Average Weather in Morrisville Pennsylvania, United States
In Morrisville, the summers are warm and partly cloudy and the winters are short, very cold, and mostly cloudy. Over the course of the year, the temperature typically varies from 23°F to 83°F and is rarely below 6°F or above 90°F.
Based on the tourism score, the best time of year to visit Morrisville for warm-weather activities is from mid June to mid September.
The warm season lasts for 3.8 months, from May 26 to September 19, with an average daily high temperature above 74°F. The hottest day of the year is July 20, with an average high of 83°F and low of 63°F.
The cold season lasts for 3.0 months, from December 3 to March 2, with an average daily high temperature below 47°F. The coldest day of the year is January 30, with an average low of 23°F and high of 38°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 Morrisville, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.
The clearer part of the year in Morrisville begins around May 29 and lasts for 5.5 months, ending around November 13. On September 3, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 66% of the time, and overcast or mostly cloudy 34% of the time.
The cloudier part of the year begins around November 13 and lasts for 6.5 months, ending around May 29. On January 12, the cloudiest day of the year, the sky is overcast or mostly cloudy 69% of the time, and clear, mostly clear, or partly cloudy 31% of the time.
Cloud Cover Categories
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. The chance of wet days in Morrisville varies throughout the year.
The wetter season lasts 5.1 months, from March 18 to August 21, with a greater than 31% chance of a given day being a wet day. The chance of a wet day peaks at 41% on June 16.
The drier season lasts 6.9 months, from August 21 to March 18. The smallest chance of a wet day is 21% on January 28.
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 41% on June 16.
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. Morrisville experiences some seasonal variation in monthly rainfall.
Rain falls throughout the year in Morrisville. The most rain falls during the 31 days centered around June 5, with an average total accumulation of 3.4 inches.
The least rain falls around January 22, with an average total accumulation of 1.7 inches.
Average Monthly Rainfall
We report snowfall in liquid-equivalent terms. The actual depth of new snowfall is typically between 5 and 10 times the liquid-equivalent amount, assuming the ground is frozen. Colder, drier snow tends to be on the higher end of that range and warmer, wetter snow on the lower end.
As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. Morrisville experiences some seasonal variation in monthly liquid-equivalent snowfall.
The snowy period of the year lasts for 4.0 months, from November 29 to March 30, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around February 11, with an average total liquid-equivalent accumulation of 0.3 inches.
The snowless period of the year lasts for 8.0 months, from March 30 to November 29. The least snow falls around July 18, with an average total liquid-equivalent accumulation of 0.0 inches.
Average Liquid-Equivalent Monthly Snowfall
The length of the day in Morrisville varies significantly over the course of the year. In 2021, the shortest day is December 21, with 9 hours, 20 minutes of daylight; the longest day is June 20, with 15 hours, 0 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:51 AM on June 13, and the latest sunrise is 2 hours, 4 minutes later at 7:55 AM on November 6. The earliest sunset is at 4:55 PM on December 6, and the latest sunset is 3 hours, 58 minutes later at 8:53 PM on June 27.
Daylight saving time (DST) is observed in Morrisville during 2021, starting in the spring on March 14, lasting 7.8 months, and ending in the fall on November 7.
Sunrise & Sunset with Twilight and Daylight Saving Time
The figure below presents a compact representation of key lunar data for 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.
Moon Rise, Set & Phases
Morrisville experiences significant seasonal variation in the perceived humidity.
The muggier period of the year lasts for 3.6 months, from May 31 to September 18, during which time the comfort level is muggy, oppressive, or miserable at least 10% of the time. The muggiest day of the year is July 21, with muggy conditions 39% of the time.
The least muggy day of the year is December 4, when muggy conditions are essentially unheard of.
Humidity Comfort Levels
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in Morrisville experiences significant seasonal variation over the course of the year.
The windier part of the year lasts for 5.4 months, from November 14 to April 26, with average wind speeds of more than 4.8 miles per hour. The windiest day of the year is February 2, with an average hourly wind speed of 6.4 miles per hour.
The calmer time of year lasts for 6.6 months, from April 26 to November 14. The calmest day of the year is August 14, with an average hourly wind speed of 3.2 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Morrisville varies throughout the year.
The wind is most often from the south for 1.3 months, from August 27 to October 5, with a peak percentage of 34% on October 4. The wind is most often from the west for 11 months, from October 5 to August 27, with a peak percentage of 48% on January 1.
Best Time of Year to Visit
To characterize how pleasant the weather is in Morrisville 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 time of year to visit Morrisville for general outdoor tourist activities is from mid June to mid September, with a peak score in the second week of August.
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 Morrisville for hot-weather activities is from late June to late August, with a peak score in the third week of July.
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 Morrisville typically lasts for 5.7 months (174 days), from around April 28 to around October 19, rarely starting before April 10 or after May 19, and rarely ending before October 2 or after November 7.
Time Spent in Various Temperature Bands and the Growing Season
Based on growing degree days alone, the first spring blooms in Morrisville should appear around March 28, only rarely appearing before March 12 or after April 11.
Growing Degree Days
The average daily incident shortwave solar energy experiences extreme seasonal variation over the course of the year.
The brighter period of the year lasts for 3.9 months, from May 1 to August 29, with an average daily incident shortwave energy per square meter above 5.8 kWh. The brightest day of the year is June 23, with an average of 6.8 kWh.
The darker period of the year lasts for 3.2 months, from November 7 to February 14, with an average daily incident shortwave energy per square meter below 2.7 kWh. The darkest day of the year is December 25, with an average of 1.6 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Morrisville are 39.895 deg latitude, -80.162 deg longitude, and 971 ft elevation.
The topography within 2 miles of Morrisville contains significant variations in elevation, with a maximum elevation change of 531 feet and an average elevation above sea level of 1,118 feet. Within 10 miles contains significant variations in elevation (873 feet). Within 50 miles contains very significant variations in elevation (2,631 feet).
The area within 2 miles of Morrisville is covered by trees (63%), artificial surfaces (23%), and cropland (14%), within 10 miles by trees (80%) and cropland (19%), and within 50 miles by trees (73%) and cropland (16%).
This report illustrates the typical weather in Morrisville, 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 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Morrisville.
For each station, the records are corrected for the elevation difference between that station and Morrisville 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 Morrisville is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Morrisville and a given station.
Time zones for airports and weather stations are provided by AskGeo.com .