Pullman, United States — Weather in May 2027

Climate Overview

Pullman, United States in May has mild conditions, with highs averaging 19.8°C (68°F) and noticeably cooler mornings. 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 (67°F) at the start to 23°C (73°F) by month's end.

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

Expect around 11.6h of sunshine at the start of May, increasing to 13.3h by the end.

The warmest days tend to fall around the 31th, averaging 23.4°C (74°F).

Compared to April, this month is about 6°C warmer with 3 fewer rainy days. Temperatures will rise further into June.

Monthly May Averages

Temperature

20°C / 8°C

Feels Like

18°C / 5°C

Rain

7 days · 43 mm

Sunshine

12.1h / day

Humidity

59% — Moderate

Wind

17 km/h

Wind Direction

SW (218°)

Gusts

37 km/h

Daylight

15 h

Cloud Cover

53%

Clear Sky Days

5.5

UV Index

6.6 — High

Dew Point

6°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 05:16

Daylight 15h

Sunset 20:17

Compare Months

1days (4 mm) Excellent

2days (11 mm) Excellent

Month	Temp	Feels Like	Rain	Sun	Humidity	UV	Status	Details
January	3°C / -4°C	-1°C / -8°C	13days (70 mm) Wet	5.2h Fair	82% Humid	1.7 Low	Poor	View Details
February	5°C / -3°C	1°C / -8°C	13days (74 mm) Wet	6.3h Fair	77% Humid	2.5 Moderate	Poor	View Details
March	10°C / -1°C	6°C / -5°C	12days (66 mm) Wet	8.5h Good	71% Muggy	4 Moderate	Poor	View Details
April	14°C / 3°C	11°C / -1°C	10days (49 mm) Wet	10.6h Excellent	62% Muggy	5.6 High	Fair	View Details
May	20°C / 8°C	18°C / 5°C	7days (43 mm) Good	12.1h Excellent	59% Moderate	6.6 High	Good	View Details
June best	24°C / 12°C	23°C / 10°C	4days (25 mm) Good	13h Excellent	50% Moderate	7.1 Very High	Excellent	View Details
July best	30°C / 16°C	29°C / 14°C	1days (4 mm) Excellent	13.9h Excellent	36% Comfortable	7.4 Very High	Excellent	View Details
August best	30°C / 16°C	28°C / 15°C	2days (11 mm) Excellent	12.3h Excellent	39% Comfortable	6.5 High	Excellent	View Details
September best	25°C / 12°C	22°C / 10°C	4days (20 mm) Good	10.4h Excellent	49% Moderate	5.2 High	Excellent	View Details
October	16°C / 5°C	13°C / 2°C	9days (61 mm) Wet	8.3h Good	64% Muggy	3.6 Moderate	Fair	View Details
November	8°C / 1°C	5°C / -3°C	13days (81 mm) Wet	5.9h Fair	77% Humid	1.9 Low	Poor	View Details
December	3°C / -3°C	-1°C / -7°C	15days (92 mm) Wet	4.5h Fair	82% Humid	1.3 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.

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 layerUmbrellaComfortable walking shoes

Frequently Asked Questions

Expand all

Is May a good time to visit Pullman?

May is typically good for visiting Pullman, with average highs of 20°C (68°F) and around 7 rainy days. Pullman, United States in May has mild conditions, with highs averaging 19.8°C (68°F) and noticeably cooler mornings. Te

Does it rain a lot in Pullman in May?

Pullman typically sees around 7 rainy days in May with 43 mm (1.7 in) of total rainfall. An umbrella should suffice.

Does it get cold at night in Pullman in May?

Nights in Pullman during May are cool at around 8°C (46°F). Bring a jacket or sweater for evenings.

What should I pack for Pullman in May?

With highs of 20°C (68°F) and lows of 8°C (46°F) in May, we recommend: Warm evening layer, Umbrella, Comfortable walking shoes. Comfortable walking shoes are essential.

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

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

What is the UV index in Pullman in May?

The average UV index in Pullman 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 Pullman in May?

Pullman gets approximately 15 hours of daylight per day in May, with around 12 hours of sunshine.

Does it snow in Pullman in May?

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

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