Jacksonville records about 1308mm of rain across roughly 93 wet days a year, which is a 25% chance on an average day. September is the wettest month at 188mm (14% of the annual total) and November the driest at 48mm. Local rain type: thunderstorms. Jacksonville has intense summer thunderstorms — the Florida-Georgia coast generates powerful afternoon storms from June through September.
Chance of rain on an average day: 25%
Rainfall climatology for Jacksonville. 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 | 1308mm |
| Rain days per year | 93 |
| Odds on an average day | 25% |
| Wettest month | September — 188mm over 15 days |
| Driest month | November — 48mm over 4 days |
| Rain type | thunderstorms |
| Best dry window | October through April offers comfortable, drier conditions. |
| Worst rain window | June through September brings daily afternoon thunderstorms. |
September delivers 292% more rain than November (188mm vs 48mm). That gap is the difference between planning around showers and ignoring them.
No single month holds more than 14% of the annual total, so rain in Jacksonville is spread through the year — there is no season you can rely on being dry.
Jacksonville rain arrives in short, heavy bursts — shelter and timing matter more than gear.
Rain falls on about 15 days in September against 4 in November — 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 | 72mm | 6 | 20% | 16°C |
| February | 78mm | 6 | 20% | 16°C |
| March | 82mm | 6 | 20% | 18°C |
| April | 68mm | 5 | 17% | 22°C |
| May | 72mm | 6 | 20% | 27°C |
| June | 148mm | 11 | 37% | 31°C |
| July | 132mm | 10 | 33% | 33°C |
| August | 155mm | 12 | 40% | 33°C |
| September | 188mm | 15 | 50% | 31°C |
| October | 108mm | 8 | 27% | 27°C |
| November | 48mm | 4 | 13% | 22°C |
| December | 52mm | 4 | 13% | 18°C |
Rain probability is the chance that at least 0.2mm falls at your location — not how long it rains. For Jacksonville 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.
Jacksonville records rain on roughly 93 days a year — about a 25% chance on any given day — totalling around 1308mm.
September, with about 188mm over 15 rain days. That is 14% of the entire year's rainfall in a single month.
November is the driest month at 48mm across roughly 4 days. October through April offers comfortable, drier conditions.
Jacksonville has intense summer thunderstorms — the Florida-Georgia coast generates powerful afternoon storms from June through September.
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.