Pendleton, United States — Weather in May 2027

Monthly climate averages for Pendleton, United States. Based on 10-year ERA5 reanalysis data.

Csa Hot-Summer Mediterranean
8 /10
Excellent

May is an excellent month in Pendleton

Climate Overview

Pendleton, United States in May has warm conditions, with highs averaging 22.9°C (73°F). Temperatures drop noticeably between day and night.

This month falls at the end of Spring.

Daily highs in May gradually rise from around 22°C (72°F) at the start to 26°C (78°F) by month's end.

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

Expect around 11.5h of sunshine at the start of May, increasing to 12.8h by the end.

The warmest days tend to fall around the 31th, averaging 26°C (79°F).

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

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Monthly May Averages

Temperature
23°C / 10°C
Feels Like
21°C / 7°C
Rain
6 days · 39 mm
Sunshine
12.3h / day
Humidity
53% — Moderate
Wind
17 km/h
Wind Direction
SW (229°)
Gusts
38 km/h
Daylight
14.9 h
Cloud Cover
49%
Clear Sky Days
6.5
UV Index
6.5 — High
Dew Point
7°C — Dry
Moon Phase
Waxing Gibbous · 66%

Climate Charts

Daily averages based on historical data (2016–2025)

Daily Temperature

32°C 27°C 22°C 17°C 12°C 7°C 2°C 151015202531
HighLow

Daily Precipitation

0 mm 2 mm 4 mm 6 mm 151015202531
Rainfall

Daily Sunshine

0h 4h 8h 12h 16h 151015202531
Sunshine

Daily Wind Speed

0 5 10 15 20 25 151015202531
Wind Speed
Sun Position
Sunrise 05:25
Daylight 14.9h
Sunset 20:20

What to Expect

Daytime temperatures around 23°C (73°F) are ideal for full-day outdoor exploration.

Rain usually comes in shorter passing showers rather than all-day rain.

1 of the last 5 yearly records were warmer than this month's long-run average.

Compare Months

January
Poor
Temp
7°C / -1°C
Feels Like
4°C / -5°C
Rain
13days (61 mm) Wet
Sun
5.5h Fair
Humidity
77% Humid
UV
1.9 Low
Snow Days
7days
View Details
February
Poor
Temp
8°C / -1°C
Feels Like
5°C / -5°C
Rain
14days (64 mm) Wet
Sun
6.8h Fair
Humidity
73% Muggy
UV
2.7 Moderate
Snow Days
11days
View Details
March
Poor
Temp
13°C / 2°C
Feels Like
10°C / -2°C
Rain
12days (56 mm) Wet
Sun
8.9h Good
Humidity
68% Muggy
UV
4.1 Moderate
Snow Days
4days
View Details
April
Fair
Temp
17°C / 5°C
Feels Like
15°C / 2°C
Rain
9days (42 mm) Wet
Sun
10.8h Excellent
Humidity
59% Moderate
UV
5.7 High
Snow Days
2days
View Details
May best
Excellent
Temp
23°C / 10°C
Feels Like
21°C / 7°C
Rain
6days (39 mm) Good
Sun
12.3h Excellent
Humidity
53% Moderate
UV
6.5 High
View Details
June best
Excellent
Temp
28°C / 14°C
Feels Like
26°C / 12°C
Rain
3days (19 mm) Excellent
Sun
13.2h Excellent
Humidity
44% Moderate
UV
7.2 Very High
View Details
July best
Excellent
Temp
33°C / 18°C
Feels Like
32°C / 17°C
Rain
1days (2 mm) Excellent
Sun
13.8h Excellent
Humidity
32% Comfortable
UV
7.5 Very High
View Details
August best
Excellent
Temp
32°C / 18°C
Feels Like
31°C / 17°C
Rain
1days (6 mm) Excellent
Sun
12.4h Excellent
Humidity
37% Comfortable
UV
6.5 High
View Details
September best
Excellent
Temp
27°C / 13°C
Feels Like
25°C / 12°C
Rain
4days (16 mm) Good
Sun
10.8h Excellent
Humidity
48% Moderate
UV
5.3 High
View Details
October
Good
Temp
18°C / 7°C
Feels Like
16°C / 5°C
Rain
8days (46 mm) Wet
Sun
8.5h Good
Humidity
62% Muggy
UV
3.6 Moderate
View Details
November
Poor
Temp
11°C / 3°C
Feels Like
9°C / 0°C
Rain
11days (61 mm) Wet
Sun
6.3h Fair
Humidity
74% Muggy
UV
2 Low
Snow Days
3days
View Details
December
Poor
Temp
7°C / -1°C
Feels Like
3°C / -4°C
Rain
13days (66 mm) Wet
Sun
5h Fair
Humidity
78% Humid
UV
1.5 Low
Snow Days
9days
View Details
Month Temp Feels Like Rain Sun Humidity UV Status
January 7°C / -1°C 4°C / -5°C 13days (61 mm) Wet 5.5h Fair 77% Humid 1.9 Low Poor View Details
February 8°C / -1°C 5°C / -5°C 14days (64 mm) Wet 6.8h Fair 73% Muggy 2.7 Moderate Poor View Details
March 13°C / 2°C 10°C / -2°C 12days (56 mm) Wet 8.9h Good 68% Muggy 4.1 Moderate Poor View Details
April 17°C / 5°C 15°C / 2°C 9days (42 mm) Wet 10.8h Excellent 59% Moderate 5.7 High Fair View Details
May best 23°C / 10°C 21°C / 7°C 6days (39 mm) Good 12.3h Excellent 53% Moderate 6.5 High Excellent View Details
June best 28°C / 14°C 26°C / 12°C 3days (19 mm) Excellent 13.2h Excellent 44% Moderate 7.2 Very High Excellent View Details
July best 33°C / 18°C 32°C / 17°C 1days (2 mm) Excellent 13.8h Excellent 32% Comfortable 7.5 Very High Excellent View Details
August best 32°C / 18°C 31°C / 17°C 1days (6 mm) Excellent 12.4h Excellent 37% Comfortable 6.5 High Excellent View Details
September best 27°C / 13°C 25°C / 12°C 4days (16 mm) Good 10.8h Excellent 48% Moderate 5.3 High Excellent View Details
October 18°C / 7°C 16°C / 5°C 8days (46 mm) Wet 8.5h Good 62% Muggy 3.6 Moderate Good View Details
November 11°C / 3°C 9°C / 0°C 11days (61 mm) Wet 6.3h Fair 74% Muggy 2 Low Poor View Details
December 7°C / -1°C 3°C / -4°C 13days (66 mm) Wet 5h Fair 78% Humid 1.5 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 layerUmbrellaSunscreen (SPF 30+)SunglassesComfortable walking shoes

Frequently Asked Questions

May is typically excellent for visiting Pendleton, with average highs of 23°C (73°F) and around 6 rainy days. Pendleton, United States in May has warm conditions, with highs averaging 22.9°C (73°F). Temperatures drop noticeably be
Pendleton typically sees around 6 rainy days in May with 39 mm (1.5 in) of total rainfall. An umbrella should suffice.
Nights in Pendleton during May are cool at around 10°C (49°F). Bring a jacket or sweater for evenings.
With highs of 23°C (73°F) and lows of 10°C (49°F) in May, we recommend: Warm evening layer, Umbrella, Sunscreen (SPF 30+), Sunglasses, Comfortable walking shoes. Comfortable walking shoes are essential.
Yes, May offers some of the best weather conditions in Pendleton with comfortable temperatures and lower chances of rain.
The average UV index in Pendleton during May is 7 (high). Wear sunscreen SPF 30+, a hat, and sunglasses. Limit direct sun exposure between 10 AM and 4 PM.
Pendleton gets approximately 15 hours of daylight per day in May, with around 12 hours of sunshine.
Snow is uncommon in Pendleton during May based on 10-year climate averages.

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