Atlanta records about 1260mm of rain across roughly 115 wet days a year, which is a 32% chance on an average day. July is the wettest month at 132mm (10% of the annual total) and October the driest at 82mm. Local rain type: thunderstorms. Atlanta's humid subtropical climate brings frequent summer thunderstorms. Always have a plan for rain from May through August.
Chance of rain on an average day: 32%
Rainfall climatology for Atlanta. The live hour-by-hour answer for today loads at the top of this page from Open-Meteo and refreshes through the day — the figures below describe a typical year, not today.
Last updated: · Live forecast data refreshes hourly.
| Annual rainfall | 1260mm |
| Rain days per year | 115 |
| Odds on an average day | 32% |
| Wettest month | July — 132mm over 12 days |
| Driest month | October — 82mm over 8 days |
| Rain type | thunderstorms |
| Best dry window | October offers the driest, most pleasant conditions with lower humidity. |
| Worst rain window | June through August brings near-daily afternoon thunderstorms, though they usually pass within an hour. |
July delivers 61% more rain than October (132mm vs 82mm). That gap is the difference between planning around showers and ignoring them.
No single month holds more than 10% of the annual total, so rain in Atlanta is spread through the year — there is no season you can rely on being dry.
Atlanta rain arrives in short, heavy bursts — shelter and timing matter more than gear.
Rain falls on about 12 days in July against 8 in October — the frequency swing matters more for planning than the millimetre totals.
Climate normals. Use them to judge whether today's live forecast at the top of the page is typical or unusual for the season.
| Month | Rainfall | Rain days | Chance on a given day | Highs |
|---|---|---|---|---|
| January | 115mm | 11 | 37% | 10°C |
| February | 108mm | 10 | 33% | 10°C |
| March | 120mm | 11 | 37% | 13°C |
| April | 86mm | 8 | 27% | 19°C |
| May | 96mm | 9 | 30% | 24°C |
| June | 105mm | 10 | 33% | 30°C |
| July | 132mm | 12 | 40% | 33°C |
| August | 100mm | 9 | 30% | 33°C |
| September | 96mm | 9 | 30% | 30°C |
| October | 82mm | 8 | 27% | 24°C |
| November | 88mm | 8 | 27% | 19°C |
| December | 107mm | 10 | 33% | 13°C |
Rain probability is the chance that at least 0.2mm falls at your location — not how long it rains. For Atlanta we combine the hourly probability curve, expected volume in millimetres, and the city's own rainfall record into a single umbrella verdict.
| Factor | Weight | What it measures |
|---|---|---|
| Hourly probability | 40% | Peak and sustained chance of measurable rain across the next 24 hours. |
| Expected volume | 30% | Total millimetres, which separates a passing shower from a genuine soaking. |
| Timing & duration | 20% | When rain starts, when it eases, and the longest continuous dry window. |
| Local rain type | 10% | Drizzle, brief showers, thunderstorms or monsoon — each needs different gear. |
Live hourly values come from Open-Meteo and refresh through the day. Monthly rainfall figures are climate normals, so they describe a typical year rather than a forecast.
Atlanta records rain on roughly 115 days a year — about a 32% chance on any given day — totalling around 1260mm.
July, with about 132mm over 12 rain days. That is 10% of the entire year's rainfall in a single month.
October is the driest month at 82mm across roughly 8 days. October offers the driest, most pleasant conditions with lower humidity.
Atlanta's humid subtropical climate brings frequent summer thunderstorms. Always have a plan for rain from May through August.
No. Probability is the chance that at least 0.2mm of rain falls at your location at some point in the period. Check the expected millimetres alongside it: 40% with 0.4mm is a passing shower, 40% with 12mm is a soaking.