Troyan, Bulgaria Climate
The warmest month is August, with an average high of 29°C; the coldest is January, with an average low of -5°C. A normal year brings 644 mm of precipitation.
Temperature through the year
The normal daily high and low. The line marks today.
- Normal low
- Normal high
- Reanalysis extreme high
- Reanalysis extreme low
Normals for Sep 24
- Normal high
- 22°C
- Normal low
- 10°C
- Reanalysis high
- 33°Cin 2001
- Reanalysis low
- 4°Cin 2000
- Chance of a wet day
- 29%
- Daylight
- 12 h 05 min
Month by month
Averages for 1991-2020. Wet days have at least 1 mm of precipitation in the reanalysis. Each month links to its own page.
| Month | Avg high | Avg low | Warmest | Coldest | Precipitation | Wet days |
|---|---|---|---|---|---|---|
| January | 3°C | -5°C | 19°C (2007) | -22°C (2012) | 37 mm | 9.3 |
| February | 6°C | -4°C | 22°C (2014) | -23°C (2012) | 40 mm | 8.5 |
| March | 10°C | 0°C | 28°C (2001) | -17°C (2018) | 50 mm | 9.3 |
| April | 16°C | 5°C | 29°C (2016) | -7°C (2003) | 54 mm | 12.0 |
| May | 21°C | 10°C | 34°C (2020) | 0°C (1999) | 81 mm | 15.5 |
| June | 25°C | 14°C | 37°C (2007) | 4°C (2020) | 81 mm | 15.0 |
| July | 28°C | 16°C | 41°C (2000) | 8°C (1993) | 74 mm | 12.4 |
| August | 29°C | 16°C | 38°C (1993) | 6°C (1993) | 47 mm | 9.3 |
| September | 24°C | 11°C | 35°C (2015) | 2°C (2018) | 51 mm | 9.0 |
| October | 18°C | 6°C | 33°C (1993) | -8°C (1997) | 50 mm | 6.2 |
| November | 11°C | 2°C | 25°C (2004) | -16°C (1993) | 36 mm | 6.0 |
| December | 5°C | -3°C | 19°C (2004) | -21°C (1997) | 43 mm | 9.3 |
| Year | 16°C | 6°C | 644 mm | 122 |
Precipitation
Rain and melted snow together. The chance of a wet day is the share of days with at least 1 mm of precipitation in the reanalysis.
644 mm in a normal year, most in May.
Chance of a wet day
- Chance of a wet day
Humidity and comfort
NASA POWER reanalysis, 1991-2020, for the grid cell around Troyan.
Days with a mean dew point of 18°C or more are rare here in every month.
| Month | Dew point | Humidity | Dry | Comfortable | Humid | Muggy | Oppressive | Miserable |
|---|---|---|---|---|---|---|---|---|
| January | -3°C | 88% | 100% | 0% | 0% | 0% | 0% | 0% |
| February | -2°C | 84% | 100% | 0% | 0% | 0% | 0% | 0% |
| March | 0°C | 77% | 100% | 0% | 0% | 0% | 0% | 0% |
| April | 4°C | 72% | 100% | 0% | 0% | 0% | 0% | 0% |
| May | 9°C | 69% | 93% | 7% | 0% | 0% | 0% | 0% |
| June | 12°C | 64% | 63% | 32% | 6% | 0% | 0% | 0% |
| July | 12°C | 58% | 56% | 33% | 10% | 0% | 0% | 0% |
| August | 11°C | 55% | 67% | 27% | 6% | 0% | 0% | 0% |
| September | 8°C | 60% | 94% | 5% | 1% | 0% | 0% | 0% |
| October | 6°C | 72% | 99% | 1% | 0% | 0% | 0% | 0% |
| November | 2°C | 81% | 100% | 0% | 0% | 0% | 0% | 0% |
| December | -2°C | 87% | 100% | 0% | 0% | 0% | 0% | 0% |
Comfort is judged by the day's mean dew point: dry below 13°C, comfortable to 16°C, humid to 18°C, muggy to 21°C, oppressive to 24°C, miserable above.
Clouds
Average share of the sky covered, from satellite (CERES and GEWEX SRB) by way of NASA POWER, 1991-2020.
The clearest month is August, with the sky 37 percent covered on average; the cloudiest is December, at 70 percent.
Wind
The mean wind speed over the whole day, from the MERRA-2 reanalysis by way of NASA POWER. Gusts run well above it.
The windiest month is February, averaging 10.4 km/h at 10 meters (33 feet) above the ground.
Daylight and sunshine
The longest day is Jun 17, with 15 h 21 min of daylight; the shortest is Dec 17, with 9 h 01 min.
- Day length
Solar energy
Average daily sunshine reaching the ground on a flat surface, in kilowatt-hours per square meter, clouds included.
Month pages
The weather in Troyan in each month, day by day.
What this means
A normal is the average of the thirty years 1991 to 2020, the period the World Meteorological Organization and NOAA use for comparison. It is an average, not a forecast: most days depart from it, and some by a long way.
Where no station record is within reach, the extremes shown are the highest and lowest the reanalysis produced for the date in 1991-2020, not measured records.
Cloud, humidity, wind and sunshine come from a reanalysis: a weather model run over the past with every observation fed in, averaged over a grid cell about 50 km across. It is consistent everywhere on Earth; it smooths local detail such as a lake shore or a valley.
More for this place
Nearby
Sources
Cloud, humidity, wind and sunshine, and temperature and precipitation: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.