August weather forecastPortland, MO
August
Weather in August
The last month of the summer, August, is also a moderately hot month in Portland, Missouri, with an average temperature ranging between min 65.7°F (18.7°C) and max 85.6°F (29.8°C).Temperature
Portland notes an average high-temperature of a moderately hot 85.6°F (29.8°C) in August, displaying minor variation from July. August witnesses an average low-temperature hovering around an enjoyable 65.7°F (18.7°C).Heat index
The heat index in August is calculated to be a fiery hot 96.8°F (36°C). More safety actions are required, heat exhaustion and heat cramps are probable. Long-term activity may precipitate heatstroke.One should be cognizant that the heat index values are tailored for shaded spots and mild winds. Facing direct sunlight may hike up the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical activity. One should be aware that direct sunshine can amplify the perceived temperature, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for 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 human body has a built-in cooling mechanism through perspiration; evaporating sweat dissipates the excess heat. In the presence of elevated relative humidity, the evaporation rate decreases. This reduction leads to increased body heat retention compared to conditions of dry air. Heat-related disorders may develop if heat gain in the body overshadows its cooling capacity, leading to elevated temperatures.
Humidity
In Portland, Missouri, the average relative humidity in August is 75%.Rainfall
In Portland, in August, during 13.3 rainfall days, 2.44" (62mm) of precipitation is typically accumulated. In Portland, during the entire year, the rain falls for 139.9 days and collects up to 28.19" (716mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
In August, the average length of the day in Portland, Missouri, is 13h and 38min.On the first day of August, sunrise is at 6:09 am and sunset at 8:17 pm. On the last day of the month, sunrise is at 6:35 am and sunset at 7:38 pm CDT.
Sunshine
In August, the average sunshine is 10.1h.UV index
The months with the highest UV index are June through August, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for the ordinary person.Note: During August, 6 as the daily maximum UV index converts into the following advice:
Adopt measures and apply sun safety strategies. Shielding from skin and eye damage is necessary. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Portland, MO
- Average high temperature in August: 85.6°F
The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (37°F).
- Average low temperature in August: 65.7°F
The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (23°F).
Average pressure in August
Portland, MO
- Average pressure in August: 29.97"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in August
Portland, MO
- Average wind speed in August: 6mph
The windiest month (with the highest average wind speed) is January (9.2mph).
The calmest month (with the lowest average wind speed) is July (5.9mph).
Average humidity in August
Portland, MO
- Average humidity in August: 75%
The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is October (72%).
Average rainfall in August
Portland, MO
- Average rainfall in August: 2.44"
The wettest month (with the highest rainfall) is May (3.58").
The driest month (with the least rainfall) is January (1.34").
Average rainfall days in August
Portland, MO
- Average rainfall days in August: 13.3 days
The month with the highest number of rainy days is May (16.4 days).
The month with the least rainy days is January (6 days).
Average snowfall in August
Portland, MO
- Average snowfall in August: 0"
The month with the highest snowfall is February (2.83").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in August
Portland, MO
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (5.6 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Portland, MO
- Average daylight in August: 13h and 36min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in August: 10h and 6min
The months with the most sunshine are June and July (Average sunshine: 10h and 24min).
The months with the least sunshine are January and February (Average sunshine: 4h and 36min).
Average sunshine days in August
Portland, MO
- Average sunshine days in August: 15.9 days
The month with the most sunshine days is January (20.5 days).
The month with the least sunshine days is May (12.3 days).
Average UV index in August
Portland, MO
- Average UV index in August: 6
The months with the highest UV index are 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
Portland, MO
- Average cloud cover in August: 29
The month with the most cloud cover is February (Cloud cover 50).
The months with the least cloud cover are June, July and August (Cloud cover 29).
Average visibility in August
Portland, MO
- 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).
