This report describes the typical weather at the Waco Regional Airport (Waco, Texas, United States) weather station over the course of an average year. It is based on the historical records from 1974 to 2012. Earlier records are either unavailable or unreliable.
Waco, Texas has a warm humid temperate climate with hot summers and no dry season. The area within 25 mi of this station is covered by grasslands (93%), croplands (5%), and lakes and rivers (2%).
Over the course of a year, the temperature typically varies from 36°F to 97°F and is rarely below 25°F or above 102°F.
The warm season lasts from June 1 to September 17 with an average daily high temperature above 89°F. The hottest day of the year is July 27, with an average high of 97°F and low of 75°F.
The cold season lasts from November 27 to February 21 with an average daily high temperature below 64°F. The coldest day of the year is January 3, with an average low of 36°F and high of 56°F.
The length of the day varies significantly over the course of the year. The shortest day is December 21 with 10:05 hours of daylight; the longest day is June 20 with 14:12 hours of daylight.
The earliest sunrise is at 6:23am on June 12 and the latest sunset is at 8:38pm on June 28. The latest sunrise is at 7:48am on November 3 and the earliest sunset is at 5:25pm on December 4.
Daylight saving time (DST) is observed in this location during 2012, starting in the spring on March 11 and ending in the fall on November 4.
The median cloud cover ranges from 13% (mostly clear) to 57% (partly cloudy). The sky is cloudiest on February 28 and clearest on August 6. The clearer part of the year begins around June 7. The cloudier part of the year begins around November 17.
On August 6, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 80% of the time, and overcast or mostly cloudy 17% of the time.
On February 28, the cloudiest day of the year, the sky is overcast, mostly cloudy, or partly cloudy 54% of the time, and clear or mostly clear 45% of the time.
The probability that precipitation will be observed at this location varies throughout the year. Precipitation is most likely around April 21, occurring in 36% of days. Precipitation is least likely around July 27, occurring in 21% of days.
Over the entire year, the most common forms of precipitation are thunderstorms, light rain, and moderate rain.
Thunderstorms are the most severe precipitation observed during 40% of those days with precipitation. They are most likely around May 17, when it is observed during 23% of all days.
Light rain is the most severe precipitation observed during 33% of those days with precipitation. It is most likely around January 7, when it is observed during 15% of all days.
Moderate rain is the most severe precipitation observed during 14% of those days with precipitation. It is most likely around December 1, when it is observed during 6% of all days.
During the warm season, which lasts from June 1 to September 17, there is a 24% average chance that precipitation will be observed at some point during a given day. When precipitation does occur it is most often in the form of thunderstorms (58% of days with precipitation have at worst thunderstorms), light rain (24%), moderate rain (13%), and heavy rain (5%).
During the cold season, which lasts from November 27 to February 21, there is a 32% average chance that precipitation will be observed at some point during a given day. When precipitation does occur it is most often in the form of light rain (43% of days with precipitation have at worst light rain), thunderstorms (18%), moderate rain (16%), and drizzle (9%).
The likelihood of snow falling is highest around January 14, occurring in 4% of days.
Either snow rarely accumulates at this location or snow depth measurements are unavailable or unreliable.
The relative humidity typically ranges from 36% (comfortable) to 92% (very humid) over the course of the year, rarely dropping below 22% (dry) and reaching as high as 100% (very humid).
The air is driest around July 28, at which time the relative humidity drops below 41% (comfortable) three days out of four; it is most humid around May 7, exceeding 89% (very humid) three days out of four.
Dew point is often a better measure of how comfortable a person will find the weather than relative humidity because it more directly relates to whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid.
Over the course of a year, the dew point typically varies from 28°F (dry) to 73°F (very muggy) and is rarely below 15°F (dry) or above 76°F (very muggy).
There are two periods in the year that are most comfortable: The first is between March 4 and May 6 and the second is between September 25 and November 25. The air feels neither too dry nor too muggy during these periods.
Over the course of the year typical wind speeds vary from 1 mph to 20 mph (light air to fresh breeze), rarely exceeding 26 mph (strong breeze).
The highest average wind speed of 12 mph (gentle breeze) occurs around March 28, at which time the average daily maximum wind speed is 19 mph (fresh breeze).
The lowest average wind speed of 8 mph (gentle breeze) occurs around August 31, at which time the average daily maximum wind speed is 15 mph (moderate breeze).