July Weather in Yamhill Oregon, United States

Daily high temperatures increase by 5°F, from 77°F to 82°F, rarely falling below 67°F or exceeding 93°F.

Daily low temperatures increase by 2°F, from 52°F to 54°F, rarely falling below 46°F or exceeding 60°F. The highest daily average low temperature is 54°F on July 31.

For reference, on August 3, the hottest day of the year, temperatures in Yamhill typically range from 54°F to 82°F, while on December 23, the coldest day of the year, they range from 35°F to 45°F.

The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on July. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Gasteiz / Vitoria, Spain (5,338 miles away) is the far-away foreign place with temperatures most similar to Yamhill (view comparison).

© OpenStreetMap contributors

Compare Yamhill to another city:

CompareMap

The month of July in Yamhill experiences rapidly decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 31% to 18%.

The clearest day of the month is July 27, with clear, mostly clear, or partly cloudy conditions 82% of the time.

For reference, on January 16, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 76%, while on August 3, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 82%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Yamhill, the chance of a wet day over the course of July is rapidly decreasing, starting the month at 12% and ending it at 5%.

For reference, the year's highest daily chance of a wet day is 57% on November 27, and its lowest chance is 4% on August 3.

Rainfall

To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during July in Yamhill is gradually decreasing, starting the month at 0.8 inches, when it rarely exceeds 1.6 inches or falls below 0.1 inches, and ending the month at 0.3 inches, when it rarely exceeds 1.0 inches or falls below -0.0 inches.

The lowest average 31-day accumulation is 0.3 inches on July 29.

Over the course of July in Yamhill, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 51 minutes, implying an average daily decrease of 1 minute, 42 seconds, and weekly decrease of 11 minutes, 55 seconds.

The shortest day of the month is July 31, with 14 hours, 45 minutes of daylight and the longest day is July 1, with 15 hours, 36 minutes of daylight.

The earliest sunrise of the month in Yamhill is 5:28 AM on July 1 and the latest sunrise is 28 minutes later at 5:56 AM on July 31.

The latest sunset is 9:04 PM on July 1 and the earliest sunset is 23 minutes earlier at 8:41 PM on July 31.

Daylight saving time is observed in Yamhill during 2025, but it neither starts nor ends during July, so the entire month is in daylight saving time.

For reference, on June 21, the longest day of the year, the Sun rises at 5:24 AM and sets 15 hours, 40 minutes later, at 9:04 PM, while on December 21, the shortest day of the year, it rises at 7:49 AM and sets 8 hours, 43 minutes later, at 4:32 PM.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

The figure below presents a compact representation of key lunar data for July 2025. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

The chance that a given day will be muggy in Yamhill is essentially constant during July, remaining around 0% throughout.

For reference, on July 13, the muggiest day of the year, there are muggy conditions 0% of the time, while on January 1, the least muggy day of the year, there are muggy conditions 0% of the time.

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed in Yamhill is essentially constant during July, remaining around 4.7 miles per hour throughout.

For reference, on December 3, the windiest day of the year, the daily average wind speed is 6.1 miles per hour, while on August 20, the calmest day of the year, the daily average wind speed is 4.5 miles per hour.

The highest daily average wind speed during July is 4.7 miles per hour on July 20.

The hourly average wind direction in Yamhill throughout July is predominantly from the north, with a peak proportion of 54% on July 21.

Yamhill is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.

The average surface water temperature in Yamhill is essentially constant during July, remaining around 58°F throughout.

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

The growing season in Yamhill typically lasts for 6.8 months (206 days), from around April 9 to around November 2, rarely starting before March 8 or after May 7, and rarely ending before October 12 or after November 27.

The month of July in Yamhill is reliably fully within the growing season.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

The average accumulated growing degree days in Yamhill are rapidly increasing during July, increasing by 463°F, from 704°F to 1,167°F, over the course of the month.

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy in Yamhill is essentially constant during July, remaining within 0.1 kWh of 7.2 kWh throughout.

The highest average daily incident shortwave solar energy during July is 7.3 kWh on July 16.

For the purposes of this report, the geographical coordinates of Yamhill are 45.341 deg latitude, -123.187 deg longitude, and 194 ft elevation.

The topography within 2 miles of Yamhill contains only modest variations in elevation, with a maximum elevation change of 420 feet and an average elevation above sea level of 213 feet. Within 10 miles contains only modest variations in elevation (2,221 feet). Within 50 miles contains large variations in elevation (4,823 feet).

The area within 2 miles of Yamhill is covered by cropland (99%), within 10 miles by cropland (51%) and trees (35%), and within 50 miles by trees (39%) and cropland (25%).