Average Weather in Big Flats New York, United States
In Big Flats, the summers are warm, the winters are freezing, and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 16°F to 82°F and is rarely below -2°F or above 90°F.
The warm season lasts for 3.7 months, from May 26 to September 17, with an average daily high temperature above 72°F. The hottest day of the year is July 20, with an average high of 82°F and low of 59°F.
The cold season lasts for 3.3 months, from December 1 to March 11, with an average daily high temperature below 42°F. The coldest day of the year is January 29, with an average low of 16°F and high of 32°F.
Average High and Low Temperature
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
In Big Flats, 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 in Big Flats begins around June 1 and lasts for 5.2 months, ending around November 6. On September 2, 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 6 and lasts for 6.8 months, ending around June 1. On January 12, the cloudiest day of the year, the sky is overcast or mostly cloudy 67% of the time, and clear, mostly clear, or partly cloudy 33% of the time.
Cloud Cover Categories
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Big Flats varies throughout the year.
The wetter season lasts 6.1 months, from April 2 to October 5, with a greater than 28% chance of a given day being a wet day. The chance of a wet day peaks at 39% on June 14.
The drier season lasts 5.9 months, from October 5 to April 2. The smallest chance of a wet day is 17% on January 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 39% on June 14.
Daily Chance of Precipitation
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. Big Flats experiences significant seasonal variation in monthly rainfall.
Rain falls throughout the year in Big Flats. The most rain falls during the 31 days centered around June 14, with an average total accumulation of 3.1 inches.
The least rain falls around January 27, with an average total accumulation of 0.9 inches.
Average Monthly Rainfall
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. Big Flats experiences some seasonal variation in monthly liquid-equivalent snowfall.
The snowy period of the year lasts for 5.2 months, from November 8 to April 13, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around February 26, with an average total liquid-equivalent accumulation of 0.7 inches.
The snowless period of the year lasts for 6.8 months, from April 13 to November 8. The least snow falls around July 25, with an average total liquid-equivalent accumulation of 0.0 inches.
Average Liquid-Equivalent Monthly Snowfall
The length of the day in Big Flats varies significantly over the course of the year. In 2017, the shortest day is December 21, with 9 hours, 6 minutes of daylight; the longest day is June 21, with 15 hours, 16 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:31 AM on June 14, and the latest sunrise is 2 hours, 14 minutes later at 7:44 AM on November 4. The earliest sunset is at 4:35 PM on December 8, and the latest sunset is 4 hours, 12 minutes later at 8:47 PM on June 26.
Daylight saving time (DST) is observed in Big Flats 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
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.
Big Flats experiences some seasonal variation in the perceived humidity.
The muggier period of the year lasts for 3.5 months, from June 2 to September 18, during which time the comfort level is muggy, oppressive, or miserable at least 6% of the time. The muggiest day of the year is July 29, with muggy conditions 26% of the time.
The least muggy day of the year is February 17, when muggy conditions are essentially unheard of.
Humidity Comfort Levels
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 in Big Flats experiences significant seasonal variation over the course of the year.
The windier part of the year lasts for 5.1 months, from November 17 to April 22, with average wind speeds of more than 5.6 miles per hour. The windiest day of the year is January 31, with an average hourly wind speed of 7.5 miles per hour.
The calmer time of year lasts for 6.9 months, from April 22 to November 17. The calmest day of the year is August 1, with an average hourly wind speed of 3.7 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Big Flats varies throughout the year.
The wind is most often from the south for 1.6 months, from September 1 to October 19, with a peak percentage of 38% on October 4. The wind is most often from the west for 10 months, from October 19 to September 1, with a peak percentage of 46% on January 1.
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 3 to August 23, with an average daily incident shortwave energy per square meter above 5.8 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 3.4 months, from November 2 to February 14, with an average daily incident shortwave energy per square meter below 2.6 kWh. The darkest day of the year is December 24, with an average of 1.5 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Big Flats are 42.137 deg latitude, -76.937 deg longitude, and 1,079 ft elevation.
The topography within 2 miles of Big Flats contains significant variations in elevation, with a maximum elevation change of 817 feet and an average elevation above sea level of 1,001 feet. Within 10 miles contains significant variations in elevation (1,312 feet). Within 50 miles contains very significant variations in elevation (2,205 feet).
The area within 2 miles of Big Flats is covered by trees (49%), cropland (38%), and artificial surfaces (13%), within 10 miles by trees (71%) and cropland (18%), and within 50 miles by trees (62%) and cropland (33%).
This report illustrates the typical weather in Big Flats, 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
There are 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Big Flats.
For each station, the records are corrected for the elevation difference between that station and Big Flats according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.
The estimated value at Big Flats is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Big Flats and a given station.
The stations contributing to this reconstruction are: Elmira/Corning Regional Airport (97%, 4.4 kilometers, northeast); Wellsville Municipal Airport-Tarantine Field (1.5%, 87 kilometers, west); and Williamsport-Lycoming County Airport (1.3%, 100 kilometers, south).
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.
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.