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Average Weather in Montesano Washington, United States

In Montesano, the summers are comfortable and partly cloudy and the winters are very cold, wet, and overcast. Over the course of the year, the temperature typically varies from 36°F to 72°F and is rarely below 27°F or above 82°F.

Climate Summary

coldcoolcomfortablecoolcoldJanFebMarAprMayJunJulAugSepOctNovDec77%77%24%24%clearovercastprecipitation: 11.6 inprecipitation: 11.6 in0.6 in0.6 inmuggy: 0%muggy: 0%0%0%drydrytourism score: 5.8tourism score: 5.80.00.0
Click on each chart for more information.

Based on the tourism score, the best time of year to visit Montesano for warm-weather activities is from mid July to late August.

Temperature

The warm season lasts for 3.2 months, from June 18 to September 24, with an average daily high temperature above 67°F. The hottest day of the year is August 2, with an average high of 72°F and low of 53°F.

The cool season lasts for 3.1 months, from November 17 to February 20, with an average daily high temperature below 50°F. The coldest day of the year is December 20, with an average low of 36°F and high of 45°F.

Average High and Low Temperature

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 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

Average Hourly Temperature in MontesanoJanFebMarAprMayJunJulAugSepOctNovDec12 AM4 AM8 AM12 PM4 PM8 PM12 AMvery coldvery coldcoldcoolcoolcomfortable
The average hourly temperature, color coded into bands: frigid < 15°F < freezing < 32°F < very cold < 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.

Gouarec, France (4,955 miles away) is the far-away foreign place with temperatures most similar to Montesano (view comparison).

Clouds

In Montesano, 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 Montesano begins around June 11 and lasts for 3.9 months, ending around October 7. On August 3, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 77% of the time, and overcast or mostly cloudy 23% of the time.

The cloudier part of the year begins around October 7 and lasts for 8.1 months, ending around June 11. On January 15, the cloudiest day of the year, the sky is overcast or mostly cloudy 76% of the time, and clear, mostly clear, or partly cloudy 24% of the time.

Cloud Cover Categories

Cloud Cover Categories in MontesanoclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Aug 377%Aug 377%Jan 1524%Jan 1524%Jun 1150%Jun 1150%Oct 751%Oct 751%clearmostly cloudyovercastpartly cloudymostly clear
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. The chance of wet days in Montesano varies very significantly throughout the year.

The wetter season lasts 6.7 months, from October 8 to April 30, with a greater than 34% chance of a given day being a wet day. The chance of a wet day peaks at 63% on November 18.

The drier season lasts 5.3 months, from April 30 to October 8. The smallest chance of a wet day is 6% on August 4.

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 62% on November 18.

Daily Chance of Precipitation

Daily Chance of Precipitation in MontesanowetwetdryJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Nov 1863%Nov 1863%Aug 46%Aug 46%Jan 155%Jan 155%Oct 834%Oct 834%Apr 3034%Apr 3034%rainmixed
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 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. Montesano experiences extreme seasonal variation in monthly rainfall.

Rain falls throughout the year in Montesano. The most rain falls during the 31 days centered around November 23, with an average total accumulation of 11.6 inches.

The least rain falls around July 29, with an average total accumulation of 0.6 inches.

Average Monthly Rainfall

Average Monthly Rainfall in MontesanoJanFebMarAprMayJunJulAugSepOctNovDec0 in5 in10 in15 in20 inNov 2311.6 inNov 2311.6 inJul 290.6 inJul 290.6 in
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

The sliding 31-day liquid-equivalent quantity of snowfall in Montesano does not vary significantly over the course of the year, staying within 0.1 inches of 0.1 inches throughout.

Average Liquid-Equivalent Monthly Snowfall

Average Liquid-Equivalent Monthly Snowfall in MontesanosnowsnowJanFebMarAprMayJunJulAugSepOctNovDec0 in2 in4 in6 in8 in10 in12 inDec 300.2 inDec 300.2 inJul 240.0 inJul 240.0 inJan 290.1 inJan 290.1 in
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

The length of the day in Montesano varies significantly over the course of the year. In 2018, the shortest day is December 21, with 8 hours, 31 minutes of daylight; the longest day is June 21, with 15 hours, 54 minutes of daylight.

Hours of Daylight and Twilight

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 is at 5:18 AM on June 15, and the latest sunrise is 2 hours, 41 minutes later at 8:00 AM on November 3. The earliest sunset is at 4:25 PM on December 11, and the latest sunset is 4 hours, 48 minutes later at 9:13 PM on June 26.

Daylight saving time (DST) is observed in Montesano 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

Sunrise & Sunset with Twilight and Daylight Saving Time in MontesanoJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 155:18 AMJun 155:18 AM9:13 PMJun 269:13 PMJun 26Dec 114:25 PMDec 114:25 PM8:00 AMNov 38:00 AMNov 3Mar 11DSTMar 11DSTDSTNov 4DSTNov 4daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day over the course of the year 2018. 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 perceived humidity level in Montesano, 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

Humidity Comfort Levels in MontesanoJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Feb 230%Feb 230%Aug 20%Aug 20%comfortablecomfortabledrydryhumidhumid
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 Montesano experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 5.8 months, from October 21 to April 14, with average wind speeds of more than 5.0 miles per hour. The windiest day of the year is December 4, with an average hourly wind speed of 6.1 miles per hour.

The calmer time of year lasts for 6.2 months, from April 14 to October 21. The calmest day of the year is August 12, with an average hourly wind speed of 3.9 miles per hour.

Average Wind Speed

Average Wind Speed in MontesanowindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph1 mph2 mph3 mph4 mph5 mph6 mph7 mph8 mph9 mph10 mphDec 46.1 mphDec 46.1 mphAug 123.9 mphAug 123.9 mphOct 215.0 mphOct 215.0 mphApr 145.0 mphApr 145.0 mph
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The predominant average hourly wind direction in Montesano varies throughout the year.

The wind is most often from the south for 1.3 months, from February 19 to March 28 and for 1.9 months, from October 13 to December 10, with a peak percentage of 42% on November 13. The wind is most often from the west for 6.5 months, from March 28 to October 13, with a peak percentage of 71% on July 19. The wind is most often from the east for 2.3 months, from December 10 to February 19, with a peak percentage of 41% on January 1.

Wind Direction

Wind Direction in MontesanoESWSEJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%westsoutheastnorth
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).

Water Temperature

Montesano 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 3.7 months, from June 13 to October 4, with an average temperature above 56°F. The day of the year with the warmest water is August 28, with an average temperature of 58°F.

The time of year with cooler water lasts for 3.8 months, from December 8 to April 1, with an average temperature below 50°F. The day of the year with the coolest water is January 28, with an average temperature of 48°F.

Average Water Temperature

The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

Best Time of Year to Visit

To characterize how pleasant the weather is in Montesano 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 Montesano for general outdoor tourist activities is from mid July to late August, with a peak score in the first week of August.

Tourism Score

Tourism Score in Montesanobest timeJanFebMarAprMayJunJulAugSepOctNovDec02468105.85.80.00.0precipitationprecipitationcloudscloudstemperaturetemperaturetourism score
The tourism score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

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 Montesano for hot-weather activities is from mid July to mid August, with a peak score in the first week of August.

Beach/Pool Score

Beach/Pool Score in MontesanoJanFebMarAprMayJunJulAugSepOctNovDec02468101.21.20.00.0precipitationprecipitationcloudscloudstemperaturetemperaturebeach/pool score
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

Methodology

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.

Growing Season

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 Montesano typically lasts for 6.8 months (208 days), from around April 10 to around November 4, rarely starting before March 18 or after May 4, and rarely ending before October 16 or after November 22.

Time Spent in Various Temperature Bands and the Growing Season

Time Spent in Various Temperature Bands and the Growing Season in Montesanogrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Apr 1050%Apr 1050%Nov 450%Nov 490%May 490%May 490%Oct 1690%Oct 1610%Mar 1810%Mar 1810%Nov 2210%Nov 220%Jan 250%Jan 25Jul 25100%Jul 25100%very coldcoldcoolfreezingwarm
The percentage of time spent in various temperature bands: frigid < 15°F < freezing < 32°F < very cold < 45°F < cold < 55°F < cool < 65°F < comfortable < 75°F < warm < 85°F < hot < 95°F < sweltering. The black line is the percentage chance that a given day is 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.

Based on growing degree days alone, the first spring blooms in Montesano should appear around April 26, only rarely appearing before April 10 or after May 12.

Growing Degree Days

Growing Degree Days in MontesanoJanFebMarAprMayJunJulAugSepOctNovDec0°F200°F400°F600°F800°F1,000°F1,200°F1,400°F1,600°F1,800°FApr 2690°FApr 2690°FAug 9900°FAug 9900°FDec 311,541°FDec 311,541°F
The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands.

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 experiences extreme seasonal variation over the course of the year.

The brighter period of the year lasts for 3.1 months, from May 19 to August 23, with an average daily incident shortwave energy per square meter above 5.7 kWh. The brightest day of the year is July 16, with an average of 6.9 kWh.

The darker period of the year lasts for 3.9 months, from October 25 to February 22, with an average daily incident shortwave energy per square meter below 2.1 kWh. The darkest day of the year is December 25, with an average of 0.8 kWh.

Average Daily Incident Shortwave Solar Energy

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 Montesano are 46.981 deg latitude, -123.603 deg longitude, and 121 ft elevation.

The topography within 2 miles of Montesano contains significant variations in elevation, with a maximum elevation change of 577 feet and an average elevation above sea level of 114 feet. Within 10 miles contains significant variations in elevation (1,352 feet). Within 50 miles contains very significant variations in elevation (6,729 feet).

The area within 2 miles of Montesano is covered by herbaceous vegetation (33%), trees (33%), and cropland (22%), within 10 miles by trees (65%) and shrubs (14%), and within 50 miles by trees (55%) and water (23%).

Data Sources

This report illustrates the typical weather in Montesano, 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 5 weather stations near enough to contribute to our estimation of the temperature and dew point in Montesano.

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

The stations contributing to this reconstruction are: Bowerman Airport (46%, 25 kilometers, west); Sanderson Field (19%, 45 kilometers, northeast); Olympia Regional Airport (15%, 53 kilometers, east); Chehalis-Centralia Airport (13%, 58 kilometers, southeast); and Clatsop County Airport (6%, 94 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.

Disclaimer

The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.

We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.