August weather forecastColumbia, MD
August
Weather in August
August marks the gradual transition from the fierce heat of July towards a milder, yet still warm September. Despite the slight towel off from the heat, Columbia continues to boast of lovely sunlit days and clear skies. Humidity and rainfall increase, reflecting a frequent mix of sunshine and showers. Distinguishably, rainfall is at its highest with 4.06" (103mm) recorded, making it the wettest month of the year. As August ends, Columbia gently steps into September, eager for its seasonal gifts.Temperature
The transition into August shows a subtle variation to a still moderately hot 83.8°F (28.8°C) from July's 85.8°F (29.9°C) in the average high-temperature. Throughout August, the temperature falls to an average low of 67.3°F (19.6°C).Heat index
In August, the heat index is computed to be a tropical 91.4°F (33°C). Implement additional cautionary measures, heat cramps and heat exhaustion could occur. Prolonged activity might induce heatstroke.In reference to the heat index, it's for places in shade and with a slight wind. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', reflects the blend of air temperature and relative humidity to give a temperature impression. A person's impression of weather can be shaped by many aspects, among them metabolic variations, pregnancy, and levels of physical activity. It is essential to be conscious of the fact that direct sunlight can intensify the felt heat, leading to an elevation in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Juveniles often do not understand the need to recuperate and rehydrate. Thirst is a delayed symptom of dehydration - hence, it is vital to maintain hydration, particularly during ongoing physical activities.
Humidity
The average relative humidity in August is 73%.Rainfall
The month with the most rainfall is August, when the rain falls for 17.1 days and typically aggregates up to 4.06" (103mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
In Columbia, the average length of the day in August is 13h and 40min.On the first day of the month, sunrise is at 6:08 am and sunset at 8:19 pm. On the last day of August, sunrise is at 6:35 am and sunset at 7:39 pm EDT.
Sunshine
In Columbia, the average sunshine in August is 10.4h.UV index
The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for the average person.Note: A maximum high UV index of 6 in August translates into the following recommendations:
Inhibit overexposure. Warding off sun damage is of utmost importance. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Columbia, MD
- Average high temperature in August: 83.8°F
The warmest month (with the highest average high temperature) is July (85.8°F).
The month with the lowest average high temperature is January (38.1°F).
- Average low temperature in August: 67.3°F
The month with the highest average low temperature is July (68.9°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).
Average pressure in August
Columbia, MD
- Average pressure in August: 29.99"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in August
Columbia, MD
- Average wind speed in August: 5.3mph
The windiest month (with the highest average wind speed) is March (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in August
Columbia, MD
- Average humidity in August: 73%
The months with the highest relative humidity are May and October (77%).
The months with the lowest relative humidity are April and July (72%).
Average rainfall in August
Columbia, MD
- Average rainfall in August: 4.06"
The wettest month (with the highest rainfall) is August (4.06").
The driest month (with the least rainfall) is January (1.85").
Average rainfall days in August
Columbia, MD
- Average rainfall days in August: 17.1 days
The month with the highest number of rainy days is May (18 days).
The month with the least rainy days is January (8.4 days).
Average snowfall in August
Columbia, MD
- Average snowfall in August: 0"
The month with the highest snowfall is March (3.03").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in August
Columbia, MD
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is February (4.6 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in August /
Average sunshine in August
Columbia, MD
- Average daylight in August: 13h and 42min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in August: 10h and 24min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The months with the least sunshine are January and February (Average sunshine: 5h and 6min).
Average sunshine days in August
Columbia, MD
- Average sunshine days in August: 12 days
The month with the most sunshine days is November (19.6 days).
The month with the least sunshine days is May (11 days).
Average UV index in August
Columbia, MD
- Average UV index in August: 6
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in August
Columbia, MD
- Average cloud cover in August: 32
The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 29).
Average visibility in August
Columbia, MD
- Average visibility in August: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
