Cedar Rapids, IA weather in August
Expect warm, often humid weather with some rain in Cedar Rapids in August, with highs near 83°F and lows near 61°F. Rain falls on about 10 days. It is one of the warmest months in Cedar Rapids.
- Normal high
- 83°F
- Normal low
- 61°F
- Wet days
- 10
- 4.4 in total
- Muggy days
- 14
- dew point 65°F+
How August changes from start to finish
| August 1 | August 31 | |
|---|---|---|
| Normal high | 85°F | 82°F |
| Normal low | 63°F | 58°F |
| Chance of a wet day | 31% | 30% |
| Sunrise / sunset | 6:00 am / 8:25 pm | 6:31 am / 7:42 pm |
| Daylight | 14.4 h | 13.2 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Central Time).
A typical August day
- 6 am63°Fdew point 61°F
- 9 am72°Fdew point 64°F
- Noon78°Fdew point 64°F
- 3 pm80°Fdew point 64°F
- 6 pm77°Fdew point 65°F
- 9 pm69°Fdew point 64°F
NOAA hourly normals (local standard time) from Cedar Rapids Muni Airport (9 mi away); average wind 7 mph; clear or few clouds in 64% of daytime hours, mostly cloudy or overcast in 23%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F6 of 31
- Hot dayshigh 90°F or more4 of 31
- Muggy daysdaily mean dew point 65°F or more14 of 31
- Wet daysat least 0.01 in of rain or melted snow10 of 31
- Notable rainat least 0.10 in6 of 31
- Freezing nightslow 32°F or below0 of 31
- Snow on the groundsnow depth 1 in or more0 of 31
Average days per August, counted from daily records for each year 1991-2020.
Rain in August
Normal precipitation is 4.4 in; a dry August brings about 2.7 in and a wet one about 5.5 in (25th and 75th percentiles). About 3 days bring half an inch or more, and about 1 an inch or more.
How August varies from year to year
- Warmest August, 1991-20201995: average high 89°F
- Coolest August2004: average high 78°F
- Wettest August2009: 13.0 in
- Driest August1995: 1.0 in
- Highest reading99°F (August 30, 2013)
- Lowest reading43°F (August 31, 2009)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
August compared with July and September
| July | August | September | |
|---|---|---|---|
| Normal high | 86°F | 83°F | 77°F |
| Normal low | 63°F | 61°F | 53°F |
| Wet days | 10 | 10 | 9 |
| Comfortable days | 4 | 6 | 14 |
| Daylight | 14.9 h | 13.8 h | 12.5 h |
Highs change by -3°F from July and -6°F into September.
Nearby alternatives in August
- Cooler: Rochester, MN145 mi · high 78°F · 10 wet days
How Cedar Rapids ranks in August
- Normal high242nd warmest of 378 cities; 3rd of 3 in Iowa
- Wet days233rd driest of 378
- Comfortable days117th most of 341
What to pack for Cedar Rapids in August
- A rain jacket or umbrella – rain on about 10 days
Heating and cooling
August has 8 heating degree days and 234 cooling degree days (base 65°F), 3% of the year's total heating and cooling demand.
Questions
How hot is Cedar Rapids in August?
The normal high is 83°F and the normal low is 61°F. From 1991 to 2020 the hottest August reading was 99°F (August 30, 2013).
Does it rain a lot in Cedar Rapids in August?
About 10 days in August have at least 0.01 in of precipitation, and the normal total is 4.4 in. The wettest August in 1991-2020 was in 2009 (13.0 in); the driest was in 1995 (1.0 in).
Is August a good time to visit Cedar Rapids?
August ranks 6th of 12 months on our comfort score for Cedar Rapids (57 out of 100). It has about 6 comfortable days and about 4 days at 90°F or hotter. The best month is May.
Where the numbers come from
- Temperature, rain, snowfall, snow depth and frost dates: Cedar Rapids #1 (USC00131319), 4.0 mi NE of the city center, 813 ft . NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour and cloud cover: Cedar Rapids Muni Airport (USW00014990), 9.4 mi SSW of the city center, 868 ft (60 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Eastern Iowa Regional Airport (725450-14990), 9.6 mi SSW of the city center, 840 ft . Hourly observations, 1991-2020.