Gallatin, Tennessee Weather
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Climate of Gallatin: monthly averages
Based on 25 years of satellite and reanalysis data (2001-2025), August is usually the hottest month in Gallatin, with average daytime highs around 31°C. January is the coolest, when nights typically fall to about -3°C and frost is possible on the coldest nights. That is a wide yearly range of roughly 34°C, so the seasons feel very different from each other.
The area receives about 1370 mm of rain in a typical year. Most of it falls from October to August (around 93% of the yearly total), and July is the wettest month at roughly 135 mm.
For outdoor plans and travel, September usually offers the most comfortable weather in Gallatin, with mild days and relatively little rain.
| Month | Avg high | Avg low | Rainfall | Humidity |
|---|---|---|---|---|
| Jan | 6° | -3° | 101 mm | 85% |
| Feb | 9° | -1° | 126 mm | 85% |
| Mar | 14° | 3° | 113 mm | 83% |
| Apr | 20° | 9° | 130 mm | 80% |
| May | 24° | 14° | 133 mm | 81% |
| Jun | 29° | 19° | 109 mm | 78% |
| Jul | 31° | 21° | 135 mm | 76% |
| Aug | 31° | 20° | 105 mm | 72% |
| Sep | 28° | 16° | 93 mm | 71% |
| Oct | 21° | 9° | 100 mm | 73% |
| Nov | 14° | 3° | 102 mm | 77% |
| Dec | 9° | -1° | 125 mm | 85% |
Source: NASA POWER (MERRA-2 reanalysis), averaged over the roughly 50 km grid area around Gallatin. Values describe typical conditions, not a forecast.
About Gallatin weather
Gallatin is set in Tennessee's humid subtropical climate, from the Mississippi lowlands to the Appalachian east, about 39 km north-east of Nashville. Summers bring hot, humid summers (June–August) with highs often above 32°C. The year winds down with mild-to-cool winters (December–February), colder in the eastern highlands. This page shows live, auto-refreshing weather for Gallatin: current conditions, an hourly breakdown, a 16-day outlook, a date-lookup tool for any past or future date, and real-time air quality, sourced from Open-Meteo. Local timezone: America/Chicago.
Frequently asked questions
Gallatin is about 39 km north-east of Nashville, in Tennessee.
Gallatin sees mild-to-cool winters (December–February), colder in the eastern highlands.
The live current conditions, hourly forecast and 16-day outlook above are pulled in real time for Gallatin's exact coordinates. No fixed schedule, the page updates whenever you load it.
August is usually the hottest month in Gallatin, with average daytime highs of about 31°C and nights around 20°C.
The coldest nights come in January, when the average low is about -3°C and daytime highs reach around 6°C. Frost is possible on clear, calm nights.
Gallatin receives about 1370 mm of rain in a typical year. July is the wettest month at roughly 135 mm, and the main rainy period is October to August.
September usually offers the most comfortable weather in Gallatin, with mild daytime temperatures and little rain.
In November Gallatin typically sees daytime highs near 14°C and lows near 3°C, with about 102 mm of rain over the month and average humidity around 77%. Check the live forecast above for this week's actual conditions.
Up to 16 days ahead using the extended forecast and date picker above; further-out or historical dates use the same date lookup tool.
Live temperature for Gallatin is shown at the top of this page and refreshes automatically — see the hourly breakdown below for how it changes through the day.
Gallatin's day-to-day weather follows the broader pattern of Tennessee described above. See the hourly weather forecast or the air quality index for more detail.