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Average Weather at Creston Municipal Airport Iowa, United States

At Creston Municipal Airport, the summers are warm, humid, and wet; the winters are freezing, dry, and windy; and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 16°F to 86°F and is rarely below -3°F or above 95°F.

Based on the tourism score, the best time of year to visit Creston Municipal Airport for warm-weather activities is from early June to mid September.

Climate Summary

very coldcoldcoolwarmhotwarmcoolcoldvery coldJanFebMarAprMayJunJulAugSepOctNovDec71%71%46%46%clearovercastprecipitation: 4.5 inprecipitation: 4.5 in0.6 in0.6 inmuggy: 55%muggy: 55%0%0%drydrytourism score: 6.6tourism score: 6.60.00.0
Click on each chart for more information.

Temperature

The hot season lasts for 3.7 months, from May 27 to September 18, with an average daily high temperature above 75°F. The hottest day of the year is July 20, with an average high of 86°F and low of 67°F.

The cold season lasts for 3.0 months, from November 28 to February 28, with an average daily high temperature below 43°F. The coldest day of the year is January 6, with an average low of 16°F and high of 33°F.

Average High and Low Temperature

The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Average Hourly Temperature

Average Hourly Temperature at Creston Municipal AirportJanFebMarAprMayJunJulAugSepOctNovDec12 AM4 AM8 AM12 PM4 PM8 PM12 AMfreezingfreezingcoldcoldcoolcoolcomfortablewarmvery coldvery cold
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Çalxanqala, Azerbaijan (6,332 miles away); Bishkek, Kyrgyzstan (6,607 miles); and Yanggu, South Korea (6,359 miles) are the far-away foreign places with temperatures most similar to Creston Municipal Airport (view comparison).

Clouds

At Creston Municipal Airport, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.

The clearer part of the year at Creston Municipal Airport begins around June 9 and lasts for 4.5 months, ending around October 26. On August 26, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 71% of the time, and overcast or mostly cloudy 29% of the time.

The cloudier part of the year begins around October 26 and lasts for 7.5 months, ending around June 9. On February 12, the cloudiest day of the year, the sky is overcast or mostly cloudy 54% of the time, and clear, mostly clear, or partly cloudy 46% of the time.

Cloud Cover Categories

Cloud Cover Categories at Creston Municipal AirportclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Aug 2671%Aug 2671%Feb 1246%Feb 1246%Jun 958%Jun 958%Oct 2659%Oct 2659%clearmostly clearpartly cloudyovercast
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days at Creston Municipal Airport varies significantly throughout the year.

The wetter season lasts 5.7 months, from April 6 to September 26, with a greater than 26% chance of a given day being a wet day. The chance of a wet day peaks at 44% on June 7.

The drier season lasts 6.3 months, from September 26 to April 6. The smallest chance of a wet day is 8% on January 12.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation at Creston Municipal Airport changes throughout the year.

Rain alone is the most common for 10 months, from February 16 to December 20. The highest chance of a day with rain alone is 44% on June 7.

Snow alone is the most common for 1.9 months, from December 20 to February 16. The highest chance of a day with snow alone is 6% on February 8.

Daily Chance of Precipitation

Daily Chance of Precipitation at Creston Municipal AirportsnowrainJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Jun 744%Jun 744%Jan 128%Jan 128%Dec 2011%Dec 2011%Apr 626%Apr 626%Sep 2626%Sep 2626%rainsnowmixed
The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).

Rainfall

To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Creston Municipal Airport experiences extreme seasonal variation in monthly rainfall.

The rainy period of the year lasts for 10 months, from February 14 to December 25, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around June 14, with an average total accumulation of 4.5 inches.

The rainless period of the year lasts for 1.6 months, from December 25 to February 14. The least rain falls around January 20, with an average total accumulation of 0.2 inches.

Average Monthly Rainfall

Average Monthly Rainfall at Creston Municipal AirportrainJanFebMarAprMayJunJulAugSepOctNovDec0 in2 in4 in6 in8 inJun 144.5 inJun 144.5 inJan 200.2 inJan 200.2 inDec 250.5 inDec 250.5 in
The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average liquid-equivalent snowfall.

Snowfall

We report snowfall in liquid-equivalent terms. The actual depth of new snowfall is typically between 5 and 10 times the liquid-equivalent amount, assuming the ground is frozen. Colder, drier snow tends to be on the higher end of that range and warmer, wetter snow on the lower end.

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. Creston Municipal Airport experiences some seasonal variation in monthly liquid-equivalent snowfall.

The snowy period of the year lasts for 4.6 months, from November 9 to March 27, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around December 17, with an average total liquid-equivalent accumulation of 0.4 inches.

The snowless period of the year lasts for 7.4 months, from March 27 to November 9. The least snow falls around July 21, with an average total liquid-equivalent accumulation of 0.0 inches.

Average Liquid-Equivalent Monthly Snowfall

Average Liquid-Equivalent Monthly Snowfall at Creston Municipal AirportsnowsnowJanFebMarAprMayJunJulAugSepOctNovDec0 in1 in2 in3 in4 in5 inDec 170.4 inDec 170.4 inJul 210.0 inJul 210.0 inJan 310.3 inJan 310.3 inNov 90.1 inNov 90.1 inMar 270.1 inMar 270.1 in
The average liquid-equivalent snowfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average rainfall.

Sun

The length of the day at Creston Municipal Airport varies significantly over the course of the year. In 2018, the shortest day is December 21, with 9 hours, 13 minutes of daylight; the longest day is June 21, with 15 hours, 8 minutes of daylight.

Hours of Daylight and Twilight

Hours of Daylight and Twilight at Creston Municipal AirportJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 6 minMar 2012 hr, 6 minMar 2015 hr, 8 minJun 2115 hr, 8 minJun 2112 hr, 10 minSep 2212 hr, 10 minSep 229 hr, 13 minDec 219 hr, 13 minDec 21nightnightday
The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The earliest sunrise is at 5:44 AM on June 14, and the latest sunrise is 2 hours, 6 minutes later at 7:50 AM on November 3. The earliest sunset is at 4:48 PM on December 8, and the latest sunset is 4 hours, 5 minutes later at 8:53 PM on June 27.

Daylight saving time (DST) is observed at Creston Municipal Airport during 2018, starting in the spring on March 11, lasting 7.8 months, and ending in the fall on November 4.

Sunrise & Sunset with Twilight and Daylight Saving Time

Sunrise & Sunset with Twilight and Daylight Saving Time at Creston Municipal AirportJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 145:44 AMJun 145:44 AM8:53 PMJun 278:53 PMJun 27Dec 84:48 PMDec 84:48 PM7:50 AMNov 37:50 AMNov 3Mar 11DSTMar 11DSTDSTNov 4DSTNov 4daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day over the course of the year 2018. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray. The transitions to and from daylight saving time are indicated by the 'DST' labels.

Humidity

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

Creston Municipal Airport experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 3.6 months, from May 29 to September 18, during which time the comfort level is muggy, oppressive, or miserable at least 14% of the time. The muggiest day of the year is July 22, with muggy conditions 55% of the time.

The least muggy day of the year is February 10, when muggy conditions are essentially unheard of.

Humidity Comfort Levels

Humidity Comfort Levels at Creston Municipal AirportmuggyJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Feb 100%Feb 100%Jul 2255%Jul 2255%May 2914%May 2914%Sep 1814%Sep 1814%muggymuggydrydryoppressiveoppressivecomfortablecomfortablemiserablemiserable
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.

Wind

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed at Creston Municipal Airport experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 8.0 months, from September 28 to May 27, with average wind speeds of more than 10.6 miles per hour. The windiest day of the year is April 1, with an average hourly wind speed of 13.0 miles per hour.

The calmer time of year lasts for 4.0 months, from May 27 to September 28. The calmest day of the year is August 7, with an average hourly wind speed of 8.2 miles per hour.

Average Wind Speed

Average Wind Speed at Creston Municipal AirportwindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph2 mph4 mph6 mph8 mph10 mph12 mph14 mph16 mph18 mph20 mphApr 113.0 mphApr 113.0 mphAug 78.2 mphAug 78.2 mphSep 2810.6 mphSep 2810.6 mphMay 2710.6 mphMay 2710.6 mph
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The predominant average hourly wind direction at Creston Municipal Airport varies throughout the year.

The wind is most often from the south for 8.1 months, from April 7 to December 10, with a peak percentage of 48% on July 5. The wind is most often from the west for 6.0 days, from December 10 to December 16, with a peak percentage of 30% on December 13. The wind is most often from the north for 3.7 months, from December 16 to April 7, with a peak percentage of 33% on January 1.

Wind Direction

Wind Direction at Creston Municipal AirportNSNJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%westsouthnortheast
northeastsouthwest
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than 1.0 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Best Time of Year to Visit

To characterize how pleasant the weather is at Creston Municipal Airport throughout the year, we compute two travel scores.

The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best time of year to visit Creston Municipal Airport for general outdoor tourist activities is from early June to mid September, with a peak score in the last week of August.

Tourism Score

Tourism Score at Creston Municipal Airportbest timeJanFebMarAprMayJunJulAugSepOctNovDec02468106.66.60.00.0 precipitationprecipitationcloudscloudstemperaturetemperaturetourism score
The tourism score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit Creston Municipal Airport for hot-weather activities is from late June to mid August, with a peak score in the third week of July.

Beach/Pool Score

Beach/Pool Score at Creston Municipal Airportbest timeJanFebMarAprMayJunJulAugSepOctNovDec02468105.55.50.00.0 precipitationprecipitationcloudscloudstemperaturetemperaturebeach/pool score
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

Methodology

For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.

Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.

Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.

Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.

Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.

Growing Season

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

The growing season at Creston Municipal Airport typically lasts for 5.9 months (179 days), from around April 17 to around October 13, rarely starting before April 1 or after May 3, and rarely ending before September 23 or after November 3.

Time Spent in Various Temperature Bands and the Growing Season

Time Spent in Various Temperature Bands and the Growing Season at Creston Municipal Airportgrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Apr 1750%Apr 1750%Oct 1350%Oct 1350%May 390%May 390%Sep 2390%Sep 2390%Apr 110%Apr 110%Nov 310%Nov 310%0%Feb 80%Feb 8Jul 13100%Jul 13100%freezingvery coldcoolcomfortablewarmhotcold
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The percentage of time spent in various temperature bands. The black line is the percentage chance that a given day is within the growing season.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

Based on growing degree days alone, the first spring blooms at Creston Municipal Airport should appear around April 6, only rarely appearing before March 24 or after April 25.

Growing Degree Days

Growing Degree Days at Creston Municipal AirportJanFebMarAprMayJunJulAugSepOctNovDec0°F500°F1,000°F1,500°F2,000°F2,500°F3,000°F3,500°FApr 689°FApr 689°FJun 16900°FJun 16900°FJul 241,800°FJul 241,800°FDec 313,386°FDec 313,386°F
The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands.

Solar Energy

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy experiences extreme seasonal variation over the course of the year.

The brighter period of the year lasts for 3.7 months, from May 2 to August 24, with an average daily incident shortwave energy per square meter above 6.0 kWh. The brightest day of the year is July 3, with an average of 7.0 kWh.

The darker period of the year lasts for 3.2 months, from November 2 to February 10, with an average daily incident shortwave energy per square meter below 2.9 kWh. The darkest day of the year is December 21, with an average of 1.9 kWh.

Average Daily Incident Shortwave Solar Energy

Average Daily Incident Shortwave Solar Energy at Creston Municipal AirportbrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh1 kWh2 kWh3 kWh4 kWh5 kWh6 kWh7 kWh8 kWh9 kWhJul 37.0 kWhJul 37.0 kWhDec 211.9 kWhDec 211.9 kWhMay 26.0 kWhMay 26.0 kWhAug 246.0 kWhAug 246.0 kWhFeb 102.9 kWhFeb 102.9 kWh
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

Topography

For the purposes of this report, the geographical coordinates of Creston Municipal Airport are 41.021 deg latitude, -94.363 deg longitude, and 1,270 ft elevation.

The topography within 2 miles of Creston Municipal Airport contains only modest variations in elevation, with a maximum elevation change of 108 feet and an average elevation above sea level of 1,264 feet. Within 10 miles also contains only modest variations in elevation (299 feet). Within 50 miles contains only modest variations in elevation (722 feet).

The area within 2 miles of Creston Municipal Airport is covered by cropland (95%), within 10 miles by cropland (94%), and within 50 miles by cropland (90%).

Data Sources

This report illustrates the typical weather at Creston Municipal Airport, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

Temperature and Dew Point

Creston Municipal Airport has a weather station that reported reliably enough during the analysis period that we have included it in our network. When available, historical temperature and dew point measurements are taken directly from this weather station. These records are obtained from NOAA's Integrated Surface Hourly data set, falling back on ICAO METAR records as required.

In the case of missing or erroneous measurements from this station, we fall back on records from nearby stations, adjusted according to typical seasonal and diurnal intra-station differences. For a given day of the year and hour of the day, the fallback station is selected to minimize the prediction error over the years for which there are measurements for both stations.

The stations on which we may fall back include but are not limited to Lamoni Municipal Airport, Osceola Municipal Airport, Schenck Field Airport, Atlantic Municipal Airport, Perry Municipal Airport, Des Moines International Airport, Audubon County Airport, and Red Oak Municipal Airport.

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , by Jean Meeus.

All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.

Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.

Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.

Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .

Time zones for aiports and weather stations are provided by AskGeo.com .

Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.

Disclaimer

The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.

We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.