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
August in Hannibal welcomes an average high-temperature of a still warm 83.8°F (28.8°C), not much different from the preceding month. In August, the average low-temperature is a comfortable 64.9°F (18.3°C).Heat index
August's average heat index is calculated to be a tropical 93.2°F (34°C). Ensure additional precautions, heat exhaustion and heat cramps may be expected. Heatstroke could occur from sustained activity.Note that heat index values are valued for light wind and location in the shade. Uninterrupted exposure to the sun may boost the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', is a metric representing the sensation of warmth when air temperature and moisture come together. The influence of weather is personal, with a diverse population experiencing it differently due to differences in body mass, stature, and degree of activity. When in direct sunlight, one should be cautious as it can raise the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance 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.
Humidity
The average relative humidity in August is 77%.Rainfall
In Hannibal, in August, it is raining for 12.4 days, with typically 2.36" (60mm) of accumulated precipitation. Throughout the year, there are 136 rainfall days, and 25" (635mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall.Daylight
In August, the average length of the day is 13h and 41min.On the first day of the month, sunrise is at 6:05 am and sunset at 8:18 pm. On the last day of August, sunrise is at 6:33 am and sunset at 7:37 pm CDT.
Sunshine
In Hannibal, the average sunshine in August is 10.1h.UV index
June through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for the average person.Note: The maximum daily UV index of 6 in August converts into the following recommendations:
Enforce precautions and stick to sun safety measures. Preservation from skin and eye damage is essential. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in August?
What is the average humidity in August?
How much does it rain in Hannibal in August?
When it does not snow?
How many hours of daylight does Hannibal have in August?
When are sunrise and sunset in August?
How many hours of sunshine does Hannibal have in August?
What is the month with the highest UV index?
How high is the UV index in August?
Average temperature in August
Hannibal, MO
- Average high temperature in August: 83.8°F
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (34°F).
- Average low temperature in August: 64.9°F
The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure in August
Hannibal, MO
- Average pressure in August: 29.97"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in August
Hannibal, MO
- Average wind speed in August: 6.3mph
The windiest months (with the highest average wind speed) are January, February and April (9.9mph).
The calmest month (with the lowest average wind speed) is July (6.2mph).
Average humidity in August
Hannibal, MO
- Average humidity in August: 77%
The months with the highest relative humidity are May, June and July (80%).
The month with the lowest relative humidity is October (70%).
Average rainfall in August
Hannibal, MO
- Average rainfall in August: 2.36"
The wettest month (with the highest rainfall) is May (3.39").
The driest month (with the least rainfall) is January (1.14").
Average rainfall days in August
Hannibal, MO
- Average rainfall days in August: 12.4 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (5.3 days).
Average snowfall in August
Hannibal, MO
- Average snowfall in August: 0"
The month with the highest snowfall is January (3.31").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in August
Hannibal, MO
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (6.2 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
Hannibal, MO
- Average daylight in August: 13h and 4min
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 24min).
- Average sunshine in August: 10h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days in August
Hannibal, MO
- Average sunshine days in August: 16 days
The month with the most sunshine days is December (20.3 days).
The month with the least sunshine days is June (11.6 days).
Average UV index in August
Hannibal, 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
Hannibal, MO
- Average cloud cover in August: 28
The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is July (Cloud cover 27).
Average visibility in August
Hannibal, 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).
Hannibal, Missouri, USA
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