August weather forecast
Hillsboro, IA

Share

Weather in August

The last month of the summer, August, is another warm month in Hillsboro, Iowa, with temperature in the range of an average high of 81.7°F (27.6°C) and an average low of 63.3°F (17.4°C).

Temperature

The high-temperature average in August for Hillsboro is a still moderately hot 81.7°F (27.6°C), staying closely aligned with July's conditions. Hillsboro's average low-temperature for the month of August records at a refreshing 63.3°F (17.4°C).

Heat index

The heat index value during August is estimated at a hot 87.8°F (31°C). Prolonged exposure combined with continuous activity could lead to exhaustion, and possibly heat cramps.
In reference to the heat index, it's for places in shade and with a slight wind. Exposure to the direct sun could elevate the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', reflects the blend of air temperature and relative humidity to give a temperature impression. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. Considering the impact of direct sunlight, it's possible for the heat index to surge by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Children frequently do not comprehend the need for rest and hydration. Thirst is an advanced stage of dehydration - staying hydrated, especially during extended physical exercises, is essential.

Humidity

In August, the average relative humidity is 79%.

Rainfall

In Hillsboro, during August, the rain falls for 13.1 days and regularly aggregates up to 2.2" (56mm) of precipitation. In Hillsboro, during the entire year, the rain falls for 140.1 days and collects up to 29.92" (760mm) of precipitation.

Snowfall

In Hillsboro, snow does not fall in May through September.

Daylight

The average length of the day in August is 13h and 45min.
On the first day of August, sunrise is at 6:04 am and sunset at 8:22 pm. On the last day of the month, sunrise is at 6:33 am and sunset at 7:40 pm CDT.

Sunshine

In Hillsboro, the average sunshine in August is 9.9h.

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 risk from exposure to the Sun's UV rays for the average person.
Note: The maximum daily UV index of 6 during August translates into the following directions:
Shield from overexposure. Defense against sun-related harm is required. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. Boost your sun resistance with garments that are densely woven yet spacious.
Updated: Aug 31, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in August?

The high-temperature during August is 81.7°F (27.6°C) and the low-temperature is 63.3°F (17.4°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which combines relative humidity and air temperature, in August is estimated at 87.8°F (31°C).

What is the average humidity in August?

In Hillsboro, the average relative humidity in August is 79%.

How much does it rain in August?

In Hillsboro, in August, during 13.1 rainfall days, 2.2" (56mm) of precipitation is typically accumulated.

When it does not snow?

In Hillsboro, snow does not fall in May through September.

What is the average length of the day in August in Hillsboro?

The average day length in August is 13h and 45min.

When is the sunrise / sunset in August?

In August, on the first day of the month, sunrise is at 6:04 am and sunset at 8:22 pm. On the last day of the month, sunrise is at 6:33 am and sunset at 7:40 pm CDT.

How many hours of sunshine does Hillsboro have in August?

In August, the average sunshine duration is 9.9h.

What is the month with the highest UV index?

The months with the highest UV index are June through August, with an average maximum UV index of 6.

What is the UV index intensity in August?

The average daily maximum UV index in August is 6. A UV Index of 6 to 7 symbolizes a high hazard to health from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Hillsboro, IA

Average temperature in August - Hillsboro, IA
  • Average high temperature in August: 81.7°F

The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (29.7°F).

  • Average low temperature in August: 63.3°F

The month with the highest average low temperature is July (65.3°F).
The coldest month (with the lowest average low temperature) is January (17.4°F).

Average pressure in August
Hillsboro, IA

Average pressure in August - Hillsboro, IA
  • 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 (29.9"Hg).

Average wind speed in August
Hillsboro, IA

Average wind speed in August - Hillsboro, IA
  • Average wind speed in August: 6.9mph

The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (6.9mph).

Average humidity in August
Hillsboro, IA

Average humidity in August - Hillsboro, IA
  • Average humidity in August: 79%

The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (71%).

Average rainfall in August
Hillsboro, IA

Average rainfall in August - Hillsboro, IA
  • Average rainfall in August: 2.2"

The wettest month (with the highest rainfall) is May (4.29").
The driest months (with the least rainfall) are February and December (1.38").

Average rainfall days in August
Hillsboro, IA

Average rainfall days in August - Hillsboro, IA
  • Average rainfall days in August: 13.1 days

The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is February (4.6 days).

Average snowfall in August
Hillsboro, IA

Average snowfall in August - Hillsboro, IA
  • Average snowfall in August: 0"

The month with the highest snowfall is January (4.76").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in August
Hillsboro, IA

Average snowfall days in August - Hillsboro, IA
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (9.6 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
Hillsboro, IA

Average daylight in August / Average sunshine in August - Hillsboro, IA
  • Average daylight in August: 13h and 5min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in August: 9h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).

Average sunshine days in August
Hillsboro, IA

Average sunshine days in August - Hillsboro, IA
  • Average sunshine days in August: 14.8 days

The month with the most sunshine days is October (18.4 days).
The month with the least sunshine days is May (10.6 days).

Average UV index in August
Hillsboro, IA

Average UV index in August - Hillsboro, IA
  • Average UV index in August: 6

The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).

Average cloud cover in August
Hillsboro, IA

Average cloud cover in August - Hillsboro, IA
  • Average cloud cover in August: 31

The month with the most cloud cover is January (Cloud cover 56).
The months with the least cloud cover are July, August and September (Cloud cover 31).

Average visibility in August
Hillsboro, IA

Average visibility in August - Hillsboro, IA
  • Average visibility in August: 6mi

The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).

Hillsboro, Iowa, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location