Rājbirāj climate — normals and trends
Rājbirāj (Nepal) has a humid subtropical, dry winter climate (Cwa) under the Köppen-Geiger classification. Its mean annual temperature is 24.8 °C and it receives 1,625 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 (29.5 °C on average) and the coldest is January (16.4 °C). Rainfall peaks in July.
Rājbirāj averages 0 frost days, 201 hot days (≥ 30 °C) and 143 rainy days per year.
Rājbirāj has warmed by +1.5 °C between 1940 and 2025, or +0.18 °C per decade. This trend is statistically significant.
The hottest day of the period reached 46.5 °C (on 26 May 1957) and the coldest 5.0 °C (on 5 February 1964).
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
RājbirājMadhesh
- coords
- 26.54°, 86.75°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
24.8°C
Average daily high
30.2°C
Average daily low
20.2°C
Annual rainfall
1,625mm
Sunshine / day
9.7h
Mean relative humidity
70%
Average peak wind
13.8km/h
Seasonal range
13.1°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
201 d/yr
Rainy days (≥ 1 mm)
143 d/yr
Annual snowfall
0.0 cm
Average feels-like high
32.9 °C
Average feels-like low
22.1 °C
Average peak gust
29.5 km/h
Tropical nights (≥ 20 °C)
213 d/yr
Solar radiation
16.8 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.5 °C
since 1940
+0.2 °C per decade · r² = 0.51 · 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
26 May 1957
Coldest day
5.0 °C
5 February 1964
Wettest day
341 mm
12 August 1987
Windiest day
41.7 km/h
14 April 1992
Strongest gust
84.2 km/h
17 October 1985
Hottest feels-like
48.6 °C
12 August 2019
Coldest feels-like
1.5 °C
28 January 1964
Sunniest day
13.2 h
5 June 1944
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 | 23.0 °C | -0.3 °C | 0 mm | -14 mm |
| Feb | 26.8 °C | +0.2 °C | 2 mm | -13 mm |
| Mar | 32.2 °C | -0.1 °C | 13 mm | -6 mm |
| Apr | 33.4 °C | -2.2 °C | 147 mm | +103 mm |
| May | 33.6 °C | -1.3 °C | 119 mm | +21 mm |
| Jun | 34.3 °C | +1.5 °C | 129 mm | -154 mm |
| Jul | 34.3 °C | +3.1 °C | 177 mm | -254 mm |
| Aug | 32.3 °C | +1.0 °C | 501 mm | +154 mm |
| Sep | 33.1 °C | +2.1 °C | 236 mm | -43 mm |
| Oct | 31.4 °C | +1.2 °C | 299 mm | +214 mm |
| Nov | 29.2 °C | +1.1 °C | 2 mm | -5 mm |
| Dec | 23.7 °C | -1.2 °C | 0 mm | -5 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 Rājbirāj?
Rājbirāj has a humid subtropical, dry winter climate (Köppen Cwa). Over 1940-2025, the average annual temperature is 24.8 °C and it receives 1,625 mm of precipitation per year.
What is the hottest day ever recorded in Rājbirāj?
The hottest day measured in Rājbirāj between 1940 and 2025 was 26 May 1957, reaching 46.5 °C.
What is the coldest day in Rājbirāj?
The coldest day measured in Rājbirāj between 1940 and 2025 was 5 February 1964, at 5.0 °C.
Does it snow in Rājbirāj?
Almost never: Rājbirāj sees virtually no snow, with about 0 frost days per year.
Has the climate of Rājbirāj warmed?
Yes: Rājbirāj warmed by +1.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Rājbirāj?
The wettest day measured in Rājbirāj between 1940 and 2025 was 12 August 1987, with 341 mm of rain in 24 hours.
What was the windiest day in Rājbirāj?
The windiest day measured in Rājbirāj between 1940 and 2025 was 14 April 1992, with winds reaching 41.7 km/h.
What is the warmest month in Rājbirāj?
The warmest month in Rājbirāj is May (29.5 °C on average); the coldest is January (16.4 °C).
How much does it rain in Rājbirāj?
Rājbirāj receives on average 1,625 mm of precipitation per year, spread over about 143 rainy days.
Is it sunny in Rājbirāj?
Rājbirāj gets on average 9.7 hours of sunshine per day, roughly 3,540 hours per year over 1940-2025.
Are there tropical nights in Rājbirāj?
Yes: Rājbirāj has on average 213 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Rājbirāj?
In Rājbirāj, between 1940 and 2025, the highest apparent temperature reached 48.6 °C on 12 August 2019, and the lowest was 1.5 °C on 28 January 1964.
Compare Rājbirāj with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Rājbirāj