Kostroma climate

Name: Kostroma
Address: RU

Kostroma is warmest in July, with average highs of 23 °C, and coldest in January, when nights average -11 °C. June is the wettest month (74 mm) and February the driest (32 mm). Figures are 1991–2020 climate normals.

Across a full year Kostroma averages 650 mm of rain, 19 days above 25 °C and 169 days below freezing.

Russia · population 277,280 · 1991–2020 normals

Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month

Warmest month July 23 °C
Coldest month January -11 °C
Driest month February 32 mm
Wettest month June 74 mm
Least cloud July 59 % cloud
Hottest on record August 36 °C
Coldest on record January -37 °C

What to expectKostroma through the year

Kostroma has a clear annual cycle: average daily highs run from -6.5 °C in January to 23 °C in July, a swing of 28 °C in mean temperature across the year.

Counted across a normal year, 19 days a year reach 25 °C, 2 of them reach 30 °C, 169 nights drop below freezing. The warmest reading in the 1991–2020 record is 36 °C, in August.

Rain is strongly seasonal. June averages 74 mm against 32 mm in February — 2.3 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	-6.5 °C	42 mm	91 %
February	-6.0 °C	32 mm	84 %
March	-0.4 °C	35 mm	72 %
April	8.3 °C	40 mm	66 %
May	16.1 °C	60 mm	60 %
June	20.1 °C	74 mm	61 %
July	22.5 °C	73 mm	59 %
August	20.2 °C	70 mm	62 %
September	14.4 °C	65 mm	72 %
October	6.8 °C	65 mm	81 %
November	-0.6 °C	50 mm	89 %
December	-4.5 °C	43 mm	92 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C	Days below 0 °C
January	-6.5 °C	-11.5 °C	-8.8 °C	6.1 °C	-36.8 °C	0	0	30
February	-6.0 °C	-11.4 °C	-8.5 °C	4.3 °C	-35.8 °C	0	0	28
March	-0.4 °C	-7.2 °C	-3.6 °C	15.4 °C	-24.0 °C	0	0	29
April	8.3 °C	-0.9 °C	4.0 °C	23.5 °C	-16.7 °C	0	0	19
May	16.1 °C	6.5 °C	11.9 °C	31.7 °C	-4.0 °C	1	0	2
June	20.1 °C	11.5 °C	16.4 °C	32.0 °C	0.8 °C	5	0	0
July	22.5 °C	14.5 °C	18.9 °C	34.4 °C	5.4 °C	9	1	0
August	20.2 °C	12.5 °C	16.6 °C	36.2 °C	3.1 °C	4	0	0
September	14.4 °C	7.8 °C	11.2 °C	26.6 °C	-4.1 °C	0	0	0
October	6.8 °C	2.0 °C	4.5 °C	19.3 °C	-20.2 °C	0	0	10
November	-0.6 °C	-4.2 °C	-2.2 °C	12.5 °C	-28.4 °C	0	0	23
December	-4.5 °C	-8.8 °C	-6.5 °C	9.0 °C	-35.9 °C	0	0	29

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	42 mm	11	7.3 h/day	91 %	85 %	19 km/h
February	32 mm	8	9.4 h/day	84 %	83 %	19 km/h
March	35 mm	9	12 h/day	72 %	81 %	19 km/h
April	40 mm	9	14 h/day	66 %	73 %	18 km/h
May	60 mm	11	17 h/day	60 %	68 %	18 km/h
June	74 mm	12	18 h/day	61 %	71 %	17 km/h
July	73 mm	12	17 h/day	59 %	73 %	16 km/h
August	70 mm	12	15 h/day	62 %	75 %	16 km/h
September	65 mm	11	13 h/day	72 %	79 %	18 km/h
October	65 mm	12	10 h/day	81 %	82 %	19 km/h
November	50 mm	11	8.0 h/day	89 %	85 %	18 km/h
December	43 mm	10	6.6 h/day	92 %	86 %	19 km/h

How Kostroma compares

The same four figures for nearby destinations, so the numbers above have something to be read against. Summer high is the warmest month's average high; winter low is the coldest month's average low.

Destination	Summer high	Winter low	Rain per year	Days above 25 °C
Kostroma	23 °C	-11 °C	650 mm	19
Yaroslavl · Russia	23 °C	-11 °C	648 mm	20
Rybinsk · Russia	22 °C	-10 °C	666 mm	16
Vologda · Russia	22 °C	-12 °C	640 mm	14
Vladimir · Russia	23 °C	-11 °C	615 mm	24
Cherepovets · Russia	21 °C	-11 °C	666 mm	11
Nizhniy Novgorod · Russia	23 °C	-12 °C	605 mm	28

Where Kostroma ranks

Ranking	Position	Value
The coolest places in Europe in September	34th of 50	14 °C
The coolest places in Europe in October	37th of 50	6.8 °C
The coolest places in Europe in April	40th of 50	8.3 °C
The coolest places in Europe year-round	45th of 50	7.5 °C
The coolest places in the world in October	45th of 50	6.8 °C
The coolest places in the world in September	45th of 50	14 °C

Planning a trip? See the best time to visit Kostroma.

QuestionsCommon questions about Kostroma’s climate

When is the best time to visit Kostroma?

That depends on what you want, so the honest answer is a comparison rather than a single month. June, July, August sit closest to 20 °C on average, July is the warmest month and February the driest. The month-by-month table above has the full picture.

How hot does Kostroma get?

In July, the warmest month, daily highs average 23 °C. About 2 days a year pass 30 °C. The highest value in the 1991–2020 record is 36 °C.

How cold does it get in winter?

Nights average -11 °C in January, the coldest month. A normal year has 169 nights below freezing.

Which month is wettest in Kostroma?

June, averaging 74 mm over 12 days with rain. The driest month is February with 32 mm. The year as a whole averages 650 mm.

Are these figures a forecast?

No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Kostroma rather than what any particular week will bring. Individual years can differ substantially from the normal.

Data sources and method

ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
Open-Meteo — Open-Meteo.com. CC BY 4.0
NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
GeoNames — GeoNames.org. CC BY 4.0

Normal period: 1991–2020
Data point: 57.766°, 40.928° (the coordinates the reanalysis values are taken for)
Dataset version: era5-1991-2020-scores1.1
Last processed: 1 August 2026

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.