Santiago, WA Climate


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Santiago, WA has a semi-arid climate with warm summers and mild winters. It experiences hot temperatures during the summer months with an average high of 85°F and cool nights averaging 50°F. During the winter months, temperatures range from around 40°F to the low 60s with occasional drops into the 30s. The area receives minimal rainfall throughout the year, averaging just 11 inches per year.

Santiago, Washington gets 100 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Santiago averages 2 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 129 sunny days per year in Santiago. The US average is 205 sunny days.

Santiago gets some kind of precipitation, on average, 188 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.


Weather Highlights

Summer High: the July high is around 70 degrees
Winter Low: the January low is 36
Rain: averages 100 inches of rain a year
Snow: averages 2 inches of snow a year


Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Santiago is 6.7 (10=best), which means it is less comfortable than most places in Washington.

8.6 Summer - 4.8 Winter
August, July and September are the most pleasant months in Santiago, while December and January are the least comfortable months.

  ClimateSantiago, WashingtonUnited States
  99.8 in.38.1 in.
  1.8 in.27.8 in.
  188.2 days106.2 days
  129 days205 days
  69.5°85.8°
  35.8°21.7°
  6.77
  2.74.3
  509 ft.2443 ft.
Climate
YOU SHOULD KNOW

Many people confuse weather and climate but they are different. Weather is the conditions of the atmosphere over a short period of time, and climate is how the atmosphere is over long periods of time.

Weather is how the atmosphere is behaving and its effects upon life and human activities. Weather can change from minute-to-minute. Most people think of weather in terms of temperature, humidity, precipitation, cloudiness, brightness, visibility, wind, and atmospheric pressure.

Climate is the description of the long-term pattern of weather in a place. Climate can mean the average weather for a particular region and time period taken over 30 years. Climate is the average of weather over time.

August is the hottest month for Santiago with an average high temperature of 70.3°, which ranks it as one of the coolest places in Washington. In Santiago, there are 1 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Santiago are August, July and September.
In Santiago, there are 1.0 days annually when the high temperature is over 90°, which is cooler than most places in Washington.
December has the coldest nighttime temperatures for Santiago with an average of 34.3°. This is warmer than most places in Washington.
In Santiago, there are 53.4 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Washington.
In Santiago, there are 0.0 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Washington.
Humidity in Santiago is generally quite low and comfortable. There are few days during the summer when the humidity becomes unpleasant. The most humid months (but still comfortable) are August, July and September.
November is the wettest month in Santiago with 15.9 inches of rain, and the driest month is July with 1.9 inches. The wettest season is Spring with 40% of yearly precipitation and 8% occurs in Autumn, which is the driest season. The annual rainfall of 99.8 inches in Santiago means that it is one of the wettest places in Washington.
January is the rainiest month in Santiago with 22.5 days of rain, and August is the driest month with only 7.2 rainy days. There are 188.2 rainy days annually in Santiago, which is one of the rainiest places in Washington. The rainiest season is Spring when it rains 33% of the time and the driest is Autumn with only a 14% chance of a rainy day.
An annual snowfall of 1.8 inches in Santiago means that it is one of the least snowy places in Washington. January is the snowiest month in Santiago with 0.6 inches of snow, and 2 months of the year have significant snowfall.
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