Hartford records about 1175mm of rain across roughly 118 wet days a year, which is a 32% chance on an average day. June is the wettest month at 102mm (9% of the annual total) and February the driest at 70mm. Local rain type: snow mix. Hartford gets substantial precipitation year-round — snow in winter, thunderstorms in summer. The Mark Twain House is the perfect rainy-day visit.
Chance of rain on an average day: 32%
Rainfall climatology for Hartford. 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 | 1175mm |
| Rain days per year | 118 |
| Odds on an average day | 32% |
| Wettest month | June — 102mm over 11 days |
| Driest month | February — 70mm over 7 days |
| Rain type | snow mix |
| Best dry window | September offers dry, crisp conditions during foliage season. |
| Worst rain window | December through February brings heavy New England snow. |
June delivers 46% more rain than February (102mm vs 70mm). That gap is the difference between planning around showers and ignoring them.
No single month holds more than 9% of the annual total, so rain in Hartford is spread through the year — there is no season you can rely on being dry.
Hartford rain typically comes as discrete showers, so a compact umbrella and a flexible plan are usually enough.
Rain falls on about 11 days in June against 7 in February — 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 | 82mm | 9 | 30% | 2°C |
| February | 70mm | 7 | 23% | 2°C |
| March | 98mm | 10 | 33% | 6°C |
| April | 96mm | 10 | 33% | 12°C |
| May | 98mm | 10 | 33% | 20°C |
| June | 102mm | 11 | 37% | 26°C |
| July | 95mm | 10 | 33% | 30°C |
| August | 95mm | 10 | 33% | 30°C |
| September | 98mm | 10 | 33% | 26°C |
| October | 95mm | 10 | 33% | 20°C |
| November | 95mm | 10 | 33% | 12°C |
| December | 88mm | 9 | 30% | 6°C |
Rain probability is the chance that at least 0.2mm falls at your location — not how long it rains. For Hartford 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.
Hartford records rain on roughly 118 days a year — about a 32% chance on any given day — totalling around 1175mm.
June, with about 102mm over 11 rain days. That is 9% of the entire year's rainfall in a single month.
February is the driest month at 70mm across roughly 7 days. September offers dry, crisp conditions during foliage season.
Hartford gets substantial precipitation year-round — snow in winter, thunderstorms in summer. The Mark Twain House is the perfect rainy-day visit.
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.