South Yarmouth Weather Forecast
- 63
- 75
Increasing Clouds
- 64
- 77
Slight Chance Rain Showers
- 62
- 72
Chance Rain Showers
- 63
- 79
Mostly Sunny
- 65
- 81
Partly Sunny
- 66
- 83
Partly Sunny
Today 25 Jun Barnstable
Mostly cloudy. A chance of Showers with a slight chance of Thunderstorms in the afternoon. Breezy with Highs in the lower 70s. South Winds 15 to 25 Mph. Gusts up to 30 Mph, increasing to 45 Mph in the afternoon. Chance of rain 40 percent.
Tonight 25 Jun Barnstable
Mostly cloudy. Patchy fog in the evening. Humid with Lows in the lower 60s. Southwest Winds 15 to 20 Mph with Gusts up to 40 Mph, Diminishing to 5 to 10 Mph with Gusts up to 20 Mph after midnight.
South Yarmouth Temperature Statistics
June Temperature
Hyannis, Barnstable Municipal-Boardman Airport (4.3 miles)
Lowest 2 June, 2026
37 °FAverage June
67.2 °FHighest 12 June, 2026
84 °F
Climate (2021–2026)
Hyannis, Barnstable Municipal-Boardman Airport (4.3 miles)
Average Low 2021–2026
44.8 °FAverage 2021–2026
52.4 °FAverage High 2021–2026
59.3 °F