Barnstable, United States — Weather in May 2027

Climate Overview

Barnstable, United States in May has mild conditions, with highs averaging 14.7°C (58°F) and noticeably cooler mornings. Rain falls on about 10 days this month. Sea temperature stays cool at 14.4°C (58°F).

This month falls at the end of Spring.

Daily highs in May gradually rise from around 13°C (55°F) at the start to 17°C (63°F) by month's end.

Rainfall is heaviest during the last third of the month, while the middle tends to be drier.

Expect around 8.7h of sunshine at the start of May, increasing to 9.6h by the end.

The warmest days tend to fall around the 29th, averaging 17.3°C (63°F).

Compared to April, this month is about 4°C warmer with 1 fewer rainy days. Temperatures will rise further into June.

Monthly May Averages

Temperature

15°C / 11°C

Feels Like

14°C / 8°C

Rain

10 days · 89 mm

Sunshine

9.8h / day

Humidity

80% — Very Humid

Wind

24 km/h

Wind Direction

SW (220°)

Gusts

44 km/h

Daylight

14.6 h

Cloud Cover

65%

Clear Sky Days

3.5

UV Index

6.5 — High

Sea Temperature

14°C

Dew Point

9°C — Dry

Moon Phase

Waxing Gibbous · 66%

Climate Charts

Daily averages based on historical data (2016–2025)

Daily Temperature

HighLow

Daily Precipitation

Rainfall

Daily Sunshine

Sunshine

Daily Wind Speed

Wind Speed

Sun Position

Sunrise 05:23

Daylight 14.5h

Sunset 19:55

Compare Months

Month	Temp	Feels Like	Rain	Sun	Humidity	UV	Status	Details
January	4°C / 0°C	-1°C / -6°C	11days (115 mm) Wet	5.8h Fair	72% Muggy	2.2 Moderate	Poor	View Details
February	5°C / 0°C	0°C / -6°C	11days (97 mm) Wet	6.6h Fair	73% Muggy	3.2 Moderate	Poor	View Details
March	7°C / 2°C	2°C / -4°C	11days (105 mm) Wet	7.9h Good	72% Muggy	4.2 Moderate	Poor	View Details
April	10°C / 6°C	7°C / 1°C	11days (99 mm) Wet	8.5h Good	75% Muggy	5.3 High	Poor	View Details
May	15°C / 11°C	14°C / 8°C	10days (89 mm) Wet	9.8h Good	80% Humid	6.5 High	Good	View Details
June best	20°C / 16°C	21°C / 15°C	9days (68 mm) Wet	11.1h Excellent	82% Humid	6.9 High	Excellent	View Details
July best	24°C / 21°C	27°C / 21°C	8days (81 mm) Wet	11.3h Excellent	84% Humid	7.1 Very High	Excellent	View Details
August best	24°C / 20°C	26°C / 21°C	8days (64 mm) Wet	10.8h Excellent	81% Humid	6.7 High	Excellent	View Details
September best	21°C / 18°C	21°C / 17°C	10days (102 mm) Wet	8.6h Good	80% Humid	5.1 High	Excellent	View Details
October	16°C / 13°C	15°C / 10°C	10days (120 mm) Wet	7.4h Good	77% Humid	4 Moderate	Good	View Details
November	11°C / 7°C	8°C / 2°C	8days (68 mm) Wet	6.6h Fair	70% Muggy	2.7 Moderate	Poor	View Details
December	6°C / 2°C	2°C / -3°C	11days (114 mm) Wet	5.4h Fair	71% Muggy	2 Low	Poor	View Details

What to Wear

Bundle up with a warm coat, scarf, and closed-toe shoes. Thermal layers underneath give flexibility between indoors and outdoors.

A waterproof jacket or compact umbrella is recommended for occasional showers.

Packing List

Layered clothingLight jacketUmbrellaWaterproof jacketComfortable walking shoes

Frequently Asked Questions

Expand all

Is May a good time to visit Barnstable?

May is typically good for visiting Barnstable, with average highs of 15°C (58°F) and around 10 rainy days. Barnstable, United States in May has mild conditions, with highs averaging 14.7°C (58°F) and noticeably cooler mornings.

Does it rain a lot in Barnstable in May?

Barnstable typically sees around 10 rainy days in May with 89 mm (3.5 in) of total rainfall. An umbrella should suffice.

Does it get cold at night in Barnstable in May?

Nights in Barnstable during May are cool at around 11°C (51°F). Bring a jacket or sweater for evenings.

What should I pack for Barnstable in May?

With highs of 15°C (58°F) and lows of 11°C (51°F) in May, we recommend: Layered clothing, Light jacket, Umbrella, Waterproof jacket, Comfortable walking shoes. Comfortable walking shoes are essential.

Is May among the best months weather-wise in Barnstable?

May is not the most favourable month weather-wise in Barnstable. Consider visiting during months with milder temperatures or less rainfall for a better experience.

What is the UV index in Barnstable in May?

The average UV index in Barnstable during May is 7 (high). Wear sunscreen SPF 30+, a hat, and sunglasses. Limit direct sun exposure between 10 AM and 4 PM.

How many hours of daylight are there in Barnstable in May?

Barnstable gets approximately 15 hours of daylight per day in May, with around 10 hours of sunshine.

Does it snow in Barnstable in May?

Snow is uncommon in Barnstable during May based on 10-year climate averages.

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