Sītāmarhi climate — normals and trends
Sītāmarhi (India) has a humid subtropical, dry winter climate (Cwa) under the Köppen-Geiger classification. Its mean annual temperature is 25.2 °C and it receives 1,483 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 (31.1 °C on average) and the coldest is January (16.1 °C). Rainfall peaks in July.
Sītāmarhi averages 0 frost days, 220 hot days (≥ 30 °C) and 131 rainy days per year.
Sītāmarhi has warmed by +1.2 °C between 1940 and 2025, or +0.14 °C per decade. This trend is statistically significant.
The hottest day of the period reached 46.7 °C (on 26 May 1957) and the coldest 3.9 °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
SītāmarhiBihar
- coords
- 26.59°, 85.49°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
25.2°C
Average daily high
30.9°C
Average daily low
20.4°C
Annual rainfall
1,483mm
Sunshine / day
10.0h
Mean relative humidity
68%
Average peak wind
14.9km/h
Seasonal range
15.0°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
220 d/yr
Rainy days (≥ 1 mm)
131 d/yr
Annual snowfall
0.0 cm
Average feels-like high
33.5 °C
Average feels-like low
22.1 °C
Average peak gust
30.4 km/h
Tropical nights (≥ 20 °C)
215 d/yr
Solar radiation
17.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.2 °C
since 1940
+0.1 °C per decade · r² = 0.33 · 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
46.7 °C
26 May 1957
Coldest day
3.9 °C
9 January 2013
Wettest day
226 mm
26 September 2011
Windiest day
45.7 km/h
10 November 1995
Strongest gust
86.0 km/h
27 July 1992
Hottest feels-like
48.9 °C
21 May 1978
Coldest feels-like
1.4 °C
31 January 1964
Sunniest day
13.1 h
31 May 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 | -1.1 °C | 0 mm | -17 mm |
| Feb | 27.1 °C | +0.4 °C | 0 mm | -16 mm |
| Mar | 32.7 °C | 0.0 °C | 11 mm | -6 mm |
| Apr | 34.5 °C | -2.4 °C | 102 mm | +72 mm |
| May | 35.5 °C | -1.6 °C | 43 mm | -22 mm |
| Jun | 36.5 °C | +1.5 °C | 134 mm | -92 mm |
| Jul | 34.8 °C | +2.7 °C | 155 mm | -254 mm |
| Aug | 33.0 °C | +1.0 °C | 458 mm | +114 mm |
| Sep | 33.3 °C | +1.7 °C | 240 mm | -27 mm |
| Oct | 31.2 °C | +0.5 °C | 227 mm | +148 mm |
| Nov | 28.9 °C | +0.5 °C | 0 mm | -7 mm |
| Dec | 22.8 °C | -2.0 °C | 0 mm | -8 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 Sītāmarhi?
Sītāmarhi has a humid subtropical, dry winter climate (Köppen Cwa). Over 1940-2025, the average annual temperature is 25.2 °C and it receives 1,483 mm of precipitation per year.
What is the hottest day ever recorded in Sītāmarhi?
The hottest day measured in Sītāmarhi between 1940 and 2025 was 26 May 1957, reaching 46.7 °C.
What is the coldest day in Sītāmarhi?
The coldest day measured in Sītāmarhi between 1940 and 2025 was 9 January 2013, at 3.9 °C.
Does it snow in Sītāmarhi?
Almost never: Sītāmarhi sees virtually no snow, with about 0 frost days per year.
Has the climate of Sītāmarhi warmed?
Yes: Sītāmarhi warmed by +1.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Sītāmarhi?
The wettest day measured in Sītāmarhi between 1940 and 2025 was 26 September 2011, with 226 mm of rain in 24 hours.
What was the windiest day in Sītāmarhi?
The windiest day measured in Sītāmarhi between 1940 and 2025 was 10 November 1995, with winds reaching 45.7 km/h.
What is the warmest month in Sītāmarhi?
The warmest month in Sītāmarhi is May (31.1 °C on average); the coldest is January (16.1 °C).
How much does it rain in Sītāmarhi?
Sītāmarhi receives on average 1,483 mm of precipitation per year, spread over about 131 rainy days.
Is it sunny in Sītāmarhi?
Sītāmarhi gets on average 10.0 hours of sunshine per day, roughly 3,650 hours per year over 1940-2025.
Are there tropical nights in Sītāmarhi?
Yes: Sītāmarhi has on average 215 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Sītāmarhi?
In Sītāmarhi, between 1940 and 2025, the highest apparent temperature reached 48.9 °C on 21 May 1978, and the lowest was 1.4 °C on 31 January 1964.
Compare Sītāmarhi with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Sītāmarhi