Sirajganj climate — normals and trends
Sirajganj (Bangladesh) has a humid subtropical, dry winter climate (Cwa) under the Köppen-Geiger classification. Its mean annual temperature is 25.2 °C and it receives 1,960 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 (28.6 °C on average) and the coldest is January (17.9 °C). Rainfall peaks in June.
Sirajganj averages 0 frost days, 202 hot days (≥ 30 °C) and 173 rainy days per year.
Sirajganj has warmed by +0.8 °C between 1940 and 2025, or +0.10 °C per decade. This trend is statistically significant.
The hottest day of the period reached 44.7 °C (on 27 May 1957) and the coldest 5.2 °C (on 11 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
SirajganjRajshahi Division
- coords
- 24.46°, 89.71°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
25.2°C
Average daily high
30.0°C
Average daily low
21.3°C
Annual rainfall
1,960mm
Sunshine / day
9.2h
Mean relative humidity
78%
Average peak wind
12.8km/h
Seasonal range
10.7°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
202 d/yr
Rainy days (≥ 1 mm)
173 d/yr
Annual snowfall
0.0 cm
Average feels-like high
33.7 °C
Average feels-like low
24.2 °C
Average peak gust
26.9 km/h
Tropical nights (≥ 20 °C)
235 d/yr
Solar radiation
16.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+0.8 °C
since 1940
+0.1 °C per decade · r² = 0.30 · 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
44.7 °C
27 May 1957
Coldest day
5.2 °C
11 January 2013
Wettest day
241 mm
15 May 2004
Windiest day
53.6 km/h
27 May 2024
Strongest gust
105.5 km/h
27 May 2024
Hottest feels-like
48.4 °C
26 May 1957
Coldest feels-like
3.8 °C
9 January 2013
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 | 24.2 °C | -0.3 °C | 1 mm | -10 mm |
| Feb | 28.0 °C | +0.3 °C | 7 mm | -14 mm |
| Mar | 31.9 °C | +0.1 °C | 8 mm | -42 mm |
| Apr | 32.7 °C | -0.6 °C | 179 mm | +28 mm |
| May | 32.9 °C | +0.4 °C | 311 mm | +1 mm |
| Jun | 32.9 °C | +1.0 °C | 279 mm | -94 mm |
| Jul | 32.2 °C | +0.8 °C | 353 mm | +14 mm |
| Aug | 32.1 °C | +0.6 °C | 269 mm | -22 mm |
| Sep | 33.1 °C | +1.8 °C | 239 mm | -10 mm |
| Oct | 32.1 °C | +1.8 °C | 92 mm | -45 mm |
| Nov | 29.2 °C | +1.0 °C | 17 mm | -6 mm |
| Dec | 24.4 °C | -1.0 °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 Sirajganj?
Sirajganj has a humid subtropical, dry winter climate (Köppen Cwa). Over 1940-2025, the average annual temperature is 25.2 °C and it receives 1,960 mm of precipitation per year.
What is the hottest day ever recorded in Sirajganj?
The hottest day measured in Sirajganj between 1940 and 2025 was 27 May 1957, reaching 44.7 °C.
What is the coldest day in Sirajganj?
The coldest day measured in Sirajganj between 1940 and 2025 was 11 January 2013, at 5.2 °C.
Does it snow in Sirajganj?
Almost never: Sirajganj sees virtually no snow, with about 0 frost days per year.
Has the climate of Sirajganj warmed?
Yes: Sirajganj warmed by +0.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Sirajganj?
The wettest day measured in Sirajganj between 1940 and 2025 was 15 May 2004, with 241 mm of rain in 24 hours.
What was the windiest day in Sirajganj?
The windiest day measured in Sirajganj between 1940 and 2025 was 27 May 2024, with winds reaching 53.6 km/h.
What is the warmest month in Sirajganj?
The warmest month in Sirajganj is June (28.6 °C on average); the coldest is January (17.9 °C).
How much does it rain in Sirajganj?
Sirajganj receives on average 1,960 mm of precipitation per year, spread over about 173 rainy days.
Is it sunny in Sirajganj?
Sirajganj gets on average 9.2 hours of sunshine per day, roughly 3,358 hours per year over 1940-2025.
Are there tropical nights in Sirajganj?
Yes: Sirajganj has on average 235 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Sirajganj?
In Sirajganj, between 1940 and 2025, the highest apparent temperature reached 48.4 °C on 26 May 1957, and the lowest was 3.8 °C on 9 January 2013.
Compare Sirajganj with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Sirajganj