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Kostroma, Kostroma Oblast Weather by Month and Climate Averages
Monthly normals · Rain · Snow
Sunshine · Freeze dates · Records · Best time to visit
What is the weather like in Kostroma, Kostroma Oblast?
Kostroma, Kostroma Oblast gets 610 mm of precipitation a year over about 171 rainy days. July is the warmest month (average high 24°C) and January the coldest (average low -12°C).
Humid continental climate
Kostroma, Kostroma Oblast has warm summers and cold winters. Daytime highs range from about -6°C in January to 24°C in July. June is usually the wettest month. The most comfortable time to visit is typically May and July to August, when daytime highs sit near 21°C.
| Season | Months | Avg low | Avg high |
|---|---|---|---|
| Winter | Dec–Feb | -11° | -5° |
| Spring | Mar–May | 1° | 10° |
| Summer | Jun–Aug | 12° | 23° |
| Autumn | Sep–Nov | 2° | 8° |
How much rain does Kostroma get?
Kostroma gets 610 mm of precipitation in an average year, spread over about 171 days with measurable rain. That is more rainy days than 80% of Russia.
June is the wettest month, with 76 mm. February is the driest, with 29 mm. January has the most rainy days, about 21.
Kostroma weather by month
Kostroma weather in January
In January, Kostroma averages a high of -6°C and a low of -12°C. It gets 41 mm of precipitation over about 21 rainy days. Estimated sunshine is 8% of daylight hours, derived from ERA5 cloud cover. The January record high is 7°C (2007) and the record low is -42°C (1987).
Kostroma weather in February
In February, Kostroma averages a high of -5°C and a low of -11°C. It gets 29 mm of precipitation over about 15 rainy days. Estimated sunshine is 16% of daylight hours, derived from ERA5 cloud cover. The February record high is 7°C (2020) and the record low is -35°C (2006).
Kostroma weather in March
In March, Kostroma averages a high of 1°C and a low of -6°C. It gets 31 mm of precipitation over about 13 rainy days. Estimated sunshine is 34% of daylight hours, derived from ERA5 cloud cover. The March record high is 18°C (2007) and the record low is -27°C (2021).
Kostroma weather in April
In April, Kostroma averages a high of 10°C and a low of 1°C. It gets 34 mm of precipitation over about 11 rainy days. Estimated sunshine is 40% of daylight hours, derived from ERA5 cloud cover. The April record high is 27°C (2000) and the record low is -16°C (1998).
Kostroma weather in May
In May, Kostroma averages a high of 18°C and a low of 7°C. It gets 49 mm of precipitation over about 11 rainy days. Estimated sunshine is 42% of daylight hours, derived from ERA5 cloud cover. The May record high is 32°C (2015) and the record low is -4°C (1978). May is one of the most comfortable months to visit.
Kostroma weather in June
In June, Kostroma averages a high of 22°C and a low of 11°C. It gets 76 mm of precipitation over about 13 rainy days. Estimated sunshine is 53% of daylight hours, derived from ERA5 cloud cover. The June record high is 33°C (1999) and the record low is -1°C (2017).
Kostroma weather in July
In July, Kostroma averages a high of 24°C and a low of 14°C. It gets 72 mm of precipitation over about 12 rainy days. Estimated sunshine is 46% of daylight hours, derived from ERA5 cloud cover. The July record high is 37°C (2010) and the record low is 3°C (2015). July is one of the most comfortable months to visit.
Kostroma weather in August
In August, Kostroma averages a high of 22°C and a low of 12°C. It gets 73 mm of precipitation over about 12 rainy days. Estimated sunshine is 46% of daylight hours, derived from ERA5 cloud cover. The August record high is 37°C (2010) and the record low is 1°C (2015). August is one of the most comfortable months to visit.
Kostroma weather in September
In September, Kostroma averages a high of 16°C and a low of 7°C. It gets 58 mm of precipitation over about 12 rainy days. Estimated sunshine is 33% of daylight hours, derived from ERA5 cloud cover. The September record high is 28°C (2002) and the record low is -6°C (1996).
Kostroma weather in October
In October, Kostroma averages a high of 7°C and a low of 2°C. It gets 60 mm of precipitation over about 15 rainy days. Estimated sunshine is 19% of daylight hours, derived from ERA5 cloud cover. The October record high is 23°C (1999) and the record low is -16°C (2014).
Kostroma weather in November
In November, Kostroma averages a high of 0°C and a low of -4°C. It gets 49 mm of precipitation over about 16 rainy days. Estimated sunshine is 9% of daylight hours, derived from ERA5 cloud cover. The November record high is 14°C (2013) and the record low is -29°C (1984).
Kostroma weather in December
In December, Kostroma averages a high of -4°C and a low of -9°C. It gets 40 mm of precipitation over about 19 rainy days. Estimated sunshine is 9% of daylight hours, derived from ERA5 cloud cover. The December record high is 9°C (2008) and the record low is -44°C (1978).
Sunshine, humidity and wind in Kostroma
June is the sunniest month in Kostroma, with estimated sunshine of 53% of daylight hours from ERA5 cloud cover. January is the cloudiest, at 8%. The annual cloud-cover estimate is 30% of daylight hours; it is not a measurement of sunshine duration. Kostroma is cloudier than 65% of Russia.
Humidity peaks in December at 88% and is lowest in April at 60%.
Kostroma has about 5 days a year above 32°C. Kostroma is hotter than 66% of Russia.
First and last freeze in Kostroma
The first fall freeze in Kostroma typically comes around October 1, and the last spring freeze around May 2. That leaves a frost-free growing season of about 152 days.
Kostroma weather records
These records cover KOSTROMA during 1970–2025. Earlier records or other stations in the city may differ.
The hottest temperature on record at the Kostroma station is 37°C, on July 29, 2010. The coldest is -44°C, on December 31, 1978.
The wettest day in the available station history brought 80 mm of precipitation, on June 28, 1997.
43 all-time records have been set at the station since 1970.
The annual mean temperature has changed by +0.3°C per decade since 1970.
The best time to visit Kostroma
The most comfortable time to visit is typically May and July to August, when daytime highs sit near 21°C.
Winter (December–February) is cold, with average highs around -5°C and lows near -11°C.
Spring (March–May) is chilly, with average highs around 10°C and lows near 1°C.
Summer (June–August) is warm, with average highs around 23°C and lows near 12°C. It can feel humid.
Autumn (September–November) is chilly, with average highs around 8°C and lows near 1°C.
Monthly climate
| Month | Average low | Average high | Precip | Rain days | Humidity | Estimated sunshine | Record high | Record low |
|---|---|---|---|---|---|---|---|---|
| January | -12° | -6° | 41 mm | 21 | 86% | 8% | 7° | -42° |
| February | -11° | -5° | 29 mm | 15 | 83% | 16% | 7° | -35° |
| March | -6° | 1° | 31 mm | 13 | 71% | 34% | 18° | -27° |
| April | 1° | 10° | 34 mm | 11 | 60% | 40% | 27° | -16° |
| May | 7° | 18° | 49 mm | 11 | 60% | 42% | 32° | -4° |
| June | 11° | 22° | 76 mm | 13 | 65% | 53% | 33° | -1° |
| July | 14° | 24° | 72 mm | 12 | 69% | 46% | 37° | 3° |
| August | 12° | 22° | 73 mm | 12 | 73% | 46% | 37° | 1° |
| September | 7° | 16° | 58 mm | 12 | 77% | 33% | 28° | -6° |
| October | 2° | 7° | 60 mm | 15 | 82% | 19% | 23° | -16° |
| November | -4° | 0° | 49 mm | 16 | 87% | 9% | 14° | -29° |
| December | -9° | -4° | 40 mm | 19 | 88% | 9% | 9° | -44° |
Station: KOSTROMA, 6 km from the city. Temperature normal baseline: 1991–2020, calculated from available NOAA GHCN-Daily observations. Available station history: 1970–2025; record values refer to this station and period, not the entire city’s history. Precipitation includes rain and the water equivalent of frozen precipitation; snowfall depth is shown separately when available. Sources and methods
From ERA5 reanalysis. Sunshine is estimated from cloud cover.
Kostroma climate questions
How much rain does Kostroma get?
Kostroma gets 610 mm of precipitation in an average year, over about 171 rainy days.
What is the wettest month in Kostroma?
June is the wettest month in Kostroma, with 76 mm. February is the driest, with 29 mm.
How many rainy days does Kostroma have a year?
Kostroma has about 171 days with measurable rain in an average year. January has the most, about 21.
What is the hottest month in Kostroma?
July is the warmest month in Kostroma, with an average high of 24°C.
What is the coldest month in Kostroma?
January is the coldest month in Kostroma, with an average low of -12°C.
What is the record high temperature in Kostroma?
Within the available 1970–2025 station history, the record high at the Kostroma station is 37°C, set on July 29, 2010. The record low is -44°C, on December 31, 1978.
What is the sunniest month in Kostroma?
June is the sunniest month in Kostroma, with estimated sunshine of 53% of daylight hours from ERA5 cloud cover. January is the cloudiest.
When is the first frost in Kostroma?
The first fall freeze in Kostroma typically comes around October 1. The last spring freeze is around May 2.
What is the best time to visit Kostroma?
The most comfortable time to visit is typically May and July to August, when daytime highs sit near 21°C.