Climate Chart of Martha's Vineyard, USA

Monthly data: Temperature °C, Rain (mm), Sunshine (h) · 2013–2023

Climate overview

Temperature

The coolest monthly mean temperatures occur in January / February, at 1.5 °C; the warmest monthly means are shared by July / August, at 22.0 °C. The unweighted mean across calendar-month means is 11.3 °C. These are monthly averages, not daytime maximum temperatures, and cannot indicate the temperature visitors will experience on a particular day.

Rain

Mean daily rainfall reaches its highest monthly value in October, at 4.39 mm/day, while March has the lowest, at 2.38 mm/day. The unweighted mean across calendar-month means is 3.05 mm/day. These are daily average amounts, not monthly totals; they do not show how often rain falls or guarantee dry weather in the month with the lowest average.

Sunshine

Mean daily sunshine duration is highest in July, at 11.21 hours/day, and lowest in December, at 5.06 hours/day. Across calendar-month means, the unweighted mean is 8.27 hours/day per day. These averages can help with broad outdoor-planning expectations, but sunshine duration is not the same as day length and does not promise clear skies on a given date.

Snow

Mean daily snowfall is highest in February, at 10.36 mm/day; the unweighted mean across calendar-month means is 2.32 mm/day. These amounts describe daily averages, not monthly totals, and do not establish how many days have snow, snow depth, or whether snow cover persists.

Best Travel Time Guide for Martha's Vineyard, USA: Ideal Seasons and Weather Insights

For visitors prioritising cooler monthly averages, January / February is the relevant option: its monthly mean temperature is 1.5 °C. That average is not a daily forecast or a daytime high, so check conditions close to travel and pack for variability. If lower average rainfall is a priority, March is the conditional option, with mean daily rainfall of 2.38 mm/day. This does not guarantee rain-free days or reveal rain frequency; plan to adapt outdoor activities and bring suitable rain protection. For preparation, note that the highest mean daily rainfall occurs in October, at 4.39 mm/day.

For daylight outdoor planning, mean daily sunshine duration is highest in July, at 11.21 hours/day, and lowest in December, at 5.06 hours/day. These are averages, not a promise of sunshine on a particular day, and sunshine duration does not measure day length. The sunshine and rainfall criteria point to different planning considerations rather than one universal best time to visit. The highest monthly mean daily snowfall is recorded in February, at 10.36 mm/day. This average alone cannot tell you whether snow will fall during a visit or establish snow depth or cover, so it should not be used as a guide to snow-dependent activities.

Climate Data Overview for Martha's Vineyard, USA

Explore the comprehensive climate data for Martha's Vineyard, USA. This detailed table provides valuable insights into temperature variations, precipitation levels, and seasonal changes, helping you understand the unique weather patterns of this region.

• See also climate change in Martha's Vineyard
• Explore the climate in USA