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Average Weather at Igor I Sikorsky Memorial Airport Connecticut, United States

At Igor I Sikorsky Memorial Airport, the summers are warm and humid; the winters are very cold, wet, and windy; and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 24°F to 82°F and is rarely below 11°F or above 89°F.

Climate Summary

very coldcoldcoolwarmcoolcoldJanFebMarAprMayJunJulAugSepOctNovDec65%65%48%48%clearovercastprecipitation: 3.9 inprecipitation: 3.9 in2.9 in2.9 inmuggy: 55%muggy: 55%0%0%drydrytourism score: 7.1tourism score: 7.10.00.0
Click on each chart for more information.

Based on the tourism score, the best time of year to visit Igor I Sikorsky Memorial Airport for warm-weather activities is from mid June to late September.

Temperature

The warm season lasts for 3.4 months, from June 4 to September 18, with an average daily high temperature above 73°F. The hottest day of the year is July 21, with an average high of 82°F and low of 68°F.

The cold season lasts for 3.3 months, from December 5 to March 14, with an average daily high temperature below 46°F. The coldest day of the year is January 29, with an average low of 24°F and high of 37°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 Igor I Sikorsky Memorial AirportJanFebMarAprMayJunJulAugSepOctNovDec12 AM4 AM8 AM12 PM4 PM8 PM12 AMfreezingvery coldvery coldcoldcoldcoolcoolcomfortablewarmfreezingfreezing
The average hourly temperature, color coded into bands: 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 shaded overlays indicate night and civil twilight.

Ullubiyaul, Russia (5,583 miles away) and Tendō, Japan (6,558 miles) are the far-away foreign places with temperatures most similar to Igor I Sikorsky Memorial Airport (view comparison).

Clouds

At Igor I Sikorsky Memorial Airport, the average percentage of the sky covered by clouds experiences mild seasonal variation over the course of the year.

The clearer part of the year at Igor I Sikorsky Memorial Airport begins around June 27 and lasts for 4.5 months, ending around November 13. On September 23, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 65% of the time, and overcast or mostly cloudy 35% of the time.

The cloudier part of the year begins around November 13 and lasts for 7.5 months, ending around June 27. On February 28, the cloudiest day of the year, the sky is overcast or mostly cloudy 52% of the time, and clear, mostly clear, or partly cloudy 48% of the time.

Cloud Cover Categories

Cloud Cover Categories at Igor I Sikorsky Memorial AirportclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Sep 2365%Sep 2365%Feb 2848%Feb 2848%Jun 2756%Jun 2756%Nov 1356%Nov 1356%clearmostly clearpartly cloudymostly cloudyovercast
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds: clear < 20% < mostly clear < 40% < partly cloudy < 60% < mostly cloudy < 80% < overcast.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days at Igor I Sikorsky Memorial Airport varies throughout the year.

The wetter season lasts 8.2 months, from December 11 to August 18, with a greater than 28% chance of a given day being a wet day. The chance of a wet day peaks at 34% on August 3.

The drier season lasts 3.8 months, from August 18 to December 11. The smallest chance of a wet day is 23% on October 28.

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 throughout the year is rain alone, with a peak probability of 34% on August 3.

Daily Chance of Precipitation

Daily Chance of Precipitation at Igor I Sikorsky Memorial AirportwetwetdryJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Aug 334%Aug 334%Oct 2823%Oct 2823%Jan 127%Jan 127%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. Igor I Sikorsky Memorial Airport experiences some seasonal variation in monthly rainfall.

Rain falls throughout the year at Igor I Sikorsky Memorial Airport. The most rain falls during the 31 days centered around June 4, with an average total accumulation of 3.9 inches.

The least rain falls around January 29, with an average total accumulation of 2.1 inches.

Average Monthly Rainfall

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. Igor I Sikorsky Memorial Airport experiences some seasonal variation in monthly liquid-equivalent snowfall.

The snowy period of the year lasts for 4.5 months, from November 21 to April 5, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around January 24, with an average total liquid-equivalent accumulation of 0.7 inches.

The snowless period of the year lasts for 7.5 months, from April 5 to November 21. The least snow falls around July 27, with an average total liquid-equivalent accumulation of 0.0 inches.

Average Liquid-Equivalent Monthly Snowfall

Average Liquid-Equivalent Monthly Snowfall at Igor I Sikorsky Memorial AirportsnowsnowJanFebMarAprMayJunJulAugSepOctNovDec0.0 in0.5 in1.0 in1.5 in2.0 in2.5 in3.0 in3.5 in4.0 inJan 240.7 inJan 240.7 inJul 270.0 inJul 270.0 inNov 210.1 inNov 210.1 inApr 50.1 inApr 50.1 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 Igor I Sikorsky Memorial Airport varies significantly over the course of the year. In 2017, the shortest day is December 21, with 9 hours, 12 minutes of daylight; the longest day is June 21, with 15 hours, 9 minutes of daylight.

Hours of Daylight and Twilight

Hours of Daylight and Twilight at Igor I Sikorsky Memorial AirportJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 7 minMar 2012 hr, 7 minMar 2015 hr, 9 minJun 2115 hr, 9 minJun 2112 hr, 9 minSep 2212 hr, 9 minSep 229 hr, 12 minDec 219 hr, 12 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 5:19 AM on June 14, and the latest sunrise is 2 hours, 8 minutes later at 7:27 AM on November 4. The earliest sunset is at 4:23 PM on December 6, and the latest sunset is 4 hours, 6 minutes later at 8:29 PM on June 27.

Daylight saving time (DST) is observed at Igor I Sikorsky Memorial Airport during 2017, starting in the spring on March 12, lasting 7.8 months, and ending in the fall on November 5.

Sunrise & Sunset with Twilight and Daylight Saving Time

Sunrise & Sunset with Twilight and Daylight Saving Time at Igor I Sikorsky Memorial AirportJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 145:19 AMJun 145:19 AM8:29 PMJun 278:29 PMJun 27Dec 64:23 PMDec 64:23 PM7:27 AMNov 47:27 AMNov 4Mar 12DSTMar 12DSTDSTNov 5DSTNov 5daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day over the course of the year 2017. 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.

Igor I Sikorsky Memorial Airport experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 3.5 months, from June 11 to September 26, during which time the comfort level is muggy, oppressive, or miserable at least 14% of the time. The muggiest day of the year is August 2, with muggy conditions 55% of the time.

The least muggy day of the year is February 23, when muggy conditions are essentially unheard of.

Humidity Comfort Levels

Humidity Comfort Levels at Igor I Sikorsky Memorial AirportmuggyJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Feb 230%Feb 230%Aug 255%Aug 255%Jun 1114%Jun 1114%Sep 2614%Sep 2614%oppressiveoppressivemuggymuggydrydrycomfortablecomfortable
The percentage of time spent at various humidity comfort levels, categorized by dew point: dry < 55°F < comfortable < 60°F < humid < 65°F < muggy < 70°F < oppressive < 75°F < miserable.

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 Igor I Sikorsky Memorial Airport experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 6.2 months, from October 13 to April 19, with average wind speeds of more than 7.9 miles per hour. The windiest day of the year is January 13, with an average hourly wind speed of 10.1 miles per hour.

The calmer time of year lasts for 5.8 months, from April 19 to October 13. The calmest day of the year is August 1, with an average hourly wind speed of 5.8 miles per hour.

Average Wind Speed

Average Wind Speed at Igor I Sikorsky Memorial AirportwindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph2 mph4 mph6 mph8 mph10 mph12 mph14 mph16 mphJan 1310.1 mphJan 1310.1 mphAug 15.8 mphAug 15.8 mphOct 137.9 mphOct 137.9 mphApr 197.9 mphApr 197.9 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 Igor I Sikorsky Memorial Airport varies throughout the year.

The wind is most often from the north for 1.0 months, from March 9 to April 10, with a peak percentage of 34% on March 11. The wind is most often from the west for 3.3 weeks, from April 10 to May 3 and for 5.3 months, from October 1 to March 9, with a peak percentage of 30% on April 19. The wind is most often from the south for 4.9 months, from May 3 to October 1, with a peak percentage of 39% on July 28.

Wind Direction

Wind Direction at Igor I Sikorsky Memorial AirportWNWSWJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%westsouthnortheast
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions (north, east, south, and west), excluding hours in which the mean wind speed is less than 1 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Water Temperature

Igor I Sikorsky Memorial Airport is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.

The average water temperature experiences significant seasonal variation over the course of the year.

The time of year with warmer water lasts for 3.5 months, from June 24 to October 10, with an average temperature above 65°F. The day of the year with the warmest water is August 12, with an average temperature of 72°F.

The time of year with cooler water lasts for 3.5 months, from December 31 to April 14, with an average temperature below 44°F. The day of the year with the coolest water is February 21, with an average temperature of 37°F.

Average Water Temperature

The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

Best Time of Year to Visit

To characterize how pleasant the weather is at Igor I Sikorsky Memorial 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 Igor I Sikorsky Memorial Airport for general outdoor tourist activities is from mid June to late September, with a peak score in the last week of August.

Tourism Score

Tourism Score at Igor I Sikorsky Memorial Airportbest timeJanFebMarAprMayJunJulAugSepOctNovDec02468107.17.10.00.06.96.9 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 Igor I Sikorsky Memorial Airport for hot-weather activities is from early July to late August, with a peak score in the last week of July.

Beach/Pool Score

Beach/Pool Score at Igor I Sikorsky Memorial Airportbest timeJanFebMarAprMayJunJulAugSepOctNovDec02468106.36.30.00.0 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 Igor I Sikorsky Memorial Airport typically lasts for 7.0 months (215 days), from around April 5 to around November 6, rarely starting before March 19 or after April 22, and rarely ending before October 19 or after November 22.

Time Spent in Various Temperature Bands and the Growing Season

Time Spent in Various Temperature Bands and the Growing Season at Igor I Sikorsky Memorial Airportgrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Apr 550%Apr 550%Nov 650%Nov 690%Apr 2290%Apr 2290%Oct 1990%Oct 1910%Mar 1910%Mar 1910%Nov 2210%Nov 220%Dec 190%Dec 19Jul 17100%Jul 17100%freezingvery coldcomfortablewarmcoldcoolfrigidhot
The percentage of time spent in various temperature bands: 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 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 Igor I Sikorsky Memorial Airport should appear around April 26, only rarely appearing before April 15 or after May 6.

Growing Degree Days

Growing Degree Days at Igor I Sikorsky Memorial AirportJanFebMarAprMayJunJulAugSepOctNovDec0°F500°F1,000°F1,500°F2,000°F2,500°F3,000°F3,500°FApr 2688°FApr 2688°FJun 29900°FJun 29900°FAug 51,800°FAug 51,800°FDec 313,222°FDec 313,222°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 3.6 months, from May 1 to August 20, with an average daily incident shortwave energy per square meter above 5.9 kWh. The brightest day of the year is June 30, with an average of 6.9 kWh.

The darker period of the year lasts for 3.2 months, from November 5 to February 11, with an average daily incident shortwave energy per square meter below 2.8 kWh. The darkest day of the year is December 23, with an average of 1.7 kWh.

Average Daily Incident Shortwave Solar Energy

Average Daily Incident Shortwave Solar Energy at Igor I Sikorsky Memorial AirportbrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh1 kWh2 kWh3 kWh4 kWh5 kWh6 kWh7 kWh8 kWh9 kWhJun 306.9 kWhJun 306.9 kWhDec 231.7 kWhDec 231.7 kWhMay 15.9 kWhMay 15.9 kWhAug 205.9 kWhAug 205.9 kWhNov 52.8 kWhNov 52.8 kWhFeb 112.8 kWhFeb 112.8 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 Igor I Sikorsky Memorial Airport are 41.163 deg latitude, -73.126 deg longitude, and 0 ft elevation.

The topography within 2 miles of Igor I Sikorsky Memorial Airport is essentially flat, with a maximum elevation change of 66 feet and an average elevation above sea level of 6 feet. Within 10 miles is essentially flat (591 feet). Within 50 miles contains significant variations in elevation (1,660 feet).

The area within 2 miles of Igor I Sikorsky Memorial Airport is covered by water (48%) and artificial surfaces (45%), within 10 miles by water (56%) and artificial surfaces (30%), and within 50 miles by trees (40%) and water (34%).

Data Sources

This report illustrates the typical weather at Igor I Sikorsky Memorial 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

Igor I Sikorsky Memorial 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 Tweed-New Haven Airport, Waterbury-Oxford Airport, Long Island Mac Arthur Airport, Danbury Municipal Airport, Brookhaven Airport, Meriden Markham Municipal Airport, Republic Airport, and Westchester County 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.