Seattle, WA weather in July
Expect mild, mostly dry weather in Seattle in July, with highs near 77°F and lows near 57°F. Rain falls on about 5 days. It is one of the warmest months in Seattle. Great for outdoor plans.
- Normal high
- 77°F
- Normal low
- 57°F
- Wet days
- 5
- 0.8 in total
- Muggy days
- 0
- dew point 65°F+
How July changes from start to finish
| July 1 | July 31 | |
|---|---|---|
| Normal high | 74°F | 78°F |
| Normal low | 55°F | 58°F |
| Chance of a wet day | 24% | 15% |
| Sunrise / sunset | 5:15 am / 9:10 pm | 5:45 am / 8:45 pm |
| Daylight | 15.9 h | 15.0 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Pacific Time).
A typical July day
- 6 am60°Fdew point 53°F
- 9 am65°Fdew point 53°F
- Noon71°Fdew point 53°F
- 3 pm75°Fdew point 52°F
- 6 pm74°Fdew point 52°F
- 9 pm68°Fdew point 53°F
NOAA hourly normals (local standard time) from Seattle Boeing Fld (5 mi away); average wind 5 mph.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F22 of 31
- Beach dayshigh 80-95°F, under 0.05 in of rain, afternoon wind under 15 mph9 of 31
- Hot dayshigh 90°F or more1 of 31
- Muggy daysdaily mean dew point 65°F or more0 of 31
- Wet daysat least 0.01 in of rain or melted snow5 of 31
- Notable rainat least 0.10 in2 of 31
- Freezing nightslow 32°F or below0 of 31
- Snow on the groundsnow depth 1 in or more0 of 31
Average days per July, counted from daily records for each year 1991-2020.
Rain in July
Normal precipitation is 0.8 in; a dry July brings about 0.2 in and a wet one about 1.3 in (25th and 75th percentiles). Days with half an inch or more are rare.
How July varies from year to year
- Warmest July, 1991-20202015: average high 82°F
- Coolest July1993: average high 70°F
- Wettest July1993: 2.1 in
- Driest July2003: no measurable precipitation
- Highest reading105°F (July 29, 2009)
- Lowest reading47°F (July 31, 2008)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
July compared with June and August
| June | July | August | |
|---|---|---|---|
| Normal high | 70°F | 77°F | 77°F |
| Normal low | 53°F | 57°F | 57°F |
| Wet days | 11 | 5 | 6 |
| Comfortable days | 22 | 22 | 22 |
| Daylight | 15.9 h | 15.5 h | 14.2 h |
Highs change by +7°F from June and 0°F into August.
Nearby alternatives in July
- Warmer: Leavenworth, WA78 mi · high 87°F · 3 wet days
- Drier: Salem, OR187 mi · high 84°F · 2 wet days
- Cooler: Port Angeles, WA62 mi · high 68°F · 4 wet days
How Seattle ranks in July
- Normal high349th warmest of 378 cities; 6th of 9 in Washington
- Wet days121st driest of 378
- Comfortable days13th most of 340
What to pack for Seattle in July
- Sunglasses and sunscreen – about 15.5 hours of daylight and highs near 77°F
Heating and cooling
July has 31 heating degree days and 78 cooling degree days (base 65°F), 2% of the year's total heating and cooling demand.
Questions
How hot is Seattle in July?
The normal high is 77°F and the normal low is 57°F. From 1991 to 2020 the hottest July reading was 105°F (July 29, 2009).
Does it rain a lot in Seattle in July?
About 5 days in July have at least 0.01 in of precipitation, and the normal total is 0.8 in. The wettest July in 1991-2020 was in 1993 (2.1 in); the driest was in 2003, with no measurable precipitation.
Is July a good time to visit Seattle?
July ranks 1st of 12 months on our comfort score for Seattle (86 out of 100). It has about 22 comfortable days and about 1 day at 90°F or hotter. The best months are June, July and August.
Where the numbers come from
- Temperature, rain, snowfall, snow depth and frost dates: Seattle Sand Pt WSFO (USW00094290), 6.6 mi NNE of the city center, 60 ft (113 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour: Seattle Boeing Fld (USW00024234), 5.4 mi SSE of the city center, 20 ft (153 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Seattle-Tacoma International Airport (727930-24233), 11 mi S of the city center, 369 ft (196 ft higher than the city). Hourly observations, 1991-2020.
- Not available for this location: cloud cover (no station close enough or similar enough in elevation).