Moab records about 228mm of rain across roughly 26 wet days a year, which is a 7% chance on an average day. October is the wettest month at 18mm (8% of the annual total) and June the driest at 4mm. Local rain type: brief showers. Moab is desert-dry — summer monsoon storms are rare but dramatic. Flash flood warnings in slot canyons must be taken seriously.
Chance of rain on an average day: 7%
Rainfall climatology for Moab. 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 | 228mm |
| Rain days per year | 26 |
| Odds on an average day | 7% |
| Wettest month | October — 18mm over 3 days |
| Driest month | June — 4mm over 1 days |
| Rain type | brief showers |
| Best dry window | March through May and September through November offer ideal desert conditions. |
| Worst rain window | July and August bring extreme heat plus monsoon flash flood risk. |
October delivers 350% more rain than June (18mm vs 4mm). That gap is the difference between planning around showers and ignoring them.
No single month holds more than 8% of the annual total, so rain in Moab is spread through the year — there is no season you can rely on being dry.
Moab rain typically comes as discrete showers, so a compact umbrella and a flexible plan are usually enough.
Rain falls on about 3 days in October against 1 in June — 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 | 12mm | 2 | 7% | 8°C |
| February | 12mm | 2 | 7% | 8°C |
| March | 16mm | 3 | 10% | 12°C |
| April | 12mm | 2 | 7% | 18°C |
| May | 8mm | 1 | 3% | 27°C |
| June | 4mm | 1 | 3% | 33°C |
| July | 14mm | 2 | 7% | 37°C |
| August | 18mm | 3 | 10% | 37°C |
| September | 10mm | 2 | 7% | 33°C |
| October | 18mm | 3 | 10% | 27°C |
| November | 10mm | 2 | 7% | 18°C |
| December | 12mm | 2 | 7% | 12°C |
Rain probability is the chance that at least 0.2mm falls at your location — not how long it rains. For Moab 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.
Moab records rain on roughly 26 days a year — about a 7% chance on any given day — totalling around 228mm.
October, with about 18mm over 3 rain days. That is 8% of the entire year's rainfall in a single month.
June is the driest month at 4mm across roughly 1 days. March through May and September through November offer ideal desert conditions.
Moab is desert-dry — summer monsoon storms are rare but dramatic. Flash flood warnings in slot canyons must be taken seriously.
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.