This report describes the typical weather at the Klamath Falls International Airport (Klamath Falls, 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.
Klamath Falls, Oregon has a continental climate with dry warm summers. The area within 25 mi of this station is covered by forests (52%), grasslands (30%), shrublands (10%), and lakes and rivers (6%).
Over the course of a year, the temperature typically varies from 21°F to 85°F and is rarely below 8°F or above 94°F.
The warm season lasts from June 20 to September 13 with an average daily high temperature above 76°F. The hottest day of the year is July 30, with an average high of 85°F and low of 51°F.
The cold season lasts from November 14 to March 3 with an average daily high temperature below 47°F. The coldest day of the year is December 24, with an average low of 21°F and high of 38°F.
The length of the day varies significantly over the course of the year. The shortest day is December 21 with 9:06 hours of daylight; the longest day is June 20 with 15:16 hours of daylight.
The earliest sunrise is at 5:30am on June 12 and the latest sunset is at 8:47pm on June 28. The latest sunrise is at 7:43am on November 3 and the earliest sunset is at 4:34pm on December 7.
Daylight saving 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 21% (mostly clear) to 89% (mostly cloudy). The sky is cloudiest on December 29 and clearest on August 9. The clearer part of the year begins around May 26. The cloudier part of the year begins around October 23.
On August 9, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 80% of the time, and overcast or mostly cloudy 17% of the time.
On December 29, the cloudiest day of the year, the sky is overcast, mostly cloudy, or partly cloudy 75% of the time, and clear or mostly clear 23% of the time.
The probability that precipitation will be observed at this location varies throughout the year. Precipitation is most likely around March 9, occurring in 53% of days. Precipitation is least likely around August 1, occurring in 15% of days.
Over the entire year, the most common forms of precipitation are light rain, light snow, and moderate snow.
Light rain is the most severe precipitation observed during 40% of those days with precipitation. It is most likely around May 8, when it is observed during 20% of all days.
Light snow is the most severe precipitation observed during 31% of those days with precipitation. It is most likely around February 2, when it is observed during 24% of all days.
Moderate snow is the most severe precipitation observed during 12% of those days with precipitation. It is most likely around December 22, when it is observed during 10% of all days.
During the warm season, which lasts from June 20 to September 13, there is a 18% 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 thunderstorms (46% of days with precipitation have at worst thunderstorms), light rain (45%), and moderate rain (5%).
During the cold season, which lasts from November 14 to March 3, there is a 49% 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 snow (45% of days with precipitation have at worst light snow), light rain (28%), and moderate snow (19%).
The likelihood of snow falling is highest around January 25, occurring in 35% of days. The season in which it is relatively likely for snow to fall spans from October 28 to May 8.
Either snow rarely accumulates at this location or snow depth measurements are unavailable or unreliable.
The relative humidity typically ranges from 23% (dry) to 95% (very humid) over the course of the year, rarely dropping below 14% (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 26% (dry) three days out of four; it is most humid around January 1, exceeding 93% (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 17°F (dry) to 53°F (very comfortable) and is rarely below 5°F (dry) or above 59°F (comfortable).
The time of the year between July 3 and August 20 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 18 mph (calm to moderate breeze), rarely exceeding 27 mph (strong breeze).
The highest average wind speed of 8 mph (gentle breeze) occurs around April 1, at which time the average daily maximum wind speed is 18 mph (moderate breeze).
The lowest average wind speed of 5 mph (light breeze) occurs around October 14, at which time the average daily maximum wind speed is 12 mph (gentle breeze).