Mukilteo in Summer
In summer (June, July and August), Mukilteo sees average daytime highs around 68°F and overnight lows near 54°F, with 6.2 in of rain over about 23 wet days across the season. It is the warmest season of the year and the driest season of the year.
Over the season highs climb from about 62°F in early June to 68°F by late August. The sky is clear or mostly clear about 42% of the time across summer, and the air most often feels dry.
Summer is Mukilteo's best season of the year to visit on our travel score. For the whole year in context, see Mukilteo's year-round climate.
- Avg daytime high
- 68°F
- warmest season of the year
- Avg overnight low
- 54°F
- Rainfall
- 6.2 in
- 23 wet days
- Avg wind
- 5 mph
- Travel score
- 6.8
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in Mukilteo in Summer
Over the season highs climb from about 62°F in early June to 68°F by late August.
A typical summer day in Mukilteo reaches about 68°F and drops to 54°F overnight. The warmest of the three months is August, the coolest June.
How summer really feels in Mukilteo
Once humidity and wind are folded in, summer brings about 0 days that feel above 90°F and 0 that feel at or below 32°F.
summer sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Mukilteo weather by month
How the three summer months (June, July and August) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 45° / 38° | 9.1 | 19.3 | 5 | 8.6 | 0.7 |
| Feb | 47° / 38° | 5.8 | 15.4 | 4.2 | 9.9 | 1.2 |
| Mar | 50° / 40° | 7.0 | 19.1 | 3.1 | 11.6 | 1.8 |
| Apr | 54° / 43° | 5.2 | 16 | 0.8 | 13.4 | 2.8 |
| May | 60° / 47° | 3.5 | 12.3 | 0.1 | 14.9 | 4.5 |
| Jun | 64° / 51° | 3.1 | 10.6 | 0 | 15.7 | 5.6 |
| Jul | 69° / 55° | 1.5 | 6.1 | 0 | 15.4 | 7.3 |
| Aug | 70° / 55° | 1.7 | 6.1 | 0 | 14.1 | 7.4 |
| Sep | 65° / 52° | 3.3 | 9.4 | 0 | 12.4 | 6.1 |
| Oct | 56° / 46° | 7.1 | 15 | 0 | 10.6 | 3.5 |
| Nov | 48° / 41° | 10.0 | 19.3 | 1.9 | 9 | 1.4 |
| Dec | 44° / 38° | 9.1 | 19.1 | 5.3 | 8.2 | 0.5 |
Cloud cover in Summer
The sky is clear or mostly clear about 42% of the time across summer.
Chance of precipitation in Summer
Mukilteo gets around 6.2 in of rain over 23 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 5 mph across summer.
Sunrise & sunset in Summer
Daylight runs from about 15 h 30 min in early June to 13 h 18 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 5.6 kWh/m².
Hazard calendar for Mukilteo
None of Mukilteo's seasonal hazards peak in summer. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do.
Mukilteo's rainy season runs October–April, when most of the year's rain falls.
Is summer a good time to visit Mukilteo?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is a reasonable time to visit Mukilteo for sightseeing.
What to pack for Mukilteo in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Mukilteo sees daytime highs around 68°F and nights near 54°F. Pack sun protection. Worth having: rain gear. About 23 days see rain.
Sea temperature near Mukilteo in Summer
The nearest coast averages about 53°F across summer — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 29 mi away) is warmest in August at about 53°F and coldest in February near 46°F.
The water stays below 68°F all year — cool enough that most swimmers want a wetsuit.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°F) | 46 | 46 | 47 | 48 | 50 | 52 | 53 | 53 | 53 | 50 | 49 | 47 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing |
| Sea temperature (°F) | Comfort | |
|---|---|---|
| Jan | 46 | Bracing |
| Feb | 46 | Bracing |
| Mar | 47 | Bracing |
| Apr | 48 | Bracing |
| May | 50 | Bracing |
| Jun | 52 | Bracing |
| Jul | 53 | Bracing |
| Aug | 53 | Bracing |
| Sep | 53 | Bracing |
| Oct | 50 | Bracing |
| Nov | 49 | Bracing |
| Dec | 47 | Bracing |
UV index in Mukilteo in Summer
Clear-sky midday UV across summer averages around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Mukilteo peaks around July 17 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 18 at about 1 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 1 | 1 | 4 | 5 | 7 | 6 | 8 | 6 | 4 | 3 | 1 | 1 |
| Level | Low | Low | Moderate | Moderate | High | High | Very high | High | Moderate | Moderate | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 1 | Low |
| Mar | 4 | Moderate |
| Apr | 5 | Moderate |
| May | 7 | High |
| Jun | 6 | High |
| Jul | 8 | Very high |
| Aug | 6 | High |
| Sep | 4 | Moderate |
| Oct | 3 | Moderate |
| Nov | 1 | Low |
| Dec | 1 | Low |
Air quality in Mukilteo in Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer falls, not just the annual average.
Air quality in Mukilteo is worst in August — around 20 µg/m³ PM2.5 (moderate), about 3.1× the cleanest month (December, 6 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 8 | 10 | 12 | 12 | 13 | 11 | 10 | 20 | 18 | 11 | 7 | 6 |
| Level | Good | Good | Moderate | Good | Moderate | Good | Good | Moderate | Moderate | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 8 | Good |
| Feb | 10 | Good |
| Mar | 12 | Moderate |
| Apr | 12 | Good |
| May | 13 | Moderate |
| Jun | 11 | Good |
| Jul | 10 | Good |
| Aug | 20 | Moderate |
| Sep | 18 | Moderate |
| Oct | 11 | Good |
| Nov | 7 | Good |
| Dec | 6 | Good |
Where is Mukilteo?
Mukilteo sits at 47.9°N, 122.3°W, 105 ft above sea level, in United States. The nearest listed city is Everett, 5.6 mi away.
Topography around Mukilteo
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Mukilteo.
Within 2 miles, the terrain around Mukilteo has only modest variations in elevation — a maximum elevation change of 630 ft around an average of 157 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 682 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 7,589 ft.
The land around Mukilteo is covered by water (60%) and trees (24%) within 2 miles, water (41%) and trees (37%) within 10 miles, and trees (67%) and water (21%) within 50 miles.
United States travel facts
- Power plugs
- Type A / B
- 120 V · 60 Hz
- Prices
- ≈ 100% of US
- price level, 2025
- GDP per capita
- $90,027
- 2025
- Happiness
- 6.8 / 10
- World Happiness, 2025
- Safe drinking water
- 98%
- of population, 2024
- Homicide rate
- 5.8
- per 100k, 2023
- Road deaths
- 12.7
- per 100k/yr, 2019
- Income group
- High
- World Bank
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Mukilteo (47.9445°, -122.3046°, elevation 105 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.