Average Weather in Myrtle Creek Oregon, United States
In Myrtle Creek, the summers are short, warm, dry, and mostly clear and the winters are very cold, wet, and mostly cloudy. Over the course of the year, the temperature typically varies from 35°F to 87°F and is rarely below 27°F or above 97°F.
Based on the tourism score, the best time of year to visit Myrtle Creek for warm-weather activities is from early July to late August.
The hot season lasts for 2.9 months, from June 24 to September 19, with an average daily high temperature above 79°F. The hottest day of the year is August 3, with an average high of 87°F and low of 58°F.
The cool season lasts for 3.4 months, from November 12 to February 24, with an average daily high temperature below 55°F. The coldest day of the year is December 29, with an average low of 35°F and high of 47°F.
Average High and Low Temperature
The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.
Average Hourly Temperature
In Myrtle Creek, the average percentage of the sky covered by clouds experiences extreme seasonal variation over the course of the year.
The clearer part of the year in Myrtle Creek begins around June 15 and lasts for 3.9 months, ending around October 11. On August 3, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 85% of the time, and overcast or mostly cloudy 15% of the time.
The cloudier part of the year begins around October 11 and lasts for 8.1 months, ending around June 15. On November 30, the cloudiest day of the year, the sky is overcast or mostly cloudy 75% of the time, and clear, mostly clear, or partly cloudy 25% of the time.
Cloud Cover Categories
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Myrtle Creek varies very significantly throughout the year.
The wetter season lasts 6.5 months, from October 20 to May 2, with a greater than 28% chance of a given day being a wet day. The chance of a wet day peaks at 54% on November 30.
The drier season lasts 5.5 months, from May 2 to October 20. The smallest chance of a wet day is 3% on August 6.
Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 52% on November 30.
Daily Chance of Precipitation
To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Myrtle Creek experiences extreme seasonal variation in monthly rainfall.
The rainy period of the year lasts for 10 months, from August 29 to July 1, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around December 5, with an average total accumulation of 7.9 inches.
The rainless period of the year lasts for 1.9 months, from July 1 to August 29. The least rain falls around July 31, with an average total accumulation of 0.2 inches.
Average Monthly Rainfall
The length of the day in Myrtle Creek varies significantly over the course of the year. In 2018, the shortest day is December 21, with 9 hours, 0 minutes of daylight; the longest day is June 21, with 15 hours, 22 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:33 AM on June 15, and the latest sunrise is 2 hours, 17 minutes later at 7:50 AM on November 3. The earliest sunset is at 4:38 PM on December 9, and the latest sunset is 4 hours, 18 minutes later at 8:56 PM on June 26.
Daylight saving time (DST) is observed in Myrtle Creek during 2018, starting in the spring on March 11, lasting 7.8 months, and ending in the fall on November 4.
Sunrise & Sunset with Twilight and Daylight Saving Time
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 perceived humidity level in Myrtle Creek, as measured by the percentage of time in which the humidity comfort level is muggy, oppressive, or miserable, does not vary significantly over the course of the year, remaining a virtually constant 0% throughout.
Humidity Comfort Levels
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 Myrtle Creek does not vary significantly over the course of the year, remaining within 0.4 miles per hour of 4.1 miles per hour throughout.
Average Wind Speed
The predominant average hourly wind direction in Myrtle Creek varies throughout the year.
The wind is most often from the north for 6.3 months, from April 10 to October 18, with a peak percentage of 75% on July 22. The wind is most often from the south for 5.7 months, from October 18 to April 10, with a peak percentage of 42% on January 1.
Myrtle Creek 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 water temperature experiences some seasonal variation over the course of the year.
The time of year with warmer water lasts for 3.3 months, from June 19 to September 28, with an average temperature above 55°F. The day of the year with the warmest water is August 26, with an average temperature of 57°F.
The time of year with cooler water lasts for 4.1 months, from December 15 to April 19, with an average temperature below 52°F. The day of the year with the coolest water is February 10, with an average temperature of 50°F.
Average Water Temperature
Best Time of Year to Visit
To characterize how pleasant the weather is in Myrtle Creek throughout the year, we compute two travel scores.
The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best time of year to visit Myrtle Creek for general outdoor tourist activities is from early July to late August, with a peak score in the last week of July.
The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit Myrtle Creek for hot-weather activities is from mid July to mid August, with a peak score in the first week of August.
For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.
Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.
Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.
Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.
Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.
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 Myrtle Creek typically lasts for 7.9 months (241 days), from around March 23 to around November 19, rarely starting before February 12 or after April 21, and rarely ending before October 23 or after December 15.
Time Spent in Various Temperature Bands and 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.
Based on growing degree days alone, the first spring blooms in Myrtle Creek should appear around March 29, only rarely appearing before March 10 or after April 18.
Growing Degree Days
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 experiences extreme seasonal variation over the course of the year.
The brighter period of the year lasts for 2.9 months, from May 30 to August 25, with an average daily incident shortwave energy per square meter above 6.5 kWh. The brightest day of the year is July 16, with an average of 7.8 kWh.
The darker period of the year lasts for 3.8 months, from October 28 to February 22, with an average daily incident shortwave energy per square meter below 2.6 kWh. The darkest day of the year is December 26, with an average of 1.3 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Myrtle Creek are 43.020 deg latitude, -123.293 deg longitude, and 1,043 ft elevation.
The topography within 2 miles of Myrtle Creek contains very significant variations in elevation, with a maximum elevation change of 1,729 feet and an average elevation above sea level of 977 feet. Within 10 miles contains very significant variations in elevation (3,077 feet). Within 50 miles contains large variations in elevation (6,749 feet).
The area within 2 miles of Myrtle Creek is covered by cropland (43%), shrubs (31%), and trees (13%), within 10 miles by shrubs (45%) and trees (30%), and within 50 miles by trees (62%) and shrubs (30%).
This report illustrates the typical weather in Myrtle Creek, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.
Temperature and Dew Point
There are 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Myrtle Creek.
For each station, the records are corrected for the elevation difference between that station and Myrtle Creek according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.
The estimated value at Myrtle Creek is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Myrtle Creek and a given station.
All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , by Jean Meeus.
All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.
Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.
Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.
Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .
Time zones for aiports and weather stations are provided by AskGeo.com .
Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.