October brings 22°C daytime highs, 18mm of precipitation across about 3 wet days and 11.1 hours of daylight — best for hiking, cycling and reliable sunshine. The strongest run of the year is August to October. February is the quietest month: quiet and local, and still good for low-angle light and quiet and local.
Long-run climate normals for Chattanooga. Month ratings compare months within Chattanooga only — they are not a ranking of Chattanooga against other destinations, and they are not a forecast for a specific year.
Conditions on this page are recalculated from the latest forecast every time it is opened, for the current date in the location's own time zone. Showing .
| Best month | October — Hiking, Cycling, Reliable sunshine |
| Best 3-month window | August–October |
| Quietest month | February — Quiet and local |
| Driest month | October — 18mm |
| Wettest month | May — 102mm |
| Warmest / coolest | July 32°C / January 12°C |
| Seasonality | Strongly seasonal — the months feel like different places |
| Annual rainfall | 711mm over roughly 101 rain days |
February gets roughly 400% more precipitation than October — 90mm against 18mm. That difference, more than temperature, is what changes how a day here feels.
Daytime highs only move 20°C across the whole year (12–32°C), so timing matters far less here than rainfall does.
June gives you 14.3 hours of daylight against just 9.7 in December — a 5-hour difference in how much you can actually fit into a day.
October is the driest month at 18mm across roughly 3 wet days, while May peaks at 102mm.
September is almost as good as October, but usually quieter and cheaper. If your dates are flexible, it is the easier trip.
Chattanooga changes character completely through the year — October and February are effectively two different destinations. Pick the month that matches what you want to do, not the highest-rated one.
Ratings compare months within Chattanooga, not against destinations worldwide: five stars means the best time to be here, not that Chattanooga beats anywhere else. Tags describe what the conditions actually suit.
| Month | Rating | High / Low | Precipitation | Wet days | Sun | Daylight | Best for |
|---|---|---|---|---|---|---|---|
| January | ★★☆☆☆ | 12°C / 0°C | 78mm | 13 | 5h | 9.9h | Low-angle light · Quiet and local |
| February | ★★☆☆☆ | 13°C / 1°C | 90mm | 15 | 4h | 10.7h | Low-angle light · Quiet and local |
| March | ★★☆☆☆ | 17°C / 6°C | 90mm | 15 | 4h | 11.8h | Spring greenery · Quiet and local |
| April | ★★★★☆ | 22°C / 11°C | 66mm | 11 | 7h | 12.9h | Hiking · Cycling |
| May | ★★★★☆ | 27°C / 17°C | 102mm | 11 | 8h | 13.9h | Pool and terrace weather |
| June | ★★★★☆ | 31°C / 21°C | 57mm | 6 | 10h | 14.3h | Pool and terrace weather · Reliable sunshine |
| July | ★★★★☆ | 32°C / 22°C | 57mm | 6 | 10h | 14.1h | Pool and terrace weather · Reliable sunshine |
| August | ★★★★★ | 31°C / 21°C | 39mm | 4 | 11h | 13.3h | Pool and terrace weather · Reliable sunshine |
| September | ★★★★★ | 27°C / 17°C | 30mm | 3 | 12h | 12.2h | Pool and terrace weather · Reliable sunshine |
| October | ★★★★★ | 22°C / 11°C | 18mm | 3 | 11h | 11.1h | Hiking · Cycling · Reliable sunshine |
| November | ★★★★☆ | 17°C / 6°C | 30mm | 5 | 9h | 10.1h | Hiking · Cycling · Reliable sunshine |
| December | ★★★☆☆ | 13°C / 1°C | 54mm | 9 | 7h | 9.7h | Festive season · Hiking · Cycling |
| You are planning | Pick | Why |
|---|---|---|
| Sun & beach days | September | 12h daily sunshine, 27°C highs and only 3 rain days. |
| City walking & sightseeing | October | 22°C highs with 11.1h of daylight — long days without heat fatigue. |
| Photography & light | September | 12h of sun and 12.2h daylight give the widest window for golden-hour work. |
| Value & fewer crowds | June | Scores 75/100 — close to peak conditions but outside the busiest window. |
| Cooler-weather travel | November | 17°C highs and 6°C nights suit anyone who dislikes heat. |
Each month in Chattanooga is described from long-run climate normals and then rated relative to the other eleven months in the same city. A five-star January in a cold destination means January is one of the best times to be there — not that it beats a Mediterranean summer.
| Factor | Weight | What it measures |
|---|---|---|
| Temperature | Described | Average daytime high and overnight low for the month, shown as measured rather than judged. |
| Precipitation | Described | Monthly millimetres and wet-day count, labelled as snow or rain/snow where temperatures make that the likely phase. |
| Sunshine & daylight | Described | Average daily sunshine hours and astronomical daylight length at mid-month, from the city’s latitude. |
| “Best for” tags | Derived | Applied only when the conditions genuinely support the activity — snow depth-friendly cold for skiing, 13–24°C and low rain risk for hiking, dark evenings at high latitude for aurora. A month with few strong use cases gets fewer tags rather than padded ones. |
| Star rating | Relative | Ranks the month against the other eleven months in the same city. Never a comparison between cities. |
Figures are long-run climate averages, not a forecast for a specific year. This city has no published month-by-month normals on file, so monthly temperatures are interpolated from its summer and winter averages and rainfall is modelled from rain-day frequency.
October is the best all-round month in Chattanooga: 22°C highs, 18mm of precipitation and 11.1 hours of daylight, which suits hiking, cycling and reliable sunshine. The strongest three-month window is August to October.
February — 13°C highs, 90mm of precipitation over roughly 15 days and 10.7 hours of daylight. It is the cheapest and least crowded time to go, and it still works for low-angle light and quiet and local.
October is the driest month at 18mm over about 3 rain days, against 102mm in May. Across the year Chattanooga records around 711mm.
Yes, but the months are genuinely different trips. October suits hiking, cycling and reliable sunshine, while February suits low-angle light and quiet and local. Pick the month that matches what you want to do.
Daylight ranges from 9.7 hours in December to 14.3 hours in June, calculated from the city's latitude.