Average Weather in Dayton Texas, United States
In Dayton, the summers are long, hot, and oppressive; the winters are short and cold; and it is wet and partly cloudy year round. Over the course of the year, the temperature typically varies from 44°F to 93°F and is rarely below 31°F or above 98°F.
Based on the tourism score, the best times of year to visit Dayton for warm-weather activities are from late March to late May and from late September to late October.
The hot season lasts for 4.0 months, from May 25 to September 24, with an average daily high temperature above 87°F. The hottest day of the year is August 6, with an average high of 93°F and low of 75°F.
The cool season lasts for 2.8 months, from November 28 to February 23, with an average daily high temperature below 68°F. The coldest day of the year is January 7, with an average low of 44°F and high of 62°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
Bou Attouche, Tunisia (5,839 miles away); Fuzhou, China (7,957 miles); and Roxby Downs, Australia (9,386 miles) are the far-away foreign places with temperatures most similar to Dayton (view comparison).
In Dayton, 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 Dayton begins around September 16 and lasts for 2.3 months, ending around November 26. On October 12, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 69% of the time, and overcast or mostly cloudy 31% of the time.
The cloudier part of the year begins around November 26 and lasts for 9.7 months, ending around September 16. On August 20, the cloudiest day of the year, the sky is overcast or mostly cloudy 48% of the time, and clear, mostly clear, or partly cloudy 52% 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 Dayton varies throughout the year.
The wetter season lasts 3.9 months, from May 21 to September 18, 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 23.
The drier season lasts 8.1 months, from September 18 to May 21. The smallest chance of a wet day is 22% on April 1.
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 23.
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. Dayton experiences some seasonal variation in monthly rainfall.
Rain falls throughout the year in Dayton. The most rain falls during the 31 days centered around June 8, with an average total accumulation of 4.8 inches.
The least rain falls around August 1, with an average total accumulation of 2.9 inches.
Average Monthly Rainfall
The length of the day in Dayton varies significantly over the course of the year. In 2018, the shortest day is December 21, with 10 hours, 13 minutes of daylight; the longest day is June 21, with 14 hours, 5 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 6:17 AM on June 11, and the latest sunrise is 1 hour, 17 minutes later at 7:35 AM on November 3. The earliest sunset is at 5:19 PM on December 1, and the latest sunset is 3 hours, 6 minutes later at 8:24 PM on June 30.
Daylight saving time (DST) is observed in Dayton 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
Dayton experiences extreme seasonal variation in the perceived humidity.
The muggier period of the year lasts for 6.8 months, from April 7 to November 1, during which time the comfort level is muggy, oppressive, or miserable at least 28% of the time. The muggiest day of the year is July 22, with muggy conditions 99% of the time.
The least muggy day of the year is January 23, with muggy conditions 5% of the time.
Humidity Comfort Levels
The average hourly wind speed in Dayton experiences mild seasonal variation over the course of the year.
The windier part of the year lasts for 7.6 months, from October 19 to June 6, with average wind speeds of more than 6.5 miles per hour. The windiest day of the year is April 11, with an average hourly wind speed of 7.8 miles per hour.
The calmer time of year lasts for 4.4 months, from June 6 to October 19. The calmest day of the year is August 16, with an average hourly wind speed of 5.2 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Dayton varies throughout the year.
The wind is most often from the south for 7.5 months, from February 7 to September 21 and for 2.1 months, from October 1 to December 3, with a peak percentage of 71% on June 27. The wind is most often from the east for 1.4 weeks, from September 21 to October 1, with a peak percentage of 36% on September 22. The wind is most often from the north for 2.1 months, from December 3 to February 7, with a peak percentage of 37% on January 1.
Dayton 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 significant seasonal variation over the course of the year.
The time of year with warmer water lasts for 4.0 months, from May 31 to September 30, with an average temperature above 80°F. The day of the year with the warmest water is August 13, with an average temperature of 86°F.
The time of year with cooler water lasts for 3.2 months, from December 9 to March 17, with an average temperature below 64°F. The day of the year with the coolest water is January 27, with an average temperature of 58°F.
Average Water Temperature
Best Time of Year to Visit
To characterize how pleasant the weather is in Dayton 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 Dayton for general outdoor tourist activities are from late March to late May and from late September to late October, with a peak score in the last week of April.
The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best times of year to visit Dayton for hot-weather activities are from early May to early July and from late August to late September, with a peak score in the first week of June.
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 Dayton typically lasts for 10 months (302 days), from around February 9 to around December 9, rarely starting after March 17, or ending before November 15.
Time Spent in Various Temperature Bands and the Growing Season
Based on growing degree days alone, the first spring blooms in Dayton should appear around January 17, only rarely appearing before January 10 or after January 29.
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 4.0 months, from April 5 to August 7, with an average daily incident shortwave energy per square meter above 5.9 kWh. The brightest day of the year is June 3, with an average of 6.6 kWh.
The darker period of the year lasts for 2.6 months, from November 14 to February 2, with an average daily incident shortwave energy per square meter below 3.7 kWh. The darkest day of the year is December 24, with an average of 2.9 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Dayton are 30.047 deg latitude, -94.885 deg longitude, and 69 ft elevation.
The topography within 2 miles of Dayton is essentially flat, with a maximum elevation change of 72 feet and an average elevation above sea level of 60 feet. Within 10 miles is essentially flat (105 feet). Within 50 miles also contains only modest variations in elevation (443 feet).
The area within 2 miles of Dayton is covered by herbaceous vegetation (51%), cropland (35%), and artificial surfaces (14%), within 10 miles by herbaceous vegetation (50%) and cropland (45%), and within 50 miles by herbaceous vegetation (30%) and cropland (22%).
This report illustrates the typical weather in Dayton, 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 4 weather stations near enough to contribute to our estimation of the temperature and dew point in Dayton.
For each station, the records are corrected for the elevation difference between that station and Dayton 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 Dayton is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Dayton and a given station.
The stations contributing to this reconstruction are: George Bush Intercontinental Airport (33%, 46 kilometers, west); Ellington Field (25%, 55 kilometers, southwest); Montgomery County Airport (21%, 61 kilometers, northwest); and Beaumont Municipal Airport (20%, 65 kilometers, east).
Time zones for aiports and weather stations are provided by AskGeo.com .