Saints Constantine and Helena
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Saints Constantine and Helena Weather in May

May in Saints Constantine and Helena brings pleasant temperatures, with daytime highs of 20°C (68°F) and nights around 14°C (57°F). The excellent weather makes it a solid choice for a visit.

Rainfall in Saints Constantine and Helena in May

Historically, the month has about 7 days of rain, averaging 47 mm (1.9 in) in total. Neither particularly heavy nor particularly frequent, the rain this month is about average. A light jacket should be enough on most wet days.

Temperature in Saints Constantine and Helena in May

May tends to be one of the excellent months in Saints Constantine and Helena, with 20°C (68°F) in the afternoon and 14°C (57°F) overnight. A light jacket or extra layer can be useful, especially outside the warmest hours of the day. With lows of 14°C (57°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.

Sunshine in Saints Constantine and Helena in May

With approximately 247 hours of sunshine, the days are filled with clear skies. It makes it a perfect month for being outside.

Wind Speed in Saints Constantine and Helena in May

Average wind conditions reach 2 m/s (4 knots) in May. This creates comfortable weather with light winds that gently move vegetation. Keep in mind this is an average. Daily conditions range from near-calm to more noticeable wind.

Average water temperature in May

With water at 16°C (61°F), it's on the cooler side. Keen swimmers won't be put off, but those who prefer warm water may find it less enjoyable.

If you're a fan of comfortable temperatures and drier conditions, May is a great time to visit.

Saints Constantine and Helena Temperature in May

Min Temperature
14°C (57°F)
Max Temperature
20°C (68°F)
Water Temperature
16°C (61°F) *
Chance of Rain
25%
Precipitation
47 mm (1.9 in)
Rainy days
7 days
Humidity
72% *
Windspeed
2 m/s (4 knots) *
Sunshine
247 hours *
Percentage Sunshine
53% *
* Data from: Varna, Bulgaria (8 KM, 5 Miles).

Saints Constantine and Helena Weather by Month

Pick a month to see the average temperature, rainfall and sunshine in Saints Constantine and Helena - and find the best time to visit.

Daily Historical Temperatures

49-year average (1976-2025)

Based on our historical records, temperatures in Saints Constantine and Helena typically rise from around 19°C (66°F) at the start of May to approximately 23°C (73°F) by the end. Nights are cool, with lows typically ranging from 9°C (48°F) to 13°C (55°F).

Average temperatures in May

Daily Historical Precipitation

49-year average (1976-2025)

Average daily rainfall for each day of the month based on long-term records.

Average precipitation in May

Historical weather records for Saints Constantine and Helena in May

Browse day-by-day weather records for Saints Constantine and Helena spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Saints Constantine and Helena historical weather extremes in May

Based on weather observations in Saints Constantine and Helena between 1997 and 2026, these are the recorded extremes during May.

  • The hottest May day on record in Saints Constantine and Helena reached 31°C (88°F) (May 21, 2006).
  • The lowest daytime temperature in May was 10°C (50°F), recorded on May 1, 2011.
  • Nighttime temperatures dropped to 1°C (34°F) on May 5, 2000, marking the coldest May night on record.

Best Places in Bulgaria in May

Find out more about the weather in Bulgaria and which places have the best travel conditions in this month. See all of Bulgaria in May →

perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

What to Wear in Saints Constantine and Helena in May

For Saints Constantine and Helena in May, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. Rain is likely on several days, so bring a good rain jacket. Expect water temperatures of around 16°C (61°F), which is definitely too cold for comfortable swimming. Your luggage space is better used for other items. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in Saints Constantine and Helena in May

We rated the following activities from 1 (least suitable) to 10 (best) to do.

  • Cycling
    10/10
  • Walking
    10/10
  • Camping
    10/10
  • Outdoor sports
    10/10

Saints Constantine and Helena 3-Day Forecast

More climate data for Saints Constantine and Helena

Popular in May

Where to go in May - average daytime high across popular destinations.

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