Kosi climate — normals and trends
Kosi (India) has a hot semi-arid climate (BSh) under the Köppen-Geiger classification. Its mean annual temperature is 25.1 °C and it receives 738 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 June (34.2 °C on average) and the coldest is January (14.0 °C). Rainfall peaks in August.
Kosi averages 0 frost days, 226 hot days (≥ 30 °C) and 80 rainy days per year.
No statistically significant temperature trend emerges for Kosi between 1940 and 2025: over this span, year-to-year swings outweigh the climate signal.
The hottest day of the period reached 47.7 °C (on 8 June 1942) and the coldest 1.5 °C (on 10 February 1950).
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
KosiUttar Pradesh
- coords
- 27.79°, 77.44°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
25.1°C
Average daily high
31.4°C
Average daily low
19.8°C
Annual rainfall
738mm
Sunshine / day
10.4h
Mean relative humidity
58%
Average peak wind
13.7km/h
Seasonal range
20.2°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
226 d/yr
Rainy days (≥ 1 mm)
80 d/yr
Annual snowfall
0.0 cm
Average feels-like high
32.9 °C
Average feels-like low
20.5 °C
Average peak gust
28.2 km/h
Tropical nights (≥ 20 °C)
195 d/yr
Solar radiation
19.1 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
No clear trend over this period
Over a short window, year-to-year swings outweigh the climate signal. Try 86 years.
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
47.7 °C
8 June 1942
Coldest day
1.5 °C
10 February 1950
Wettest day
248 mm
3 June 2006
Windiest day
37.1 km/h
7 August 1997
Strongest gust
73.8 km/h
29 July 1992
Hottest feels-like
50.4 °C
5 June 1973
Coldest feels-like
-2.4 °C
10 February 1950
Sunniest day
13.2 h
10 June 1945
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 | 20.1 °C | -0.7 °C | 16 mm | -4 mm |
| Feb | 25.7 °C | +1.0 °C | 8 mm | -9 mm |
| Mar | 31.8 °C | +0.9 °C | 4 mm | -10 mm |
| Apr | 38.1 °C | +0.9 °C | 6 mm | -3 mm |
| May | 38.0 °C | -2.6 °C | 17 mm | +4 mm |
| Jun | 36.8 °C | -2.8 °C | 151 mm | +89 mm |
| Jul | 32.7 °C | -1.6 °C | 251 mm | +28 mm |
| Aug | 32.8 °C | +0.4 °C | 183 mm | -42 mm |
| Sep | 33.9 °C | +0.9 °C | 137 mm | +20 mm |
| Oct | 30.4 °C | -2.1 °C | 55 mm | +30 mm |
| Nov | 27.1 °C | -1.1 °C | 3 mm | -3 mm |
| Dec | 22.3 °C | -0.7 °C | 0 mm | -9 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 Kosi?
Kosi has a hot semi-arid climate (Köppen BSh). Over 1940-2025, the average annual temperature is 25.1 °C and it receives 738 mm of precipitation per year.
What is the hottest day ever recorded in Kosi?
The hottest day measured in Kosi between 1940 and 2025 was 8 June 1942, reaching 47.7 °C.
What is the coldest day in Kosi?
The coldest day measured in Kosi between 1940 and 2025 was 10 February 1950, at 1.5 °C.
Does it snow in Kosi?
Almost never: Kosi sees virtually no snow, with about 0 frost days per year.
Has the climate of Kosi warmed?
Between 1940 and 2025, no statistically significant temperature trend emerges in Kosi.
What is the wettest day in Kosi?
The wettest day measured in Kosi between 1940 and 2025 was 3 June 2006, with 248 mm of rain in 24 hours.
What was the windiest day in Kosi?
The windiest day measured in Kosi between 1940 and 2025 was 7 August 1997, with winds reaching 37.1 km/h.
What is the warmest month in Kosi?
The warmest month in Kosi is June (34.2 °C on average); the coldest is January (14.0 °C).
How much does it rain in Kosi?
Kosi receives on average 738 mm of precipitation per year, spread over about 80 rainy days.
Is it sunny in Kosi?
Kosi gets on average 10.4 hours of sunshine per day, roughly 3,796 hours per year over 1940-2025.
Are there tropical nights in Kosi?
Yes: Kosi has on average 195 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Kosi?
In Kosi, between 1940 and 2025, the highest apparent temperature reached 50.4 °C on 5 June 1973, and the lowest was -2.4 °C on 10 February 1950.
Compare Kosi with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Kosi