August weather forecast
Cedar Rapids, IA

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Nice aerial capture of the skyline over Cedar Rapids in Iowa
Nice aerial capture of the skyline over Cedar Rapids in Iowa

Weather in August

August sees a very slight dip in temperature, a subtle indicator of the impending end of summer in Cedar Rapids. While the humidity remains relatively constant compared to July, the rainfall drops to 1.22" (31mm). With these changes, August still offers great weather for outdoor activities. Despite the decline in sunshine hours, the month continues to bask in the warmth of the summer season. Meanwhile, the diminishing wind speed cools down the evenings, easing into the transitional weather of early fall.

Temperature

As July transitions into August, the average high-temperature rests at a still warm 79.5°F (26.4°C), maintaining a close resemblance to the previous month. Throughout the month of August, Cedar Rapids reports a steady low-temperature average of 62.1°F (16.7°C).

Humidity

In Cedar Rapids, the average relative humidity in August is 80%.

Rainfall

In August, the rain falls for 11.9 days. Throughout August, 1.22" (31mm) of precipitation is accumulated. Throughout the year, there are 120.7 rainfall days, and 18.31" (465mm) of precipitation is accumulated.

Snowfall

May through September are months without snowfall.

Daylight

In Cedar Rapids, the average length of the day in August is 13h and 49min.
On the first day of the month, sunrise is at 6:01 am and sunset at 8:24 pm. On the last day of August, sunrise is at 6:32 am and sunset at 7:41 pm CDT.

Sunshine

In Cedar Rapids, the average sunshine in August is 9.9h.

UV index

In August, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for average individuals.
Note: The UV index of 5 during August translates into the following guidance:
Act with care - The suggestion to avoid sunburn is emphasized. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Updated: Jul 21, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average August temperature?

In Cedar Rapids, 79.5°F (26.4°C) is the average high-temperature and 62.1°F (16.7°C) is the average low-temperature during August. In July, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which combines air temperature and relative humidity, is computed to be 86°F (30°C).

What is the average humidity in August?

The average relative humidity in August is 80%.

How much does it rain in August?

In August, the rain falls for 11.9 days. Throughout August, 1.22" (31mm) of precipitation is accumulated.

When it does not snow?

May through September are months without snowfall.

What is the average length of the day in August?

The average day length in August is 13h and 49min.

What time are sunrise and sunset in August?

On the first day of August, sunrise is at 6:01 am and sunset at 8:24 pm. On the last day of the month, sunrise is at 6:32 am and sunset at 7:41 pm CDT.

How many hours of sunshine does Cedar Rapids have in August?

The average sunshine duration in August is 9.9h.

How high is the UV index in August?

The average daily maximum UV index in August is 5. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from unprotected exposure to 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
Cedar Rapids, IA

Average temperature in August - Cedar Rapids, IA
  • Average high temperature in August: 79.5°F

The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (26.2°F).

  • Average low temperature in August: 62.1°F

The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (14.2°F).

Average pressure in August
Cedar Rapids, IA

Average pressure in August - Cedar Rapids, IA
  • Average pressure in August: 29.97"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

Average wind speed in August
Cedar Rapids, IA

Average wind speed in August - Cedar Rapids, IA
  • Average wind speed in August: 7mph

The windiest months (with the highest average wind speed) are January and April (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).

Average humidity in August
Cedar Rapids, IA

Average humidity in August - Cedar Rapids, IA
  • Average humidity in August: 80%

The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is October (73%).

Average rainfall in August
Cedar Rapids, IA

Average rainfall in August - Cedar Rapids, IA
  • Average rainfall in August: 1.22"

The wettest month (with the highest rainfall) is May (3.07").
The driest months (with the least rainfall) are January and February (0.63").

Average rainfall days in August
Cedar Rapids, IA

Average rainfall days in August - Cedar Rapids, IA
  • Average rainfall days in August: 11.9 days

The month with the highest number of rainy days is May (16 days).
The month with the least rainy days is February (3 days).

Average snowfall in August
Cedar Rapids, IA

Average snowfall in August - Cedar Rapids, IA
  • Average snowfall in August: 0"

The month with the highest snowfall is January (2.64").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in August
Cedar Rapids, IA

Average snowfall days in August - Cedar Rapids, IA
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (10.3 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
Cedar Rapids, IA

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

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • 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 6min).

Average sunshine days in August
Cedar Rapids, IA

Average sunshine days in August - Cedar Rapids, IA
  • Average sunshine days in August: 17 days

The month with the most sunshine days is October (19.9 days).
The month with the least sunshine days is June (11.8 days).

Average UV index in August
Cedar Rapids, IA

Average UV index in August - Cedar Rapids, IA
  • Average UV index in August: 5

The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).

Average cloud cover in August
Cedar Rapids, IA

Average cloud cover in August - Cedar Rapids, IA
  • Average cloud cover in August: 30

The month with the most cloud cover is January (Cloud cover 57).
The months with the least cloud cover are August and September (Cloud cover 30).

Average visibility in August
Cedar Rapids, IA

Average visibility in August - Cedar Rapids, 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).

Cedar Rapids, Iowa, USA

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