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Weather & Climate in Siwān, India
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Siwān has a warm climate with an average annual temperature of 77°F (25°C). Winters average 61°F in January while summers reach 84°F in July. The area gets 259 sunny days per year, above the national average. Annual precipitation totals 42.6 inches. The city sits at an elevation of 233 feet.
Temperature
61°F Jan (16°C)
84°F Jul (29°C)
| Annual Average | 77.2°F |
| 43% above US avg | |
| January Average | 61°F (16°C) |
| July Average | 84°F (29°C) |
| Sunny Days | 259 days/yr |
Geography
| Elevation | 233 ft (71 m) |
| Area | 5.0 sq mi (13.1 km²) |
| Population Density | 26,799/sq mi |
| Coordinates | 26.2210°N, 84.3561°W |
| Timezone | Asia/Kolkata |
Precipitation & Snow
Air Quality
Earthquake History
6 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.6.
| May 20, 2015 | 11 km S of Hetauda, Nepal | M4.6 | 141 km | 10 km |
| May 27, 2015 | 31 km W of Hetauda, Nepal | M4.4 | 136 km | 10 km |
| May 16, 1998 | 15 km SSW of Sagauli, India | M4.2 | 56 km | 33 km |
| May 27, 2015 | 38 km ENE of R?mnagar, India | M4.0 | 127 km | 10 km |
| Jul 2, 2002 | 10 km N of Bettiah, India | M3.9 | 77 km | 33 km |
| May 26, 2015 | 14 km SSE of Hetauda, Nepal | M3.7 | 140 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 61°F (16°C) | 0.8 in | Coldest |
| February | 65°F (19°C) | 0.4 in | |
| March | 75°F (24°C) | 0.4 in | |
| April | 85°F (29°C) | 0.3 in | |
| May | 89°F (31°C) | 1.0 in | Warmest |
| June | 88°F (31°C) | 6.0 in | |
| July | 84°F (29°C) | 11.1 in | |
| August | 84°F (29°C) | 12.1 in | Wettest |
| September | 83°F (29°C) | 7.9 in | |
| October | 80°F (26°C) | 2.3 in | |
| November | 71°F (21°C) | 0.2 in | |
| December | 63°F (17°C) | 0.1 in | Driest |
Siwān has a seasonal temperature swing of 28°F / from 61°F in January to 89°F in May. Total annual precipitation is 42.6 inches, with August being the wettest month (12.1") and December the driest (0.1").