Gresham, United States — Weather in May 2027

Climate Overview

Gresham, United States in May has mild conditions, with highs averaging 19.9°C (68°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 19°C (65°F) at the start to 22°C (71°F) by month's end.

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

Expect around 10.0h of sunshine at the start of May, increasing to 11.6h by the end.

The warmest days tend to fall around the 29th, averaging 22.3°C (72°F).

Compared to April, this month is about 4°C warmer with 5 fewer rainy days. Temperatures will rise further into June.

Monthly May Averages

Temperature

20°C / 9°C

Feels Like

19°C / 7°C

Rain

11 days · 75 mm

Sunshine

10.8h / day

Humidity

73% — Humid

Wind

12 km/h

Wind Direction

W (278°)

Gusts

33 km/h

Daylight

14.9 h

Cloud Cover

63%

Clear Sky Days

3.9

UV Index

6.1 — High

Dew Point

10°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 05:40

Daylight 14.9h

Sunset 20:34

Compare Months

2days (6 mm) Excellent

2days (11 mm) Excellent

Month	Temp	Feels Like	Rain	Sun	Humidity	UV	Status	Details
January	8°C / 2°C	5°C / -2°C	19days (224 mm) Wet	4.4h Fair	86% Very Muggy	1.6 Low	Wet	View Details
February	8°C / 1°C	6°C / -2°C	18days (193 mm) Wet	5.5h Fair	85% Humid	2.3 Moderate	Wet	View Details
March	12°C / 3°C	9°C / -1°C	20days (174 mm) Wet	7.4h Good	83% Humid	3.7 Moderate	Wet	View Details
April	16°C / 5°C	14°C / 2°C	16days (138 mm) Wet	9.1h Good	77% Humid	5.4 High	Fair	View Details
May	20°C / 9°C	19°C / 7°C	11days (75 mm) Wet	10.8h Excellent	73% Muggy	6.1 High	Good	View Details
June best	24°C / 12°C	23°C / 11°C	9days (61 mm) Wet	12.1h Excellent	69% Muggy	6.7 High	Excellent	View Details
July best	28°C / 14°C	28°C / 14°C	2days (6 mm) Excellent	13.2h Excellent	60% Moderate	7.3 Very High	Excellent	View Details
August best	29°C / 15°C	29°C / 15°C	2days (11 mm) Excellent	11.9h Excellent	59% Moderate	6.4 High	Excellent	View Details
September best	25°C / 12°C	24°C / 12°C	8days (58 mm) Wet	9.9h Good	68% Muggy	5 Moderate	Excellent	View Details
October	17°C / 8°C	16°C / 6°C	14days (163 mm) Wet	7.2h Good	79% Humid	3.2 Moderate	Good	View Details
November	11°C / 5°C	9°C / 2°C	18days (218 mm) Wet	5.2h Fair	86% Very Muggy	1.9 Low	Wet	View Details
December	8°C / 2°C	5°C / -1°C	20days (258 mm) Wet	4h Fair	88% Very Muggy	1.2 Low	Wet	View Details

What to Wear

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

Temperatures drop significantly at night, so pack layers you can add or remove throughout the day.

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 Gresham?

May is typically good for visiting Gresham, with average highs of 20°C (68°F) and around 11 rainy days. Gresham, United States in May has mild conditions, with highs averaging 19.9°C (68°F) and noticeably cooler mornings. Ra

Does it rain a lot in Gresham in May?

Gresham typically sees around 11 rainy days in May with 75 mm (3 in) of total rainfall. Pack a waterproof jacket.

Does it get cold at night in Gresham in May?

Nights in Gresham during May are cool at around 9°C (47°F). Bring a jacket or sweater for evenings.

What should I pack for Gresham in May?

With highs of 20°C (68°F) and lows of 9°C (47°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 Gresham?

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

What is the UV index in Gresham in May?

The average UV index in Gresham 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 Gresham in May?

Gresham gets approximately 15 hours of daylight per day in May, with around 11 hours of sunshine.

Does it snow in Gresham in May?

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

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