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Barnstable County

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Barnstable County Weather, Climate and Best Time to Visit

Data source:Meteostat
Update date:2025-09

Barnstable County year round climate

  • Spring (March–May): Average 4.9–13.3°C, mild and rainy with occasional showers. March and April experience more rainfall. Common activities: Coastal walks, flower viewing. Suggested attire: Light jacket, comfortable long pants or skirt, rain gear.
  • Summer (June–August): Average 18.4–23.3°C, warm and humid with occasional showers. July is the warmest month. Common activities: Beach activities, water sports, outdoor picnics. Suggested attire: Light and breathable short-sleeved clothing, shorts, swimwear, sun hat.
  • Autumn (September–November): Average 13.0–18.2°C, comfortable and pleasant. September has the most rainfall. Common activities: Maple leaf viewing, hiking, seaside strolls. Suggested attire: Comfortable long-sleeved shirts, light jacket, comfortable pants.
  • Winter (December–February): Average 1.4–3.3°C, cold and dry with low probability of snowfall. December and January experience more rainfall. Common activities: Indoor activities, museum visits. Suggested attire: Warm coat, hat, scarf, gloves.

Barnstable County climatological average

Annual average temperature: approx. 11°C / Annual rainfall: approx. 1286 mm / Summer humidity: 65%–75% / Rainiest month: September

Barnstable County monthly average temperature and precipitation

Month
Air temperature (°C)
Precipitation (mm)
January
1.4°C
118
February
1.6°C
55.7
March
4.9°C
125
April
8.8°C
133
May
13.3°C
84
June
18.4°C
52.7
July
23.3°C
119.7
August
21.9°C
129.3
September
18.2°C
168.7
October
13°C
76
November
7.9°C
80
December
3.3°C
144.3

Barnstable County weather for the next seven days

5/5
Tuesday
Sunny
19.5°C/9°C
5/6
Wednesday
Patchy rain nearby
16.5°C/13.1°C
5/7
Thursday
Patchy rain nearby
14.6°C/10.2°C
5/8
Friday
Partly Cloudy
14.6°C/8.4°C
5/9
Saturday
Moderate rain
14.5°C/10.5°C
5/10
Sunday
Patchy rain nearby
17.1°C/10.5°C
5/11
Monday
Patchy rain nearby
9.6°C/8.9°C