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Average Weather in March in Three Rivers Oregon, United States

In Three Rivers, the month of March is characterized by rising daily high temperatures, with daily highs increasing by 5°F, from 46°F to 51°F over the course of the month, and rarely exceeding 64°F or dropping below 36°F.

Daily low temperatures are around 28°F, rarely falling below 18°F or exceeding 38°F.

For reference, on August 4, the hottest day of the year, temperatures in Three Rivers typically range from 50°F to 81°F, while on December 23, the coldest day of the year, they range from 23°F to 37°F.

Average High and Low Temperature in March

The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on March. 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.

Average Hourly Temperature in March

Average Hourly Temperature in March in Three Rivers12 AM4 AM8 AM12 PM4 PM8 PM12 AM181522291122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930303131FebAprfreezingchillycoldcool
The average hourly temperature, color coded into bands: frigid < 15°F < freezing < 32°F < chilly < 45°F < cold < 55°F < cool < 65°F < comfortable < 75°F < warm < 85°F < hot < 95°F < sweltering. The shaded overlays indicate night and civil twilight.

Clouds

The month of March in Three Rivers experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 63% throughout the month. The highest chance of overcast or mostly cloudy conditions is 65% on March 8.

The clearest day of the month is March 31, with clear, mostly clear, or partly cloudy conditions 38% of the time.

For reference, on January 16, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 66%, while on July 28, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 83%.

Cloud Cover in March

The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds: clear < 20% < mostly clear < 40% < partly cloudy < 60% < mostly cloudy < 80% < overcast.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Three Rivers, the chance of a wet day over the course of March is gradually decreasing, starting the month at 35% and ending it at 33%.

For reference, the year's highest daily chance of a wet day is 45% on November 27, and its lowest chance is 5% on August 5.

Over the course of March in Three Rivers, the chance of a day with only rain remains an essentially constant 25% throughout, the chance of a day with mixed snow and rain remains an essentially constant 7% throughout, and the chance of a day with only snow decreases from 3% to 1%.

Probability of Precipitation in March

The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).

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 March in Three Rivers is gradually decreasing, starting the month at 2.0 inches, when it rarely exceeds 4.3 inches or falls below 0.6 inches, and ending the month at 1.7 inches, when it rarely exceeds 3.4 inches or falls below 0.7 inches.

Average Monthly Rainfall in March

The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average liquid-equivalent snowfall.

Snowfall

We report snowfall in liquid-equivalent terms. The actual depth of new snowfall is typically between 5 and 10 times the liquid-equivalent amount, assuming the ground is frozen. As with rainfall, we consider the liquid-equivalent snowfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day liquid-equivalent snowfall during March in Three Rivers is essentially constant, remaining about 0.3 inches throughout, and rarely exceeding 1.0 inches or falling to 0.0 inches.

Average Monthly Liquid-Equivalent Snowfall in March

The average liquid-equivalent snowfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average rainfall.

Sun

Over the course of March in Three Rivers, the length of the day is rapidly increasing. From the start to the end of the month, the length of the day increases by 1 hour, 31 minutes, implying an average daily increase of 3 minutes, 1 second, and weekly increase of 21 minutes, 10 seconds.

The shortest day of the month is March 1, with 11 hours, 13 minutes of daylight and the longest day is March 31, with 12 hours, 44 minutes of daylight.

Hours of Daylight and Twilight in March

The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The earliest sunrise of the month in Three Rivers is 6:24 AM on March 11 and the latest sunrise is 58 minutes later at 7:22 AM on March 12.

The earliest sunset is 5:54 PM on March 1 and the latest sunset is 1 hour, 37 minutes later at 7:32 PM on March 31.

Daylight saving time (DST) starts at 3:00 AM on March 12, 2017, shifting sunrise and sunset to be an hour later.

For reference, on June 21, the longest day of the year, the Sun rises at 5:23 AM and sets 15 hours, 28 minutes later, at 8:51 PM, while on December 21, the shortest day of the year, it rises at 7:36 AM and sets 8 hours, 54 minutes later, at 4:31 PM.

Sunrise & Sunset with Twilight and Daylight Saving Time in March

The solar day over the course of March. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray. The transitions to and from daylight saving time are indicated by the 'DST' labels.

Humidity

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 Three Rivers is essentially constant during March, remaining around 0% throughout.

Humidity Comfort Levels in March

The percentage of time spent at various humidity comfort levels, categorized by dew point: dry < 55°F < comfortable < 60°F < humid < 65°F < muggy < 70°F < oppressive < 75°F < miserable.

Wind

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 Three Rivers is essentially constant during March, remaining within 0.1 miles per hour of 3.5 miles per hour throughout.

For reference, on December 1, the windiest day of the year, the daily average wind speed is 3.7 miles per hour, while on August 3, the calmest day of the year, the daily average wind speed is 2.4 miles per hour.

Average Wind Speed in March

The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.
The wind direction in Three Rivers during March is predominantly out of the south from March 1 to March 12 and the west from March 12 to March 31.

Wind Direction in March

The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions (north, east, south, and west), excluding hours in which the mean wind speed is less than 1 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Solar Energy

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 Three Rivers is increasing during March, rising by 1.5 kWh, from 3.3 kWh to 4.8 kWh, over the course of the month.

Average Daily Incident Shortwave Solar Energy in March

The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

Topography

For the purposes of this report, the geographical coordinates of Three Rivers are 43.820 deg latitude, -121.469 deg longitude, and 4,196 ft elevation.

The topography within 2 miles of Three Rivers contains only modest variations in elevation, with a maximum elevation change of 121 feet and an average elevation above sea level of 4,185 feet. Within 10 miles contains only modest variations in elevation (2,943 feet). Within 50 miles contains large variations in elevation (9,275 feet).

The area within 2 miles of Three Rivers is covered by shrubs (50%) and trees (50%), within 10 miles by trees (65%) and shrubs (31%), and within 50 miles by shrubs (52%) and trees (43%).

Data Sources

This report illustrates the typical weather in Three Rivers year round, 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 4 weather stations near enough to contribute to our estimation of the temperature and dew point in Three Rivers.

For each station, the records are corrected for the elevation difference between that station and Three Rivers 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 Three Rivers is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Three Rivers and a given station.

The stations contributing to this reconstruction are: Bend Municipal Airport (75%, 37 kilometers, northeast); Mahlon Sweet Field Airport (9%, 144 kilometers, west); Roseburg Municipal Airport (8%, 165 kilometers, west); and Klamath Falls Airport (8%, 187 kilometers, south).

Other Data

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.