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May is a good month in Bothell

Climate Overview

Bothell, United States in May has mild conditions, with highs averaging 18.2°C (65°F) and noticeably cooler mornings. Rain falls on about 12 days this month.

This month falls at the end of Spring.

Temperatures remain fairly steady throughout May, with daily highs around 18°C (64°F).

May sees fairly even rainfall, totalling about 79 mm across the month.

Expect around 10.4h of sunshine at the start of May, increasing to 11.1h by the end.

The warmest days tend to fall around the 12th, averaging 19.6°C (67°F).

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

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Monthly May Averages

Temperature
18°C / 9°C
Feels Like
17°C / 7°C
Rain
12 days · 79 mm
Sunshine
11h / day
Humidity
76% — Humid
Wind
14 km/h
Wind Direction
SW (232°)
Gusts
28 km/h
Daylight
15.2 h
Cloud Cover
64%
Clear Sky Days
3.3
UV Index
5.5 — High
Dew Point
10°C — Dry
Moon Phase
Waxing Gibbous · 66%

Climate Charts

Daily averages based on historical data (2016–2025)

Daily Temperature

24°C 20°C 16°C 12°C 8°C 4°C 0°C 151015202531
HighLow

Daily Precipitation

0 mm 2 mm 4 mm 6 mm 8 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 05:32
Daylight 15.1h
Sunset 20:41

What to Expect

Keep afternoons flexible as tropical showers are common — they typically clear within an hour.

Wet weather can spread across much of the day, so it is best to keep outdoor plans flexible.

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

Compare Months

January
Wet
Temp
8°C / 3°C
Feels Like
5°C / -1°C
Rain
18days (184 mm) Wet
Sun
4.3h Fair
Humidity
84% Humid
UV
1.2 Low
Snow Days
3days
February
Poor
Temp
8°C / 2°C
Feels Like
5°C / -1°C
Rain
17days (147 mm) Wet
Sun
5.4h Fair
Humidity
83% Humid
UV
2 Low
Snow Days
6days
March
Poor
Temp
11°C / 4°C
Feels Like
8°C / 0°C
Rain
17days (129 mm) Wet
Sun
7.6h Good
Humidity
81% Humid
UV
3.4 Moderate
Snow Days
2days
April
Fair
Temp
14°C / 6°C
Feels Like
12°C / 3°C
Rain
16days (107 mm) Wet
Sun
9.4h Good
Humidity
77% Humid
UV
4.7 Moderate
Snow Days
1days
May
Good
Temp
18°C / 9°C
Feels Like
17°C / 7°C
Rain
12days (79 mm) Wet
Sun
11h Excellent
Humidity
76% Humid
UV
5.5 High
June best
Excellent
Temp
21°C / 12°C
Feels Like
21°C / 11°C
Rain
10days (70 mm) Wet
Sun
11.7h Excellent
Humidity
74% Muggy
UV
6.3 High
July best
Excellent
Temp
25°C / 14°C
Feels Like
25°C / 15°C
Rain
5days (21 mm) Good
Sun
12.7h Excellent
Humidity
70% Muggy
UV
6.9 High
August best
Excellent
Temp
25°C / 15°C
Feels Like
26°C / 15°C
Rain
5days (31 mm) Good
Sun
11.5h Excellent
Humidity
71% Muggy
UV
5.8 High
September best
Excellent
Temp
21°C / 13°C
Feels Like
21°C / 12°C
Rain
9days (73 mm) Wet
Sun
9.6h Good
Humidity
77% Humid
UV
4.6 Moderate
October
Fair
Temp
15°C / 9°C
Feels Like
14°C / 6°C
Rain
16days (151 mm) Wet
Sun
7h Good
Humidity
83% Humid
UV
2.9 Moderate
November
Wet
Temp
10°C / 6°C
Feels Like
8°C / 3°C
Rain
19days (189 mm) Wet
Sun
4.6h Fair
Humidity
85% Humid
UV
1.6 Low
Snow Days
1days
December
Wet
Temp
7°C / 3°C
Feels Like
4°C / 0°C
Rain
19days (205 mm) Wet
Sun
3.5h Poor
Humidity
85% Humid
UV
1 Low
Snow Days
3days
Month Temp Feels Like Rain Sun Humidity UV Status Details
January 8°C / 3°C 5°C / -1°C 18days (184 mm) Wet 4.3h Fair 84% Humid 1.2 Low Wet View Details
February 8°C / 2°C 5°C / -1°C 17days (147 mm) Wet 5.4h Fair 83% Humid 2 Low Poor View Details
March 11°C / 4°C 8°C / 0°C 17days (129 mm) Wet 7.6h Good 81% Humid 3.4 Moderate Poor View Details
April 14°C / 6°C 12°C / 3°C 16days (107 mm) Wet 9.4h Good 77% Humid 4.7 Moderate Fair View Details
May 18°C / 9°C 17°C / 7°C 12days (79 mm) Wet 11h Excellent 76% Humid 5.5 High Good View Details
June best 21°C / 12°C 21°C / 11°C 10days (70 mm) Wet 11.7h Excellent 74% Muggy 6.3 High Excellent View Details
July best 25°C / 14°C 25°C / 15°C 5days (21 mm) Good 12.7h Excellent 70% Muggy 6.9 High Excellent View Details
August best 25°C / 15°C 26°C / 15°C 5days (31 mm) Good 11.5h Excellent 71% Muggy 5.8 High Excellent View Details
September best 21°C / 13°C 21°C / 12°C 9days (73 mm) Wet 9.6h Good 77% Humid 4.6 Moderate Excellent View Details
October 15°C / 9°C 14°C / 6°C 16days (151 mm) Wet 7h Good 83% Humid 2.9 Moderate Fair View Details
November 10°C / 6°C 8°C / 3°C 19days (189 mm) Wet 4.6h Fair 85% Humid 1.6 Low Wet View Details
December 7°C / 3°C 4°C / 0°C 19days (205 mm) Wet 3.5h Poor 85% Humid 1 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.

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

Packing List

Warm evening layerUmbrellaWaterproof jacketComfortable walking shoes

Frequently Asked Questions

May is typically good for visiting Bothell, with average highs of 18°C (65°F) and around 12 rainy days. Bothell, United States in May has mild conditions, with highs averaging 18.2°C (65°F) and noticeably cooler mornings. Ra
Bothell typically sees around 12 rainy days in May with 79 mm (3.1 in) of total rainfall. Pack a waterproof jacket.
Nights in Bothell during May are cool at around 9°C (48°F). Bring a jacket or sweater for evenings.
With highs of 18°C (65°F) and lows of 9°C (48°F) in May, we recommend: Warm evening layer, Umbrella, Waterproof jacket, Comfortable walking shoes. Comfortable walking shoes are essential.
May is not the most favourable month weather-wise in Bothell. Consider visiting during months with milder temperatures or less rainfall for a better experience.
The average UV index in Bothell during May is 6 (high). Wear sunscreen SPF 30+, a hat, and sunglasses. Limit direct sun exposure between 10 AM and 4 PM.
Bothell gets approximately 15 hours of daylight per day in May, with around 11 hours of sunshine.
Snow is uncommon in Bothell during May based on 10-year climate averages.

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