Sirajganj climate
Sirajganj (Bangladesh) has a monsoon-influenced humid subtropical climate (Köppen Cwa). The average temperature over the year is 25 °C78 °F, and about 2,065 mm81 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Sirajganj climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin |
|---|---|---|---|---|
| Jan | 2474 | 1151 | 1763 | 120.5 |
| Feb | 2883 | 1457 | 2170 | 180.7 |
| Mar | 3493 | 1966 | 2680 | 451.8 |
| Apr | 3697 | 2474 | 3086 | 1566.1 |
| May | 3594 | 2678 | 3086 | 27411 |
| Jun | 3290 | 2679 | 2985 | 36214 |
| Jul | 3188 | 2679 | 2984 | 38715 |
| Aug | 3188 | 2679 | 2883 | 31512 |
| Sep | 3087 | 2578 | 2882 | 28611 |
| Oct | 3085 | 2373 | 2679 | 1837.2 |
| Nov | 2781 | 1763 | 2272 | 170.7 |
| Dec | 2475 | 1355 | 1865 | 110.4 |
| Year | 3697 | 1151 | 2578 | 2,06581 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 66% | 26% | 3.5 | 10:46 |
| Feb | 53% | 23% | 4.5 | 11:18 |
| Mar | 47% | 35% | 5.3 | 11:57 |
| Apr | 59% | 53% | 5.5 | 12:42 |
| May | 71% | 66% | 5.3 | 13:19 |
| Jun | 84% | 83% | 4.6 | 13:39 |
| Jul | 88% | 88% | 4.5 | 13:31 |
| Aug | 88% | 85% | 4.6 | 12:59 |
| Sep | 88% | 74% | 4.5 | 12:15 |
| Oct | 83% | 42% | 4.4 | 11:32 |
| Nov | 79% | 19% | 4.2 | 10:55 |
| Dec | 76% | 24% | 3.4 | 10:38 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Sirajganj is like
The warmest month is May, with an average high of 35 °C94 °F and a low of 26 °C78 °F. The coldest is January, when highs average 24 °C74 °F and lows 11 °C51 °F. There is a clear seasonal cycle, with 13 °C23.5 °F between the average temperature of the warmest and the coolest month.
It is very wet, receiving about 2,065 mm81 in of precipitation per year. The wettest three-month stretch is June–August, which brings 52% of the annual total. Months with less than 20 mm0.8 in on average: November–February. The wettest month is July (387 mm15 in), the driest is December (11 mm0.4 in).
Relative humidity ranges from 47% in March to 88% in August. The clearest skies (lowest average cloud amount, 19%) are typical of November. Average wind speed near the ground ranges from 5 km/h (3 mph) in November to 10 km/h (6 mph) in July. Daylight lasts from about 10.6 hours in December to 13.6 hours in June.
Best time to visit Sirajganj
Based on these averages, the most comfortable months for sightseeing and outdoor activities are November–February. Average highs then reach 24 °C74 °F to 28 °C83 °F. Precipitation is 11 mm0.4 in to 18 mm0.7 in per month.
The most challenging month is July, which is hot, with average highs of 31 °C88 °F, very wet (387 mm15 in) and humid (88% relative humidity).
Comfort score: months are ranked by how close they come to an ideal. That means an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Sirajganj
- Winter (December–February) — highs 2474 to 28 °C83 °F, lows 1151 to 14 °C57 °F, about 13 mm0.5 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and an extra layer for the cooler mornings and evenings.
- Spring (March–May) — highs 3493 to 36 °C97 °F, lows 1966 to 26 °C78 °F, about 158 mm6.2 in of precipitation a month. Pack very light, breathable clothing, a sun hat and plenty of water and an umbrella or light rain jacket.
- Summer (June–August) — highs 3188 to 32 °C90 °F, lows around 26 °C79 °F, about 355 mm14 in of precipitation a month. Pack very light, breathable clothing, a sun hat and plenty of water and a good rain jacket or umbrella and quick-drying shoes.
- Autumn (September–November) — highs 2781 to 30 °C87 °F, lows 1763 to 25 °C78 °F, about 162 mm6.4 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and an umbrella or light rain jacket.
How Sirajganj compares
The nearest larger place is Nagarpur, about 48 km to the south. Compared with it, Sirajganj has practically the same average temperature. It receives 6% more precipitation (2,065 mm81 in vs 1,940 mm76 in).
World Climates covers 35 places in Bangladesh. By annual mean temperature, Sirajganj is the 19th warmest of them. By annual precipitation, it is the 19th wettest. See all of them on the Bangladesh climate page.
Some places in other countries have a very similar pattern of temperature and rainfall. The closest matches are Agartala (India, Cwa), Habra (India, Cwa) and Bangaon (India, Cwa).
Nearby places
- Climate in Nagarpur 48 km · 26 °C78 °F · 1,940 mm76 in
- Climate in Bogra 55 km · 25 °C78 °F · 1,792 mm71 in
- Climate in Jamalpur 57 km · 25 °C78 °F · 2,184 mm86 in
- Climate in Pabna 69 km · 26 °C78 °F · 1,656 mm65 in
- Climate in Sherpur 70 km · 25 °C78 °F · 2,184 mm86 in
- Climate in Shibganj 72 km · 25 °C78 °F · 1,792 mm71 in
- Climate in Mymensingh 78 km · 25 °C77 °F · 2,763 mm109 in
- Climate in Kushtia 86 km · 26 °C78 °F · 1,656 mm65 in
Frequently asked questions
What is the warmest month in Sirajganj?
May is the warmest month in Sirajganj. Its average high is 35 °C (94 °F) and its average low is 26 °C (78 °F).
What is the coldest month in Sirajganj?
January is the coldest month. Its average high is 24 °C (74 °F) and its average low is 11 °C (51 °F).
When does it rain the most in Sirajganj?
July is the wettest month with about 387 mm (15.2 in) of precipitation. December is the driest with about 11 mm (0.4 in).
What is the best time to visit Sirajganj?
Judging by long-term averages, the most comfortable months are November–February.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station. So they can differ from airport records. The gaps are largest on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.