Weather & Climate in Long, Thailand
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Long has a warm climate with an average annual temperature of 78°F (26°C). Winters average 71°F in January while summers reach 80°F in July / relatively mild seasonal variation. Annual precipitation totals 42.5 inches. The city sits at an elevation of 456 feet.
Temperature
71°F Jan (22°C)
80°F Jul (27°C)
| Annual Average | 78.0°F |
| 44% above US avg | |
| January Average | 71°F (22°C) |
| July Average | 80°F (27°C) |
Geography
| Elevation | 456 ft (139 m) |
| Area | 302.8 sq mi (784.1 km²) |
| Population Density | 39/sq mi |
| Coordinates | 18.0742°N, 99.8307°E |
| Timezone | Asia/Bangkok |
Precipitation & Snow
Air Quality
Earthquake History
8 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 | 69 km | 10 km |
| Feb 20, 2019 | 26 km SW of Mae Chai, Thailand | M4.6 | 127 km | 10 km |
| Oct 10, 2013 | 30 km N of Chiang Mai, Thailand | M4.2 | 141 km | 35 km |
| Jun 2, 2025 | 43 km NNE of Chiang Mai, Thailand | M4.2 | 138 km | 10 km |
| Mar 27, 2004 | 32 km S of Nan, Thailand | M3.8 | 112 km | 13 km |
| Sep 1, 1990 | 58 km W of Mae Chai, Thailand | M3.7 | 148 km | 33 km |
| Jul 1, 2008 | 48 km W of Mae Chai, Thailand | M3.7 | 144 km | 10 km |
| May 7, 1994 | 13 km SSE of Mae Tha, Thailand | M3.6 | 76 km | 33 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 71°F (22°C) | 0.2 in | Driest |
| February | 75°F (24°C) | 0.4 in | |
| March | 81°F (27°C) | 0.9 in | |
| April | 84°F (29°C) | 2.6 in | Warmest |
| May | 83°F (28°C) | 6.9 in | |
| June | 81°F (27°C) | 4.8 in | |
| July | 80°F (27°C) | 5.4 in | |
| August | 80°F (27°C) | 7.4 in | |
| September | 79°F (26°C) | 7.9 in | Wettest |
| October | 78°F (26°C) | 4.6 in | |
| November | 74°F (23°C) | 1.3 in | |
| December | 70°F (21°C) | 0.3 in | Coldest |
Long has a seasonal temperature swing of 15°F / from 70°F in December to 84°F in April. Total annual precipitation is 42.5 inches, with September being the wettest month (7.9") and January the driest (0.2").