Spring Weather in Raleigh North Carolina, United States
Daily high temperatures increase by 23°F, from 59°F to 82°F, rarely falling below 45°F or exceeding 90°F.
Daily low temperatures increase by 24°F, from 38°F to 63°F, rarely falling below 27°F or exceeding 70°F.
For reference, on July 21, the hottest day of the year, temperatures in Raleigh typically range from 71°F to 89°F, while on January 29, the coldest day of the year, they range from 33°F to 52°F.
Average High and Low Temperature in the Spring in Raleigh
The figure below shows you a compact characterization of the hourly average spring 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 Spring in Raleigh
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 spring in Raleigh experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 46% throughout the season. The lowest chance of overcast or mostly cloudy conditions is 43% on May 1.
The clearest day of the spring is May 1, with clear, mostly clear, or partly cloudy conditions 57% of the time.
For reference, on January 4, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 51%, while on October 12, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 65%.
Cloud Cover Categories in the Spring in Raleigh
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 Raleigh, the chance of a wet day over the course of the spring is very rapidly increasing, starting the season at 27% and ending it at 36%.
For reference, the year's highest daily chance of a wet day is 46% on July 16, and its lowest chance is 20% on October 31.
Over the course of the spring in Raleigh, the chance of a day with only rain increases from 24% to 36%, 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 the Spring in Raleigh
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 spring in Raleigh is gradually increasing, starting the season at 3.2 inches, when it rarely exceeds 5.6 inches or falls below 1.4 inches, and ending the season at 3.4 inches, when it rarely exceeds 6.1 inches or falls below 1.7 inches.
Average Monthly Rainfall in the Spring in Raleigh
As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day.
The average sliding 31-day snowfall during the spring in Raleigh is decreasing, starting the season at 1.7 inches, when it rarely exceeds 6.9 inches, and ending the season at 0.0 inches, when it rarely exceeds 0.0 inches or falls below -0.0 inches.
Average Monthly Snowfall in the Spring in Raleigh
Over the course of the spring in Raleigh, the length of the day is very rapidly increasing. From the start to the end of the season, the length of the day increases by 3 hours, 0 minutes, implying an average daily increase of 1 minute, 58 seconds, and weekly increase of 13 minutes, 49 seconds.
The shortest day of the spring is March 1, with 11 hours, 25 minutes of daylight and the longest day is May 31, with 14 hours, 24 minutes of daylight.
Hours of Daylight and Twilight in the Spring in Raleigh
The latest sunrise of the spring in Raleigh is 7:29 AM on March 12 and the earliest sunrise is 1 hour, 30 minutes earlier at 6:00 AM on May 31.
The earliest sunset is 6:09 PM on March 1 and the latest sunset is 2 hours, 15 minutes later at 8:24 PM on May 31.
Daylight saving time (DST) starts at 3:00 AM on March 12, 2023, shifting sunrise and sunset to be an hour later.
For reference, on June 21, the longest day of the year, the Sun rises at 5:58 AM and sets 14 hours, 35 minutes later, at 8:33 PM, while on December 22, the shortest day of the year, it rises at 7:21 AM and sets 9 hours, 44 minutes later, at 5:05 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in the Spring in Raleigh
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 Spring in Raleigh
The figure below presents a compact representation of key lunar data for the spring of 2023. 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 Spring in Raleigh
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 Raleigh is very rapidly increasing during the spring, rising from 0% to 37% over the course of the season.
For reference, on July 24, the muggiest day of the year, there are muggy conditions 86% of the time, while on January 30, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in the Spring in Raleigh
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
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 Raleigh is decreasing during the spring, decreasing from 7.3 miles per hour to 5.6 miles per hour over the course of the season.
For reference, on March 8, the windiest day of the year, the daily average wind speed is 7.4 miles per hour, while on August 9, the calmest day of the year, the daily average wind speed is 4.7 miles per hour.
The highest daily average wind speed during the spring is 7.4 miles per hour on March 8.
Average Wind Speed in the Spring in Raleigh
The wind direction in Raleigh during the spring is predominantly out of the north from March 1 to March 19 and the south from March 19 to May 31.
Wind Direction in the Spring in Raleigh
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 Raleigh typically lasts for 7.3 months (224 days), from around March 28 to around November 6, rarely starting before March 8 or after April 18, and rarely ending before October 20 or after November 25.
During the spring in Raleigh, the chance that a given day is within the growing season is very rapidly increasing rising from 3% to 100% over the course of the season.
Time Spent in Various Temperature Bands and the Growing Season in the Spring in Raleigh
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
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 Raleigh are very rapidly increasing during the spring, increasing by 1,090°F, from 133°F to 1,223°F, over the course of the season.
Growing Degree Days in the Spring in Raleigh
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 Raleigh is very rapidly increasing during the spring, rising by 2.6 kWh, from 4.1 kWh to 6.7 kWh, over the course of the season.
Average Daily Incident Shortwave Solar Energy in the Spring in Raleigh
For the purposes of this report, the geographical coordinates of Raleigh are 35.772 deg latitude, -78.639 deg longitude, and 312 ft elevation.
The topography within 2 miles of Raleigh contains only modest variations in elevation, with a maximum elevation change of 217 feet and an average elevation above sea level of 292 feet. Within 10 miles also contains only modest variations in elevation (443 feet). Within 50 miles contains only modest variations in elevation (968 feet).
The area within 2 miles of Raleigh is covered by artificial surfaces (100%), within 10 miles by artificial surfaces (57%) and trees (31%), and within 50 miles by trees (51%) and cropland (36%).
This report illustrates the typical weather in Raleigh, 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 5 weather stations near enough to contribute to our estimation of the temperature and dew point in Raleigh.
For each station, the records are corrected for the elevation difference between that station and Raleigh 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 Raleigh is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Raleigh and a given station.
The stations contributing to this reconstruction are:
To get a sense of how much these sources agree with each other, you can view a comparison of Raleigh 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.
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.
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.
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