The best times to visit Sumy for ideal weather are
April 30th to September 16th
based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.
Sumy Travel Guide
Other Sumy Travel Info
Weather in Sumy
Temperature
Average temperatures in Sumy 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 34th 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 Sumy, the hottest months are July, August, and then June. See average monthly temperatures below. The warmest time of year is generally early to mid August where highs are regularly around 84.1°F (28.9°C) with temperatures rarely dropping below 58.8°F (14.9°C) at night.
Sumy Temperatures (Fahrenheit)
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Sumy Temperatures (Celsius)
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“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.
Sumy Perceived Temperature (F)
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Sumy Perceived Temperature (C)
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Average Sumy 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 | 26.2 | 22 | 17.4 |
| Feb | 28.3 | 23 | 17.4 |
| Mar | 41 | 33.7 | 26.7 |
| Apr | 58.4 | 48.3 | 38.4 |
| May | 72.7 | 61.6 | 50.1 |
| Jun | 77.5 | 67 | 56.4 |
| Jul | 80.8 | 70.3 | 60.1 |
| Aug | 80.2 | 68.5 | 57 |
| Sep | 67.7 | 57.4 | 47.9 |
| Oct | 53.3 | 44.8 | 37.1 |
| Nov | 41.4 | 36.6 | 32 |
| Dec | 30.8 | 27.3 | 23.3 |
Show Celsius
| Month | Avg. High (°C) | Avg. Mean (°C) | Avg. Low (°C) |
|---|---|---|---|
| Jan | -3.2 | -5.6 | -8.1 |
| Feb | -2.1 | -5 | -8.1 |
| Mar | 5 | 0.9 | -2.9 |
| Apr | 14.7 | 9.1 | 3.6 |
| May | 22.6 | 16.4 | 10.1 |
| Jun | 25.3 | 19.4 | 13.6 |
| Jul | 27.1 | 21.3 | 15.6 |
| Aug | 26.8 | 20.3 | 13.9 |
| Sep | 19.8 | 14.1 | 8.8 |
| Oct | 11.8 | 7.1 | 2.8 |
| Nov | 5.2 | 2.6 | 0 |
| Dec | -0.7 | -2.6 | -4.8 |
Precipitation (Rain or Snow)
If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Sumy are August, March, and then April. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around late April. For example, on the week of April 23rd there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in late January and early February with an average of 2 days of significant precipitation the week of January 29th.
When can you find snow in Sumy? Weather stations report large amounts of snow likely to be deepest around February, especially close to mid March. The best time to ski (if at all) in Sumy is often around around March 12th 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 Sumy.
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Snow on the Ground
The graph below shows the average snow on the ground in Sumy (in).
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Average Rain and Snow by Month
Show Inches
| Month | Daily Chance of Rain | Average Snow Depth (in) | Total Precipitation (in) |
|---|---|---|---|
| Jan | 20% | 4.3 | 1.8 |
| Feb | 17% | 5.9 | 1.4 |
| Mar | 13% | 5.9 | 1.5 |
| Apr | 13% | 1.4 | 1.1 |
| May | 17% | 0 | 2.3 |
| Jun | 17% | 0 | 2.4 |
| Jul | 21% | 0 | 3.2 |
| Aug | 9% | 0 | 1.3 |
| Sep | 17% | 0 | 2.1 |
| Oct | 16% | 0.4 | 1.6 |
| Nov | 16% | 1.2 | 1.5 |
| Dec | 21% | 1.9 | 1.8 |
Show Centimeters
| Month | Daily Chance of Rain | Average Snow Depth (cm) | Total Precipitation (cm) |
|---|---|---|---|
| Jan | 20 | 10.9 | 4.6 |
| Feb | 17 | 15 | 3.6 |
| Mar | 13 | 15 | 3.8 |
| Apr | 13 | 3.6 | 2.8 |
| May | 17 | 0 | 5.8 |
| Jun | 17 | 0 | 6.1 |
| Jul | 21 | 0 | 8.1 |
| Aug | 9 | 0 | 3.3 |
| Sep | 17 | 0 | 5.3 |
| Oct | 16 | 1 | 4.1 |
| Nov | 16 | 3 | 3.8 |
| Dec | 21 | 4.8 | 4.6 |
Humidity and Wind
Sumy has some extremely humid months, with other comfortably humid months. The least humid month is May (52.3% relative humidity), and the most humid month is December (83.2%).
Wind in Sumy is usually calm. The windiest month is December, followed by February and January. December’s average wind speed of around 8.3 knots (9.6 MPH or 15.4 KPH) is considered “a gentle breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in mid March where average top sustained speeds reach 13.3 knots, which is considered a moderate breeze.
Relative Humidity (%)
The graph below shows the average % humidity by month in Sumy.
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Wind
The graph below shows wind speed (max and average) in knots.
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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 | 8 | Gentle breeze | 10.9 | Gentle breeze |
| Feb | 8 | Gentle breeze | 11.1 | Significant breeze |
| Mar | 7.7 | Gentle breeze | 11.4 | Gentle breeze |
| Apr | 7.1 | Gentle breeze | 11.2 | Significant breeze |
| May | 6.3 | Light breeze | 10.3 | Gentle breeze |
| Jun | 6 | Light breeze | 9.8 | Gentle breeze |
| Jul | 5.5 | Light breeze | 9 | Gentle breeze |
| Aug | 5.4 | Light breeze | 9.1 | Gentle breeze |
| Sep | 6.1 | Light breeze | 9.6 | Gentle breeze |
| Oct | 6.2 | Light breeze | 9.4 | Gentle breeze |
| Nov | 7.4 | Gentle breeze | 10.4 | Gentle breeze |
| Dec | 8.3 | Gentle breeze | 11.3 | Significant breeze |
Show Relative Humidity by Month
| Month | Avg. Relative Humidity |
|---|---|
| Jan | 80.3% |
| Feb | 77.9% |
| Mar | 69.8% |
| Apr | 52.7% |
| May | 52.3% |
| Jun | 56% |
| Jul | 59.6% |
| Aug | 53.3% |
| Sep | 63.6% |
| Oct | 71.1% |
| Nov | 80.8% |
| Dec | 83.2% |
Is it Safe to Travel to Sumy?
Our best data indicates this area is generally not safe. As of Dec 04, 2023 there are very strong travel warnings for Ukraine; avoid all travel. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Nov 29, 2023.
The Busiest and Least Crowded Months
The busiest month for tourism in Sumy, Ukraine is May, followed by March and February. 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 Sumy 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
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Overall Sumy Travel Experience by Season
Spring (March through May)
Humidity and temperatures combine to make this season feel moderately cold. Highs range from 77.1°F (25.1°C) and 33.6°F (0.9°C) with far warmer temperatures in the later months. Rain is somewhat common with 4 to 5 days of significant precipitation per month. Spring is the 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 moderate precipitation with 3 to 7 days of precipitation per month. June – August is the second busiest season for tourism in Sumy, so lodging and other accommodations may cost slightly more.
Fall (September through November)
Fall daily highs range from 71.3°F (21.8°C) and 35.4°F (1.9°C), which will feel chilly given the humidity and wind. It rains or snows a significant amount: approximately 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 far too cold this time of year in Sumy to be enjoyable for warm weather travelers. The average high during this season is between 35.2°F (1.8°C) and 22.3°F (-5.4°C). On average, it rains or snows a fair amount: 5 to 7 times per month. These times of year are fairly slow with tourists.
Best Times to Travel› Ukraine › Sumy, Ukraine