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Weather & Climate in Nan, Thailand
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Nan has a warm climate with an average annual temperature of 79°F (26°C). Winters average 71°F in January while summers reach 82°F in July / relatively mild seasonal variation. The area gets 252 sunny days per year, above the national average. Annual precipitation totals 46.5 inches (wetter than the 38-inch national average). The city sits at an elevation of 673 feet.
Temperature
71°F Jan (22°C)
82°F Jul (28°C)
| Annual Average | 78.6°F |
| 46% above US avg | |
| January Average | 71°F (22°C) |
| July Average | 82°F (28°C) |
| Sunny Days | 252 days/yr |
Geography
| Elevation | 673 ft (205 m) |
| Area | 301.6 sq mi (781.2 km²) |
| Population Density | 82/sq mi |
| Coordinates | 18.7838°N, 100.7790°W |
| Timezone | Asia/Bangkok |
Precipitation & Snow
Air Quality
Earthquake History
14 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.4.
| Jan 19, 2000 | 73 km NE of Chiang Klang, Thailand | M5.4 | 128 km | 33 km |
| Dec 9, 1995 | 9 km ENE of Rong Kwang, Thailand | M4.7 | 61 km | 10 km |
| Jul 7, 2021 | 53 km NE of Chiang Klang, Thailand | M4.7 | 108 km | 10 km |
| Feb 20, 2019 | 26 km SW of Mae Chai, Thailand | M4.6 | 131 km | 10 km |
| Feb 23, 2011 | 37 km S of Sainyabuli, Laos | M4.6 | 101 km | 10 km |
| Jul 2, 2002 | 44 km N of Chiang Klang, Thailand | M4.5 | 101 km | 33 km |
| May 5, 2017 | 64 km W of Luang Prabang, Laos | M4.5 | 146 km | 17 km |
| Mar 31, 1999 | 31 km NNW of Sainyabuli, Laos | M4.5 | 123 km | 10 km |
| Nov 11, 2001 | 13 km W of Pa Daet, Thailand | M4.4 | 125 km | 33 km |
| May 5, 2014 | 33 km SSW of Chiang Rai, Thailand | M4.3 | 147 km | 10 km |
| May 12, 2014 | 29 km SSW of Chiang Rai, Thailand | M4.3 | 149 km | 10 km |
| May 5, 2014 | 29 km SSW of Chiang Rai, Thailand | M4.1 | 150 km | 10 km |
| May 16, 2007 | 28 km SSE of Ban Houakhoua, Laos | M4.0 | 139 km | 10 km |
| Mar 27, 2004 | 32 km S of Nan, Thailand | M3.8 | 32 km | 13 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 71°F (22°C) | 0.1 in | Driest |
| February | 75°F (24°C) | 0.3 in | |
| March | 80°F (27°C) | 1.3 in | |
| April | 84°F (29°C) | 3.4 in | Warmest |
| May | 83°F (28°C) | 6.8 in | |
| June | 83°F (28°C) | 5.5 in | |
| July | 82°F (28°C) | 7.7 in | |
| August | 81°F (27°C) | 9.1 in | Wettest |
| September | 81°F (27°C) | 8.0 in | |
| October | 79°F (26°C) | 3.2 in | |
| November | 75°F (24°C) | 0.9 in | |
| December | 70°F (21°C) | 0.3 in | Coldest |
Nan has a seasonal temperature swing of 14°F / from 70°F in December to 84°F in April. Total annual precipitation is 46.5 inches, with August being the wettest month (9.1") and January the driest (0.1").