Kalna climate — normals and trends
Kalna (India) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 25.8 °C and it receives 1,532 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 May (30.4 °C on average) and the coldest is January (18.3 °C). Rainfall peaks in July.
Kalna averages 0 frost days, 227 hot days (≥ 30 °C) and 154 rainy days per year.
Kalna has warmed by +0.7 °C between 1940 and 2025, or +0.08 °C per decade. This trend is statistically significant.
The hottest day of the period reached 46.5 °C (on 18 May 1957) and the coldest 6.1 °C (on 9 January 2013).
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
KalnaWest Bengal
- coords
- 23.22°, 88.36°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
25.8°C
Average daily high
31.0°C
Average daily low
21.6°C
Annual rainfall
1,532mm
Sunshine / day
9.6h
Mean relative humidity
74%
Average peak wind
12.6km/h
Seasonal range
12.1°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
227 d/yr
Rainy days (≥ 1 mm)
154 d/yr
Annual snowfall
0.0 cm
Average feels-like high
34.6 °C
Average feels-like low
24.5 °C
Average peak gust
27.8 km/h
Tropical nights (≥ 20 °C)
239 d/yr
Solar radiation
17.6 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+0.7 °C
since 1940
+0.1 °C per decade · r² = 0.20 · 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
46.5 °C
18 May 1957
Coldest day
6.1 °C
9 January 2013
Wettest day
208 mm
7 June 1973
Windiest day
49.5 km/h
25 May 2009
Strongest gust
100.1 km/h
25 May 2009
Hottest feels-like
49.5 °C
20 May 2002
Coldest feels-like
3.6 °C
9 January 2013
Sunniest day
12.9 h
4 June 1958
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 24.9 °C | -0.2 °C | 0 mm | -12 mm |
| Feb | 29.0 °C | +0.6 °C | 20 mm | -3 mm |
| Mar | 33.3 °C | +0.1 °C | 13 mm | -26 mm |
| Apr | 34.8 °C | -1.5 °C | 90 mm | +10 mm |
| May | 35.4 °C | -0.4 °C | 128 mm | -28 mm |
| Jun | 33.7 °C | -0.1 °C | 288 mm | +33 mm |
| Jul | 31.6 °C | -0.2 °C | 600 mm | +291 mm |
| Aug | 31.9 °C | +0.3 °C | 286 mm | +10 mm |
| Sep | 33.0 °C | +1.6 °C | 275 mm | +45 mm |
| Oct | 32.2 °C | +1.6 °C | 110 mm | -6 mm |
| Nov | 29.0 °C | +0.5 °C | 2 mm | -24 mm |
| Dec | 24.4 °C | -1.3 °C | 0 mm | -11 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 Kalna?
Kalna has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 25.8 °C and it receives 1,532 mm of precipitation per year.
What is the hottest day ever recorded in Kalna?
The hottest day measured in Kalna between 1940 and 2025 was 18 May 1957, reaching 46.5 °C.
What is the coldest day in Kalna?
The coldest day measured in Kalna between 1940 and 2025 was 9 January 2013, at 6.1 °C.
Does it snow in Kalna?
Almost never: Kalna sees virtually no snow, with about 0 frost days per year.
Has the climate of Kalna warmed?
Yes: Kalna warmed by +0.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Kalna?
The wettest day measured in Kalna between 1940 and 2025 was 7 June 1973, with 208 mm of rain in 24 hours.
What was the windiest day in Kalna?
The windiest day measured in Kalna between 1940 and 2025 was 25 May 2009, with winds reaching 49.5 km/h.
What is the warmest month in Kalna?
The warmest month in Kalna is May (30.4 °C on average); the coldest is January (18.3 °C).
How much does it rain in Kalna?
Kalna receives on average 1,532 mm of precipitation per year, spread over about 154 rainy days.
Is it sunny in Kalna?
Kalna gets on average 9.6 hours of sunshine per day, roughly 3,504 hours per year over 1940-2025.
Are there tropical nights in Kalna?
Yes: Kalna has on average 239 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Kalna?
In Kalna, between 1940 and 2025, the highest apparent temperature reached 49.5 °C on 20 May 2002, and the lowest was 3.6 °C on 9 January 2013.
Compare Kalna with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Kalna