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Weather & Climate in Si Nakhon, Thailand
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Si Nakhon has a warm climate with an average annual temperature of 81°F (27°C). Winters average 74°F in January while summers reach 83°F in July / relatively mild seasonal variation. The area gets 335 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 68.3 inches (wetter than the 38-inch national average). The city sits at an elevation of 203 feet.
Temperature
74°F Jan (23°C)
83°F Jul (28°C)
| Annual Average | 81.4°F |
| 51% above US avg | |
| January Average | 74°F (23°C) |
| July Average | 83°F (28°C) |
| Sunny Days | 335 days/yr |
Geography
| Elevation | 203 ft (62 m) |
| Area | 304.0 sq mi (787.4 km²) |
| Population Density | 0/sq mi |
| Coordinates | 17.3491°N, 99.9856°W |
| Timezone | Asia/Bangkok |
Precipitation & Snow
Air Quality
Earthquake History
3 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.7.
| Dec 9, 1995 | 9 km ENE of Rong Kwang, Thailand | M4.7 | 122 km | 10 km |
| Jun 28, 2023 | 24 km NNE of Khanu Woralaksaburi, Thailand | M4.1 | 120 km | 11 km |
| May 7, 1994 | 13 km SSE of Mae Tha, Thailand | M3.6 | 140 km | 33 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 74°F (23°C) | 0.2 in | Coldest, Driest |
| February | 79°F (26°C) | 0.4 in | |
| March | 84°F (29°C) | 0.9 in | |
| April | 88°F (31°C) | 2.4 in | Warmest |
| May | 86°F (30°C) | 7.5 in | |
| June | 84°F (29°C) | 5.4 in | |
| July | 83°F (28°C) | 5.1 in | |
| August | 82°F (28°C) | 7.4 in | |
| September | 82°F (28°C) | 8.9 in | Wettest |
| October | 81°F (27°C) | 5.5 in | |
| November | 78°F (25°C) | 1.4 in | |
| December | 74°F (24°C) | 0.3 in |
Si Nakhon has a seasonal temperature swing of 14°F / from 74°F in January to 88°F in April. Total annual precipitation is 45.4 inches, with September being the wettest month (8.9") and January the driest (0.2").