Climate and Average Weather Year Round in Pervomays’k Ukraine

In Pervomays’k, the summers are warm and partly cloudy and the winters are freezing, snowy, mostly cloudy, and windy. Over the course of the year, the temperature typically varies from 20°F to 82°F and is rarely below 4°F or above 92°F.

Based on the tourism score, the best time of year to visit Pervomays’k for warm-weather activities is from early June to early September.

The warm season lasts for 3.6 months, from May 23 to September 11, with an average daily high temperature above 72°F. The hottest month of the year in Pervomays’k is July, with an average high of 81°F and low of 62°F.

The cold season lasts for 3.6 months, from November 21 to March 9, with an average daily high temperature below 41°F. The coldest month of the year in Pervomays’k is January, with an average low of 21°F and high of 31°F.

In Pervomays’k, 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 Pervomays’k begins around May 1 and lasts for 5.1 months, ending around October 3.

The clearest month of the year in Pervomays’k is July, during which on average the sky is clear, mostly clear, or partly cloudy 73% of the time.

The cloudier part of the year begins around October 3 and lasts for 6.9 months, ending around May 1.

The cloudiest month of the year in Pervomays’k is January, during which on average the sky is overcast or mostly cloudy 66% of the time.

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A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Pervomays’k varies throughout the year.

The wetter season lasts 2.2 months, from May 13 to July 20, with a greater than 21% chance of a given day being a wet day. The month with the most wet days in Pervomays’k is June, with an average of 8.6 days with at least 0.04 inches of precipitation.

The drier season lasts 9.8 months, from July 20 to May 13. The month with the fewest wet days in Pervomays’k is February, with an average of 3.7 days with at least 0.04 inches of precipitation.

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 in Pervomays’k changes throughout the year.

Rain alone is the most common for 11 months, from February 10 to January 8. The month with the most days of rain alone in Pervomays’k is June, with an average of 8.6 days.

Snow alone is the most common for 1.1 months, from January 8 to February 10. The month with the most days of snow alone in Pervomays’k is January, with an average of 1.9 days.

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. Pervomays’k experiences some seasonal variation in monthly rainfall.

The rainy period of the year lasts for 9.7 months, from March 6 to December 30, with a sliding 31-day rainfall of at least 0.5 inches. The month with the most rain in Pervomays’k is June, with an average rainfall of 2.1 inches.

The rainless period of the year lasts for 2.3 months, from December 30 to March 6. The month with the least rain in Pervomays’k is January, with an average rainfall of 0.4 inches.

Snowfall

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. Pervomays’k experiences significant seasonal variation in monthly snowfall.

The snowy period of the year lasts for 4.8 months, from October 31 to March 26, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow in Pervomays’k is January, with an average snowfall of 4.3 inches.

The snowless period of the year lasts for 7.2 months, from March 26 to October 31. The least snow falls around July 22, with an average total accumulation of 0.0 inches.

The length of the day in Pervomays’k varies extremely over the course of the year. In 2026, the shortest day is December 21, with 8 hours, 22 minutes of daylight; the longest day is June 21, with 16 hours, 3 minutes of daylight.

The earliest sunrise is at 4:56 AM on June 16, and the latest sunrise is 2 hours, 50 minutes later at 7:46 AM on January 1. The earliest sunset is at 4:03 PM on December 10, and the latest sunset is 4 hours, 57 minutes later at 9:00 PM on June 26.

Daylight saving time (DST) is observed in Pervomays’k during 2026, starting in the spring on March 29, lasting 6.9 months, and ending in the fall on October 25.

The figure below presents a compact representation of key lunar data for 2026. 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.

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 perceived humidity level in Pervomays’k, as measured by the percentage of time in which the humidity comfort level is muggy, oppressive, or miserable, does not vary significantly over the course of the year, staying within 2% of 2% throughout.

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 Pervomays’k experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 3.7 months, from December 26 to April 17, with average wind speeds of more than 9.5 miles per hour. The windiest month of the year in Pervomays’k is March, with an average hourly wind speed of 10.6 miles per hour.

The calmer time of year lasts for 8.3 months, from April 17 to December 26. The calmest month of the year in Pervomays’k is July, with an average hourly wind speed of 8.4 miles per hour.

The predominant average hourly wind direction in Pervomays’k varies throughout the year.

The wind is most often from the north for 2.3 months, from January 20 to March 28 and for 6.1 months, from April 27 to October 29, with a peak percentage of 43% on July 10. The wind is most often from the south for 3.7 weeks, from March 28 to April 23 and for 3.9 weeks, from October 29 to November 25, with a peak percentage of 29% on November 13. The wind is most often from the west for 1.8 months, from November 25 to January 20, with a peak percentage of 31% on January 1.

To characterize how pleasant the weather is in Pervomays’k 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 Pervomays’k for general outdoor tourist activities is from early June to early September, with a peak score in the first week of August.

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 Pervomays’k for hot-weather activities is from mid July to mid August, with a peak score in the first week of August.

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.

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 Pervomays’k typically lasts for 6.4 months (195 days), from around April 10 to around October 23, rarely starting before March 21 or after April 30, and rarely ending before October 5 or after November 11.

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 in Pervomays’k should appear around April 22, only rarely appearing before April 13 or after May 4.

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 3.7 months, from May 1 to August 24, with an average daily incident shortwave energy per square meter above 5.6 kWh. The brightest month of the year in Pervomays’k is July, with an average of 6.7 kWh.

The darker period of the year lasts for 3.6 months, from October 30 to February 16, with an average daily incident shortwave energy per square meter below 2.1 kWh. The darkest month of the year in Pervomays’k is December, with an average of 1.0 kWh.

For the purposes of this report, the geographical coordinates of Pervomays’k are 48.044 deg latitude, 30.851 deg longitude, and 249 ft elevation.

The topography within 2 miles of Pervomays’k contains only modest variations in elevation, with a maximum elevation change of 302 feet and an average elevation above sea level of 328 feet. Within 10 miles contains only modest variations in elevation (545 feet). Within 50 miles contains significant variations in elevation (1,027 feet).

The area within 2 miles of Pervomays’k is covered by artificial surfaces (62%) and cropland (21%), within 10 miles by cropland (74%), and within 50 miles by cropland (74%) and trees (11%).