Rosera climate — normals and trends
Rosera (India) has a hot-summer mediterranean climate (Csa) under the Köppen-Geiger classification. Its mean annual temperature is 25.5 °C and it receives 1,254 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 (31.3 °C on average) and the coldest is January (16.2 °C). Rainfall peaks in July.
Rosera averages 0 frost days, 227 hot days (≥ 30 °C) and 125 rainy days per year.
Rosera has warmed by +1.0 °C between 1940 and 2025, or +0.11 °C per decade. This trend is statistically significant.
The hottest day of the period reached 46.6 °C (on 26 May 1957) and the coldest 2.9 °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
RoseraBihar
- coords
- 25.75°, 86.03°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
25.5°C
Average daily high
31.1°C
Average daily low
20.7°C
Annual rainfall
1,254mm
Sunshine / day
10.0h
Mean relative humidity
68%
Average peak wind
15.0km/h
Seasonal range
15.1°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
227 d/yr
Rainy days (≥ 1 mm)
125 d/yr
Annual snowfall
0.0 cm
Average feels-like high
33.8 °C
Average feels-like low
22.6 °C
Average peak gust
30.1 km/h
Tropical nights (≥ 20 °C)
220 d/yr
Solar radiation
17.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.0 °C
since 1940
+0.1 °C per decade · r² = 0.24 · 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
46.6 °C
26 May 1957
Coldest day
2.9 °C
9 January 2013
Wettest day
510 mm
21 September 2000
Windiest day
50.4 km/h
10 November 1995
Strongest gust
94.7 km/h
10 November 1995
Hottest feels-like
50.1 °C
9 June 2015
Coldest feels-like
0.1 °C
9 January 2013
Sunniest day
13.0 h
5 June 1979
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 | 22.0 °C | -1.2 °C | 0 mm | -19 mm |
| Feb | 27.2 °C | +0.4 °C | 0 mm | -16 mm |
| Mar | 32.2 °C | -0.7 °C | 8 mm | -11 mm |
| Apr | 35.1 °C | -2.1 °C | 54 mm | +28 mm |
| May | 35.7 °C | -1.7 °C | 51 mm | -4 mm |
| Jun | 35.9 °C | +0.5 °C | 118 mm | -63 mm |
| Jul | 34.0 °C | +1.5 °C | 185 mm | -147 mm |
| Aug | 32.8 °C | +0.6 °C | 302 mm | +24 mm |
| Sep | 33.5 °C | +1.7 °C | 230 mm | -1 mm |
| Oct | 31.2 °C | +0.3 °C | 344 mm | +262 mm |
| Nov | 28.5 °C | 0.0 °C | 0 mm | -8 mm |
| Dec | 22.3 °C | -2.5 °C | 0 mm | -7 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 Rosera?
Rosera has a hot-summer mediterranean climate (Köppen Csa). Over 1940-2025, the average annual temperature is 25.5 °C and it receives 1,254 mm of precipitation per year.
What is the hottest day ever recorded in Rosera?
The hottest day measured in Rosera between 1940 and 2025 was 26 May 1957, reaching 46.6 °C.
What is the coldest day in Rosera?
The coldest day measured in Rosera between 1940 and 2025 was 9 January 2013, at 2.9 °C.
Does it snow in Rosera?
Almost never: Rosera sees virtually no snow, with about 0 frost days per year.
Has the climate of Rosera warmed?
Yes: Rosera warmed by +1.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Rosera?
The wettest day measured in Rosera between 1940 and 2025 was 21 September 2000, with 510 mm of rain in 24 hours.
What was the windiest day in Rosera?
The windiest day measured in Rosera between 1940 and 2025 was 10 November 1995, with winds reaching 50.4 km/h.
What is the warmest month in Rosera?
The warmest month in Rosera is May (31.3 °C on average); the coldest is January (16.2 °C).
How much does it rain in Rosera?
Rosera receives on average 1,254 mm of precipitation per year, spread over about 125 rainy days.
Is it sunny in Rosera?
Rosera gets on average 10.0 hours of sunshine per day, roughly 3,650 hours per year over 1940-2025.
Are there tropical nights in Rosera?
Yes: Rosera has on average 220 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Rosera?
In Rosera, between 1940 and 2025, the highest apparent temperature reached 50.1 °C on 9 June 2015, and the lowest was 0.1 °C on 9 January 2013.
Compare Rosera with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Rosera