Derry, United States — Weather in May 2027

Climate Overview

Derry, United States in May has mild conditions, with highs averaging 19.5°C (67°F) and noticeably cooler mornings. Rain falls on about 11 days this month. Temperatures drop noticeably between day and night.

This month falls at the end of Spring.

Daily highs in May gradually rise from around 16°C (61°F) at the start to 23°C (73°F) by month's end.

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

Expect around 7.1h of sunshine at the start of May, increasing to 9.1h by the end.

The warmest days tend to fall around the 27th, averaging 23.3°C (74°F).

Compared to April, this month is about 6°C warmer with 1 fewer rainy days. Temperatures will rise further into June.

Monthly May Averages

Temperature

20°C / 10°C

Feels Like

19°C / 7°C

Rain

11 days · 89 mm

Sunshine

9.5h / day

Humidity

71% — Humid

Wind

16 km/h

Wind Direction

W (268°)

Gusts

39 km/h

Daylight

14.7 h

Cloud Cover

65%

Clear Sky Days

3.4

UV Index

6 — High

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 05:24

Daylight 14.6h

Sunset 20:02

Compare Months

Month	Temp	Feels Like	Rain	Sun	Humidity	UV	Status	Details
January	2°C / -6°C	-3°C / -11°C	9days (85 mm) Wet	5.9h Fair	68% Muggy	2.2 Moderate	Poor	View Details
February	4°C / -6°C	-1°C / -11°C	10days (77 mm) Wet	6.8h Fair	69% Muggy	3.2 Moderate	Poor	View Details
March	8°C / -2°C	4°C / -7°C	11days (94 mm) Wet	7.8h Good	66% Muggy	4 Moderate	Poor	View Details
April	13°C / 4°C	11°C / 0°C	12days (106 mm) Wet	8.3h Good	67% Muggy	5 Moderate	Fair	View Details
May	20°C / 10°C	19°C / 7°C	11days (89 mm) Wet	9.5h Good	71% Muggy	6 High	Good	View Details
June best	25°C / 15°C	26°C / 15°C	12days (83 mm) Wet	10.6h Excellent	69% Muggy	6.4 High	Excellent	View Details
July best	29°C / 19°C	31°C / 20°C	12days (105 mm) Wet	11h Excellent	70% Muggy	6.8 High	Excellent	View Details
August best	27°C / 18°C	29°C / 19°C	10days (81 mm) Wet	10.5h Excellent	70% Muggy	6.4 High	Excellent	View Details
September best	23°C / 14°C	23°C / 14°C	8days (73 mm) Wet	8.7h Good	73% Muggy	5.1 High	Excellent	View Details
October	17°C / 9°C	15°C / 7°C	9days (104 mm) Wet	6.8h Fair	75% Muggy	3.7 Moderate	Good	View Details
November	9°C / 2°C	6°C / -2°C	9days (80 mm) Wet	6.3h Fair	71% Muggy	2.6 Moderate	Poor	View Details
December	3°C / -4°C	0°C / -8°C	10days (123 mm) Wet	5.5h Fair	72% Muggy	1.8 Low	Poor	View Details

What to Wear

Dress in layers — a mix of long sleeves, light sweaters, and a versatile jacket works best for changeable conditions.

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

Packing List

Warm evening layerUmbrellaWaterproof jacketComfortable walking shoes

Frequently Asked Questions

Expand all

Is May a good time to visit Derry?

May is typically good for visiting Derry, with average highs of 20°C (67°F) and around 11 rainy days. Derry, United States in May has mild conditions, with highs averaging 19.5°C (67°F) and noticeably cooler mornings. Rain

Does it rain a lot in Derry in May?

Derry typically sees around 11 rainy days in May with 89 mm (3.5 in) of total rainfall. Pack a waterproof jacket.

Does it get cold at night in Derry in May?

Nights in Derry during May are cool at around 10°C (49°F). Bring a jacket or sweater for evenings.

What should I pack for Derry in May?

With highs of 20°C (67°F) and lows of 10°C (49°F) in May, we recommend: Warm evening layer, Umbrella, Waterproof jacket, Comfortable walking shoes. Comfortable walking shoes are essential.

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

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

What is the UV index in Derry in May?

The average UV index in Derry during May is 6 (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 Derry in May?

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

Does it snow in Derry in May?

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

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