This report describes the typical weather at the Rogue Valley International-Medford Airport (Medford, Oregon, United States) weather station over the course of an average year. It is based on the historical records from 1974 to 2012. Earlier records are either unavailable or unreliable.
Medford, Oregon has a mediterranean climate with dry hot summers and mild winters. The area within 25 mi of this station is covered by forests (86%) and croplands (13%).
Over the course of a year, the temperature typically varies from 31Â°F to 92Â°F and is rarely below 23Â°F or above 101Â°F.
The warm season lasts from June 21 to September 17 with an average daily high temperature above 83Â°F. The hottest day of the year is July 30, with an average high of 92Â°F and low of 59Â°F.
The cold season lasts from November 11 to February 17 with an average daily high temperature below 54Â°F. The coldest day of the year is December 25, with an average low of 31Â°F and high of 44Â°F.
The length of the day varies significantly over the course of the year. The shortest day is December 21 with 9:04 hours of daylight; the longest day is June 20 with 15:17 hours of daylight.
The earliest sunrise is at 5:33am on June 14 and the latest sunset is at 8:53pm on June 26. The latest sunrise is at 7:48am on November 3 and the earliest sunset is at 4:38pm on December 9.
Daylight savings time (DST) is observed in this location during 2012, starting in the spring on March 11 and ending in the fall on November 4.
The median cloud cover ranges from 1% (clear) to 96% (overcast). The sky is cloudiest on December 19 and clearest on August 4. The clearer part of the year begins around May 21. The cloudier part of the year begins around October 24.
On August 4, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 86% of the time, and overcast or mostly cloudy 14% of the time.
On December 19, the cloudiest day of the year, the sky is overcast, mostly cloudy, or partly cloudy 79% of the time, and clear or mostly clear 21% of the time.
The probability that precipitation will be observed at this location varies throughout the year. Precipitation is most likely around December 16, occurring in 64% of days. Precipitation is least likely around August 2, occurring in 11% of days.
Over the entire year, the most common forms of precipitation are light rain, moderate rain, and light snow.
Light rain is the most severe precipitation observed during 50% of those days with precipitation. It is most likely around March 19, when it is observed during 30% of all days.
Moderate rain is the most severe precipitation observed during 28% of those days with precipitation. It is most likely around December 5, when it is observed during 18% of all days.
Light snow is the most severe precipitation observed during 10% of those days with precipitation. It is most likely around December 27, when it is observed during 13% of all days.
During the warm season, which lasts from June 21 to September 17, there is a 14% average chance that precipitation will be observed at some point during a given day. When precipitation does occur it is most often in the form of light rain (43% of days with precipitation have at worst light rain), thunderstorms (33%), and moderate rain (21%).
During the cold season, which lasts from November 11 to February 17, there is a 59% average chance that precipitation will be observed at some point during a given day. When precipitation does occur it is most often in the form of light rain (43% of days with precipitation have at worst light rain), moderate rain (28%), and light snow (18%).
The likelihood of snow falling is highest around January 4, occurring in 16% of days. The season in which it is relatively likely for snow to fall spans from November 13 to March 23.
Either snow rarely accumulates at this location or snow depth measurements are unavailable or unreliable.
The relative humidity typically ranges from 22% (dry) to 97% (very humid) over the course of the year, rarely dropping below 13% (very dry) and reaching as high as 100% (very humid).
The air is driest around August 2, at which time the relative humidity drops below 25% (dry) three days out of four; it is most humid around December 6, exceeding 96% (very humid) three days out of four.
Dew point is often a better measure of how comfortable a person will find the weather than relative humidity because it more directly relates to whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid.
Over the course of a year, the dew point typically varies from 28Â°F (dry) to 55Â°F (very comfortable) and is rarely below 19Â°F (dry) or above 60Â°F (comfortable).
The time of the year between June 8 and September 13 is the most comfortable, with dew points that are neither too dry nor too muggy.
Over the course of the year typical wind speeds vary from 0 mph to 14 mph (calm to moderate breeze), rarely exceeding 21 mph (fresh breeze).
The highest average wind speed of 6 mph (light breeze) occurs around June 24, at which time the average daily maximum wind speed is 14 mph (moderate breeze).
The lowest average wind speed of 3 mph (light air) occurs around October 25, at which time the average daily maximum wind speed is 7 mph (light breeze).