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Weather & Climate in Trn, Bosnia and Herzegovina
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Trn experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 33°F in January while summers reach 69°F in July. The area gets 266 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 38.5 inches. The area receives 5.6 inches of snow annually. The city sits at an elevation of 443 feet.
Temperature
33°F Jan (0°C)
69°F Jul (21°C)
| Annual Average | 51.8°F |
| 4% below US avg | |
| January Average | 33°F (0°C) |
| July Average | 69°F (21°C) |
| Sunny Days | 266 days/yr |
Geography
| Elevation | 443 ft (135 m) |
| Area | 142.4 sq mi (368.8 km²) |
| Population Density | 53/sq mi |
| Coordinates | 44.8583°N, 17.2358°W |
| Timezone | Europe/Sarajevo |
Precipitation & Snow
Air Quality
Earthquake History
442 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.6.
| Nov 27, 1990 | 10 km N of Hrvace, Croatia | M5.6 | 122 km | 24 km |
| Nov 27, 1990 | 14 km N of Hrvace, Croatia | M5.1 | 117 km | 10 km |
| Nov 18, 2013 | 10 km ESE of Otok, Croatia | M4.9 | 136 km | 20 km |
| Aug 25, 1995 | 5 km NW of Požega, Croatia | M4.9 | 65 km | 24 km |
| Feb 20, 1996 | 11 km W of Kneževo, Bosnia and Herzegovina | M4.9 | 39 km | 10 km |
| Aug 30, 2019 | 6 km NNW of Mramor, Bosnia and Herzegovina | M4.8 | 105 km | 7 km |
| Apr 6, 2021 | 16 km NNW of Dvor, Croatia | M4.7 | 85 km | 10 km |
| Jan 6, 2021 | 3 km W of Petrinja, Croatia | M4.7 | 101 km | 10 km |
| Jun 3, 1990 | 8 km NNE of Maslovare, Bosnia and Herzegovina | M4.6 | 37 km | 10 km |
| Dec 13, 1995 | 9 km W of Živinice, Bosnia and Herzegovina | M4.6 | 36 km | 10 km |
| Feb 11, 2025 | 5 km NE of Starigrad, Croatia | M4.6 | 150 km | 10 km |
| Feb 26, 1998 | 6 km W of ?e?ava, Bosnia and Herzegovina | M4.6 | 40 km | 23 km |
| Aug 16, 2021 | 6 km NW of Petrinja, Croatia | M4.6 | 104 km | 10 km |
| Jun 17, 2011 | 14 km WNW of Hrvace, Croatia | M4.6 | 134 km | 10 km |
| May 19, 2023 | 5 km E of Srebrenik, Bosnia and Herzegovina | M4.5 | 106 km | 10 km |
| May 10, 2003 | 9 km NNW of Livno, Bosnia and Herzegovina | M4.5 | 107 km | 10 km |
| Jul 27, 2012 | 4 km SSW of Zenica, Bosnia and Herzegovina | M4.5 | 92 km | 10 km |
| May 19, 1992 | 7 km ESE of Otok, Croatia | M4.5 | 136 km | 10 km |
| May 20, 2013 | 10 km E of Livno, Bosnia and Herzegovina | M4.4 | 115 km | 10 km |
| Oct 8, 2012 | 19 km ENE of Glamo?, Bosnia and Herzegovina | M4.4 | 85 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 33°F (0°C) | 2.4 in | Coldest |
| February | 36°F (2°C) | 2.3 in | Driest |
| March | 44°F (7°C) | 2.8 in | |
| April | 52°F (11°C) | 3.4 in | |
| May | 60°F (16°C) | 3.4 in | |
| June | 66°F (19°C) | 4.1 in | Wettest |
| July | 69°F (21°C) | 3.7 in | Warmest |
| August | 69°F (20°C) | 3.4 in | |
| September | 62°F (17°C) | 3.2 in | |
| October | 53°F (12°C) | 3.3 in | |
| November | 43°F (6°C) | 3.5 in | |
| December | 35°F (2°C) | 3.2 in |
Trn has a seasonal temperature swing of 37°F / from 33°F in January to 69°F in July. Total annual precipitation is 38.6 inches, with June being the wettest month (4.1") and February the driest (2.3").