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Fall Weather in Hereclean Romania

Daily high temperatures decrease by 34°F, from 74°F to 41°F, rarely falling below 30°F or exceeding 85°F.

Daily low temperatures decrease by 23°F, from 53°F to 30°F, rarely falling below 19°F or exceeding 60°F.

For reference, on August 1, the hottest day of the year, temperatures in Hereclean typically range from 59°F to 80°F, while on January 21, the coldest day of the year, they range from 24°F to 34°F.

Average High and Low Temperature in the Fall in Hereclean

Average High and Low Temperature in the Fall in HerecleanSepOctNov10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°FSummerWinterSep 174°FSep 174°F53°F53°FNov 3041°FNov 3041°F30°F30°FOct 165°FOct 165°F46°F46°FNov 152°FNov 152°F37°F37°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 fall temperatures. 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 the Fall in Hereclean

Average Hourly Temperature in the Fall in HerecleanSepOctNov12 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 AMSummerWinterfreezingfreezingvery coldcoldcoolcomfortablewarmcomfortable
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.

Rainelle, West Virginia, United States (4,916 miles away) is the far-away foreign place with temperatures most similar to Hereclean (view comparison).

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The fall in Hereclean experiences very rapidly increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 37% to 59%.

The clearest day of the fall is September 1, with clear, mostly clear, or partly cloudy conditions 63% of the time.

For reference, on December 27, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 61%, while on August 1, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 73%.

Cloud Cover Categories in the Fall in Hereclean

Cloud Cover Categories in the Fall in HerecleanSepOctNov0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%SummerWinterSep 163%Sep 163%Nov 3041%Nov 3041%Oct 155%Oct 155%Nov 149%Nov 149%clearmostly clearpartly cloudyovercastmostly cloudy
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. In Hereclean, the chance of a wet day over the course of the fall is gradually decreasing, starting the season at 21% and ending it at 18%.

For reference, the year's highest daily chance of a wet day is 36% on June 10, and its lowest chance is 14% on March 1.

Over the course of the fall in Hereclean, the chance of a day with only rain decreases from 21% to 16%, the chance of a day with mixed snow and rain remains an essentially constant 1% throughout, and the chance of a day with only snow remains an essentially constant 1% throughout.

Probability of Precipitation in the Fall in Hereclean

Probability of Precipitation in the Fall in HerecleanSepOctNov0%0%5%5%10%10%15%15%20%20%25%25%30%30%SummerWinterSep 121%Sep 121%Nov 3018%Nov 3018%Oct 121%Oct 121%Nov 119%Nov 119%snowrainmixed
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 season and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during the fall in Hereclean is decreasing, starting the season at 1.6 inches, when it rarely exceeds 2.9 inches or falls below 0.5 inches, and ending the season at 1.0 inches, when it rarely exceeds 2.1 inches or falls below 0.3 inches.

Average Monthly Rainfall in the Fall in Hereclean

Average Monthly Rainfall in the Fall in HerecleanSepOctNov0.0 in0.0 in0.5 in0.5 in1.0 in1.0 in1.5 in1.5 in2.0 in2.0 in2.5 in2.5 in3.0 in3.0 in3.5 in3.5 in4.0 in4.0 inSummerWinterSep 11.6 inSep 11.6 inNov 301.0 inNov 301.0 inOct 11.5 inOct 11.5 inNov 11.3 inNov 11.3 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 snowfall.

Over the course of the fall in Hereclean, the length of the day is very rapidly decreasing. From the start to the end of the season, the length of the day decreases by 4 hours, 33 minutes, implying an average daily decrease of 3 minutes, 2 seconds, and weekly decrease of 21 minutes, 13 seconds.

The shortest day of the fall is November 30, with 8 hours, 47 minutes of daylight and the longest day is September 1, with 13 hours, 20 minutes of daylight.

Hours of Daylight and Twilight in the Fall in Hereclean

Hours of Daylight and Twilight in the Fall in HerecleanSepOctNov0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrSummerWinterSep 2212 hr, 10 minSep 2212 hr, 10 minnightnightdaydayNov 308 hr, 47 minNov 308 hr, 47 minNov 19 hr, 59 minNov 19 hr, 59 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 earliest sunrise of the fall in Hereclean is 6:47 AM on September 1 and the latest sunrise is 1 hour, 15 minutes later at 8:02 AM on October 26.

The latest sunset is 8:07 PM on September 1 and the earliest sunset is 3 hours, 27 minutes earlier at 4:40 PM on November 30.

Daylight saving time (DST) starts at 3:00 AM on October 27, 2024, shifting sunrise and sunset to be an hour later.

For reference, on June 20, the longest day of the year, the Sun rises at 5:31 AM and sets 15 hours, 56 minutes later, at 9:27 PM, while on December 21, the shortest day of the year, it rises at 8:11 AM and sets 8 hours, 28 minutes later, at 4:40 PM.

Sunrise & Sunset with Twilight and Daylight Saving Time in the Fall in Hereclean

Sunrise & Sunset with Twilight and Daylight Saving Time in the Fall in HerecleanSepOctNov2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMSummerWinter6:47 AM6:47 AMSep 18:07 PMSep 18:07 PM7:52 AM7:52 AMNov 304:40 PMNov 304:40 PM8:02 AM8:02 AMOct 266:20 PMOct 266:20 PM7:27 AM7:27 AMOct 17:06 PMOct 17:06 PMDSTOct 27DSTOct 27SolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day in the fall. 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.

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 the Fall in Hereclean

Solar Elevation and Azimuth in the Fall in HerecleanSepOctNov12 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 AMSummerWinter0020300010103040
northeastsouthwest
Solar elevation and azimuth in the the fall of 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 the fall of 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 the Fall in Hereclean

Moon Rise, Set & Phases in the Fall in HerecleanSepOctNov12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMSummerWinterAug 42:14 PMAug 42:14 PMAug 199:26 PMAug 199:26 PMSep 34:56 AMSep 34:56 AMSep 185:35 AMSep 185:35 AMOct 29:50 PMOct 29:50 PMOct 172:27 PMOct 172:27 PMNov 12:48 PMNov 12:48 PMNov 1511:29 PMNov 1511:29 PMDec 18:22 AMDec 18:22 AMDec 1511:02 AMDec 1511:02 AMDec 3112:28 AMDec 3112:28 AM9:24 PM9:24 PM8:45 PM8:45 PM6:58 AM6:58 AM6:54 AM6:54 AM8:21 PM8:21 PM7:27 PM7:27 PM7:17 AM7:17 AM6:56 AM6:56 AM6:56 PM6:56 PM6:25 PM6:25 PM9:04 AM9:04 AM4:50 PM4:50 PM4:13 PM4:13 PM8:25 AM8:25 AM8:23 AM8:23 AM8:18 AM8:18 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.

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 in Hereclean is essentially constant during the fall, remaining within 1% of 1% throughout.

For reference, on July 28, the muggiest day of the year, there are muggy conditions 10% of the time, while on October 12, the least muggy day of the year, there are muggy conditions 0% of the time.

Humidity Comfort Levels in the Fall in Hereclean

Humidity Comfort Levels in the Fall in HerecleanSepOctNov0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%SummerWinterSep 11%Sep 11%Nov 300%Nov 300%Oct 10%Oct 10%Nov 10%Nov 10%humidhumidcomfortablecomfortabledrydrymuggymuggy
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 in Hereclean is gradually increasing during the fall, increasing from 6.5 miles per hour to 7.0 miles per hour over the course of the season.

For reference, on March 10, the windiest day of the year, the daily average wind speed is 8.1 miles per hour, while on August 10, the calmest day of the year, the daily average wind speed is 5.8 miles per hour.

The highest daily average wind speed during the fall is 7.1 miles per hour on November 16.

Average Wind Speed in the Fall in Hereclean

Average Wind Speed in the Fall in HerecleanSepOctNov0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mphSummerWinterNov 167.1 mphNov 167.1 mphSep 16.5 mphSep 16.5 mphOct 16.6 mphOct 16.6 mphNov 16.8 mphNov 16.8 mph
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The wind direction in Hereclean during the fall is predominantly out of the west from September 1 to September 25 and the south from September 25 to November 30.

Wind Direction in the Fall in Hereclean

Wind Direction in the Fall in HerecleanWSSepOctNov0%100%20%80%40%60%60%40%80%20%100%0%SummerWinterwestsouthnortheast
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).

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 in Hereclean typically lasts for 6.4 months (195 days), from around April 8 to around October 20, rarely starting before March 14 or after April 30, and rarely ending before October 1 or after November 8.

During the fall in Hereclean, the chance that a given day is within the growing season is very rapidly decreasing falling from 100% to -0% over the course of the season.

Time Spent in Various Temperature Bands and the Growing Season in the Fall in Hereclean

Time Spent in Various Temperature Bands and the Growing Season in the Fall in Herecleangrowing seasonSepOctNov0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%SummerWinter100%Sep 1100%Sep 1Nov 30-0%Nov 30-0%90%Oct 190%Oct 1Nov 121%Nov 121%Sep 8100%Sep 8100%freezingvery coldcoldcoolcomfortablewarmhotfrigid
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 in Hereclean are increasing during the fall, increasing by 446°F, from 2,070°F to 2,516°F, over the course of the season.

Growing Degree Days in the Fall in Hereclean

Growing Degree Days in the Fall in HerecleanSepOctNov1,800°F1,800°F2,000°F2,000°F2,200°F2,200°F2,400°F2,400°F2,600°F2,600°F2,800°F2,800°FSummerWinterSep 12,070°FSep 12,070°FNov 302,516°FNov 302,516°FOct 12,372°FOct 12,372°FNov 12,493°FNov 12,493°F
The average growing degree days accumulated over the course of the fall, 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 in Hereclean is very rapidly decreasing during the fall, falling by 3.8 kWh, from 5.0 kWh to 1.3 kWh, over the course of the season.

Average Daily Incident Shortwave Solar Energy in the Fall in Hereclean

Average Daily Incident Shortwave Solar Energy in the Fall in HerecleanSepOctNov0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWhSummerWinterSep 15.0 kWhSep 15.0 kWhNov 301.3 kWhNov 301.3 kWhOct 13.5 kWhOct 13.5 kWhNov 12.1 kWhNov 12.1 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 Hereclean are 47.250 deg latitude, 23.017 deg longitude, and 886 ft elevation.

The topography within 2 miles of Hereclean contains significant variations in elevation, with a maximum elevation change of 564 feet and an average elevation above sea level of 841 feet. Within 10 miles contains significant variations in elevation (2,310 feet). Within 50 miles contains large variations in elevation (5,682 feet).

The area within 2 miles of Hereclean is covered by cropland (66%) and grassland (20%), within 10 miles by cropland (52%) and trees (25%), and within 50 miles by cropland (41%) and trees (35%).

This report illustrates the typical weather in Hereclean, 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 4 weather stations near enough to contribute to our estimation of the temperature and dew point in Hereclean.

For each station, the records are corrected for the elevation difference between that station and Hereclean 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 Hereclean is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Hereclean and a given station.

The stations contributing to this reconstruction are:

To get a sense of how much these sources agree with each other, you can view a comparison of Hereclean and the stations that contribute to our estimates of its temperature history and climate. Please note that each source's contribution is adjusted for elevation and the relative change present in the MERRA-2 data.

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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