Average Weather in White Oak Maryland, United States
In White Oak, the summers are warm and humid, the winters are very cold and windy, and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 26°F to 87°F and is rarely below 13°F or above 95°F.
Based on the tourism score, the best times of year to visit White Oak for warm-weather activities are from early June to early July and from early August to late September.
The hot season lasts for 3.5 months, from May 30 to September 15, with an average daily high temperature above 78°F. The hottest day of the year is July 21, with an average high of 87°F and low of 68°F.
The cold season lasts for 3.1 months, from December 1 to March 4, with an average daily high temperature below 51°F. The coldest day of the year is January 30, with an average low of 26°F and high of 43°F.
Average High and Low Temperature
Average Hourly Temperature
In White Oak, 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 White Oak begins around July 2 and lasts for 4.4 months, ending around November 14. On September 23, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 65% of the time, and overcast or mostly cloudy 35% of the time.
The cloudier part of the year begins around November 14 and lasts for 7.6 months, ending around July 2. On January 5, the cloudiest day of the year, the sky is overcast or mostly cloudy 53% of the time, and clear, mostly clear, or partly cloudy 47% 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 White Oak varies throughout the year.
The wetter season lasts 4.5 months, from April 9 to August 26, with a greater than 30% chance of a given day being a wet day. The chance of a wet day peaks at 38% on July 12.
The drier season lasts 7.5 months, from August 26 to April 9. The smallest chance of a wet day is 21% on October 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 July 12.
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. White Oak experiences some seasonal variation in monthly rainfall.
Rain falls throughout the year in White Oak. The most rain falls during the 31 days centered around May 26, with an average total accumulation of 3.6 inches.
The least rain falls around January 30, with an average total accumulation of 1.9 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. White Oak experiences some seasonal variation in monthly liquid-equivalent snowfall.
The snowy period of the year lasts for 4.2 months, from November 21 to March 26, 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 5, with an average total liquid-equivalent accumulation of 0.7 inches.
The snowless period of the year lasts for 7.8 months, from March 26 to November 21. The least snow falls around July 19, with an average total liquid-equivalent accumulation of 0.0 inches.
Average Liquid-Equivalent Monthly Snowfall
The length of the day in White Oak varies significantly over the course of the year. In 2018, the shortest day is December 21, with 9 hours, 25 minutes of daylight; the longest day is June 21, with 14 hours, 55 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:41 AM on June 13, and the latest sunrise is 1 hour, 56 minutes later at 7:37 AM on November 3. The earliest sunset is at 4:45 PM on December 7, and the latest sunset is 3 hours, 53 minutes later at 8:37 PM on June 27.
Daylight saving time (DST) is observed in White Oak 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
White Oak experiences extreme seasonal variation in the perceived humidity.
The muggier period of the year lasts for 4.1 months, from May 24 to September 27, during which time the comfort level is muggy, oppressive, or miserable at least 16% of the time. The muggiest day of the year is July 29, with muggy conditions 65% of the time.
The least muggy day of the year is February 19, when muggy conditions are essentially unheard of.
Humidity Comfort Levels
The average hourly wind speed in White Oak experiences significant seasonal variation over the course of the year.
The windier part of the year lasts for 6.6 months, from October 21 to May 9, with average wind speeds of more than 8.5 miles per hour. The windiest day of the year is February 26, with an average hourly wind speed of 10.6 miles per hour.
The calmer time of year lasts for 5.4 months, from May 9 to October 21. The calmest day of the year is August 1, with an average hourly wind speed of 6.4 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in White Oak varies throughout the year.
The wind is most often from the north for 2.0 weeks, from March 8 to March 22, with a peak percentage of 31% on March 10. The wind is most often from the west for 1.4 months, from March 22 to May 2; for 1.0 months, from June 23 to July 24; and for 4.9 months, from October 11 to March 8, with a peak percentage of 36% on July 6. The wind is most often from the south for 1.7 months, from May 2 to June 23 and for 2.6 months, from July 24 to October 11, with a peak percentage of 35% on August 16.
White Oak is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.
The average water temperature experiences extreme seasonal variation over the course of the year.
The time of year with warmer water lasts for 3.3 months, from June 24 to October 2, with an average temperature above 69°F. The day of the year with the warmest water is August 11, with an average temperature of 77°F.
The time of year with cooler water lasts for 3.6 months, from December 19 to April 6, with an average temperature below 44°F. The day of the year with the coolest water is February 8, with an average temperature of 36°F.
Average Water Temperature
Best Time of Year to Visit
To characterize how pleasant the weather is in White Oak 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 White Oak for general outdoor tourist activities are from early June to early July and from early August to late September, with a peak score in the first 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 White Oak for hot-weather activities is from late June to early September, with a peak score in the third week of July.
The growing season in White Oak typically lasts for 6.7 months (205 days), from around April 8 to around October 30, rarely starting before March 21 or after April 26, and rarely ending before October 12 or after November 17.
Time Spent in Various Temperature Bands and the Growing Season
Based on growing degree days alone, the first spring blooms in White Oak should appear around March 22, only rarely appearing before March 6 or after April 8.
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 3.9 months, from April 28 to August 23, with an average daily incident shortwave energy per square meter above 5.9 kWh. The brightest day of the year is June 23, with an average of 6.9 kWh.
The darker period of the year lasts for 3.1 months, from November 6 to February 9, with an average daily incident shortwave energy per square meter below 3.0 kWh. The darkest day of the year is December 23, with an average of 2.0 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of White Oak are 39.040 deg latitude, -76.993 deg longitude, and 315 ft elevation.
The topography within 2 miles of White Oak contains only modest variations in elevation, with a maximum elevation change of 305 feet and an average elevation above sea level of 314 feet. Within 10 miles contains only modest variations in elevation (561 feet). Within 50 miles contains significant variations in elevation (1,909 feet).
The area within 2 miles of White Oak is covered by artificial surfaces (81%) and trees (19%), within 10 miles by artificial surfaces (66%) and trees (27%), and within 50 miles by trees (37%) and cropland (28%).
This report illustrates the typical weather in White Oak, 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 White Oak.
For each station, the records are corrected for the elevation difference between that station and White Oak 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 White Oak is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between White Oak and a given station.
The stations contributing to this reconstruction are: College Park Airport (63%, 9 kilometers, southeast); Montgomery County Airpark (26%, 21 kilometers, northwest); and Washington Dulles International Airport (10%, 41 kilometers, west).
Time zones for aiports and weather stations are provided by AskGeo.com .