Harmanli in Summer
In summer (June, July and August), Harmanli sees average daytime highs around 29°C and overnight lows near 18°C, with 133 mm of rain over about 20 wet days across the season. It is the warmest season of the year and the driest season of the year.
Over the season highs climb from about 25°C in early June to 29°C by late August. The sky is clear or mostly clear about 64% of the time across summer, and the air most often feels comfortable.
Summer is Harmanli's 2nd-best season to visit on our travel score. For the whole year in context, see Harmanli's year-round climate.
- Avg daytime high
- 29°C
- warmest season of the year
- Avg overnight low
- 18°C
- Rainfall
- 133 mm
- 20 wet days
- Avg wind
- 9 km/h
- Travel score
- 5.9
- 2nd-best season
- Months
- Jun · Jul · Aug
Temperature in Harmanli in Summer
Over the season highs climb from about 25°C in early June to 29°C by late August.
A typical summer day in Harmanli reaches about 29°C and drops to 18°C overnight. The warmest of the three months is August, the coolest June.
How summer really feels in Harmanli
Once humidity and wind are folded in, summer brings about 0 days that feel above 32°C and 0 that feel at or below 0°C.
summer sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Harmanli weather by month
How the three summer months (June, July and August) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 6° / -1° | 51 | 7.3 | 3.1 | 9.3 | 0.4 |
| Feb | 8° / 0° | 49 | 7.3 | 2.4 | 10.3 | 1.6 |
| Mar | 12° / 3° | 60 | 8.8 | 1.9 | 11.7 | 3.5 |
| Apr | 18° / 7° | 54 | 8.9 | 0.3 | 13.1 | 5.8 |
| May | 23° / 12° | 67 | 11.3 | 0 | 14.3 | 6.7 |
| Jun | 27° / 16° | 55 | 9.4 | 0 | 15 | 6.5 |
| Jul | 30° / 18° | 50 | 6.6 | 0 | 14.7 | 5.6 |
| Aug | 31° / 18° | 28 | 4.4 | 0 | 13.7 | 5.7 |
| Sep | 26° / 14° | 41 | 5.6 | 0 | 12.3 | 7.7 |
| Oct | 19° / 10° | 60 | 6.4 | 0.1 | 10.9 | 6.7 |
| Nov | 13° / 5° | 54 | 6.5 | 0.8 | 9.6 | 3.8 |
| Dec | 7° / 0° | 62 | 7.8 | 2.5 | 9 | 1.0 |
Cloud cover in Summer
The sky is clear or mostly clear about 64% of the time across summer.
Chance of precipitation in Summer
Harmanli gets around 133 mm of rain over 20 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels comfortable — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 9 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 14 h 48 min in early June to 13 hours by late August. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 6.4 kWh/m².
Is summer a good time to visit Harmanli?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is a reasonable time to visit Harmanli for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Harmanli in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Harmanli sees daytime highs around 29°C and nights near 18°C. Pack light clothes and sun protection. Worth having: rain gear. About 20 days see rain.
UV index in Harmanli in Summer
Clear-sky midday UV across summer averages around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Harmanli peaks around July 17 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 at about 1 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 1 | 2 | 4 | 8 | 7 | 8 | 9 | 8 | 6 | 4 | 2 | 1 |
| Level | Low | Moderate | Moderate | Very high | High | Very high | Very high | Very high | High | Moderate | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 2 | Moderate |
| Mar | 4 | Moderate |
| Apr | 8 | Very high |
| May | 7 | High |
| Jun | 8 | Very high |
| Jul | 9 | Very high |
| Aug | 8 | Very high |
| Sep | 6 | High |
| Oct | 4 | Moderate |
| Nov | 2 | Moderate |
| Dec | 1 | Low |
Air quality in Harmanli in Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer falls, not just the annual average.
Air quality in Harmanli is worst in March — around 16 µg/m³ PM2.5 (moderate), about 1.6× the cleanest month (September, 10 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 14 | 14 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 11 | 11 | 11 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 14 | Moderate |
| Feb | 14 | Moderate |
| Mar | 16 | Moderate |
| Apr | 15 | Moderate |
| May | 14 | Moderate |
| Jun | 13 | Moderate |
| Jul | 12 | Good |
| Aug | 11 | Good |
| Sep | 10 | Good |
| Oct | 11 | Good |
| Nov | 11 | Good |
| Dec | 11 | Good |
Where is Harmanli?
Harmanli sits at 41.9°N, 25.9°E, 61 m above sea level, in Bulgaria. The nearest listed city is Dimitrovgrad, 28 km away.
Topography around Harmanli
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Harmanli.
Within 3 km, the terrain around Harmanli has only modest variations in elevation — a maximum elevation change of 178 m around an average of 114 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 361 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,691 m.
The land around Harmanli is covered by trees (29%), grassland (29%) and cropland (27%) within 3 km, cropland (34%), grassland (32%) and trees (31%) within 16 km, and cropland (42%), trees (35%) and grassland (20%) within 80 km.
Bulgaria travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type C / F
- 230 V · 50 Hz
- Prices
- ≈ 23% of US
- price level, 2025
- GDP per capita
- $20,328
- 2025
- Happiness
- 5.7 / 10
- World Happiness, 2025
- Safe drinking water
- 96%
- of population, 2024
- Homicide rate
- 1.1
- per 100k, 2023
- Road deaths
- 9.2
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- High
- EF EPI 594
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Harmanli (41.9323°, 25.9017°, elevation 61 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.