All Countries
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. The area gets 259 sunny days per year, above the national average. 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) |
| Sunny Days | 259 days/yr |
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°W |
| 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").