The best times to visit Bolu for ideal weather are

April 23rd to October 14th

based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.



Other Bolu Travel Info

Weather in Bolu


Average temperatures in Bolu vary drastically. Considering humidity, temperatures feel cold for about half of the year and otherwise nice with a fair chance of precipitation about half of the year. The area is less temperate than some — in the 39th percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Bolu, the hottest months are July, August, and then June. See average monthly temperatures below. The warmest time of year is generally late July where highs are regularly around 87.5°F (30.8°C) with temperatures rarely dropping below 60.6°F (15.9°C) at night.

Bolu Temperatures (Fahrenheit)


Bolu Temperatures (Celsius)


“Feels-Like” Temperatures

The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.

Bolu Perceived Temperature (F)


Bolu Perceived Temperature (C)



Average Bolu Temperatures by Month

Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.

Show Fahrenheit

Month Avg. High (°F) Avg. Mean (°F) Avg. Low (°F)
Jan 43.3 35.4 28.3
Feb 47.3 38.3 30.2
Mar 53.6 43.8 34.3
Apr 62.7 51.6 39.9
May 72.8 60.9 48.1
Jun 78.7 66.6 54.1
Jul 84 73.4 58.5
Aug 85.5 73.3 58.5
Sep 78.1 65.7 52.6
Oct 67.1 55.6 45.8
Nov 57.9 47.1 37.8
Dec 46.9 39.2 31.4

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 6.3 1.9 -2.1
Feb 8.5 3.5 -1
Mar 12 6.6 1.3
Apr 17.1 10.9 4.4
May 22.7 16.1 8.9
Jun 25.9 19.2 12.3
Jul 28.9 23 14.7
Aug 29.7 22.9 14.7
Sep 25.6 18.7 11.4
Oct 19.5 13.1 7.7
Nov 14.4 8.4 3.2
Dec 8.3 4 -0.3



Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Bolu are July, August, and then September. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around mid to late August. For example, on the week of August 20th there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in early June with an average of 3 days of significant precipitation the week of June 4th.

When can you find snow in Bolu? Weather stations report large amounts of snow likely to be deepest around January, especially close to early to mid January. The best time to ski (if at all) in Bolu is often around around January 15th when fresh powder is deepest. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.

Chance of Precipitation

The graph below shows the % chance of rainy and snowy days in Bolu.

Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Bolu (in).

Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 22% 4.9 2.5
Feb 21% 3.9 1.9
Mar 27% 3.1 2.5
Apr 21% 2.8 2.1
May 23% 0 2.6
Jun 23% 0 3.1
Jul 6% 0 0.8
Aug 6% 0 0.6
Sep 10% 0 1.2
Oct 17% 0 2
Nov 14% 0.8 1.2
Dec 20% 3.5 2.3

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 22 12.4 6.4
Feb 21 9.9 4.8
Mar 27 7.9 6.4
Apr 21 7.1 5.3
May 23 0 6.6
Jun 23 0 7.9
Jul 6 0 2
Aug 6 0 1.5
Sep 10 0 3
Oct 17 0 5.1
Nov 14 2 3
Dec 20 8.9 5.8


Humidity and Wind

Bolu has some very humid months, with other moderately humid months on the other side of the year. The least humid month is August (49.7% relative humidity), and the most humid month is January (74.3%).

Wind in Bolu is usually extremely calm. The windiest month is July, followed by August and April. July’s average wind speed of around 3 knots (3.5 MPH or 5.6 KPH) is considered “light air.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in late August to early September where average top sustained speeds reach 6.8 knots, which is considered a light breeze.

Relative Humidity (%)

The graph below shows the average % humidity by month in Bolu.

Avg. Relative Humidity


The graph below shows wind speed (max and average) in knots.

Max Sustained Wind
Average Daily Wind

Average Wind Speeds

Show Wind Speeds

All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.

Month Avg. Wind Avg. Wind Feel Sustained High Wind High Wind Feel
Jan 2.1 Barely noticeable 4.2 Light breeze
Feb 2.4 Barely noticeable 4.7 Light breeze
Mar 2.7 Barely noticeable 5.7 Light breeze
Apr 2.8 Barely noticeable 6.2 Light breeze
May 2.7 Barely noticeable 6 Light breeze
Jun 2.6 Barely noticeable 6 Light breeze
Jul 3 Barely noticeable 6.2 Light breeze
Aug 3 Barely noticeable 6.5 Light breeze
Sep 2.6 Barely noticeable 6 Light breeze
Oct 2.1 Barely noticeable 4.7 Light breeze
Nov 2 Barely noticeable 4.1 Light breeze
Dec 1.9 Barely noticeable 3.6 Barely noticeable

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 74.3%
Feb 67.6%
Mar 62.3%
Apr 56.5%
May 57%
Jun 59.7%
Jul 50.4%
Aug 49.7%
Sep 55.2%
Oct 65.1%
Nov 63.9%
Dec 71.4%


Is it Safe to Travel to Bolu?

Our best data indicates this area is somewhat safe, but with extra warnings in a few regions. As of Oct 07, 2019 there are travel warnings and regional advisories for Turkey; exercise a high degree of caution and avoid some areas. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Oct 02, 2019.


The Busiest and Least Crowded Months

The busiest month for tourism in Bolu, Turkey is January, followed by August and March. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit Bolu in December. Those willing to visit at these times will likely find it the least expensive month.

Estimated Tourism by Month


Most Popular Months to Visit

Tourists Seeking Accommodations

Tourism graph is based on Google searches for services used by tourists relative to the rest of the year. Tourism data for this area is extrapolated based on nearby areas. Displayed data is calculated relative to the peak, so a score of 55 in December means 55% of the tourists vs. January.



Overall Bolu Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 76.5°F (24.7°C) and 48.7°F (9.3°C) with warmer temperatures in the later months. Rain is somewhat common with 6 to 8 days of significant precipitation per month. Spring is the second busiest for tourism, which makes it a good time for those looking for things to do.

Summer (June through August)

The middle-year months have very comfortable weather with high temperatures that are comfortable. These months see the least precipitation with 2 to 7 days of precipitation per month. June – August is the busiest season for tourism in Bolu, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 81.7°F (27.6°C) and 53.7°F (12.1°C), which will feel comfortable given the humidity and wind. It rains or snows a significant amount: 3 to 5 days per month. Tourism is the slowest during these months due to the weather, so hotels may be affordably priced.

Winter (December through February)

Weather is too cold this time of year in Bolu to be enjoyable for warm weather travelers. The average high during this season is between 51.2°F (10.7°C) and 41.2°F (5.1°C). On average, it rains or snows a fair amount: 6 to 7 times per month. These times of year are fairly slow with tourists.


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