Saints Constantine and Helena Weather in September
Saints Constantine and Helena in September sees high daytime temperatures of 23°C (73°F) and nighttime lows of 17°C (63°F). Moderate rainfall is typical, with around 54 mm (2.1 in) for the month.
Rainfall in Saints Constantine and Helena in September
Expect around 5 days of rain based on historical data, with 54 mm (2.1 in) average. The rain this month typically falls in concentrated bursts rather than all-day showers. Expect a few heavier spells rather than constant grey skies.
Temperature in Saints Constantine and Helena in September
Weather in Saints Constantine and Helena is at its perfect in September. Highs reach 23°C (73°F), while nights settle around 17°C (63°F). The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. Nights drop to around 17°C (63°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.
Sunshine in Saints Constantine and Helena in September
The days are predominantly sunny, with an estimated total of around 219 hours of sunshine. These sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.
Wind Speed in Saints Constantine and Helena in September
Average wind conditions reach 2 m/s (4 knots) in September. 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 September
The water is 23°C (73°F) this month — warm enough that getting in requires no effort at all. Good conditions for swimming, snorkeling, or just floating around.If your ideal day consists of dry skies and pleasant temperatures, May, June, July, August and September typically offer the best circumstances for Saints Constantine and Helena.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Bulgaria, check out our Saints Constantine and Helena's climate page.
Saints Constantine and Helena Temperature in September
Min Temperature
17°C (63°F)
Max Temperature
23°C (73°F)
Water Temperature
23°C (73°F) *
Chance of Rain
15%
Precipitation
54 mm (2.1 in)
Rainy days
5 days
Humidity
73% *
Windspeed
2 m/s (4 knots) *
Sunshine
219 hours *
Percentage Sunshine
61% *
Daily Historical Temperatures
49-year average (1976-2025)
Based on our historical records, temperatures in Saints Constantine and Helena typically drop from around 26°C (79°F) at the start of September to approximately 22°C (72°F) by the end. Nights are cool, with lows typically ranging from 12°C (54°F) to 16°C (61°F).
Average temperatures in September
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 September
Historical weather for Saints Constantine and Helena in September
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 September
Our historical data for Saints Constantine and Helena spans 1997 to 2025, revealing these weather extremes.
- The hottest September day on record in Saints Constantine and Helena reached 36°C (97°F) (September 15, 2022).
- Saints Constantine and Helena experienced its chilliest September day on September 24, 2000, reaching only 12°C (54°F).
- The coldest night in September in Saints Constantine and Helena was on September 28, 2018, with a minimum of 3°C (37°F).
Best Places in Bulgaria in September
Find out more about the weather in Bulgaria and which places have the best travel conditions in this month. See all of Bulgaria in September →
perfect weather
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tolerable
unpleasant
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What to Wear in Saints Constantine and Helena in September
Comfortable temperatures call for an easy wardrobe in September. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Wet weather is likely, so pack waterproof gear for multiple rainy days. Expect water temperatures of around 23°C (73°F), which is ideal for taking a refreshing dip. Bring swimwear and consider packing a towel for drying off. 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 September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Bulgaria, check out our Saints Constantine and Helena's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Saints Constantine and Helena climate overview or explore weather in Bulgaria.
