May Weather in Bistreț RomaniaDaily high temperatures increase by 8°F, from 71°F to 79°F, rarely falling below 60°F or exceeding 88°F. Daily low temperatures increase by 8°F, from 51°F to 58°F, rarely falling below 44°F or exceeding 64°F. For reference, on July 29, the hottest day of the year, temperatures in Bistreț typically range from 65°F to 88°F, while on January 19, the coldest day of the year, they range from 26°F to 38°F. Average High and Low Temperature in May in Bistreț
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 May. 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 May in Bistreț
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.
Cincinnati, United States (5,160 miles away) is the far-away foreign place with temperatures most similar to Bistreț (view comparison). CloudsThe month of May in Bistreț experiences gradually decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 46% to 38%. The clearest day of the month is May 31, with clear, mostly clear, or partly cloudy conditions 62% of the time. For reference, on November 29, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 58%, while on July 19, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 86%. Cloud Cover Categories in May in Bistreț
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.
PrecipitationA wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Bistreț, the chance of a wet day over the course of May is increasing, starting the month at 23% and ending it at 28%. For reference, the year's highest daily chance of a wet day is 28% on June 3, and its lowest chance is 12% on January 23. RainfallTo 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 May in Bistreț is gradually increasing, starting the month at 1.5 inches, when it rarely exceeds 2.8 inches or falls below 0.5 inches, and ending the month at 1.9 inches, when it rarely exceeds 3.5 inches or falls below 0.8 inches. Average Monthly Rainfall in May in Bistreț
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.
SunOver the course of May in Bistreț, the length of the day is rapidly increasing. From the start to the end of the month, the length of the day increases by 1 hour, 2 minutes, implying an average daily increase of 2 minutes, 4 seconds, and weekly increase of 14 minutes, 31 seconds. The shortest day of the month is May 1, with 14 hours, 12 minutes of daylight and the longest day is May 31, with 15 hours, 14 minutes of daylight. Hours of Daylight and Twilight in May in Bistreț
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 in Bistreț is 6:17 AM on May 1 and the earliest sunrise is 31 minutes earlier at 5:46 AM on May 31. The earliest sunset is 8:29 PM on May 1 and the latest sunset is 32 minutes later at 9:01 PM on May 31. Daylight saving time is observed in Bistreț during 2024, but it neither starts nor ends during May, so the entire month is in standard time. For reference, on June 20, the longest day of the year, the Sun rises at 5:43 AM and sets 15 hours, 29 minutes later, at 9:11 PM, while on December 21, the shortest day of the year, it rises at 7:57 AM and sets 8 hours, 54 minutes later, at 4:51 PM. Sunrise & Sunset with Twilight in May in Bistreț
The solar day over the course of May. 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 May in Bistreț
northeastsouthwest
Solar elevation and azimuth over the course of May 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).
MoonThe figure below presents a compact representation of key lunar data for May 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 May in Bistreț
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.
HumidityWe 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 Bistreț is gradually increasing during May, rising from 0% to 4% over the course of the month. For reference, on July 28, the muggiest day of the year, there are muggy conditions 19% of the time, while on October 24, the least muggy day of the year, there are muggy conditions 0% of the time. WindThis 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 Bistreț is gradually decreasing during May, decreasing from 7.3 miles per hour to 6.8 miles per hour over the course of the month. For reference, on March 7, the windiest day of the year, the daily average wind speed is 8.8 miles per hour, while on August 11, the calmest day of the year, the daily average wind speed is 6.4 miles per hour. The lowest daily average wind speed during May is 6.8 miles per hour on May 29. The wind direction in Bistreț during May is predominantly out of the east from May 1 to May 14 and the west from May 14 to May 31. Wind Direction in May in Bistreț
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).
Growing SeasonDefinitions 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 Bistreț typically lasts for 7.4 months (226 days), from around March 22 to around November 2, rarely starting before February 29 or after April 9, and rarely ending before October 17 or after November 22. The month of May in Bistreț is reliably fully within the growing season. Time Spent in Various Temperature Bands and the Growing Season in May in Bistreț
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 Bistreț are rapidly increasing during May, increasing by 457°F, from 341°F to 798°F, over the course of the month. Solar EnergyThis 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 Bistreț is gradually increasing during May, rising by 0.8 kWh, from 5.8 kWh to 6.6 kWh, over the course of the month. TopographyFor the purposes of this report, the geographical coordinates of Bistreț are 43.900 deg latitude, 23.500 deg longitude, and 115 ft elevation. The topography within 2 miles of Bistreț is essentially flat, with a maximum elevation change of 75 feet and an average elevation above sea level of 107 feet. Within 10 miles is essentially flat (509 feet). Within 50 miles contains significant variations in elevation (5,066 feet). The area within 2 miles of Bistreț is covered by cropland (61%) and artificial surfaces (16%), within 10 miles by cropland (68%), and within 50 miles by cropland (70%) and trees (16%). Data SourcesThis report illustrates the typical weather in Bistreț, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016. Temperature and Dew PointThere are 4 weather stations near enough to contribute to our estimation of the temperature and dew point in Bistreț. For each station, the records are corrected for the elevation difference between that station and Bistreț 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 Bistreț is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Bistreț 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 Bistreț 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 DataAll 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. DisclaimerThe 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. Please review our full terms contained on our Terms of Service page. |