Des Moines, Iowa experiences a continental climate, characterized by hot summers and cold winters.
The hottest month of the year is July, with average high temperatures around 86°F and lows near 68°F. This makes it an ideal time for outdoor activities.
The cold season lasts for three months, from November to February, with daily high temperatures below 43°F.
Rainfall in Des Moines averages 36 inches per year, while snowfall typically reaches 33 inches annually.
January is the month with the most snowfall, seeing about 8.7 days of snow and accumulating up to 2.24 inches.
These weather conditions provide a mix of seasonal experiences for residents and visitors alike.
Des Moines also enjoys varying daylight and sunshine hours throughout the year, enhancing its diverse climate experience.
Whether you are planning a visit or looking to move, understanding the climate of Des Moines can help you prepare for what to expect year-round.
Average Temperature In Des Moines, Iowa
Des Moines experiences varying temperatures throughout the year.
The hottest month is July, with an average high of 86°F and a low of 68°F. This makes it the warmest period of the year.
In contrast, January is the coldest month, with an average low of 17°F and a high of 33°F. The city sees its coldest temperatures during this time.
The cold season lasts roughly from late November to the end of February. During this period, the average high remains below 43°F, causing a significant drop in warmth.
| Month | Avg. High (°F) | Avg. Low (°F) |
|---|---|---|
| January | 33 | 17 |
| July | 86 | 68 |
These fluctuations ensure residents experience a mix of hot and cold, as temperatures swing between extremes.
The average cold season in Des Moines includes consistent freezing temperatures, especially from December through February.
Average Precipitation In Des Moines, Iowa
Des Moines experiences varied precipitation throughout the year, with significant differences between rainfall and snowfall.
Average Rainfall In Des Moines, Iowa
Rainfall in Des Moines, Iowa, varies by season.
The city receives its highest rainfall during the late spring and summer months. In May, average rainfall reaches about 4.5 inches.
June is also quite wet, with an average of 4.4 inches of rain.
July and August see slightly less rain but still get a fair amount, averaging around 4 inches each.
Rainfall continues to decrease in the fall. By October, the average precipitation drops to around 2.5 inches.
Winter months, particularly December, have the lowest rainfall, averaging less than 1.5 inches.
Average Snow In Des Moines, Iowa
Snowfall in Des Moines mostly occurs from late fall to early spring.
January is typically the snowiest month, with about 10 inches of snow on average. February follows closely with an average snowfall of 8 inches.
March still sees some snow, with around 5 inches. Snowfall decreases dramatically by April, averaging less than 1 inch.
December also contributes to winter’s snowfall, with an average of 7 inches. Snow and ice are common during these months, affecting daily life and transportation.
Average Sun In Des Moines, Iowa
Des Moines, Iowa, experiences varying amounts of sunshine throughout the year. Key details include average daily solar energy and how daylight hours change with the seasons.
Average Daily Shortwave Solar Energy In Des Moines, Iowa
The amount of shortwave solar energy received each day varies significantly.
During summer, the city experiences more sunshine, resulting in longer days and higher energy levels. In June, the average sunlight can reach up to 6.8 kWh per square meter per day.
In contrast, winter days are shorter with lower energy levels. December often sees averages around 2.3 kWh per square meter per day.
Here is a summary:
- Summer: Up to 6.8 kWh/m²/day
- Winter: Around 2.3 kWh/m²/day
This data reflects the typical sun exposure residents and visitors in Des Moines can expect throughout the year. For more information, see the details here.
Average Humidity In Des Moines, Iowa
Des Moines experiences a range of humidity levels throughout the year.
The most humid month is January, with an average relative humidity of 72.0%. This can make the cold winter feel even frostier.
On the other hand, May is the least humid month, with an average relative humidity of 60.0%. This lower humidity level can make springtime more comfortable for outdoor activities.
The average annual humidity in Des Moines is round 67%.
Monthly Average Humidity Levels:
| Month | Average Humidity |
|---|---|
| January | 72.0% |
| February | – |
| March | – |
| April | – |
| May | 60.0% |
| June | – |
| July | – |
| August | – |
| September | – |
| October | – |
| November | – |
| December | – |
For those curious about real-time weather, current conditions can be checked at Weather & Climate Des Moines.
Average Wind In Des Moines, Iowa
The wind in Des Moines, Iowa varies throughout the year.
The highest average wind speed is in April, reaching around 11.8 mph.
In contrast, the calmest month is August, with an average wind speed of 7.6 mph.
| Month | Average Wind Speed (mph) |
|---|---|
| January | 10.2 |
| February | 10.0 |
| March | 11.2 |
| April | 11.8 |
| May | 11.0 |
| June | 10.0 |
| July | 8.5 |
| August | 7.6 |
| September | 8.5 |
| October | 9.5 |
| November | 10.8 |
| December | 10.5 |
Winter months experience slightly higher wind speeds compared to the summer months. You can find more related details on wind speed.
Average Air Quality In Des Moines, Iowa
Des Moines, Iowa generally enjoys good air quality throughout the year.
The city’s Air Quality Index (AQI) often falls in the “Good” category, indicating that air pollution poses little or no risk to health.
According to IQAir, key spots in Des Moines show consistent air quality readings.
For example, locations like Evelyn Davis Park and Carpenter frequently report low levels of particulate matter (PM2.5), which is a common air pollutant.
Key Air Quality Indicators:
- PM2.5 Levels: These are commonly low in Des Moines, contributing to better overall air quality.
- Nitrogen Dioxide (NO2): As reported by NASA, monthly averages for NO2 also remain low in Des Moines.
Factors Affecting Air Quality:
- Weather Conditions: Wind and rain can significantly improve air quality by dispersing pollutants.
- Seasonal Changes: Air quality can fluctuate with seasonal changes, especially during wildfires in nearby regions or during heavy use of heating systems in winter.
With AccuWeather forecasting real-time air quality conditions, residents can easily plan outdoor activities and make better health decisions.
Visibility:
Visibility in Des Moines is generally good, as clear air contributes to less obstruction in sight distance.
On rare occasions, when particulate matter increases, visibility may slightly decrease.
Topography Of Des Moines, Iowa
Des Moines, the capital city of Iowa, sits in Polk County and extends into Warren County. The geographical coordinates are approximately 41.6005° N latitude and 93.6091° W longitude.
The city covers an area that rises gradually in elevation, reflecting the rolling hills of the region.
Elevation and Altitude
- Average Elevation: About 955 feet above sea level
- Highest Point: Near 970 feet
- Lowest Point: Approximately 850 feet
Geographic Features
The landscape includes the Des Moines River, which flows through the city providing a central waterway.
The terrain is characterized by gentle slopes that create a visually varied ground.
Des Moines’ Zip Codes:
- Common zip codes include 50309, 50310, 50312, and 50321.
Nearby Elevations:
- Hawkeye Point: The highest elevation in Iowa at 1,670 feet, located in Osceola County.
- Mississippi River: Iowa’s lowest elevation at 480 feet above sea level.
Mapping Information
The USGS topographic map offers detailed views, and the Des Moines topographic map includes elevation specifics and terrain details.
The landscape influences various local climate patterns and watersheds, illustrating how terrain shapes the natural experiences of Des Moines residents.
Extreme Weather Events That Occur In Des Moines, Iowa
Des Moines experiences a range of extreme weather events throughout the year.
Tornadoes are a significant threat, especially during spring and early summer.
The Des Moines area has faced numerous tornadoes, with an event in July 2024 causing substantial damage due to downed trees and power lines.
Derechos, or widespread windstorms, also impact Des Moines.
The December 15, 2021 derecho was historic, as it was the first of its kind in December and brought numerous tornadoes.
Severe thunderstorms are common, bringing heavy rain, lightning, and hail.
A recent severe storm in Des Moines caused significant damage, including large hailstones measuring between 1 and 2.5 inches in diameter.
Winter storms can lead to blizzards and icy conditions, particularly in January, the coldest month.
Heavy snowfalls and extreme cold can disrupt daily life.
Heatwaves occur during July, the hottest month, with temperatures frequently exceeding 90°F.
Strong winds are frequent in April, often making it the windiest month.
High wind speeds can lead to hazardous conditions and property damage.
Best Time Of The Year To Visit Des Moines, Iowa
Des Moines, Iowa, offers different experiences depending on the season. This guide explores what to expect and enjoy during each part of the year.
What Is Des Moines, Iowa Like In Spring
Spring in Des Moines starts in March and goes through May.
The weather can be a bit unpredictable, with temperatures ranging from 40°F to 70°F.
Early spring sees occasional snow, but it quickly melts as temperatures rise.
Rain is common, with April being the wettest month, averaging about 3.4 inches.
This season is perfect for visiting parks and trails as flowers bloom and trees turn green.
Festivals like the Downtown Farmers’ Market start in May, adding lively events to the city.
It’s a time when outdoor activities become more enjoyable as the cold temperatures fade away.
What Is Des Moines, Iowa Like In Summer
Summer in Des Moines spans from June through August, featuring warm weather and long days.
Temperatures average between 68°F and 86°F, with July being the hottest month.
Warm temperatures make it a great time for outdoor festivals, concerts, and farmers’ markets.
Rainfall ranges from 3 to 4 inches per month, providing enough moisture to keep gardens and parks lush.
Adventureland Park, the local amusement park, and Gray’s Lake Park are popular spots for family fun.
The Des Moines Arts Festival, held in late June, draws tourists and locals alike.
What Is Des Moines, Iowa Like In Fall
Fall, from September to November, brings cooler temperatures back to Des Moines.
Temperatures range from 45°F to 70°F.
September still holds onto the warmth of summer, making early fall a great time for outdoor activities.
Rainfall averages 2 to 3 inches per month.
The color changes in late September and October offer scenic beauty, making it a prime time for hiking and photography.
Events like the World Food & Music Festival and the Iowa State Fair provide cultural experiences.
It’s also harvest time, making farmers’ markets vibrant and full of fresh produce.
What Is Des Moines, Iowa Like In Winter
Winter in Des Moines is cold, running from December through February.
Temperatures often stay below freezing, with highs averaging around 34°F and lows dipping to 17.6°F.
Snow is common, and December sees an average of 8 inches of snowfall.
Downtown Des Moines lights up with festive decorations and events such as the Holiday Light Tour.
Indoor attractions like the Science Center of Iowa and the Des Moines Art Center become more popular.
Though the weather can be harsh, winter sports enthusiasts can enjoy ice skating and other snowy activities.