Contents
- Weather in August
- Frequently asked questions
- Average temperature in August
- Average pressure in August
- Average wind speed in August
- Average humidity in August
- Average rainfall in August
- Average rainfall days in August
- Average snowfall in August
- Average snowfall days in August
- Average daylight in August
- Average sunshine in August
- Average sunshine days in August
- Average UV index in August
- Average cloud cover in August
- Average visibility in August
Weather in August
Temperature
The warmest month is August, with an average high-temperature of 98.2°F (36.8°C) and an average low-temperature of 79.7°F (26.5°C).Heat index
For August, the heat index is calculated to be a life-threatening hot 122°F (50°C). Beware: Heat cramps and heat exhaustion are very likely. Heatstroke is imminent with prolonged activity.Note that heat index values are valued for light wind and location in the shade. When exposed to the direct sun, the heat index may augment by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', gives an indication of how one might feel in terms of heat after considering humidity. The individual's impression of temperature can be shaped by additional aspects such as metabolic variations, physical activity, and clothing. Taking into account that direct sunlight can boost the heat effect, the heat index may rise by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Children typically face more danger than adults as their sweat production is usually lower. Additionally, the bigger skin surface compared to their small size and the increased heat due to their activeness exacerbate the risk.
The evaporation of sweat is a natural cooling mechanism of the human body, facilitated by perspiration. When the level of relative humidity is elevated, evaporation diminishes, causing more warmth to be retained in the body than in dry air. When the body is unable to balance heat gain, its temperature elevates, which may induce thermal illnesses.
Humidity
August is the least humid month, with an average relative humidity of 59%.Rainfall
In August, the rain falls for 6.9 days. Throughout August, 0.71" (18mm) of precipitation is accumulated. Throughout the year, in San Juan, there are 94.1 rainfall days, and 9.06" (230mm) of precipitation is accumulated.Snowfall
In San Juan, Texas, snow does not fall in February through December.Daylight
In San Juan, the average length of the day in August is 13h and 2min.On the first day of the month, sunrise is at 6:58 am and sunset at 8:19 pm. On the last day of August, in San Juan, Texas, sunrise is at 7:12 am and sunset at 7:52 pm CDT.
Sunshine
The average sunshine in August in San Juan is 9.8h.UV index
The months with the highest UV index are July and August, with an average maximum UV index of 8. A UV Index of 8 to 10 symbolizes a very high health vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: The maximum daily UV index of 8 in August interprets into the following recommendations:
Immediate precautions are necessary; otherwise, skin and eyes might get damaged quickly. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Frequently asked questions
What month is the hottest in San Juan?
How hot does it get in San Juan in August?
What is the least humid month in San Juan?
What is the average humidity in August in San Juan?
How much does it rain in San Juan in August?
When it does not snow in San Juan?
What is the average length of the day in August in San Juan?
When are sunrise and sunset in August in San Juan?
How long on average sun shines in August in San Juan?
What is the month with the highest UV index in San Juan?
How high is the UV index in August in San Juan?
Average temperature in August
San Juan, TX
- Average high temperature in August: 98.2°F
The warmest month (with the highest average high temperature) is August (98.2°F).
The month with the lowest average high temperature is January (69.6°F).
- Average low temperature in August: 79.7°F
The month with the highest average low temperature is August (79.7°F).
The coldest month (with the lowest average low temperature) is January (53.4°F).
Average pressure in August
San Juan, TX
- Average pressure in August: 29.9"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The months with the lowest atmospheric pressure are May and June (29.87"Hg).
Average wind speed in August
San Juan, TX
- Average wind speed in August: 10.9mph
The windiest month (with the highest average wind speed) is May (12.4mph).
The calmest month (with the lowest average wind speed) is September (8.9mph).
Average humidity in August
San Juan, TX
- Average humidity in August: 59%
The month with the highest relative humidity is May (69%).
The month with the lowest relative humidity is August (59%).
Average rainfall in August
San Juan, TX
- Average rainfall in August: 0.71"
The wettest month (with the highest rainfall) is September (1.46").
The driest months (with the least rainfall) are January and February (0.31").
Average rainfall days in August
San Juan, TX
- Average rainfall days in August: 6.9 days
The month with the highest number of rainy days is September (15.1 days).
The month with the least rainy days is February (5.4 days).
Average snowfall in August
San Juan, TX
- Average snowfall in August: 0"
The month with the highest snowfall is January (0.12").
The months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in August
San Juan, TX
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (0.1 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in August /
Average sunshine in August
San Juan, TX
- Average daylight in August: 13h and 0min
The month with the longest days is June (Average daylight: 13h and 48min).
The month with the shortest days is December (Average daylight: 10h and 30min).
- Average sunshine in August: 9h and 5min
The month with the most sunshine is July (Average sunshine: 11h and 24min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
Average sunshine days in August
San Juan, TX
- Average sunshine days in August: 22.9 days
The month with the most sunshine days is July (23 days).
The month with the least sunshine days is September (12.5 days).
Average UV index in August
San Juan, TX
- Average UV index in August: 8
The months with the highest UV index are July and August (UV index 8).
The month with the lowest UV index is December (UV index 4).
Average cloud cover in August
San Juan, TX
- Average cloud cover in August: 18
The month with the most cloud cover is December (Cloud cover 39).
The month with the least cloud cover is August (Cloud cover 18).
Average visibility in August
San Juan, TX
- 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).
San Juan, Texas, USA
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