Bolu weather in August
In August, Bolu sees average daytime highs of 25°C and overnight lows near 14°C, with 52 mm of rain across 8.3 wet days and about 13.6 hours of daylight. It is the 1st-warmest and 11th-wettest month of the year here.
Day-to-day highs hold fairly steady near 25°C through the month. The sky is clear or mostly clear about 62% of the time in August, and the air most often feels comfortable.
Daylight stretches from about 14 h 12 min at the start of August to 13 hours by month's end. Set against the rest of the year, August is Bolu's 1st-clearest and 8th-windiest month. For the whole year in context, see Bolu's year-round climate.
- Daytime high
- 25°
- 1st warmest
- Overnight low
- 14°
- 12th coldest
- Rainfall
- 52 mm
- 8.3 wet days
- Daylight
- 13 h 36 min
- 5:09 AM – 6:47 PM
- Cloud cover
- 34%
- 1st clearest
- Wind
- 6 km/h
- 8th windiest
- Solar energy
- 6.15 kWh/m²
- Travel score
- 7.7
- out of 10
Bolu is central district and city in Bolu Province, Turkey.
- Air quality
- Elevated
- PM2.5 24.4 µg/m³ · 2019
- Density
- 6,840/km²
- people per km²
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in August
Day-to-day highs hold fairly steady near 25°C through the month.
A typical August day in Bolu reaches about 25°C in the afternoon and slips back to 14°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 29°C. Set against its neighbours, August runs on par with July and about 3°C warmer than September.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 24 | 24 | 24 | 24 | 24 | 24 | 24 |
| Avg low (°C) | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 13 | 13 | 13 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 25 | 15 |
| 2 | 25 | 15 |
| 3 | 25 | 15 |
| 4 | 25 | 15 |
| 5 | 25 | 15 |
| 6 | 25 | 15 |
| 7 | 25 | 15 |
| 8 | 25 | 15 |
| 9 | 25 | 15 |
| 10 | 25 | 15 |
| 11 | 25 | 15 |
| 12 | 25 | 14 |
| 13 | 25 | 14 |
| 14 | 25 | 14 |
| 15 | 25 | 14 |
| 16 | 25 | 14 |
| 17 | 25 | 14 |
| 18 | 25 | 14 |
| 19 | 25 | 14 |
| 20 | 25 | 14 |
| 21 | 25 | 14 |
| 22 | 25 | 14 |
| 23 | 25 | 14 |
| 24 | 25 | 14 |
| 25 | 24 | 13 |
| 26 | 24 | 13 |
| 27 | 24 | 13 |
| 28 | 24 | 13 |
| 29 | 24 | 13 |
| 30 | 24 | 13 |
| 31 | 24 | 13 |
How August really feels in Bolu
Once humidity and wind are folded in, August averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
August sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Bolu weather by month
How August compares with the rest of the year at a glance. August is the 1st-warmest and 11th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 4° / -4° | 91 | 13.9 | 11 | 9.4 | 0.0 |
| Feb | 5° / -3° | 88 | 13.8 | 10 | 10.4 | 0.2 |
| Mar | 9° / -0° | 107 | 14.9 | 8.5 | 11.7 | 1.6 |
| Apr | 14° / 4° | 99 | 14.4 | 2.5 | 13.1 | 3.5 |
| May | 18° / 8° | 110 | 15.9 | 0.1 | 14.2 | 5.2 |
| Jun | 22° / 11° | 96 | 13.3 | 0 | 14.9 | 6.3 |
| Jul | 24° / 14° | 50 | 8.6 | 0 | 14.6 | 7.6 |
| Aug | 25° / 14° | 52 | 8.3 | 0 | 13.6 | 7.7 |
| Sep | 22° / 11° | 66 | 8.8 | 0 | 12.3 | 7.1 |
| Oct | 17° / 7° | 90 | 11.2 | 0.8 | 10.9 | 5.4 |
| Nov | 11° / 2° | 75 | 10.3 | 3.6 | 9.7 | 2.8 |
| Dec | 6° / -2° | 96 | 13.4 | 8.2 | 9.1 | 0.4 |
Cloud cover in August
The sky is clear or mostly clear about 62% of the time in August, the clearest month of the year.
Beyond those clear spells, partly cloudy skies cover about 18% of August, with mostly cloudy or overcast conditions the remaining 20%.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 83 | 82 | 81 | 81 | 81 | 81 | 81 | 81 | 81 | 81 | 81 | 81 | 81 | 80 | 80 | 80 | 80 | 79 | 79 | 80 | 80 | 79 | 79 | 78 | 78 | 77 | 77 | 77 | 77 | 76 | 76 |
| Cloudier (%) | 17 | 18 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 20 | 20 | 20 | 20 | 21 | 21 | 20 | 20 | 21 | 21 | 22 | 22 | 23 | 23 | 23 | 23 | 24 | 24 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 83 | 17 |
| 2 | 82 | 18 |
| 3 | 81 | 19 |
| 4 | 81 | 19 |
| 5 | 81 | 19 |
| 6 | 81 | 19 |
| 7 | 81 | 19 |
| 8 | 81 | 19 |
| 9 | 81 | 19 |
| 10 | 81 | 19 |
| 11 | 81 | 19 |
| 12 | 81 | 19 |
| 13 | 81 | 19 |
| 14 | 80 | 20 |
| 15 | 80 | 20 |
| 16 | 80 | 20 |
| 17 | 80 | 20 |
| 18 | 79 | 21 |
| 19 | 79 | 21 |
| 20 | 80 | 20 |
| 21 | 80 | 20 |
| 22 | 79 | 21 |
| 23 | 79 | 21 |
| 24 | 78 | 22 |
| 25 | 78 | 22 |
| 26 | 77 | 23 |
| 27 | 77 | 23 |
| 28 | 77 | 23 |
| 29 | 77 | 23 |
| 30 | 76 | 24 |
| 31 | 76 | 24 |
Chance of precipitation in August
Bolu gets around 52 mm of rain over 8.3 wet days in August. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 27% and peaks near 30% on the wettest days.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 26 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 27 | 27 | 28 | 28 | 29 | 29 | 30 |
| Rain chance (%) | |
|---|---|
| 1 | 26 |
| 2 | 27 |
| 3 | 27 |
| 4 | 27 |
| 5 | 27 |
| 6 | 27 |
| 7 | 27 |
| 8 | 27 |
| 9 | 27 |
| 10 | 27 |
| 11 | 26 |
| 12 | 26 |
| 13 | 26 |
| 14 | 25 |
| 15 | 25 |
| 16 | 25 |
| 17 | 25 |
| 18 | 25 |
| 19 | 25 |
| 20 | 25 |
| 21 | 25 |
| 22 | 26 |
| 23 | 26 |
| 24 | 26 |
| 25 | 27 |
| 26 | 27 |
| 27 | 28 |
| 28 | 28 |
| 29 | 29 |
| 30 | 29 |
| 31 | 30 |
Humidity in August
Most of August feels comfortable — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, August lands in the comfortable band about 43% of days. It rarely turns muggy — the humid and sticky bands barely register.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 14 | 14 | 15 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 23 | 24 | 25 | 27 | 29 | 31 | 33 | 35 | 37 | 40 | 42 | 45 |
| Comfortable (%) | 38 | 38 | 38 | 39 | 39 | 39 | 40 | 41 | 42 | 43 | 44 | 44 | 45 | 45 | 46 | 46 | 46 | 46 | 46 | 46 | 46 | 46 | 46 | 45 | 45 | 44 | 43 | 42 | 41 | 40 | 39 |
| Humid (%) | 39 | 40 | 40 | 40 | 39 | 39 | 39 | 38 | 37 | 37 | 36 | 35 | 34 | 33 | 33 | 32 | 31 | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 23 | 22 | 21 | 19 | 18 | 17 | 15 |
| Muggy (%) | 9 | 9 | 9 | 9 | 9 | 9 | 8 | 8 | 7 | 7 | 6 | 6 | 6 | 5 | 5 | 4 | 4 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | |
|---|---|---|---|---|
| 1 | 13 | 38 | 39 | 9 |
| 2 | 13 | 38 | 40 | 9 |
| 3 | 13 | 38 | 40 | 9 |
| 4 | 13 | 39 | 40 | 9 |
| 5 | 13 | 39 | 39 | 9 |
| 6 | 13 | 39 | 39 | 9 |
| 7 | 13 | 40 | 39 | 8 |
| 8 | 13 | 41 | 38 | 8 |
| 9 | 13 | 42 | 37 | 7 |
| 10 | 14 | 43 | 37 | 7 |
| 11 | 14 | 44 | 36 | 6 |
| 12 | 15 | 44 | 35 | 6 |
| 13 | 15 | 45 | 34 | 6 |
| 14 | 16 | 45 | 33 | 5 |
| 15 | 17 | 46 | 33 | 5 |
| 16 | 18 | 46 | 32 | 4 |
| 17 | 19 | 46 | 31 | 4 |
| 18 | 20 | 46 | 31 | 3 |
| 19 | 21 | 46 | 30 | 3 |
| 20 | 23 | 46 | 29 | 3 |
| 21 | 24 | 46 | 28 | 2 |
| 22 | 25 | 46 | 27 | 2 |
| 23 | 27 | 46 | 26 | 2 |
| 24 | 29 | 45 | 25 | 2 |
| 25 | 31 | 45 | 23 | 2 |
| 26 | 33 | 44 | 22 | 1 |
| 27 | 35 | 43 | 21 | 1 |
| 28 | 37 | 42 | 19 | 1 |
| 29 | 40 | 41 | 18 | 1 |
| 30 | 42 | 40 | 17 | 1 |
| 31 | 45 | 39 | 15 | 1 |
Wind in August
Winds average 6 km/h in August.
Across August, daily wind ranges from about 6 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 6 | calm |
| 2 | 6 | calm |
| 3 | 6 | calm |
| 4 | 6 | calm |
| 5 | 6 | calm |
| 6 | 6 | calm |
| 7 | 6 | calm |
| 8 | 6 | calm |
| 9 | 6 | calm |
| 10 | 6 | calm |
| 11 | 6 | calm |
| 12 | 6 | calm |
| 13 | 6 | calm |
| 14 | 6 | calm |
| 15 | 6 | calm |
| 16 | 6 | calm |
| 17 | 6 | calm |
| 18 | 6 | calm |
| 19 | 6 | calm |
| 20 | 6 | calm |
| 21 | 6 | calm |
| 22 | 6 | calm |
| 23 | 6 | calm |
| 24 | 6 | calm |
| 25 | 6 | calm |
| 26 | 6 | calm |
| 27 | 6 | calm |
| 28 | 6 | calm |
| 29 | 6 | calm |
| 30 | 6 | calm |
| 31 | 6 | calm |
Sunrise & sunset in August
Daylight runs from about 14 h 12 min at the start of August to 13 hours by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 72 minutes over August. Sunrise moves from 4:54 AM to 5:24 AM, and sunset from 7:06 PM to 6:23 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 14.2 | 14.2 | 14.1 | 14.1 | 14.1 | 14.0 | 14.0 | 13.9 | 13.9 | 13.9 | 13.8 | 13.8 | 13.8 | 13.7 | 13.7 | 13.6 | 13.6 | 13.6 | 13.5 | 13.5 | 13.4 | 13.4 | 13.3 | 13.3 | 13.3 | 13.2 | 13.2 | 13.1 | 13.1 | 13.0 | 13.0 |
| Sunrise (AM) | 4:54 | 4:55 | 4:56 | 4:57 | 4:58 | 4:59 | 5:00 | 5:01 | 5:02 | 5:03 | 5:04 | 5:05 | 5:06 | 5:07 | 5:08 | 5:09 | 5:10 | 5:11 | 5:12 | 5:13 | 5:14 | 5:15 | 5:16 | 5:17 | 5:18 | 5:19 | 5:20 | 5:21 | 5:22 | 5:23 | 5:24 |
| Sunset (PM) | 7:06 | 7:04 | 7:03 | 7:02 | 7:01 | 7:00 | 6:59 | 6:57 | 6:56 | 6:55 | 6:54 | 6:52 | 6:51 | 6:50 | 6:48 | 6:47 | 6:45 | 6:44 | 6:42 | 6:41 | 6:39 | 6:38 | 6:36 | 6:35 | 6:33 | 6:32 | 6:30 | 6:28 | 6:27 | 6:25 | 6:23 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 14.2 | 4:54 | 7:06 |
| 2 | 14.2 | 4:55 | 7:04 |
| 3 | 14.1 | 4:56 | 7:03 |
| 4 | 14.1 | 4:57 | 7:02 |
| 5 | 14.1 | 4:58 | 7:01 |
| 6 | 14.0 | 4:59 | 7:00 |
| 7 | 14.0 | 5:00 | 6:59 |
| 8 | 13.9 | 5:01 | 6:57 |
| 9 | 13.9 | 5:02 | 6:56 |
| 10 | 13.9 | 5:03 | 6:55 |
| 11 | 13.8 | 5:04 | 6:54 |
| 12 | 13.8 | 5:05 | 6:52 |
| 13 | 13.8 | 5:06 | 6:51 |
| 14 | 13.7 | 5:07 | 6:50 |
| 15 | 13.7 | 5:08 | 6:48 |
| 16 | 13.6 | 5:09 | 6:47 |
| 17 | 13.6 | 5:10 | 6:45 |
| 18 | 13.6 | 5:11 | 6:44 |
| 19 | 13.5 | 5:12 | 6:42 |
| 20 | 13.5 | 5:13 | 6:41 |
| 21 | 13.4 | 5:14 | 6:39 |
| 22 | 13.4 | 5:15 | 6:38 |
| 23 | 13.3 | 5:16 | 6:36 |
| 24 | 13.3 | 5:17 | 6:35 |
| 25 | 13.3 | 5:18 | 6:33 |
| 26 | 13.2 | 5:19 | 6:32 |
| 27 | 13.2 | 5:20 | 6:30 |
| 28 | 13.1 | 5:21 | 6:28 |
| 29 | 13.1 | 5:22 | 6:27 |
| 30 | 13.0 | 5:23 | 6:25 |
| 31 | 13.0 | 5:24 | 6:23 |
Solar energy in August
Average shortwave solar energy reaching the ground each day in August, about 6.15 kWh/m².
For context, solar energy here swings from a low near 1.72 kWh/m² to a high of 6.88 kWh/m² in July across the year — August's 6.15 kWh/m² sits near the top of that range.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 6.6 | 6.6 | 6.5 | 6.5 | 6.5 | 6.5 | 6.4 | 6.4 | 6.4 | 6.4 | 6.3 | 6.3 | 6.3 | 6.3 | 6.2 | 6.2 | 6.2 | 6.1 | 6.1 | 6.0 | 6.0 | 6.0 | 5.9 | 5.9 | 5.8 | 5.8 | 5.7 | 5.7 | 5.6 | 5.6 | 5.5 |
| Level | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 6.6 | Intense |
| 2 | 6.6 | Intense |
| 3 | 6.5 | Intense |
| 4 | 6.5 | Intense |
| 5 | 6.5 | Intense |
| 6 | 6.5 | Intense |
| 7 | 6.4 | Intense |
| 8 | 6.4 | Intense |
| 9 | 6.4 | Intense |
| 10 | 6.4 | Intense |
| 11 | 6.3 | Intense |
| 12 | 6.3 | Intense |
| 13 | 6.3 | Intense |
| 14 | 6.3 | Intense |
| 15 | 6.2 | Intense |
| 16 | 6.2 | Intense |
| 17 | 6.2 | Intense |
| 18 | 6.1 | Intense |
| 19 | 6.1 | Intense |
| 20 | 6.0 | Intense |
| 21 | 6.0 | Intense |
| 22 | 6.0 | Bright |
| 23 | 5.9 | Bright |
| 24 | 5.9 | Bright |
| 25 | 5.8 | Bright |
| 26 | 5.8 | Bright |
| 27 | 5.7 | Bright |
| 28 | 5.7 | Bright |
| 29 | 5.6 | Bright |
| 30 | 5.6 | Bright |
| 31 | 5.5 | Bright |
Is August a good time to visit Bolu?
Our two travel scores rate August for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
August is one of the better times to visit Bolu for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Bolu in August
From August's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In August, Bolu sees daytime highs around 25°C and nights near 14°C. Pack sun protection. Worth having: light clothes and rain gear. About 8 days see rain.
Sea temperature near Bolu in August
The nearest coast averages about 25°C in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 47 km away) is warmest in August at about 25°C and coldest in February near 7°C.
It's comfortable for a long swim from Jun 11 to Oct 12 — about 4.1 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 9 | 7 | 8 | 11 | 16 | 21 | 24 | 25 | 23 | 20 | 15 | 12 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Cool | Refreshing | Refreshing | Warm | Refreshing | Cool | Cool | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 9 | Bracing |
| Feb | 7 | Bracing |
| Mar | 8 | Bracing |
| Apr | 11 | Bracing |
| May | 16 | Cool |
| Jun | 21 | Refreshing |
| Jul | 24 | Refreshing |
| Aug | 25 | Warm |
| Sep | 23 | Refreshing |
| Oct | 20 | Cool |
| Nov | 15 | Cool |
| Dec | 12 | Bracing |
UV index in Bolu in August
Clear-sky midday UV in August peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Bolu peaks around August 10 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 2 (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) | 2 | 2 | 3 | 7 | 7 | 9 | 9 | 9 | 6 | 4 | 2 | 2 |
| Level | Low | Moderate | Moderate | High | Very high | Very high | Very high | Very high | High | Moderate | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Low |
| Feb | 2 | Moderate |
| Mar | 3 | Moderate |
| Apr | 7 | High |
| May | 7 | Very high |
| Jun | 9 | Very high |
| Jul | 9 | Very high |
| Aug | 9 | Very high |
| Sep | 6 | High |
| Oct | 4 | Moderate |
| Nov | 2 | Moderate |
| Dec | 2 | Low |
Air quality in Bolu in August
Average fine-particle pollution (PM2.5) through the year — so you can see where August falls, not just the annual average.
Air quality in Bolu is worst in May — around 33 µg/m³ PM2.5 (moderate), about 1.7× the cleanest month (December, 19 µg/m³).
Seasonal pattern from CAMS reanalysis, scaled to Bolu's WHO annual average of 24.4 µg/m³.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 20 | 23 | 32 | 33 | 33 | 26 | 21 | 21 | 20 | 22 | 22 | 19 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 20 | Moderate |
| Feb | 23 | Moderate |
| Mar | 32 | Moderate |
| Apr | 33 | Moderate |
| May | 33 | Moderate |
| Jun | 26 | Moderate |
| Jul | 21 | Moderate |
| Aug | 21 | Moderate |
| Sep | 20 | Moderate |
| Oct | 22 | Moderate |
| Nov | 22 | Moderate |
| Dec | 19 | Moderate |
Where is Bolu?
Bolu sits at 40.7°N, 31.6°E, 733 m above sea level, in Turkey. The nearest listed city is Kaynaşlı, 24 km away.
Topography around Bolu
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Bolu.
Within 3 km, the terrain around Bolu has only modest variations in elevation — a maximum elevation change of 178 m around an average of 745 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,296 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,359 m.
The land around Bolu is covered by artificial surfaces (51%) and cropland (33%) within 3 km, trees (67%) within 16 km, and trees (63%) and grassland (21%) within 80 km.
Turkey travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / F
- 230 V · 50 Hz
- Prices
- ≈ 41% of US
- price level, 2025
- GDP per capita
- $18,599
- 2025
- Happiness
- 5.3 / 10
- World Happiness, 2025
- Homicide rate
- 3.2
- per 100k, 2023
- Road deaths
- 6.7
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Low
- EF EPI 488
- 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 Bolu (40.7358°, 31.6061°, elevation 733 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).