Issa climate — normals and trends
Issa (Russia) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 4.4 °C and it receives 616 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is July (19.1 °C on average) and the coldest is January (-10.9 °C). Rainfall peaks in July.
Issa averages 167 frost days, 7 hot days (≥ 30 °C) and 125 rainy days per year.
Issa has warmed by +2.9 °C between 1940 and 2025, or +0.34 °C per decade. This trend is statistically significant.
The number of frost days there went from about 178 to 156 per year over the period.
The hottest day of the period reached 38.7 °C (on 1 August 2010) and the coldest -41.9 °C (on 21 January 1942).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
IssaPenza Oblast
- coords
- 53.87°, 44.86°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
4.4°C
Average daily high
8.3°C
Average daily low
0.5°C
Annual rainfall
616mm
Sunshine / day
7.2h
Mean relative humidity
76%
Average peak wind
18.5km/h
Seasonal range
30.0°C
Frost days (< 0 °C)
167 d/yr
Hot days (≥ 30 °C)
7 d/yr
Rainy days (≥ 1 mm)
125 d/yr
Annual snowfall
136.5 cm
Average feels-like high
5.0 °C
Average feels-like low
-3.3 °C
Average peak gust
35.2 km/h
Tropical nights (≥ 20 °C)
1 d/yr
Solar radiation
11.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.9 °C
since 1940
+0.3 °C per decade · r² = 0.46 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
38.7 °C
1 August 2010
Coldest day
-41.9 °C
21 January 1942
Wettest day
78 mm
17 August 1976
Windiest day
51.9 km/h
19 October 1973
Strongest gust
97.2 km/h
19 October 1973
Hottest feels-like
39.4 °C
2 August 2010
Coldest feels-like
-47.9 °C
31 December 1978
Snowiest day
18.3 cm
30 November 2010
Sunniest day
16.0 h
10 June 1940
Normals computed over complete calendar years 1940–2025.
A specific year
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Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | -1.0 °C | +7.2 °C | 59 mm | +20 mm |
| Feb | -6.1 °C | +1.0 °C | 22 mm | -13 mm |
| Mar | 5.9 °C | +7.1 °C | 36 mm | -1 mm |
| Apr | 15.1 °C | +5.1 °C | 45 mm | +3 mm |
| May | 19.4 °C | +1.0 °C | 36 mm | -19 mm |
| Jun | 21.1 °C | -1.0 °C | 119 mm | +53 mm |
| Jul | 25.6 °C | +1.6 °C | 77 mm | +5 mm |
| Aug | 23.1 °C | +0.3 °C | 51 mm | -14 mm |
| Sep | 18.2 °C | +1.8 °C | 9 mm | -46 mm |
| Oct | 10.8 °C | +3.0 °C | 48 mm | -7 mm |
| Nov | 5.9 °C | +6.2 °C | 49 mm | +1 mm |
| Dec | -2.4 °C | +3.0 °C | 45 mm | -1 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Issa?
Issa has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 4.4 °C and it receives 616 mm of precipitation per year.
What is the hottest day ever recorded in Issa?
The hottest day measured in Issa between 1940 and 2025 was 1 August 2010, reaching 38.7 °C.
What is the coldest day in Issa?
The coldest day measured in Issa between 1940 and 2025 was 21 January 1942, at -41.9 °C.
Does it snow in Issa?
Yes. Issa gets on average 136.5 cm of snow per year and has around 167 frost days.
Has the climate of Issa warmed?
Yes: Issa warmed by +2.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Issa?
The wettest day measured in Issa between 1940 and 2025 was 17 August 1976, with 78 mm of rain in 24 hours.
What was the windiest day in Issa?
The windiest day measured in Issa between 1940 and 2025 was 19 October 1973, with winds reaching 51.9 km/h.
What is the warmest month in Issa?
The warmest month in Issa is July (19.1 °C on average); the coldest is January (-10.9 °C).
How much does it rain in Issa?
Issa receives on average 616 mm of precipitation per year, spread over about 125 rainy days.
Is it sunny in Issa?
Issa gets on average 7.2 hours of sunshine per day, roughly 2,628 hours per year over 1940-2025.
What is the biggest single-day snowfall in Issa?
The heaviest 24-hour snowfall measured in Issa between 1940 and 2025 was 30 November 2010, with 18.3 cm.
Are there tropical nights in Issa?
Yes: Issa has on average 1 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Issa?
In Issa, between 1940 and 2025, the highest apparent temperature reached 39.4 °C on 2 August 2010, and the lowest was -47.9 °C on 31 December 1978.
Compare Issa with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Issa