20, the hottest day of the year, temperatures in Sewickley typically range from 65°F to 83°F, while on January 29, the coldest day of the year, they range from 22°F to 36°F.
Average High and Low Temperature in April
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on April. 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 April
The month of April in Sewickley experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 54% throughout the month.
The clearest day of the month is April 28, with clear, mostly clear, or partly cloudy conditions 48% of the time.
For reference, on January 12, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 69%, while on August 27, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 66%.
Cloud Cover Categories in April
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Sewickley, the chance of a wet day over the course of April is essentially constant, remaining around 32% throughout.
For reference, the year's highest daily chance of a wet day is 40% on June 16, and its lowest chance is 20% on January 30.
Over the course of April in Sewickley, the chance of a day with only rain increases from 31% to 34%, the chance of a day with mixed snow and rain remains an essentially constant 1% throughout, and the chance of a day with only snow remains an essentially constant 0% throughout.
Probability of Precipitation in April
The average sliding 31-day rainfall during April in Sewickley is gradually increasing, starting the month at 2.5 inches, when it rarely exceeds 4.0 inches or falls below 1.3 inches, and ending the month at 2.8 inches, when it rarely exceeds 4.6 inches or falls below 1.4 inches.
Average Monthly Rainfall in April
Over the course of April in Sewickley, the length of the day is rapidly increasing. From the start to the end of the month, the length of the day increases by 1 hour, 13 minutes, implying an average daily increase of 2 minutes, 32 seconds, and weekly increase of 17 minutes, 44 seconds.
The shortest day of the month is April 1, with 12 hours, 42 minutes of daylight and the longest day is April 30, with 13 hours, 55 minutes of daylight.
Hours of Daylight and Twilight in April
The latest sunrise of the month in Sewickley is 7:03 AM on April 1 and the earliest sunrise is 43 minutes earlier at 6:20 AM on April 30.
The earliest sunset is 7:45 PM on April 1 and the latest sunset is 30 minutes later at 8:15 PM on April 30.
Daylight saving time is observed in Sewickley during 2021, but it neither starts nor ends during April, so the entire month is in daylight saving time.
For reference, on June 21, the longest day of the year, the Sun rises at 5:50 AM and sets 15 hours, 5 minutes later, at 8:54 PM, while on December 21, the shortest day of the year, it rises at 7:40 AM and sets 9 hours, 16 minutes later, at 4:57 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in April
The figure below presents a compact representation of key lunar data for April 2021. 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 April
The chance that a given day will be muggy in Sewickley is essentially constant during April, remaining around 0% throughout.
For reference, on July 21, the muggiest day of the year, there are muggy conditions 38% of the time, while on January 1, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in April
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in Sewickley is gradually decreasing during April, decreasing from 5.7 miles per hour to 4.8 miles per hour over the course of the month.
For reference, on February 2, the windiest day of the year, the daily average wind speed is 6.5 miles per hour, while on August 4, the calmest day of the year, the daily average wind speed is 3.3 miles per hour.
Average Wind Speed in April
The hourly average wind direction in Sewickley throughout April is predominantly from the west, with a peak proportion of 38% on April 11.
Wind Direction in April
The growing season in Sewickley typically lasts for 6.2 months (191 days), from around April 18 to around October 26, rarely starting before March 31 or after May 9, and rarely ending before October 8 or after November 14.
During April in Sewickley, the chance that a given day is within the growing season is very rapidly increasing rising from 12% to 77% over the course of the month.
Time Spent in Various Temperature Bands and the Growing Season in April
The average accumulated growing degree days in Sewickley are gradually increasing during April, increasing by 173°F, from 89°F to 261°F, over the course of the month.
Growing Degree Days in April
The average daily incident shortwave solar energy in Sewickley is increasing during April, rising by 1.1 kWh, from 4.6 kWh to 5.7 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in April
For the purposes of this report, the geographical coordinates of Sewickley are 40.536 deg latitude, -80.185 deg longitude, and 738 ft elevation.
The topography within 2 miles of Sewickley contains significant variations in elevation, with a maximum elevation change of 554 feet and an average elevation above sea level of 924 feet. Within 10 miles also contains significant variations in elevation (673 feet). Within 50 miles contains significant variations in elevation (1,732 feet).
The area within 2 miles of Sewickley is covered by trees (50%) and artificial surfaces (43%), within 10 miles by trees (49%) and artificial surfaces (43%), and within 50 miles by trees (57%) and cropland (28%).
This report illustrates the typical weather in Sewickley, 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 Sewickley.
For each station, the records are corrected for the elevation difference between that station and Sewickley 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 Sewickley is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Sewickley and a given station.
The stations contributing to this reconstruction are: Pittsburgh International Airport (71%, 6 kilometers, southwest); Butler-Graham Airport (19%, 33 kilometers, northeast); and New Castle Municipal Airport (9%, 59 kilometers, north).
Time zones for airports and weather stations are provided by AskGeo.com .