Seattle weather in July: Seattle, Washington: normal highs, lows, rain and records for July
Seattle in July has a normal high of 77°F and a normal low of 57°F, a daily mean of 67°F, rising from 74°F on the 1st to 79°F by the 31st. Measurable precipitation falls on 5 days in a normal July, 0.60 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 25°C and low of 14°C, 15 mm of precipitation in July.
- NOAA stationSeattle Tacoma International Airport
- Station IDUSW00024233
- Location47.44°N 122.31°W
- Elevation370 ft (113 m)
- From the center12 miles
- Population780,995
- Jan 48° 38°
- Feb 50° 38°
- Mar 54° 40°
- Apr 59° 43°
- May 66° 49°
- Jun 71° 53°
- Jul 77° 57°
- Aug 78° 57°
- Sep 72° 54°
- Oct 61° 47°
- Nov 52° 41°
- Dec 47° 37°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Seattle in July?
The normal high is 77°F and the normal low 57°F, for a daily mean of 67.1°F. July is 5.1°F warmer than June and 0.3°F cooler than August. July is the 2nd warmest month of the year in Seattle and the 12th wettest. Across the month the normal high rises 5°F, from 74°F on July 1 to 79°F on July 31. From one year to the next July's mean temperature typically moves about 2.1°F either way (NOAA's standard deviation), so roughly two Julys in three average between 65°F and 69°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 23%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| July 1 | 74°F | 55°F | 23% | 10% |
| July 8 | 76°F | 56°F | 19% | 8% |
| July 15 | 78°F | 57°F | 16% | 7% |
| July 22 | 79°F | 58°F | 15% | 6% |
| July 31 | 79°F | 58°F | 14% | 6% |
Every day of July: normal high, low and chance of precipitation (warmest afternoon July 28, coldest night July 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| July 1 | 74°F | 55°F | 23% | 10% | 15 h 50 min |
| July 2 | 75°F | 55°F | 22% | 10% | 15 h 50 min |
| July 3 | 75°F | 55°F | 22% | 9% | 15 h 50 min |
| July 4 | 75°F | 56°F | 21% | 9% | 15 h 50 min |
| July 5 | 75°F | 56°F | 20% | 9% | 15 h 50 min |
| July 6 | 76°F | 56°F | 20% | 8% | 15 h 50 min |
| July 7 | 76°F | 56°F | 19% | 8% | 15 h 50 min |
| July 8 | 76°F | 56°F | 19% | 8% | 15 h 50 min |
| July 9 | 76°F | 56°F | 19% | 8% | 15 h 50 min |
| July 10 | 77°F | 56°F | 18% | 8% | 15 h 40 min |
| July 11 | 77°F | 56°F | 18% | 7% | 15 h 40 min |
| July 12 | 77°F | 57°F | 17% | 7% | 15 h 40 min |
| July 13 | 77°F | 57°F | 17% | 7% | 15 h 40 min |
| July 14 | 78°F | 57°F | 17% | 7% | 15 h 40 min |
| July 15 | 78°F | 57°F | 16% | 7% | 15 h 40 min |
| July 16 | 78°F | 57°F | 16% | 7% | 15 h 40 min |
| July 17 | 78°F | 57°F | 16% | 7% | 15 h 30 min |
| July 18 | 78°F | 57°F | 16% | 6% | 15 h 30 min |
| July 19 | 78°F | 57°F | 15% | 6% | 15 h 30 min |
| July 20 | 78°F | 57°F | 15% | 6% | 15 h 30 min |
| July 21 | 79°F | 58°F | 15% | 6% | 15 h 30 min |
| July 22 | 79°F | 58°F | 15% | 6% | 15 h 20 min |
| July 23 | 79°F | 58°F | 15% | 6% | 15 h 20 min |
| July 24 | 79°F | 58°F | 14% | 6% | 15 h 20 min |
| July 25 | 79°F | 58°F | 14% | 6% | 15 h 20 min |
| July 26 | 79°F | 58°F | 14% | 6% | 15 h 10 min |
| July 27 | 79°F | 58°F | 14% | 6% | 15 h 10 min |
| July 28 | 79°F | 58°F | 14% | 6% | 15 h 10 min |
| July 29 | 79°F | 58°F | 14% | 6% | 15 h 10 min |
| July 30 | 79°F | 58°F | 14% | 6% | 15 h |
| July 31 | 79°F | 58°F | 14% | 6% | 15 h |
- Normal high
- 77°FJuly average
- Normal low
- 57°FJuly average
- Precipitation
- 0.60 inmonth total
- Days with precipitation
- 50.01 inch or more
- Days at 90°F or more
- 2
- Daylight
- 15 h 50 min to 15 hJuly 1 to July 31
- Days at 70°F or more
- 25
- Days at 80°F or more
- 10
- Sunshine
- 78%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00024233; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Seattle in July?
On a given July day the chance of 0.01 inch or more is 17% on average, highest around July 1 (23%). In all, 0.60 in falls on 5 days of a normal July.
In a normal July in Seattle, 2 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00024233.
How humid and windy is Seattle in July?
At 3 p.m. the normal temperature is 76°F with 45% relative humidity and a dew point of 54°F; at 6 a.m. it is 59°F with 83% humidity. The wind averages 6.8 mph, most often from the west-northwest in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 59°F | 54°F | 83% | 5.3 mph | 41% |
| 9 a.m. | 65°F | 54°F | 69% | 6.4 mph | 44% |
| noon | 71°F | 54°F | 55% | 8.0 mph | 50% |
| 3 p.m. | 76°F | 54°F | 45% | 8.3 mph | 52% |
| 6 p.m. | 75°F | 54°F | 47% | 7.9 mph | 52% |
| 9 p.m. | 67°F | 54°F | 63% | 6.7 mph | 59% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00024233. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for July in Seattle?
The warmest July temperature on this station's record (since 1945) is 103°F, on July 29, 2009; the coldest is 43°F, on July 4, 1949. The wettest July brought 2.39 in (1983).
The July mean against the 1991-2020 normal of 67.1°F: 2021 68.0°F (+0.9), 2022 68.8°F (+1.7), 2023 68.5°F (+1.4), 2024 69.8°F (+2.7), 2025 67.9°F (+0.8), 2026 66.9°F (−0.2). 5 of 6 ran warmer than normal.
| July | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 68.0°F | +0.9°F | 0.00 in |
| 2022 | 68.8°F | +1.7°F | 0.18 in |
| 2023 | 68.5°F | +1.4°F | 0.09 in |
| 2024 | 69.8°F | +2.7°F | 0.16 in |
| 2025 | 67.9°F | +0.8°F | 0.01 in |
| 2026 | 66.9°F | −0.2°F | 0.42 in |
Source: records: ACIS, station USW00024233; recent months: ACIS, station USW00024233. Records and recent months use complete months only.
How does July in Seattle compare across Washington?
Across the 96 places PlainClimate covers in Washington, July normal highs run from 65°F in Long Beach to 93°F in Pasco; Seattle's is 77°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.