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January Weather at Bradley International Airport Connecticut, United States

Daily high temperatures are around 36°F, rarely falling below 21°F or exceeding 50°F. The lowest daily average high temperature is 35°F on January 15.

Daily low temperatures decrease by 3°F, from 22°F to 19°F, rarely falling below 4°F or exceeding 35°F. The lowest daily average low temperature is 19°F on January 29.

For reference, on July 20, the hottest day of the year, temperatures at Bradley International Airport typically range from 65°F to 84°F, while on January 29, the coldest day of the year, they range from 19°F to 35°F.

Average High and Low Temperature in January at Bradley International Airport

Average High and Low Temperature in January at Bradley International AirportJan11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310°F0°F5°F5°F10°F10°F15°F15°F20°F20°F25°F25°F30°F30°F35°F35°F40°F40°F45°F45°F50°F50°F55°F55°F60°F60°FDecFebJan 1535°FJan 1535°F20°F20°FJan 136°FJan 136°F22°F22°FJan 3135°FJan 3135°F19°F19°F
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 hourly average temperatures for the quarter of the year centered on January. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Average Hourly Temperature in January at Bradley International Airport

Average Hourly Temperature in January at Bradley International AirportJan112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMDecFebfreezingfreezingvery 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.

Odessa, Ukraine (4,741 miles away); Dzorastan, Armenia (5,655 miles); and Damāvand, Iran (6,043 miles) are the far-away foreign places with temperatures most similar to Bradley International Airport (view comparison).

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The month of January at Bradley International Airport experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 53% throughout the month. The highest chance of overcast or mostly cloudy conditions is 54% on January 3.

The clearest day of the month is January 25, with clear, mostly clear, or partly cloudy conditions 48% of the time.

For reference, on January 3, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 54%, while on September 5, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 64%.

Cloud Cover Categories in January at Bradley International Airport

Cloud Cover Categories in January at Bradley International AirportJan11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%DecFebSep 564%Sep 564%Jan 146%Jan 146%Jan 3148%Jan 3148%Jan 1146%Jan 1146%Jan 2148%Jan 2148%clearmostly clearpartly cloudymostly 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.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. At Bradley International Airport, the chance of a wet day over the course of January is gradually decreasing, starting the month at 26% and ending it at 22%.

For reference, the year's highest daily chance of a wet day is 37% on May 30, and its lowest chance is 21% on January 29.

Over the course of January at Bradley International Airport, the chance of a day with only rain decreases from 12% to 9%, the chance of a day with mixed snow and rain remains an essentially constant 6% throughout, and the chance of a day with only snow remains an essentially constant 8% throughout.

Probability of Precipitation in January at Bradley International Airport

Probability of Precipitation in January at Bradley International AirportJan11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%0%5%5%10%10%15%15%20%20%25%25%30%30%DecFebJan 2921%Jan 2921%Jan 126%Jan 126%Jan 1125%Jan 1125%Jan 2123%Jan 2123%snowmixedrain
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 month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during January at Bradley International Airport is essentially constant, remaining about 1.8 inches throughout, and rarely exceeding 3.5 inches or falling below 0.2 inches.

The lowest average 31-day accumulation is 1.6 inches on January 24.

Average Monthly Rainfall in January at Bradley International Airport

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 snowfall.

Snowfall

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day snowfall during January at Bradley International Airport is increasing, starting the month at 10.0 inches, when it rarely exceeds 21.5 inches or falls below 1.9 inches, and ending the month at 11.3 inches, when it rarely exceeds 22.0 inches or falls below 2.1 inches.

The highest average 31-day accumulation is 11.5 inches on January 25.

Average Monthly Snowfall in January at Bradley International Airport

Average Monthly Snowfall in January at Bradley International AirportJan11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 in0 in5 in5 in10 in10 in15 in15 in20 in20 in25 in25 inDecFebJan 2511.5 inJan 2511.5 inJan 110.0 inJan 110.0 inJan 1110.8 inJan 1110.8 in
The average 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.

Over the course of January at Bradley International Airport, the length of the day is increasing. From the start to the end of the month, the length of the day increases by 48 minutes, implying an average daily increase of 1 minute, 36 seconds, and weekly increase of 11 minutes, 9 seconds.

The shortest day of the month is January 1, with 9 hours, 11 minutes of daylight and the longest day is January 31, with 9 hours, 59 minutes of daylight.

Hours of Daylight and Twilight in January at Bradley International Airport

Hours of Daylight and Twilight in January at Bradley International AirportJan11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrDecFebnightnightdaydayJan 19 hr, 11 minJan 19 hr, 11 minJan 319 hr, 59 minJan 319 hr, 59 minJan 169 hr, 29 minJan 169 hr, 29 min
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 latest sunrise of the month at Bradley International Airport is 7:18 AM on January 4 and the earliest sunrise is 14 minutes earlier at 7:04 AM on January 31.

The earliest sunset is 4:29 PM on January 1 and the latest sunset is 34 minutes later at 5:03 PM on January 31.

Daylight saving time is observed at Bradley International Airport during 2024, but it neither starts nor ends during January, so the entire month is in daylight saving time.

For reference, on June 20, the longest day of the year, the Sun rises at 5:15 AM and sets 15 hours, 14 minutes later, at 8:29 PM, while on December 21, the shortest day of the year, it rises at 7:15 AM and sets 9 hours, 7 minutes later, at 4:22 PM.

Sunrise & Sunset with Twilight in January at Bradley International Airport

Sunrise & Sunset with Twilight in January at Bradley International AirportJan112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMDecFeb7:04 AM7:04 AMJan 315:03 PMJan 315:03 PM7:18 AM7:18 AMJan 14:29 PMJan 14:29 PM7:17 AM7:17 AMJan 114:39 PMJan 114:39 PM7:13 AM7:13 AMJan 214:51 PMJan 214:51 PMSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day over the course of January. 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 figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

Solar Elevation and Azimuth in January at Bradley International Airport

Solar Elevation and Azimuth in January at Bradley International AirportJan112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMDecFeb001010202020300001010202030
northeastsouthwest
Solar elevation and azimuth over the course of January 2024. The black lines are lines of constant solar elevation (the angle of the sun above the horizon, in degrees). The background color fills indicate the azimuth (the compass bearing) of the sun. The lightly tinted areas at the boundaries of the cardinal compass points indicate the implied intermediate directions (northeast, southeast, southwest, and northwest).

The figure below presents a compact representation of key lunar data for January 2024. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.

Moon Rise, Set & Phases in January at Bradley International Airport

Moon Rise, Set & Phases in January at Bradley International AirportJan112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMDecFebDec 126:33 PMDec 126:33 PMDec 267:34 PMDec 267:34 PMJan 116:58 AMJan 116:58 AMJan 2512:55 PMJan 2512:55 PMFeb 96:00 PMFeb 96:00 PMFeb 247:31 AMFeb 247:31 AM7:01 AM7:01 AM3:46 PM3:46 PM3:48 PM3:48 PM8:13 AM8:13 AM7:51 AM7:51 AM4:44 PM4:44 PM4:45 PM4:45 PM8:03 AM8:03 AM7:05 AM7:05 AM4:56 PM4:56 PM4:45 PM4:45 PM6:55 AM6:55 AM
The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.
Jan 2024IlluminationMoonriseMoonsetMoonriseMeridian PassingDistance
1
75%-10:45 AMWNW10:06 PME3:59 AMS251,574 mi
2
66%-11:04 AMW11:07 PME4:38 AMS251,384 mi
3
50%-11:22 AMW-5:16 AMS250,376 mi
4
47%12:08 AME11:41 AMW-5:55 AMS248,543 mi
5
37%1:10 AMESE12:01 PMWSW-6:37 AMS245,951 mi
6
28%2:16 AMESE12:26 PMWSW-7:21 AMS242,736 mi
7
19%3:26 AMESE12:56 PMWSW-8:11 AMS239,111 mi
8
11%4:38 AMSE1:34 PMSW-9:06 AMS235,354 mi
9
5%5:49 AMSE2:25 PMSW-10:07 AMS231,790 mi
10
1%6:55 AMSE3:28 PMSW-11:12 AMS228,754 mi
11
0%7:51 AMSE4:44 PMSW-12:17 PMS226,536 mi
12
2%8:36 AMESE6:05 PMWSW-1:20 PMS225,323 mi
13
7%9:11 AMESE7:26 PMWSW-2:18 PMS225,163 mi
14
15%9:40 AMESE8:45 PMWSW-3:12 PMS225,974 mi
15
25%10:05 AME10:02 PMW-4:01 PMS227,577 mi
16
36%10:28 AME11:16 PMW-4:49 PMS229,745 mi
17
50%10:50 AME--5:36 PMS232,248 mi
18
59%-12:29 AMWNW11:14 AMENE6:24 PMS234,886 mi
19
70%-1:42 AMWNW11:42 AMENE7:13 PMS237,512 mi
20
79%-2:55 AMWNW12:14 PMENE8:05 PMS240,030 mi
21
87%-4:05 AMNW12:54 PMNE9:00 PMS242,389 mi
22
93%-5:10 AMNW1:42 PMNE9:55 PMS244,568 mi
23
98%-6:08 AMNW2:38 PMNE10:49 PMS246,552 mi
24
100%-6:55 AMNW3:40 PMNE11:40 PMS248,322 mi
25
100%-7:33 AMWNW4:45 PMENE--
26
100%-8:03 AMWNW5:50 PMENE12:29 AMS249,838 mi
27
98%-8:28 AMWNW6:54 PMENE1:14 AMS251,039 mi
28
94%-8:49 AMWNW7:56 PMENE1:55 AMS251,838 mi
29
89%-9:08 AMW8:57 PME2:35 AMS252,139 mi
30
82%-9:26 AMW9:57 PME3:14 AMS251,840 mi
31
74%-9:44 AMW10:58 PMESE3:52 AMS250,857 mi

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.

The chance that a given day will be muggy at Bradley International Airport is essentially constant during January, remaining around 0% throughout.

For reference, on July 29, the muggiest day of the year, there are muggy conditions 37% of the time, while on January 1, the least muggy day of the year, there are muggy conditions 0% of the time.

Humidity Comfort Levels in January at Bradley International Airport

Humidity Comfort Levels in January at Bradley International AirportJan11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%DecFebJan 10%Jan 10%Jan 310%Jan 310%Jan 110%Jan 110%Jan 210%Jan 210%drydry
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.

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 Bradley International Airport is gradually increasing during January, increasing from 5.8 miles per hour to 6.3 miles per hour over the course of the month.

For reference, on February 26, the windiest day of the year, the daily average wind speed is 6.6 miles per hour, while on July 31, the calmest day of the year, the daily average wind speed is 3.6 miles per hour.

Average Wind Speed in January at Bradley International Airport

The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The hourly average wind direction at Bradley International Airport throughout January is predominantly from the west, with a peak proportion of 47% on January 14.

Wind Direction in January at Bradley International Airport

Wind Direction in January at Bradley International AirportJan11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%20%80%40%60%60%40%80%20%100%0%DecFebwestsouthnortheast
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).

Bradley International 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 surface water temperature at Bradley International Airport is decreasing during January, falling by 5°F, from 43°F to 38°F, over the course of the month.

Average Water Temperature in January at Bradley International Airport

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

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 Bradley International Airport typically lasts for 6.0 months (182 days), from around April 17 to around October 16, rarely starting before April 1 or after May 5, and rarely ending before September 29 or after November 3.

The month of January at Bradley International Airport is reliably fully outside of the growing season.

Time Spent in Various Temperature Bands and the Growing Season in January at Bradley International Airport

Time Spent in Various Temperature Bands and the Growing Season in January at Bradley International AirportJan11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%DecFeb0%Jan 160%Jan 160%Feb 60%Feb 6frigidfreezingvery coldcold
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.

The average accumulated growing degree days at Bradley International Airport are essentially constant during January, remaining within 2°F of 2°F throughout.

Growing Degree Days in January at Bradley International Airport

Growing Degree Days in January at Bradley International AirportJan11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310°F0°F1°F1°F2°F2°F3°F3°F4°F4°F5°F5°F6°F6°F7°F7°FDecFebJan 10°FJan 10°FJan 313°FJan 313°FJan 111°FJan 111°FJan 212°FJan 212°F
The average growing degree days accumulated over the course of January, with 25th to 75th and 10th to 90th percentile bands.

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 at Bradley International Airport is gradually increasing during January, rising by 0.7 kWh, from 1.7 kWh to 2.3 kWh, over the course of the month.

Average Daily Incident Shortwave Solar Energy in January at Bradley International Airport

Average Daily Incident Shortwave Solar Energy in January at Bradley International AirportJan11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310.0 kWh0.0 kWh0.5 kWh0.5 kWh1.0 kWh1.0 kWh1.5 kWh1.5 kWh2.0 kWh2.0 kWh2.5 kWh2.5 kWh3.0 kWh3.0 kWh3.5 kWh3.5 kWh4.0 kWh4.0 kWh4.5 kWh4.5 kWh5.0 kWh5.0 kWhDecFebJan 11.7 kWhJan 11.7 kWhJan 312.3 kWhJan 312.3 kWhJan 111.8 kWhJan 111.8 kWhJan 212.0 kWhJan 212.0 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.

For the purposes of this report, the geographical coordinates of Bradley International Airport are 41.938 deg latitude, -72.688 deg longitude, and 180 ft elevation.

The topography within 2 miles of Bradley International Airport contains only modest variations in elevation, with a maximum elevation change of 243 feet and an average elevation above sea level of 166 feet. Within 10 miles contains only modest variations in elevation (1,125 feet). Within 50 miles contains very significant variations in elevation (2,605 feet).

The area within 2 miles of Bradley International Airport is covered by artificial surfaces (57%) and trees (35%), within 10 miles by trees (54%) and artificial surfaces (34%), and within 50 miles by trees (81%) and artificial surfaces (12%).

This report illustrates the typical weather at Bradley International 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

Bradley International 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 Hartford-Brainard Airport, Barnes Municipal Airport, Westover Air Reserve Base / Metropolitan Airport, Meriden Markham Municipal Airport, Windham Airport, Chester Airport, Waterbury-Oxford Airport, and Tweed-New Haven 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 Algorithms 2nd Edition , 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 airports and weather stations are provided by AskGeo.com .

Maps are © OpenStreetMap contributors.

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.

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